期刊文献+
任意字段
题名或关键词
题名
关键词
摘要
作者
第一作者
机构
刊名
分类号
参考文献
作者简介
基金资助
栏目信息
共找到124篇文章
< 1 2 … 7 >
每页显示 20 50 100
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
显示方式：
Preparation and photocatalytic activity of PANI/TiO2composite film 认领 引用 被引量：3
1
作者 GAO Jinzhang LI Shengying +3 位作者 YANG Wu ZHAO Guohu BO Lili SONG Li 《Rare Metals》 SCIE EI CAS 2007年第1期1-7,共7页
A PANI/TiO2 composite film deposited on the glass surface was successfully prepared using sol-gel dip-coating technique and chemical oxidation method.The film was characterized using XRD,AFM,and UV.The result showed t... A PANI/TiO2 composite film deposited on the glass surface was successfully prepared using sol-gel dip-coating technique and chemical oxidation method.The film was characterized using XRD,AFM,and UV.The result showed that the TiO2 film consists of both cuboid-shaped and anatase-phased TiO2 nanoparticles.The average grain size of TiO2 in the film was approximately 20 nm.After coating with PANI,the particle was changed into irregular spherical-shaped and the size was increased up to approximately 35 nm in diameter.UV-Vis spectroscopy analysis indicated that the coating of TiO2 with PANI would result in an enhancement of photocatalytic efficiency and an extension of the photoresponse of TiO2.The band gap of the PANI/TiO2 film was 3.18 eV.The photocatalytic property of the film was evaluated by the degradation of rhodamine-B.It was found that 67.1%and 83.2%of rhodamine-B could be degraded under sunlight and UV irradiation within 120 min using the PANI/TiO2 composite t-tim as photocatalyst. 展开更多
关键词 PANI/TiO2 film sol-gel method chemical oxidation method photocatalysis rhodamine-B
暂未订购 下载PDF
Dy3+掺杂S型BaTiO3/聚苯胺异质结的制备及光催化CO2还原性能 认领 引用
2
作者 曹铁平 李跃军 孙大伟 《精细化工》 EI CAS CSCD 北大核心 2026年第8期1827-1836,共10页
以聚丙烯腈(PAN)、苯胺(ANI)、TiCl4、Ba(NO3)2和Dy(NO3)3为原料,经静电纺丝、高温焙烧和水热反应,制备了Dy3+掺杂的BaTiO3/聚苯胺(PANI)复合纤维(DBT-P)。采用FTIR、XRD、SEM、TEM对其进行了表征。通过瞬态光电... 以聚丙烯腈(PAN)、苯胺(ANI)、TiCl4、Ba(NO3)2和Dy(NO3)3为原料,经静电纺丝、高温焙烧和水热反应,制备了Dy3+掺杂的BaTiO3/聚苯胺(PANI)复合纤维(DBT-P)。采用FTIR、XRD、SEM、TEM对其进行了表征。通过瞬态光电流和电化学阻抗谱(EIS)测试,考察了DBT-P的光电性能,探究了其光催化CO2的还原性能,并推测了其光催化机理。结果表明,S型异质结的构建和Dy3+的掺杂实现了DBT-P光催化性能的显著提升,DBT-P光催化CO2生成CH4和CO,CH4产率为11.26μmol/(g·h),是PANI催化性能的8.3倍。Dy3+掺杂在“光谱响应拓宽-电荷分离强化-活性位点激活”中发挥三重调控机制,即Dy3+取代BaTiO3晶格中的Ba2+,引入浅施主杂质能级,与PANI共轭π结构协同将光响应范围拓展至可见光区,显著增强了对太阳光的捕获能力;Dy3+掺杂促进了BaTiO3纳米颗粒在PANI纤维表面上的分散,形成了紧密异质结界面;Dy3+半径差异诱导晶格畸变,产生氧空位等缺陷作为电子陷阱,结合S型异质结内建电场,实现了光生电子与空穴的高效分离,延长了光生载流子寿命。 展开更多
关键词 Dy3+掺杂 S型异质结 BaTiO3/PANI 复合纤维 光催化CO2还原
暂未订购 下载PDF
Non‑Magnetic Bimetallic MOF‑Derived Porous Carbon‑Wrapped TiO2/ ZrTiO4 Composites for Efficient Electromagnetic Wave Absorption 认领 引用 被引量：28
3
作者 Jing Qiao Xue Zhang +7 位作者 Chang Liu Longfei Lyu Yunfei Yang Zhou Wang Lili Wu Wei Liu Fenglong Wang Jiurong Liu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2021年第5期45-60,共16页
Modern communication technologies put forward higher requirements for electromagnetic wave(EMW)absorption materials.Metal-organic framework(MOF)derivatives have been widely concerned with its diverse advantages.To bre... Modern communication technologies put forward higher requirements for electromagnetic wave(EMW)absorption materials.Metal-organic framework(MOF)derivatives have been widely concerned with its diverse advantages.To break the mindset of magneticderivative design,and make up the shortage of monometallic non-magnetic derivatives,we first try non-magnetic bimetallic MOFs derivatives to achieve efficient EMW absorption.The porous carbon-wrapped TiO2/ZrTiO4 composites derived from PCN-415(TiZr-MOFs)are qualified with a minimum reflection loss of−67.8 dB(2.16 mm,13.0 GHz),and a maximum effective absorption bandwidth of 5.9 GHz(2.70 mm).Through in-depth discussions,the synergy of enhanced interfacial polarization and other attenuation mechanisms in the composites is revealed.Therefore,this work confirms the huge potentials of nonmagnetic bimetallic MOFs derivatives in EMW absorption applications. 展开更多
关键词 Bimetallic metal-organic framework PCN-415 MOF derivatives TiO2/ZrTiO4/C composites Electromagnetic wave absorption
暂未订购 下载PDF
Preparation and characterization of ZrO_2/TiO_2 composite photocatalytic film by micro-arc oxidation 认领 引用 被引量：9
4
作者 罗强 蔡启舟 +4 位作者 李欣蔚 潘振华 李玉洁 陈喜娣 严青松 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第10期2945-2950,共6页
ZrO2/TiO2 composite photocatalytic film was produced on the pure titanium substrate using in-situ Zr（OH）4 colloidal particle by the micro-arc oxidation technique and characterized by scanning electron microscope （... ZrO2/TiO2 composite photocatalytic film was produced on the pure titanium substrate using in-situ Zr（OH）4 colloidal particle by the micro-arc oxidation technique and characterized by scanning electron microscope （SEM）, energy dispersive X-ray （EDX）, X-ray diffraction （XRD） and ultraviolet-visible （UV-Vis） spectrophotometer. The composite film shows a lamellar and porous structure which consists of anatase, futile and ZrO2 phases. The optical absorption edge of film is shifted to longer wavelength when ZrO2 is introduced to TiO2. Furthermore, the photocatalytic reaction rate constants of degradation of rhodamine B solution with ZrO2/TiO2 composite film and pure TiO2 film under ultraviolet irradiation are measured as 0.0442 and 0.0186 h 1, respectively. 展开更多
关键词 pure titanium micro-arc oxidation Zr（OH）4 colloidal particle ZrO2/TiO2 composite photocatalytic film
暂未订购 下载PDF
Enhanced thermoelectric performance of Bi2Se3/TiO2 composite 认领 引用 被引量：8
5
作者 Yu-Xi Yang Ye-Hao Wu +3 位作者 Qi Zhang Gao-Shao Cao Tie-Jun Zhu Xin-Bing Zhao 《Rare Metals》 SCIE EI CAS CSCD 2020年第8期887-894,共8页
Bi2(Te,Se)3 alloys are conventional commercial thermoelectric materials for solid-state refrigeration around room temperature.In recent years,much attention has been paid to various advanced thermoelectric composite m... Bi2(Te,Se)3 alloys are conventional commercial thermoelectric materials for solid-state refrigeration around room temperature.In recent years,much attention has been paid to various advanced thermoelectric composite materials due to the unique thermoelectric properties.In this work,Bi2Se3/TiO2 composites were prepared by hot pressing the plate-like Bi2Se3 powders coated in situ with hydrolyzed hytetabutyl-n-butyl titanate(TNBT),and therefore numerous TiO2 in micrometer size could be formed on the interface of Bi2Se3 grains.The carrier concentration in Bi2Se3 matrix is optimized subject to the addition of n-type semiconductor TiO2,contributing to a significant improved power factor.In the meantime,the lattice thermal conductivity is also suppressed due to the enhanced phonon scattering at Bi2Se3/TiO2 interface and amorphous TiO2 particles.As a consequence,a peak figure of merit(zT)of 0.41 is obtained at 525 K in Bi2Se3/15 mol%TiO2 composites,nearly 50%augment over the pristine Bi2Se3 binary compound. 展开更多
关键词 Bi2(Te,Se)3 Thermoelectric materials TiO2 Composite
暂未订购 下载PDF
Hydrogen storage properties of Mg-TiO_2 composite powder prepared by arc plasma method 认领 引用 被引量：7
6
作者 潘银成 邹建新 +1 位作者 曾小勤 丁文江 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第12期3834-3839,共6页
Mg-based Mg-TiO2 composite powder was prepared by arc plasma evaporation of the Mg＋5%TiO2 mixture followed by passivation in air. ICP, XRD and SEM techniques were used to characterize the composition, phase component... Mg-based Mg-TiO2 composite powder was prepared by arc plasma evaporation of the Mg＋5%TiO2 mixture followed by passivation in air. ICP, XRD and SEM techniques were used to characterize the composition, phase components and microstructure of the composite powder. The hydrogen sorption properties of the composite powder were investigated by DSC and PCT techniques. According to the data from PCT measurements, the hydrogenation enthalpy and entropy changes of the composite powder are calculated to be-71.5 kJ/mol and-130.1 J/（K·mol）, respectively. Besides, the hydrogenation activation energy is determined to be 77.2 kJ/ mol. The results indicate that TiO2 added into Mg by arc plasma method can act as a catalyst to improve the hydrogen sorption kinetic properties of Mg. 展开更多
关键词 nanostructured composite Mg TiO2 hydrogen storage arc plasma method
暂未订购 下载PDF
Photocatalytic activity and kinetics for acid yellow degradation over surface composites of TiO_2-coated activated carbon under different photocatalytic conditions 认领 引用 被引量：4
7
作者 曾孟雄 李佑稷 +2 位作者 马明远 陈伟 李雷勇 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2013年第4期1019-1027,共9页
TiO2-coated activated carbon surface （TAs） composites were prepared by a sol-gel method with supercritical pretreatment. The photocatalytic degradation of acid yellow （AY） was investigated under UV radiation to es... TiO2-coated activated carbon surface （TAs） composites were prepared by a sol-gel method with supercritical pretreatment. The photocatalytic degradation of acid yellow （AY） was investigated under UV radiation to estimate activity of catalysts and determine the kinetics. And the effects of parameters including the initial concentration of AY, light intensity and TiO2 content in catalysts were examined. The results indicate that TAs has a higher efficiency in decomposition of AY than P25, pure TiO2 particles as well as the mixture of TiO2 powder and active carbon. The photocatalytic degradation rate is found to follow the pseudo-first order kinetics with respect to the AY concentration. The new kinetic model fairly resembles the classic Langmuir-Hinshelwood equation, and the rate constant is proportional to the square root of the light intensity in a wide range. However, its absorption performance depends on the surface areas of catalysts. The model fits quite well with the experimental data and elucidates phenomena about the effects of the TiO2 content in TAs on the degradation rate. 展开更多
关键词 photocatalysis TiO2-coated activated carbon acid yellow composite catalyst
暂未订购 下载PDF
TiO2/polyaniline composites:An efficient photocatalyst for the degradation of methylene blue under natural light 认领 引用 被引量：13
8
作者 Fang Wang Shi Xiong Min 《Chinese Chemical Letters》 SCIE CAS 2007年第10期1273-1277,共5页
Polyaniline(PAn)sensitized nanocrystalline TiO2 composites(TiO2/PAn)were successfully prepared and used as an efficient photocatalyst for the degradation of dye methylene blue(MB).The results showed that PAn was able ... Polyaniline(PAn)sensitized nanocrystalline TiO2 composites(TiO2/PAn)were successfully prepared and used as an efficient photocatalyst for the degradation of dye methylene blue(MB).The results showed that PAn was able to sensitize TiO2 efficiently and the composite photocatalyst could be activated by absorbing both the ultraviolet and visible light(λ:190~800 nm),whereas pure TiO2 absorbed ultraviolet light only(λ〈380 nm).Under the irradiation of natural light,MB could be degraded more efficiently on the TiO2/PAn composites than on the TiO2 Furthermore,it could be easily separated from the solution by simple sedimentation. 展开更多
关键词 TiO2/PAn Composite photocatalyst Methylene blue Degradation Natural light
暂未订购 下载PDF
Corrosion Resistance of Sintered NdFeB Permanent Magnet With Ni-P/TiO_2 Composite Film 认领 引用 被引量：20
9
作者 SONG Lai-zhou YANG Zhi-yong 《Journal of Iron and Steel Research International》 SCIE CAS 2009年第3期89-94,共6页
The Ni-P/TiO2 composite film on sintered NdFeB permanent magnet was investigated by X-ray diffraction （XRD）,environmental scanning electron microscopy （ESEM）,and energy dispersive X-ray spectrometer （EDX）. The c... The Ni-P/TiO2 composite film on sintered NdFeB permanent magnet was investigated by X-ray diffraction （XRD）,environmental scanning electron microscopy （ESEM）,and energy dispersive X-ray spectrometer （EDX）. The corrosion resistance of Ni-P/TiO2 film coated on NdFeB magnet,in 0.5 mol/L NaCl solution,was studied by potentiodynamic polarization,salt spray test and electrochemical impedance spectroscopy （EIS） techniques. The self-corrosion current density （icorr） and the polarization resistance （Rp） of Ni-P/TiO2 film are 0.22 μA/cm2 （about 14% of that of Ni-P coating）,and 120 kΩ·cm2 （about 2 times of that of Ni-P coating）,respectively. The anti-salt spray time of Ni-P/TiO2 film is about 2.5 times of that of the Ni-P coating. The results indicate that Ni-P/TiO2 film has a better corrosion resistance than Ni-P coating,and the composite film increases the corrosion resistance of NdFeB magnet markedly. 展开更多
关键词 sintered NdFeB permanent magnet Ni-P/TiO2 composite film sodium chloride solution corrosion resistance
暂未订购 下载PDF
PREPARATION AND CORROSION RESISTANCE OF NiP/TiO_2 COMPOSITE FILM ON CARBON STEEL IN SULFURIC ACID SOLUTION 认领 引用 被引量：5
10
作者 L.Z. Song S.Z. Song J. Zhao 《Acta Metallurgica Sinica(English Letters)》 EI CAS 2006年第2期117-123,共7页
A NiP/TiO2 composite film on carbon steel was prepared by electroless plating and sol-gel composite process. An artificial neural network was applied to optimize the prepared condition of the composite film. Corrosion... A NiP/TiO2 composite film on carbon steel was prepared by electroless plating and sol-gel composite process. An artificial neural network was applied to optimize the prepared condition of the composite film. Corrosion behavior of the NiP/TiO2 composite film was investigated by polarization resistance measurement, anode polarization, ESEM （environmental scanning electron microscopy） and EIS （electrochemical impedance spectroscopy） measurements. Results showed that the NiP/ TiO2 composite film has a good corrosion resistance in 0.5mol/L H2SO4 solution. The element valence of the composite film was characterized by XPS （X-ray photoelectron spectroscopy） spectrum, and an anticorrosion mechanism of the composite film was discussed. 展开更多
关键词 electroless plating and sol-gel composite process artificial neural network NiP/TiO2 composite film corrosion resistance
暂未订购 下载PDF
A Novel High Active TiO_2/AC Composite Photocatalyst Prepared by Acid Catalyzed Hydrothermal Method 认领 引用 被引量：2
11
作者 Shou Xin LIU Xiao Yun CHEN +1 位作者 Xi CHEN Cheng Lin SUN 《Chinese Chemical Letters》 SCIE CAS 2006年第4期529-532,共4页
A high active novel TiO2/AC composite photocatalyst was prepared and used for phenol degradation. It was much more active than P-25 and exhibiting good decantability, less deactivation after several runs and less sens... A high active novel TiO2/AC composite photocatalyst was prepared and used for phenol degradation. It was much more active than P-25 and exhibiting good decantability, less deactivation after several runs and less sensitive to pH change. Diffuse reflectance spectra （DRS） revealed that the electronic change in TiO2 did not occur by the addition of AC. Results of SEM and XRD suggested that better TiO2 distribution can be achieved when optimal AC content was adopted. The performance of the prepared TiO2/5AC catalyst revealed great practical potential in wastewater treatment field. 展开更多
关键词 TiO2 activated carbon composite photocatalyst practical efficiency.
暂未订购 下载PDF
Preparation of NaYF_4:Er3+/TiO_2 composite and up-conversion luminescence properties under visible light excitation 认领 引用 被引量：3
12
作者 叶岩溪 胡晓云 +6 位作者 闫志云 刘恩周 樊君 张德恺 苗慧 商毅博 杨娟 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第8期449-453,共5页
The up-conversion luminescence composite NaYF4：Er3＋/TiO2 is prepared using the sol-gel method. The specimen has good crystallinity and two shapes, i.e., viereck and round, while the sizes of viereck and round partic... The up-conversion luminescence composite NaYF4：Er3＋/TiO2 is prepared using the sol-gel method. The specimen has good crystallinity and two shapes, i.e., viereck and round, while the sizes of viereck and round particles are both micron-sized. The TiO2 has an anatase structure, while the NaYF4 has a hexagonal phase, which can be hardly obtained through the common sol-gel method. Due to the big particle size and the high crystallinity of pure NaYF4： Er3＋, the composite has a small specific surface area that is less than Degussa P25 TiO2. The NaYF4：Er3＋/TiO2 composite shows several emission peaks at 211, 237, and 251 nm under the excitation of 388 nm, at 395 nm and 411 nm under the excitation of 500 nm, and at 467, 481,492, and 508 nm under the excitation of 570 nm. 展开更多
关键词 ~p-conversion luminescence NaYF4：Er3＋/TiO2 composite excitation of visible light
暂未订购 下载PDF
Morphology and conductivity of in-situ PEO-LiClO_4-TiO_2 composite polymer electrolyte 认领 引用 被引量：3
13
作者 潘春跃 冯庆 +2 位作者 王丽君 张倩 巢猛 《Journal of Central South University of Technology》 2007年第3期348-352,共5页
PEO-LiClO4-TiO2 composite polymer electrolyte films were prepared. TiO2 was formed directly in matrix by hydrolysis and condensation reaction of tetrabutyl titanate. The crystallinity, morphology and ionic conductivit... PEO-LiClO4-TiO2 composite polymer electrolyte films were prepared. TiO2 was formed directly in matrix by hydrolysis and condensation reaction of tetrabutyl titanate. The crystallinity, morphology and ionic conductivity of composite polymer electrolyte films were examined by differential scanning calorimetry, scanning electron microscopy, atom force microscopy and alternating current impedance spectroscopy, respectively. The glass transition temperature and the crystallinity of composite polymer electrolytes are decreased compared with those of PEO-LiClO4 polymer electrolyte film. The results show that TiO2 particles are uniformly dispersed in PEO-LiClO4-5%TiO2 composite polymer electrolyte film. The maximal conductivity of 5.5×10、5 Scm at 20 ℃ of PEO-LiClO4-TiO2 film is obtained at 5% mass fraction of TiO2. 展开更多
关键词 polyethylene oxide （PEO） TiO2 composite polymer electrolyte in-situ composite conductivity
暂未订购 下载PDF
Fabrication of Bi_2O_3/TiO_2nanocomposites and their applications to the degradation of pollutants in air and water under visible-light 认领 引用 被引量：8
14
作者 Ashok Kumar Chakraborty Md Emran Hossain +1 位作者 Md Masudur Rhaman K M A Sobahan 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第2期458-465,共8页
A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light （λ≥ 420 nm） was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was emplo... A nanoheterojunction composite photocatalyst Bi2O3/TiO2 working under visible-light （λ≥ 420 nm） was prepared by combining two semiconductors Bi2O3 and TiO2 varying the Bi2O3/TiO2 molar ratio. Maleic acid was employed as an organic binder to unite Bi2O3 and TiO2 nanoparticles. The SEM, TEM, XRD and diffuse reflectance spectra were utilized to characterize the prepared Bi2O3/TiO2 nanoheterojunction. The nanocomposite exhibited unusual high photocatalytic activity in decomposing 2-propanol in gas phase and phenol in aqueous phase and, evolution of CO2 under visible light irradiation while the end members exhibited low photocatalytic activity. The composite was optimized to 5 mol% Bi2O3/TiO2. The remarkable high photocatalytic efficiency originates from the unique relative energy band position of Bi2O3 and TiO2 as well as the absorption of visible light by Bi2O3. 展开更多
关键词 nanoheterojunction Bi2O3/TiO2 composite photocatalyst pollutants visible-light
暂未订购 下载PDF
Grain Size and Wettability of TiO_2/SiO_2 Photocatalytic Composite Thin Filing 认领 引用 被引量：11
15
作者 Jiaguo Yu, Xiujian Zhao, Jimmy C Yu, Jun Lin (State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China Deportment of Chemised The Chinese University of Hong Kong, Hong Kong, 《Rare Metals》 SCIE EI CAS 2001年第2期81-86,共6页
The uniform transparent TiO2/SiO2 photocatalytic composite thin films are prepared by sol-gel method on the soda lime glass substrates, and characterized by UV-visible spectroscopy, X-ray diffraction (XRD), transmissi... The uniform transparent TiO2/SiO2 photocatalytic composite thin films are prepared by sol-gel method on the soda lime glass substrates, and characterized by UV-visible spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), BET surface area, FTIR spectroscopy and X-ray photoelectron spectroscopy (XPS). It was found that the addition of SiO2 to TiO2 thin films can suppress the grain growth of TiO2 crystal, increase the hydroxyl content on the surface of TiO2 films, lower the contact angle for water on TiO, films and enhance the hydrophilic property of TiO2 films. The super-hydrophilic TiO2/SiO2 photocatalytic composite thin films with the contact angle of 0((o) under bar) are obtained by the addition of 10%-20% SiO2 in mole fraction. 展开更多
关键词 sol-gel method TiO2/SiO2 photocatalytic composite thin films grain size wettability
暂未订购 下载PDF
Preparation of TiO2 Nanocrystals/Graphene Composite and Its Photocatalytic Performance 认领 引用
16
作者 Ling-juan Deng Yuan-zi Gu +1 位作者 Wei-xia Xu Zhan-ying Ma 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2014年第3期321-326,共6页
TiO2 nanocrystals/graphene （TiO2/GR） composite are prepared by combining flocculation and hydrothermal reduction technology using graphite oxide and TiO2 colloid as precursors. The obtained materials are examined by... TiO2 nanocrystals/graphene （TiO2/GR） composite are prepared by combining flocculation and hydrothermal reduction technology using graphite oxide and TiO2 colloid as precursors. The obtained materials are examined by scanning electron microscopy, transition electron microscopy, X-ray diffraction, N2 adsorption desorption, and ultraviolet-visible diffuse spectroscopy. The results suggest that the presence of TiO2 nanocrystals with diameter of about 15 nm prevents GR nanosheets from agglomeration. Owing to the uniform distribution of TiO2 nanocrystals on the GR nanosheets, TiO2/GR composite exhibits stronger light absorption in the visible region, higher adsorption capacity to methylene blue and higher efficiency of charge separation and transportation compared with pure TiO2. Moreover, the TiO2/GR composite with a GR content of 30% shows higher photocatalytic removal efficiency of MB from water than that of pure TiO2 and commercial P25 under both UV and sunlight irradiation. 展开更多
关键词 TiO2 nanocrystals/graphene composite Photocatalyst Chemical adsorptivity Extended light absorption Efficient charge separation
暂未订购 下载PDF
Photocatalytic and Thermal Insulating Performances of Fiber Reinforced Hierarchical TiO_2/SiO_2 Xerogel Composites Synthesized by Ambient Drying Route 认领 引用
17
作者 徐海珣 赵善宇 +2 位作者 郑猛 贾佳佳 朱平华 《Journal of Donghua University(English Edition)》 CAS 2017年第4期570-576,共7页
Silica( SiO_2) based aerogel/xerogel materials have been received ever-growing attentions for versatile applications. However,the widespread applications are narrowed by the inert properties,fragile and brittle nature... Silica( SiO_2) based aerogel/xerogel materials have been received ever-growing attentions for versatile applications. However,the widespread applications are narrowed by the inert properties,fragile and brittle natureof silica materials and cumbersome preparation processes. In this paper,titania( TiO_2) was introduced into SiO_2 matrix to form photocatalytic hybrid gels. The TiO_2/SiO_2 composites were then reinforced by the impregnation of various fibrillary reinforcements,such as glass,mullite mineral and ceramic fibers. The properties of the composites were studied systematically in terms of fiberstability,microstructure,chemical interaction and thermal conductivity. The final xerogel composites displayed improved monolithic geometry,satisfied thermal conductivity(0. 09-0. 25 W·m-1·K-1) and optimized photocatalytic performance(85% removal of model pollutant of methyl orange( Mo)),which could be expected to be a feasible route to multi-functional building facades in the future. 展开更多
关键词 titania-silica（TiO2/SiO2） composite photocatalytic thermal conductivity fiber reinforcement
暂未订购 下载PDF
In-situ Preparation of Al/TiAl_3(P) Composite by Direct Reaction between Molten Al and TiO_2 Powder 认领 引用
18
作者 Yuyong CHEN Ziyong CHEN Qu SHU and Geying AN 《Journal of Materials Science & Technology》 SCIE EI CAS 1998年第6期569-570,共2页
TiAl3 particle reinforced pure Al composite has been made by direct reaction among molten Al, TiO2 and a flux. The composite exhibits high Synthetically properties. The strength and hardness are higher than those of p... TiAl3 particle reinforced pure Al composite has been made by direct reaction among molten Al, TiO2 and a flux. The composite exhibits high Synthetically properties. The strength and hardness are higher than those of pure Al matrix by 71.5% and 134% respectively However, the elongation is 20.36%, slightly lower than that of the Al matrix. 展开更多
关键词 TiO TiAl In-situ Preparation of Al/TiAl3 Composite by Direct Reaction between Molten Al and TiO2 Powder
暂未订购 下载PDF
Analysis and characterization of microstructures of a TiO_2/bamboo charcoal composite and modified poplar veneer 认领 引用
19
作者 CHENG Da-li JIANG Shen-xue ZHANG Qi-sheng 《Forestry Studies in China》 2012年第3期240-245,共6页
A type of TiO/bamboo charcoal composite made by a dip-dry method was loaded onto wood veneer with a vacuum- pressure method in order to prepare modified poplar veneer. The pore structure parameters and surface morphol... A type of TiO/bamboo charcoal composite made by a dip-dry method was loaded onto wood veneer with a vacuum- pressure method in order to prepare modified poplar veneer. The pore structure parameters and surface morphology of the TiO2/ bamboo charcoal composite were determined and analyzed by means of a porosimetry analyzer and SEM. The results show that the surface morphology of the composite does not change after being loaded with nano TiO2. However, its specific surface area （359.814 m^2·g^-1）, pore volume （0.317 cm^3.g^-1） and average pore diameter （3.526 nm） increased; particularly the cumulative volume of pores was increased by 65.83%. In addition, the distribution range of the pores was wider than that of the bamboo charcoal. Combining the SEM of unmodified and modified poplar veneer, the results of X-ray photoelectron spectroscopy revealed that actually some TiOz compounds, i.e., 4.08%, are imbedded in the modified poplar veneer. 展开更多
关键词 bamboo charcoal titanium dioxide TiO2/bamboo charcoal composite SEM XPS
暂未订购 下载PDF
Synthesis of graphene/tourmaline/TiO_2 composites with enhanced activity for photocatalytic degradation of 2-propanol 认领 引用 被引量：8
20
作者 Lili Yin Ming Zhao +2 位作者 Huilin Hu Jinhua Ye Defa Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2017年第8期1307-1314,共8页
We report the construction of a grapheneourmaline/TiO2(G/T/TiO2)composite system with enhanced charge‐carrier separation,and therefore enhanced photocatalytic properties,based on tailoring the surface‐charged state ... We report the construction of a grapheneourmaline/TiO2(G/T/TiO2)composite system with enhanced charge‐carrier separation,and therefore enhanced photocatalytic properties,based on tailoring the surface‐charged state of graphene and/or by introducing an external electric field arising from tourmaline.A simple two‐step hydrothermal method was used to synthesize G/T/TiO2composites and poly(diallyldimethylammonium chloride)‐G/T/TiO2composites.In the photocatalytic degradation of2‐propanol(IPA),the catalytic activity of the composite containing negatively charged graphene was higher than of the composite containing positively charged graphene.The highest acetone evolution rate(223?mol/h)was achieved using the ternary composite with the optimum composition,i.e.,G0.5/T5/TiO2(0.5wt%graphene and5wt%tourmaline).The involvement of tourmaline and graphene in the composite is believed to facilitate the separation and transportation of electrons and holes photogenerated in TiO2.This synergetic effect could account for the enhanced photocatalytic activity of the G/T/TiO2composite.A mechanistic study indicated that O2??radicals and holes were the main reactive oxygen species in photocatalytic degradation of IPA. 展开更多
关键词 Photocatalysis Graphene Tourmaline TiO2 Composite 2‐Propanol Degradation
暂未订购 下载PDF
已选0条
引用分析
参考文献
引证文献
 统计分析
检索结果
已选文献
上一页 1 2 … 7 下一页 到第 页
在线咨询 使用帮助 返回顶部 意见反馈