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退火法制备TiO2/Ti电极及其对有机含铀废水的电化学净化 认领 引用
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作者 彭超 李天宇 +4 位作者 吕慧涛 陈佳琪 颜永得 薛云 田国新 《原子能科学技术》 EI CAS CSCD 北大核心 2026年第1期148-157,共10页
高温气冷堆燃料元件生产过程中会产生相当量的偏碱性含铀废水,其中还含有一定浓度的尿素、聚乙烯醇、四氢糠醇等有机物。为实现有机含铀废水的净化,本研究针对这种废水开展铀去除研究。首先通过对Ti片进行680℃退火处理,制备了TiO2/T... 高温气冷堆燃料元件生产过程中会产生相当量的偏碱性含铀废水,其中还含有一定浓度的尿素、聚乙烯醇、四氢糠醇等有机物。为实现有机含铀废水的净化,本研究针对这种废水开展铀去除研究。首先通过对Ti片进行680℃退火处理,制备了TiO2/Ti电极,然后配制有机含铀模拟溶液,采用电化学法开展模拟溶液中铀的去除研究,探索了碳酸根浓度、pH、铀初始浓度、时间、电压等因素对铀去除率的影响,并推测了过程的反应机理。X射线光电子谱(XPS)、扫描电子显微镜(SEM)、电子能谱(EDS)和X射线衍射(XRD)分析表明,通过退火处理合成的TiO2/Ti电极表面被颗粒状金红石相TiO2覆盖,说明通过退火法能成功制备TiO2/Ti电极。电化学法去除模拟溶液(pH=9)中铀的最优条件为:碳酸钠浓度0.01 mol/L、电压10 V、时间5 h,此条件下铀去除率达95.43%。0.01 mol/L碳酸钠溶液中,铀的还原电位为-0.99 V(vs SCE),其还原过程为一步单电子过程,U(Ⅵ)得到1个电子还原为U(Ⅴ),再歧化为U(Ⅳ)和U(Ⅵ),铀是以UO2和U2O5的形态沉积在电极表面。在4种共存物中,硝酸铵、尿素和聚乙烯醇对铀去除有明显的抑制,而四氢糠醇则没有明显影响。它们共同存在时,在10 V条件下,铀去除率下降至36.75%,但通过提升电压至15 V,铀去除率上升至85.99%。本文所制备TiO2/Ti电极的重复利用性良好,重复使用8次后,铀去除率仍能达到90%以上,每次重复使用,铀的回收率基本能达90%以上。 展开更多
关键词 含铀废水 电化学 TiO2/Ti电极 有机物
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Enhancing Capacitance Performance of Ti3C2Tx MXene as Electrode Materials of Supercapacitor: From Controlled Preparation to Composite Structure Construction 认领 引用 被引量：23
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作者 Xiaobei Zang Jiali Wang +5 位作者 Yijiang Qin Teng Wang Chengpeng He Qingguo Shao Hongwei Zhu Ning Cao 《Nano-Micro Letters》 SCIE EI CAS CSCD 2020年第6期152-175,共24页
Ti3C2Tx,a novel two-dimensional layer material,is widely used as electrode materials of supercapacitor due to its good metal conductivity,redox reaction active surface,and so on.However,there are many challenges to be... Ti3C2Tx,a novel two-dimensional layer material,is widely used as electrode materials of supercapacitor due to its good metal conductivity,redox reaction active surface,and so on.However,there are many challenges to be addressed which impede Ti3C2Tx obtaining the ideal specific capacitance,such as restacking,re-crushing,and oxidation of titanium.Recently,many advances have been proposed to enhance capacitance performance of Ti3C2Tx.In this review,recent strategies for improving specific capacitance are summarized and compared,for example,film formation,surface modification,and composite method.Furthermore,in order to comprehend the mechanism of those efforts,this review analyzes the energy storage performance in different electrolytes and influencing factors.This review is expected to predict redouble research direction of Ti3C2Tx materials in supercapacitors. 展开更多
关键词 Ti3C2Tx MXene Capacitance performance Storage mechanism Electrode materials Supercapacitor
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Effect of Sb dopant amount on the structure and electrocatalytic capability of Ti/Sb-SnO_2 electrodes in the oxidation of 4-chlorophenol 认领 引用 被引量：24
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作者 KONG Jiang-tao SHI Shao-yuan +1 位作者 ZHU Xiu-ping NI Jin-ren 《Journal of Environmental Sciences》 SCIE EI CAS 2007年第11期1380-1386,共7页
Ti/Sb-SnO2 anodes were prepared by thermal decomposition to examine the influence of the amount of Sb dopant on the structure and electrocatalytic capability of the electrodes in the oxidation of 4-chlorophenol. The p... Ti/Sb-SnO2 anodes were prepared by thermal decomposition to examine the influence of the amount of Sb dopant on the structure and electrocatalytic capability of the electrodes in the oxidation of 4-chlorophenol. The physicochemical properties of the Sb-SnO2 coating were markedly influenced by different amounts of Sb dopant. The electrodes, which contained 5% Sb dopant in the coating, presented a much more homogenous surface and much smaller mud-cracks, compared with Ti/Sb-SnO2 electrodes containing 10% or 15% Sb dopant, which exibited larger mud cracks and pores on the surface. However, the main microstructure remained unchanged with the addition of the Sb dopant. No new crystal phase was observed by X-ray diffraction （XRD）. The electrochemical oxidation of 4-chlorophenol on the Ti/SnO2 electrode with 5% Sb dopant was inclined to electrochemical combustion; while for those containing more Sb dopant, intermediate species were accumulated. The electrodes with 5% Sb dopant showed the highest efficiency in the bulk electrolysis of 4-chlorophenol at a current density of 20 mA/cm^2 for 180 min; and the removal rates of 4-chlorophenol and COD were 51.0% and 48.9%, respectively. 展开更多
关键词 4-chlorophenol cyclic voltammogram electrochemical oxidation Sb dopant Ti/Sb-SnO2 electrode
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A high activity of Ti/SnO_2-Sb electrode in the electrochemicaldegradation of 2,4-dichlorophenol in aqueous solution 认领 引用 被引量：5
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作者 Junfeng Niu Dusmant Maharana +2 位作者 Jiale Xu Zhen Chai Yueping Bao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2013年第7期1424-1430,共7页
Electrochemicaldegradation of2,4-dichlorophenol （2,4-DCP） in aqueous solutionwas investigated over Ti/SnO2-Sb anode. The factors influencing thedegradation rate, such as applied currentdensity （2-40 mA/cm2 ）, pH ... Electrochemicaldegradation of2,4-dichlorophenol （2,4-DCP） in aqueous solutionwas investigated over Ti/SnO2-Sb anode. The factors influencing thedegradation rate, such as applied currentdensity （2-40 mA/cm2 ）, pH （3-11） and initial concentration （5-200 mg/L）were evaluated. Thedegradation of2,4-DCP followed apparent pseudo first-order kinetics. Thedegradation ratio on Ti/SnO2 -Sb anode attained 〉 99.9% after 20 min of electrolysis at initial 5-200 mg/L concentrations at a constant currentdensity of 30 mA/cm2 with a 10 mmol/L sodium sulphate （Na2SO4 ） supporting electrolyte solution. The results showed that 2,4-DCP （100 mg/L）degradation and total organic carbon （TOC） removal ratio achieved 99.9% and 92.8%, respectively, at the optimal conditions after 30 min electrolysis. Under this condition, thedegradation rate constant （k） and thedegradation half-life （t1/2 ）were 0.21 min1 and （2.8 ± 0.2） min, respectively. Mainly carboxylic acids （propanoic acid, maleic acid, propanedioic acid, acetic acid and oxalic acid） weredetected as intermediates. The energy efficiencies for2,4-DCPdegradation （5-200 mg/L）with Ti/SnO2-Sb anode ranged from 0.672 to 1.602 g/kWh. The Ti/SnO2-Sb anodewith a high activity to rapid organic oxidation could be employed todegrade chlorophenols, particularly2,4-DCP inwastewater. 展开更多
关键词 2 4-dichlorphenol Ti/SnO2 -Sb electrode electrochemicaldegradation total organic carbon
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Preparation and application of pharmaceutical wastewater treatment by praseodymium doped SnO_2/Ti electrocatalytic electrode 认领 引用 被引量：16
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作者 韩国成 刘峥 王永燎 《Journal of Rare Earths》 SCIE EI CAS 2008年第4期532-537,共6页
Praseodymium was selected as a promoter for SnO2/Ti electrode to improve the electrocatalytic performance by electrodeposition in pharmaceutical wastewater treatment; the micrograph and the structure were characterize... Praseodymium was selected as a promoter for SnO2/Ti electrode to improve the electrocatalytic performance by electrodeposition in pharmaceutical wastewater treatment; the micrograph and the structure were characterized by SEM and XRD. Mixture uniform design was used in the optimization of the electrolytic conditions; mathematical model was established according to the rate of wiping COD off, which revealed the relationship between the current intensity, time of electrolysis, the amount of doped Pr, and the ratio of area （SnOJTi：Al）. On the basis of the analysis of the empirical model, the optimized parameters had been obtained; the rate of wiping COD off was up to 94.9%, it decreased from 392 to 20 mg/L. Experimental results showed that the electrocatalytic performance of the electrode doped with Pr was superior for the treatment of pharmaceutical wastewater. 展开更多
关键词 SnO2/Ti electrode electrocatalytic mixture uniform design pharmaceutical wastewater rare earths
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Electrochemical oxidation of aniline by a novel Ti/TiOxHy/Sb-SnO2electrode 认领 引用 被引量：10
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作者 Xiaoliang Li Hao Xu Wei Yan 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第11期1860-1870,共11页
Electrochemical oxidation of aniline in aqueous solution was investigated over a novel Ti/TiOxHy/Sb-SnO2 electrode prepared by the electrodeposition method.Scanning electron microscopy,X-ray diffraction,and electroche... Electrochemical oxidation of aniline in aqueous solution was investigated over a novel Ti/TiOxHy/Sb-SnO2 electrode prepared by the electrodeposition method.Scanning electron microscopy,X-ray diffraction,and electrochemical measurements were used to characterize its morphology,crystal structure,and electrochemical properties.Removal of aniline by the Ti/TiOxHy/Sb-SnO2electrode was investigated by ultraviolet-Visible spectroscopy and chemical oxygen demand(COD)analysis under different conditions,including current densities,initial concentrations of aniline,pH values,concentrations of chloride ions,and types of reactor.It was found that a higher current density,a lower initial concentration of aniline,an acidic solution,the presence of chloride ions(0.2wt%NaCl),and a three-dimensional(3D)reactor promoted the removal efficiency of aniline.Electrochemical degradation of aniline followed pseudo-first-order kinetics.The aniline(200 mL of 100mg·L-(-1))and COD removal efficiencies reached 100%and 73.5%,respectively,at a current density of 20 mA·cm-(-2),pH of 7.0,and supporting electrolyte of 0.5 wt%Na2SO4 after 2 h electrolysis in a 3D reactor.These results show that aniline can be significantly removed on the Ti/TiOxHy/Sb-SnO2electrode,which provides an efficient way for elimination of aniline from aqueous solution. 展开更多
关键词 Aniline Ti/TiOxHy/Sb-SnO2electrode Electrochemical oxidation Chloride ions Three-dimensional reactor
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Preparation and performance of dye-sensitized solar cells based on ZnO-modified TiO_2 electrodes 认领 引用 被引量：2
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作者 Sheng-jun Li Yuan Lin +4 位作者 Wei-wei Tan Jing-bo Zhang Xiao-wen Zhou Jin-mao Chen Zeng Chen 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS 2010年第1期92-97,共6页
The ZnO-modified TiO2 electrode was prepared by adding Zn（CH3COO）2·2H2O to the TiO2 colloid during the sol-gel production process, and was used in dye-sensitized solar cells （DSCs）. The open circuit voltage ... The ZnO-modified TiO2 electrode was prepared by adding Zn（CH3COO）2·2H2O to the TiO2 colloid during the sol-gel production process, and was used in dye-sensitized solar cells （DSCs）. The open circuit voltage （Voc） and fill factor （if） of the cells were improved sig- nificantly. The performances of the ZnO-modified TiO2 electrode such as dark current, transient photocurrent, impedance, absorption spectra, and fiat band potential （Vfb） were investigated. It is found that the interface charge recombination impedance increases and Vfb shifts about 200 mV toward the cathodic potential. The effect mechanism of ZnO modification on the performance of DSCs may be that ZnO occupies the surface states of the TiO2 film. 展开更多
关键词 dye-sensitized solar cells TiO2 electrode modification photoelectrochemical properties
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Electrochemical oxidation of Rhodamine B with cerium and sodium dodecyl benzene sulfonate co-modified Ti/Pb02electrodes:Preparation,characterization,optimization,application 认领 引用 被引量：3
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作者 Zhen Wei Xuanqi Kang +3 位作者 Shangyuan Xu Xiaokang Zhou Bo Jia Qing Feng 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2021年第4期191-202,共12页
Regulation of the electronic structure and interface property becomes a major strategy in the preparation of electrocatalyst.This paper reports the synthesis of cerium(Ce)and sodium dodecyl benzene sulfonate(SDBS)como... Regulation of the electronic structure and interface property becomes a major strategy in the preparation of electrocatalyst.This paper reports the synthesis of cerium(Ce)and sodium dodecyl benzene sulfonate(SDBS)comodified Ti/PbO2electrodes(Ti/PbO2CeSDBS).Ce and SDBS could greatly change the electronic structure and interface property of PbO2.Ti/PbO2CeSDBS exhibited excellent electrocatalytic activity and stability in Rhodamine B(RhB)electrocatalytic oxidation reaction.The improved electrocatalytic activity associates with the synergistic effect of electronic and interface factors.In the electrochemical degradation of RhB,the removal efficiencies of RhB and COD are about 0.880 and 0.694 respectively after the electrolysis of 220 min with Ti/PbO2Ce4SDBS40,which are higher than the contrast Ti/PbO2electrodes.In the meantime,the accelerated lifetime of Ti/PbO2Ce4SDBS40 is more than 6.2 times than that of Ti/PbO2. 展开更多
关键词 Ti/PbO2electrodes Electrocatalytic oxidation
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Enhanced photoelectrocatalytic degradation of ammonia by in situ photoelectrogenerated active chlorine on TiO_2 nanotube electrodes 认领 引用 被引量：2
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作者 Shuhu Xiao Dongjin Wan +2 位作者 Kun Zhang Hongbin Qu Jianfeng Peng 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第12期103-108,共6页
TiO2 nanotube （TINT） electrodes anodized in fluorinated organic solutions were successfully prepared on Ti sheets. Field-emission scanning electron microscopy （FE-SEM） and X-ray diffraction （XRD） were performed ... TiO2 nanotube （TINT） electrodes anodized in fluorinated organic solutions were successfully prepared on Ti sheets. Field-emission scanning electron microscopy （FE-SEM） and X-ray diffraction （XRD） were performed to characterize the TiNT electrodes. The linear voltammetry results under irradiation showed that the TiNT electrode annealed at 450℃ presented the highest photoelectrochemical activity. By combining photocatalytic with electrochemical process, a significantly synergetic effect on ammonia degradation was observed with Na2SO4 as supporting electrolyte at pH 10.7. Furthermore, the photoelectrocatalytic efficiency on the ammonia degradation was greatly enhanced in presence of chloride ions without the limitation ofpH. The degradation rate was improved by 14.8 times reaching 4.98 × 10^-2 min^-1 at pH 10.7 and a faster degradation rate of 6.34 × 10^-2 min^-1 was obtained at pH 3.01. The in situ photoelectrocatalytic generated active chlorine was proposed to be responsible for the improved efficiency. On the other hand, an enhanced degradation of ammonia using TiNT electrode fabricated in fluorinated organic solution was also confirmed compared to TiNT electrode anodized in fluorinated water solution and TiO2 film electrode fabricated by sol-gel method. Finally, the effect of chloride concentration was also discussed. 展开更多
关键词 TiO2 nanotube electrodes Ammonia Photoelectrocatalytic process Enhanced degradation
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Photoelectrochemical Character of TiO_2 Nanocrystalline Electrodes Sensitized by Aluminum Phthalocyanines Modified with Sulfonate Groups 认领 引用
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作者 PAN Kai LIU Zhao-yue +2 位作者 WANG Geng BAI Yu-bai LI Tie-jin 《Chemical Research in Chinese Universities》 SCIE EI CAS 2006年第4期484-487,共4页
Particular kinds of TiO2 nanocrystalline electrodes were sensitized by aluminum phthalocyanines modified with sulfonate groups [ Al（OH） PcSm ]. It was found that in the red region, the electrodes show obvious photoe... Particular kinds of TiO2 nanocrystalline electrodes were sensitized by aluminum phthalocyanines modified with sulfonate groups [ Al（OH） PcSm ]. It was found that in the red region, the electrodes show obvious photoelectrical responses. The surface photovoltage spectra and photocurrent action spectra indicate that in the red region, the monomers of aluminum phthalocyanines have a greater influence on the determination of the photoelectrical response of TiO2 electrodes than the dimers. The dye-sensitized solar cells were obtained by using the aluminum phthalocyaninessensitized TiO2 electrodes and Pt electrodes, which have an open circuit photovoltage of 360 mV, a short circuit photocurrent of 39. 4 μA/cm^2 , a fill factor of 0. 54 and a maximum power output of 7.65 μW/cm^2 under a light intensity of 50 mW/cm^2. 展开更多
关键词 Aluminum phthalocyanines [ Al（OH） PcS, ] TiO2 nanocrystalline electrode Photoelectrochemical character
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Sensitization of Microporous Nanocrystalline TiO_2 Electrode with Quantum Sized RuS2 Particles 认领 引用
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作者 Jing Huai FANG Lian Yong SU +2 位作者 Jing Wen Uny Xiang Yang ZHANG Zuhng LU 《Chinese Chemical Letters》 SCIE CAS 1997年第5期437-438,共2页
The microporous nanocry'sta1line TiO2 electrode with large surface roughness factor hasbeen prepared on a conducting glass support. Modification of the TiO2 electrode by in situ preparingquantum sized RuS2 particl... The microporous nanocry'sta1line TiO2 electrode with large surface roughness factor hasbeen prepared on a conducting glass support. Modification of the TiO2 electrode by in situ preparingquantum sized RuS2 particles on the surface of TiO2 electrode extends the optical absorptionspectrum and photocurrent action specmim into visible region. In addition, compared with RuS2 bulknlaterials- a blue shifi in both absorption spectrum and photocurrent action speCtrum of RuS2rriO2elcctrode is obserived and explained in terms of quantum sized effect. 展开更多
关键词 TiO Sensitization of Microporous Nanocrystalline TiO2 Electrode with Quantum Sized RuS2 Particles
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Kinetics of photoelectrocatalytic degradation of endocrine disrupting chemicals using sulfur-doped TiO_2 /Ti photoelectrodes 认领 引用
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作者 孙海健 金玉苹 +3 位作者 王斌 刘惠玲 陈超 韩蕾 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2010年第4期516-520,共5页
In this study,sulfur-doped TiO2 /Ti photoelectrodes were prepared by anodization. The morphology, crystalline structure,composition of sulfur-doped TiO2 /Ti film and light absorption property were examined by SEM,XRD,... In this study,sulfur-doped TiO2 /Ti photoelectrodes were prepared by anodization. The morphology, crystalline structure,composition of sulfur-doped TiO2 /Ti film and light absorption property were examined by SEM,XRD,XRF,XPS and UV/VIS respectively. Dimethyl phthalate( DMP) ,one kind of environmental disrupting chemicals( EDCs) ,was degraded by the optimized photoelectrodes. Power of xenon light,initial concentration of DMP,photoelectrocatalytic( PEC) area of photoelectrode and bias were investigated in the study on kinetics of PEC degradation of DMP. Hence,this study concluded that the optimum conditions were power of xenon light 150 W,initial concentration of DMP 1 mg/L,PEC area of sulfur-doped TiO2 /Ti photoelectrode 10 cm2,bias 1. 3 V in the PEC reaction system. 展开更多
关键词 sulfur-doped TiO2 /Ti photoelectrodes anodization photoelectrocatalytic ( PEC) degradation dimethyl phthalate( DMP) kinetics
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Influence of Modification of Counter Electrode on PhotoelectricProperties of Dye-sensitized TiO_2 Solar Cells 认领 引用
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作者 HAOSan-cun FANLe-qing WUJi-huai HUANGYun-fang LINJian-ming 《Chemical Research in Chinese Universities》 SCIE EI CAS 2004年第2期205-209,共5页
A dye-sensitized nanocrystalline TiO 2 solar cell(DYSC) was assembled, of which counter electrode was modified already by platinum, nickel and carbon. It was found that the DYSC had better photoelectric performance wh... A dye-sensitized nanocrystalline TiO 2 solar cell(DYSC) was assembled, of which counter electrode was modified already by platinum, nickel and carbon. It was found that the DYSC had better photoelectric performance when the electrode was modified by platinum than by nickel and carbon. The influence of the incidence light wavelength on the incidence monochromatic photoelectric conversion efficiency(IPCE) was investigated. The result shows that the IPCE mainly depends on the short-circuit current density(I SC) of a DYSC, and the IPCE reaches 48.32% under the irradiation with the wavelength of 560 nm when the counter electrode of a DYSC was modified by platinum. The influence of incident light intensity on the photoelectric properties of a DYSC was also investigated. It was found that the I SC and open-circuit voltage(V OC) increased and the fill factor(f f) of the DYSC decreased with the increase of the incident light intensity. 展开更多
关键词 Dye-sensitized nanocrystalline TiO 2 solar cell Counter electrode Modification Incident light wavelength Incident light intensity
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Electrochemical determination of vitamin C in the presence of uric acid by a novel TiO_2 nanoparticles modified carbon paste electrode 认领 引用 被引量：4
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作者 Mohammad Mazloum-Ardakani Mohammad Ali Sheikh-Mohseni +2 位作者 Hadi Beitollahi Ali Benvidi Hossein Naeimi 《Chinese Chemical Letters》 SCIE CAS 2010年第12期1471-1474,共4页
The electrochemical behavior of vitamin C（ascorbic acid or AA） is investigated on the surface of a carbon-paste electrode modified with TiO2 nanoparticles and 2,2＇-（1,2 butanediylbis（nitriloethylidyne））-bis-hyd... The electrochemical behavior of vitamin C（ascorbic acid or AA） is investigated on the surface of a carbon-paste electrode modified with TiO2 nanoparticles and 2,2＇-（1,2 butanediylbis（nitriloethylidyne））-bis-hydroquinone（BBNBH）.The prepared modified electrode showed an efficient catalytic role in the electrochemical oxidation of AA,leading to remarkable decrease in oxidation overpotential and enhancement of the kinetics of the electrode reaction.This modified electrode exhibits well-separated oxidation peaks for AA and uric acid（UA）.The modified electrode is successfully applied for the accurate determination of AA in pharmaceutical preparations. 展开更多
关键词 Ascorbic acid Uric acid TiO2 nanoparticles Electrocatalysis Modified carbon paste electrode
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Electro-catalytic degradation properties of Ti/SnO_2–Sb electrodes doped with different rare earths 认领 引用 被引量：6
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作者 Fu-Liang Zhu Yan-Shuang Meng Xiu-Yang Huang 《Rare Metals》 SCIE EI CAS CSCD 2016年第5期412-418,共7页
Ti/SnO2–Sb electrode has a good effect on the removal of organic pollutants. But its short service life limits its large-scale application in industry. Electro-catalytic degradation performances and service life of t... Ti/SnO2–Sb electrode has a good effect on the removal of organic pollutants. But its short service life limits its large-scale application in industry. Electro-catalytic degradation performances and service life of the electrode can be significantly improved by doping rare earth（RE） ions into the oxide coating of Ti/SnO2–Sb electrode. Ti/SnO2–Sb electrodes doped with different RE elements（Ce, Dy, La, and Eu） were prepared by the thermal decomposition method at 550 ℃. Electro-catalytic degradation performances of electrodes doped with different RE elements were evaluated by linear sweep voltammetry（LSV） and Tafel curves. During the electrolysis,the conversion of p-nitrophenol was performed with these electrodes as anodes under galvanostatic control. The structures and morphologies of the surface coating of the electrodes were characterized by scanning electron microscope（SEM）. The results demonstrate that the electro-catalytic degradation performances of Ti/SnO2–Sb electrodes are improved to different levels by doping different RE ions. Improved Ti/SnO2–Sb electrodes by the introduction of different RE have higher oxygen evolution potential, better electro-catalysis ability, better coverage,and longer electrode life. 展开更多
关键词 Ti/SnO_2–Sb electrode Rare earth doped Thermal decomposition method Catalytic degradation
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Ti/SnO2-Sb2O5/PbO2电极电-Fenton降解脱硫废液效能研究 认领 引用
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作者 李瑞娜 马芸霞 +4 位作者 张兴忠 李翔 康羿锟 李忠国 徐亚 《环境科学研究》 CAS CSCD 北大核心 2026年第8期2098-2107,共10页
针对焦化HPF法脱硫废液高盐、高COD及难降解有机物富集、常规生化处理受限等问题,在对脱硫废液进行前期预处理的基础上,采用“热分解-电沉积”联合工艺制备Ti/SnO2-Sb2O5/PbO2复合电极并构建电-Fenton处理体系,结合工艺优化... 针对焦化HPF法脱硫废液高盐、高COD及难降解有机物富集、常规生化处理受限等问题,在对脱硫废液进行前期预处理的基础上,采用“热分解-电沉积”联合工艺制备Ti/SnO2-Sb2O5/PbO2复合电极并构建电-Fenton处理体系,结合工艺优化及UV-Vis、GC-MS、FT-IR、3D-EEM等手段,考察该电极对脱硫废液中有机物的降解效果。结果表明:①Ti/SnO2-Sb2O5/PbO2复合电极电-Fenton体系处理脱硫废液的过程中,COD的降解过程符合伪二级表观动力学特征,在最佳运行条件(电流密度为60 mA/cm2、FeSO4·7H2O投加量为0.5 mmol/L、极板间距为2 cm、空气流量为2 L/min)下反应8 h,COD去除率达97.24%,色度去除率达99.75%,SCN-浓度降至检出限以下,BOD5/COD(B/C)由0.009提升至0.278,可生化性明显提高。②UV-Vis、GC-MS、FT-IR及3D-EEM分析结果表明,该电-Fenton体系生成的强氧化性物种可有效破坏发色团、醚键和芳香环结构,促使大分子有机物断链、开环并转化为小分子中间产物,实现复杂有机骨架的有效解体。研究显示,Ti/SnO2-Sb2O5/PbO2复合电极电-Fenton体系能够通过开环与断链机制促进复杂有机骨架的降解与转化,在有效削减有机污染物浓度的同时改善废液的可生化性。研究结果可为高盐难降解焦化脱硫废液的深度处理提供技术参考与理论借鉴。 展开更多
关键词 脱硫废液 电-Fenton Ti/SnO2-Sb2O5/PbO2电极 降解效能
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Pd-MnO_2 nanoparticles/TiO_2 nanotube arrays(NTAs) photo-electrodes photo-catalytic properties and their ability of degrading Rhodamine B under visible light 认领 引用 被引量：1
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作者 Mohamed Thabit Huiling Liu +1 位作者 Jian Zhang Bing Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2017年第10期53-60,共8页
Pd-MnO2/TiO2 nanotube arrays（NTAs） photo-electrodes were successfully fabricated via anodization and electro deposition subsequently; the obtained Pd-MnO2/TiO2 NTAs photo electrodes were analyzed by scanning electro... Pd-MnO2/TiO2 nanotube arrays（NTAs） photo-electrodes were successfully fabricated via anodization and electro deposition subsequently; the obtained Pd-MnO2/TiO2 NTAs photo electrodes were analyzed by scanning electron microscopy（SEM）, X-ray diffraction（XRD） and characterized accordingly. Moreover, the light harvesting and absorption properties were investigated via ultraviolet–visible diffuse reflectance spectrum（DRS）; photo degradation efficiency was investigated via analyzing the photo catalytic degradation of Rhodamine B under visible illumination（xenon light）. The performed analyses illustrated that Pd-MnO2 codoped particles were successfully deposited onto the surface of the TiO2 nanotube arrays;DRS results showed significant improvement in visible light absorption which was between400 and 700 nm. Finally, the photo catalytic degradation efficiency results of the designated organic pollutant（Rhodamine B） illustrated a superior photocatalytic（PC） efficiency of approximately 95% compared to the bare TiO2 NTAs, which only exhibited a photo catalytic degradation efficiency of approximately 61%, thus it indicated the significant enhancement of the light absorption properties of fabricated photo electrodes and their yield of UOH radicals. 展开更多
关键词 Pd-MnO2/TiO2 Nanotubes Photo electrode Photo degradation Rhodamine B Photo-catalytic efficiency
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Electrically enhanced photodegradation of an azodye(Acid Orange II) using a Pt/TiO_2 film electrode irradiating with an UV lamp 认领 引用
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作者 SUJing CHENGuo－hua 《Journal of Environmental Sciences》 SCIE EI CAS 2003年第1期60-64,共5页
A photoelectrochemical process in the degradation of an azodye (Acid Orange II) on a Pt/TiO 2 film electrode was investigated. By using the glass device and the voltage stabilized source of direct current, decolorizat... A photoelectrochemical process in the degradation of an azodye (Acid Orange II) on a Pt/TiO 2 film electrode was investigated. By using the glass device and the voltage stabilized source of direct current, decolorization ratios higher than 78% were observed during a period of 5h. Comparing this value with the sum of the decolorization ratios obtained by a sole application of electrochemical(lower than 3%) and photochemical(about 23%) procedures, a significant synergic effect between both processes was observed. The effects of adscititious voltage and pH value on the decolorization ratios were obvious while the effect of the amount of aeration was minor. 展开更多
关键词 photoelectrochemical process Pt/TiO 2 film electrode synergic effect
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Electrophoretic Deposition of TiO2/Nb2O5 Composite Electrode Thin Films for Photovoltaic Application 认领 引用 被引量：1
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作者 John Njagi Nguu Bernard Odhiambo Aduda Francis Wanjala Nyongesa Robinson Juma Musembi 《Journal of Energy and Power Engineering》 CAS 2014年第4期757-764,共8页
Nano sized powders of TiO2 （titanium dioxide） and Nb2O5 （Niobium （V） oxide） were used to fabricate TiO2/Nb2O5 composites thin films by EPD （electrophoretic deposition） technique. The metal oxide powders, toget... Nano sized powders of TiO2 （titanium dioxide） and Nb2O5 （Niobium （V） oxide） were used to fabricate TiO2/Nb2O5 composites thin films by EPD （electrophoretic deposition） technique. The metal oxide powders, together with magnesium nitrate hexahydrate pellets, were suspended in propan-2-ol inside an EPD cell. The electrodes, placed 1.2 cm apart, were partially immersed in the suspension and a DC potential applied across them. Key EPD process parameters, which include applied DC electric field, deposition time and solid concentration in suspension, were optimized through visual inspection and from UV-Vis-NIR spectrophotometer spectra. The highest （55%） transmittance was obtained for films with deposition time of 90 s, powder concentration of 0.01 g/40 mL, and 35 V DC （direct current） voltage. XRD micrographs confirmed that TiO2 and Nb2O5 particles were presented in the composite film. SEM （scanning electron microscope） micrographs of the composite electrode thin films showed that porous films of high quality with well controlled morphology were deposited by using the EPD technique. 展开更多
关键词 Electrophoretic deposition TiO2/Nb2O5 composite electrode thin films.
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改性Ti/PbO2电极研究进展 认领 引用
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作者 尔古阿沙 高官金 +1 位作者 刘强兵 蒋新宇 《科技导报》 CAS CSCD 北大核心 2026年第5期103-111,共9页
Ti/PbO2电极具有低成本、耐腐蚀性强等优势,广泛用于有机化合物的电催化氧化领域。然而,传统的Ti/PbO2电极在实际应用中存在电流效率低、活性层比表面积小、电催化性能弱、使用寿命短等问题。从Ti/PbO2电极发展的角度,介绍了... Ti/PbO2电极具有低成本、耐腐蚀性强等优势,广泛用于有机化合物的电催化氧化领域。然而,传统的Ti/PbO2电极在实际应用中存在电流效率低、活性层比表面积小、电催化性能弱、使用寿命短等问题。从Ti/PbO2电极发展的角度,介绍了近年来在Ti基体表面刻蚀改性和形状调节、中间层改性、表面PbO2活性层构建及掺杂改性3个方面的重要研究成果,分别聚焦基体改性增强界面结合、引入新型中间层提升导电与稳定性以及活性层掺杂改性优化催化性能。在系统梳理这些成果的基础上,从电极结构稳定性与催化活性协同增强的角度,归纳并提出了提升Ti/PbO2电极综合电化学性能:一是优化基体刻蚀参数与形状设计,构建粗糙且均匀的表面结构,强化基体与中间层的结合强度;二是筛选适配性优良的中间层材料,抑制界面反应与氧化膜生成,提升电荷传输效率;三是精准调控活性层晶型结构,合理掺杂金属或非金属元素,实现催化活性与稳定性的同步提升。最后,对Ti/PbO2电极的发展趋势进行了展望,预计未来将在电极材料改性、结构优化等方面取得关键突破,以进一步提升其电化学性能与稳定性,同时拓展其在复杂体系中的规模化应用范围,加速其工业化进程。 展开更多
关键词 Ti/PbO2电极 电催化氧化 掺杂改性 钛阳极
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