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Simulated-sunlight-activated photocatalysis of Methylene Blue using cerium-doped SiO_2/TiO_2 nanostructured fibers 认领 引用 被引量：11
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作者 Yu Liu Hongbing Yu +5 位作者 Zhenning Lv Sihui Zhan Jiangyao Yang Xinhong Peng Yixuan Ren Xiaoyan Wu 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2012年第10期1867-1875,共9页
Cerium-doped SiO2/TiO2 nanostructured fibers were fabricated by electrospinning technology. The prepared fibers were characterized by thermogravimetric analysis （TGA）, scanning electron microscopy （SEM）, X-ray dif... Cerium-doped SiO2/TiO2 nanostructured fibers were fabricated by electrospinning technology. The prepared fibers were characterized by thermogravimetric analysis （TGA）, scanning electron microscopy （SEM）, X-ray diffraction （XRD） and Fourier transform infrared spectroscopy （FT-IR）. Using the fibers as catalysts, photoeatalytic degradation of Methylene Blue （MB） aqueous solution was carded out under simulated sunlight. The 0.2% Ce doping proved to be the optimal concentration for the doping of TiO2/SiO2, compared to other Ce-doped molar concentrations. The 0.2% Ce-doped SiOdTiO2 fibers exhibited higher photocatalytic activity than industrial Degussa P25 and the samples doped with only Ce or SIO2. The reasons for improving the photocatalytic activity were also discussed. Several operational parameters were studied, which showed that the photocatalytic efficiency of MB was influenced by parameters such as the initial dye concentration, the initial pH, inorganic anions, and so on. In addition, the influences of an electron acceptor and a radical scavenger suggested that OH was the dominant photooxidant during the photocatalytic process. The reuse evaluation of the fibers indicated that their photocatalytic activity had good stability. 展开更多
关键词 photocatalysis SiO2/TiO2 cerium nanostructured fibers Methylene Blue
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Highly efficient Zr doped-TiO_2/glass fiber photocatalyst and its performance in formaldehyde removal under visible light 认领 引用 被引量：7
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作者 Chao Huang Yaping Ding +3 位作者 Yingwen Chen Peiwen Li Shemin Zhu Shubao Shen 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2017年第10期61-69,共9页
Zr-doped-TiO2 loaded glass fiber（ZT/GF） composite photocatalysts with different Zr/Ti ratios were prepared with a sol–gel process. Zr4＋can replace Ti4＋in the TiO2 lattice, which is conducive to forming the anatas... Zr-doped-TiO2 loaded glass fiber（ZT/GF） composite photocatalysts with different Zr/Ti ratios were prepared with a sol–gel process. Zr4＋can replace Ti4＋in the TiO2 lattice, which is conducive to forming the anatase phase and reducing the calcination temperature. The glass fiber carrier was responsible for better dispersion and loading of Zr-doped-TiO2 particles, improving the applicability of the Zr-doped-TiO2. The ZT/GF photocatalysts were characterized by X-ray diffraction（XRD）, scanning electron microscope（SEM）, Fourier transform infrared spectroscopy（FT-IR）, ultraviolet–visible spectroscopy（UV–vis） and Barrett–Joyner–Halenda（BJH）. The performance of photocatalysts with different loading was evaluated in formaldehyde degradation under visible light at room temperature. ZT/GF0.2exhibited the highest activity, with a formaldehyde removal rate as high as 95.14% being observed, which is better than that of the photocatalyst particles alone. The stability of the catalyst was also tested, and ZT/GF exhibited excellent catalytic performance with 94.38%removal efficiency, even after seven uses. 展开更多
关键词 TiO2 Zr Photocatalyst Formaldehyde Glass fiber
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Preparation and Photocatalytic Activity of Ce, H3PW12O40 co-doped TiO2 Hollow Fibers 认领 引用 被引量：3
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作者 Shu-hua Yao Shuang Chen Zhong-liang Shi 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2014年第3期343-349,共7页
A series of Ce, H3PW12O40 co-doped TiO2 hollow fibers photocatalysts have been prepared by sol-gel method using ammonium ceric nitrate, H3PW12O40 and tetrabutyltitanate as precursors and cotton fibers as template, fol... A series of Ce, H3PW12O40 co-doped TiO2 hollow fibers photocatalysts have been prepared by sol-gel method using ammonium ceric nitrate, H3PW12O40 and tetrabutyltitanate as precursors and cotton fibers as template, followed by calcination at 500 ℃ in N2 atmosphere for 2 h. Scanning electron microscopy, X-ray diffraction, nitrogen adsorption-desorption mea- surements, and UV-Vis spectroscopy are employed to characterize the morphology, crystal structure, surface structure, and optical absorption properties of the samples. The photo- catalytic performance of the samples has been studied by photodegradation phenol in water under UV and visible light irradiation. The results show that the TiO2 fiber materials have hollow structures, and the co-doped TiO2 hollow fibers exhibit higher photocatalytic activities for the degradation of phenol than un-doped, single-doped TiO2 hollow fibers under UV and visible light. In addition, the recyclability of co-doped TiO2 fibers is also confirmed that the TiO2 fiber retains ca. 90% of its activity after being used four times. It is shown that the co-doped TiO2 fibers can be activated by visible light and may be potentially applied to the treatment of water contaminated by organic pollutants. The synergistic effect of Ce and H3PW12O40 co-doping plays an important role in improving the photocatalytic activity. 展开更多
关键词 TiO2 hollow fibers Ce and H3PW12O40 co-doping Photocatalytic activity Template method Phenol
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Preparation and Characterization of Three-dimensional Photocatalyst——TiO_2 Particulate Film Immobilized on Activated Carbon Fibers 认领 引用 被引量：1
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作者 傅平丰 栾勇 +2 位作者 戴学刚 张建强 张安华 《过程工程学报》 EI CAS 北大核心 2006年第3期482-486,共5页
A novel three-dimensional photocatalyst, TiO2 particulate film immobilized on activated carbon fibers （TiOE/ACFs）, was prepared by liquid phase deposition. The photocatalyst was characterized by SEM, XRD, BET surfac... A novel three-dimensional photocatalyst, TiO2 particulate film immobilized on activated carbon fibers （TiOE/ACFs）, was prepared by liquid phase deposition. The photocatalyst was characterized by SEM, XRD, BET surface area and photodegradation of methylene blue solution. TiO2 particulate film, with a thickness of nearly 200 nm and grain sizes of 30-50 nm, was deposited on almost each carbon fiber. The inner space between adjacent fibers remained as unmodified ACFs, therefore, both UV illumination and polluted solutions were allowed to pass through the felt-form photocatalyst to form a three-dimensional environment for photocatalytic reactions. With BET surface areas of 400-600 m^2/g, the TiOE/ACFs exhibited an enhanced adsorption of pollutants for photocatalysis. Comparative degradations indicated that photocatalytic activity of the TiOE/ACFs was slightly higher than that of Degussa P-25 TiO2. Two special properties, the three-dimensional structure and combined effects of ACFs＇ adsorption and titania＇s photodegradation, made contribution to high photocatalytic activity. Additionally, the TiOE/ACFs exhibited high stability and potentially application for practical usage. 展开更多
关键词 liquid phase deposition TiO2 particulate film activated carbon fibers three-dimensional structure photocatalytic activity
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Preparation of TiO_2 Nanoparticles Coated Cotton Fibers at Low Temperature and Their Photocatalytic Activity 认领 引用
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作者 石中亮 卢昌岁 +2 位作者 王海波 潘永娥 姚淑华 《过程工程学报》 CAS 北大核心 2010年第4期809-814,共6页
TiO_2 nanoparticles coated cotton fiber composite was successfully prepared by using a sol-gel method at low temperature(about 100℃) using tetrabutyl-titanate [Ti(OBu)_4] as raw material.The preparation of the TiO_2 ... TiO_2 nanoparticles coated cotton fiber composite was successfully prepared by using a sol-gel method at low temperature(about 100℃) using tetrabutyl-titanate [Ti(OBu)_4] as raw material.The preparation of the TiO_2 colloid and the composite were described.The properties of resulting materials were characterized by SEM and XRD,the photocatalytic degradation performance was tested using methylene blue(MB) as the target pollutant in aqueous solution.The results showed that the amorphous TiO_2 nanoparticles were distributed evenly on the outer surfaces of cotton fibers,which shows efficient photocatalytic properties when exposed to UV light,the degradation rate of MB reached 95.35% under the conditions of catalyst dosage 2.5 g/L,MB concentration 50 mg/L,irradiation time 120 min,and pH 10,and the photocatalytic activity of TiO_2/cotton fibers remained above 90% of its activity as-prepared after being used four times,the degradation rate of MB could reach 88.78% when irradiation time was 120 min.The photocatalytic degradation of MB could be properly described by the first-order kinetic law.By comparison of the removal rates of MB with and without UV light,it could be affirmed that the disappearance of MB was due to photodegradation rather than adsorption on cotton fibers. 展开更多
关键词 TiO2 nanoparticles cotton fibers photocatalysis methylene blue
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Photocatalytic and Thermal Insulating Performances of Fiber Reinforced Hierarchical TiO_2/SiO_2 Xerogel Composites Synthesized by Ambient Drying Route 认领 引用
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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
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Construction of Hierarchical Nanostructured N-doped TiO2 Immobilized Activated Carbon Fiber Porous Composites for Toluene Removal 认领 引用 被引量：3
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作者 Li Yuwei Li Wei +3 位作者 Li Meng Liu Fang Qi Xuejin Wang Yongqiang 《China Petroleum Processing & Petrochemical Technology》 CAS 2020年第3期33-42,共10页
The hierarchical nanostructured N-doped TiO2 immobilized activated carbon fiber(N-TiO2/ACF)porous composites are fabricated to removal dynamic toluene gas.The results show that nitrogen ions doping and ACF modificatio... The hierarchical nanostructured N-doped TiO2 immobilized activated carbon fiber(N-TiO2/ACF)porous composites are fabricated to removal dynamic toluene gas.The results show that nitrogen ions doping and ACF modification can decrease the band gap of TiO2,leading to red shift toward visible light region.Interestingly,N-TiO2/ACF exhibits strongly synergistic effect owing to high surface area,good crystallinity,enhanced bandgap structure and light harvesting.The toluene removal rate of N-TiO2/ACF composites is 2.29 times higher than that of TiO2.The N-TiO2/ACF for toluene degradation followed the Langmuir-Hinshelwood kinetic model,and the rate constant is enhanced 8 times compared with TiO2.The possible photodegradation pathway and mechanisms are proposed. 展开更多
关键词 activated carbon fiber TiO2 nitrogen doping photodegradation dynamic toluene
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Photocatalytic Degradation of Methylene Blue with Side-glowing Optical Fiber Deliverying Visible Light 认领 引用 被引量：2
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作者 储金宇 仲蕾 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2012年第5期895-899,共5页
The side-glowing optical fibers (SOFs) were chosen as the conducting medium of endogenous light; and 20 mg·L-1 methylene blue was chosen as the target to be degraded. The SOF is made up of quartz core with a sili... The side-glowing optical fibers (SOFs) were chosen as the conducting medium of endogenous light; and 20 mg·L-1 methylene blue was chosen as the target to be degraded. The SOF is made up of quartz core with a silicon cladding, which can emit light through side surface more uniformly and transmit light for longer distance to avoid attenuation of light by liquid medium. The filament lamp was chosen as visible light source. Different reaction conditions, such as the presence of optical fiber or not, the quantity of SOF, light irradiation intensity were tested by measuring the methylene blue degradation of methylene blue. The results show that suitable reaction conditions were 1.167 g·L-1 Ag + /TiO 2 with 7% (by mass) of Ag + doped in TiO 2 , and 500 roots of SOF (30 cm length in solution). The photocatalytic degradation efficiency under 300W lamp irradiation for 8h was about 97%. And the photocatalytic degradation efficiency of methylene blue degradation was proportional to SOF quantity, light irradiation intensity and catalytic dosage within a certain range. Compared with general UV and visible light SOFs could save a huge amount of energy and cost, in the potential applications in dealing with organic pollutants on a large scale. 展开更多
关键词 side-glowing optical fiber visible light photocatalysis Ag＋/TiO2 catalyst methylene blue
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Low Temperature Coating of Anatase Thin Films on Silica Glass Fibers by Liquid Phase Deposition 认领 引用 被引量：2
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作者 李顺 刘家臣 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2007年第1期136-139,共4页
Uniform crystalline TiO2 thin films were coated on silica glass fibers by liquid phase deposition from aqueous solution of ammonium hexafluorotitanate at low temperature. TiO2 thin films and nanopowders were prepared ... Uniform crystalline TiO2 thin films were coated on silica glass fibers by liquid phase deposition from aqueous solution of ammonium hexafluorotitanate at low temperature. TiO2 thin films and nanopowders were prepared by adding H3BO3 into （NH4）2TiF6 solution supersaturated with anatase nano-crystalline TiO2 at 40 ℃. The effects of the deposition conditions on the surface morphology, section morphology, thickness of the deposited TiO2 thin films were investigated. The results indicate that the growth rate and particle size of the thin films were controlled by both the deposition conditions and the amount of anatase nano-crystalline TiO2. 展开更多
关键词 TiO2 thin film silica glass fiber liquid phase deposition
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高强紫外线辐照对TiO2改性涤纶纤维结构和力学性能的影响 认领 引用 被引量：1
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作者 陈天宇 张辉 +2 位作者 陈文豆 武海良 韩惠民 《丝绸》 CAS CSCD 北大核心 2020年第11期1-7,共7页
为探究高强度紫外线对涤纶造成光损伤的原因及TiO 2涂层对涤纶的防护机理,文章采用水热法在涤纶纤维表面沉积纳米TiO 2颗粒,以化学镀银涤纶纤维作为比较,借助扫描电子显微镜、红外光谱和X射线衍射技术对纤维表面形貌、分子结构、结晶和... 为探究高强度紫外线对涤纶造成光损伤的原因及TiO 2涂层对涤纶的防护机理,文章采用水热法在涤纶纤维表面沉积纳米TiO 2颗粒,以化学镀银涤纶纤维作为比较,借助扫描电子显微镜、红外光谱和X射线衍射技术对纤维表面形貌、分子结构、结晶和取向结构进行了研究,测定高强度紫外线辐照下的纤维力学拉伸性能。结果表明:高强度紫外线辐照短时间内就会引起涤纶和化学镀银涤纶纤维的表观晶粒尺寸增大,结晶指数减小,从而导致力学性能下降,而负载锐钛矿型纳米TiO 2的涤纶纤维抵抗高强度紫外线辐照时间会显著延长。 展开更多
关键词 涤纶纤维 二氧化钛(TiO 2) 化学镀银 中波紫外线 力学性能
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纳米TiO_2/丝素复合膜整理对织物上染率的影响 认领 引用 被引量：2
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作者 夏友谊 陈建勇 《印染》 CAS 北大核心 2004年第15期4-6,共3页
将粘胶织物和棉织物作为被整理材料 ,研究经纳米TiO2 /丝素复合膜整理前后织物上染率的变化 ,并借助于AFM (原子力显微镜 )观察被整理后织物表面的形状结构。试验结果表明 ,经复合膜整理后 ,织物表面的纳米TiO2 分散均匀、粒径较小 。
关键词 整理 丝朊 二氧化钛 纳米技术 上染率 织物 粘胶纤维 棉纤维
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构筑TiO2/碳纤维多级增强树脂基复合材料研究 认领 引用 被引量：3
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作者 费杰 李盟 郑欣慧 《陕西科技大学学报》 2020年第6期105-111,145,共7页
为了改善碳纤维/酚醛复合材料的界面性能,可以通过溶胶-凝胶法和水热法在碳纤维与树脂之间引入了TiO 2薄膜层、纳米线层,来实现多级增强.本文系统研究了不同厚度的薄膜层对复合材料力学性能和摩擦学性能的影响.结果表明,当溶胶-凝胶法涂... 为了改善碳纤维/酚醛复合材料的界面性能,可以通过溶胶-凝胶法和水热法在碳纤维与树脂之间引入了TiO 2薄膜层、纳米线层,来实现多级增强.本文系统研究了不同厚度的薄膜层对复合材料力学性能和摩擦学性能的影响.结果表明,当溶胶-凝胶法涂覆3次并水热生长纳米线时,薄膜层的厚度为0.1μm时,复合材料具有最大的弯曲强度,较原始样品增加了32.8%.而且,其平均摩擦系数为0.17,磨损率最小且相较于原始样品降低了39.8%. 展开更多
关键词 碳纤维 TiO 2薄膜层 弯曲强度 摩擦系数 磨损率
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聚3,4-乙烯二氧噻吩/碳纳米管/TiO2电化学传感器构建及其在细胞检测中的应用 认领 引用
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作者 厉婷 徐加泉 黄卫华 《分析科学学报》 CAS CSCD 北大核心 2020年第5期701-709,共9页
本文结合TiO2优良的光催化降解性能,以及电化学传感材料PEDOT/PSS和CNTs的优良电化学性能及抗污染性能,采用一种直接拉制技术,简便、快捷地制备了PEDOT/CNTs/TiO2复合纤维,其长度可达10cm,直径最小可至3μm。在此基础上,分别构建了兼具... 本文结合TiO2优良的光催化降解性能,以及电化学传感材料PEDOT/PSS和CNTs的优良电化学性能及抗污染性能,采用一种直接拉制技术,简便、快捷地制备了PEDOT/CNTs/TiO2复合纤维,其长度可达10cm,直径最小可至3μm。在此基础上,分别构建了兼具抗污染性能和光致清洁性能的平面微米线电极及单根微米线电极,用于监测内皮细胞释放NO。结果显示,所制电极具有良好的电化学性能,对NO的检出限可达4nmol/mL;在培养基中浸泡34h后,其电化学性能无明显变化,表现出良好的抗污染性能;在彻底污染后(无电化学响应),经紫外光照30min后,其电化学性能可恢复至初始的30%,表现出一定的光致清洁能力。 展开更多
关键词 电化学传感器 光致清洁 PEDOT/CNTs/TiO_2纤维 抗污染 一氧化氮
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A NEW KIND OF FIBER-SPUN FROM POLYSULFONAMIDE/ZINC SOLUTION 认领 引用 被引量：1
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作者 LIU Li WANG Xiaopeng +2 位作者 WANG Weitao DENG Jie TANG Zhiyong 《Chinese Journal of Reactive Polymers》 2007年第1期130-132,共3页
In this paper, we succeed in fabricating high-temperature fiber of polysulfonamide/ZnO. Polysulfonamide/ZnO nanocomposite was prepared by in-situ polymerization. Some studies and characterization of Polysulfonamide/ Z... In this paper, we succeed in fabricating high-temperature fiber of polysulfonamide/ZnO. Polysulfonamide/ZnO nanocomposite was prepared by in-situ polymerization. Some studies and characterization of Polysulfonamide/ Zinc oxide nanocomposite with ZnO 0.5% have been done. It includes ηr,, Crystal degree and thermal property. Experiment＇s results showed that, ZnO as filler can improve crystal degree of polysulfonamide fiber. The crystal degree has been bnproved, from lower than 20% up to 27%. ηr of polysulfonamide/ Zinc oxide nanocomposite solution with ZnO 0.5% is 2.03. The maxinum weight loss of the nanocomposite occurred at 453.5 ℃. 展开更多
关键词 Polysulfonamide fiber In-situ polymerization ZnO TiO2 Spinning.
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TiO2-PES Fibrous Composite Material for Ammonia Removal Using UV-A Photocatalyst 认领 引用
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作者 Anh Phuong Le Thi Masaru Ohshiro Takaomi Kobayashi 《Journal of Materials Science and Chemical Engineering》 2024年第1期1-19,共19页
This study focused on the development and characterization of TiO2-PES composite fibers with varying TiO2 loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structu... This study focused on the development and characterization of TiO2-PES composite fibers with varying TiO2 loading amounts using a phase inversion process. The resulting composite fibers exhibited a sponge-like structure with embedded TiO2 nanoparticles within a polymer matrix. Their photocatalytic performance for ammonia removal from aqueous solutions under UV-A light exposure was thoroughly investigated. The findings revealed that PeTi8 composite fibers displayed superior adsorption capacity compared to other samples. Moreover, the study explored the impact of pH, light intensity, and catalyst dosage on the photocatalytic degradation of ammonia. Adsorption equilibrium isotherms closely followed the Langmuir model, with the results indicating a correlation between qm values of 2.49 mg/g and the porous structure of the adsorbents. The research underscored the efficacy of TiO2 composite fibers in the photocatalytic removal of aqueous under  UV-A light. Notably, increasing the distance between the photocatalyst and the light source resulted in de-creased hydroxyl radical concentration, influencing photocatalytic efficiency. These findings contribute to our understanding of TiO2 composite fibers as promising photocatalysts for ammonia removal in water treatment applications. 展开更多
关键词 Ammonia Removal Photocatalyst TiO2-PES Composite Fiber Fibrous Material
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TiO_2-loaded activated carbon fiber:Hydrothermal synthesis,adsorption properties and photo catalytic activity under visible light irradiation 认领 引用 被引量：11
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作者 Hao Meng Wei Hou +2 位作者 Xinxin Xu Junli Xu Xia Zhang 《Particuology》 SCIE EI CAS CSCD 2014年第3期38-43,共6页
TiO2-loaded activated carbon fibers （ACF） were prepared by a hydrothermal method. The samples were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, Fourier transform infrared （FTIR... TiO2-loaded activated carbon fibers （ACF） were prepared by a hydrothermal method. The samples were characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, Fourier transform infrared （FTIR） spectrometry and UV-vis diffuse reflectance spectra （DRS）. SEM images showed that the TiO2 nanoparticles were deposited on the surface of ACF, and the particle size and loading amount of TiO2 were varied by changing the initial concentration of tetrabutyl titanate （TBOT）. The results of an ash experiment showed that the loading amounts of TiO2 were 18.4%, 43.3%, 52.5%, 75.1%, and 91.1% for initial concentrations of TBOT of 0.07,014, 0.21,0.28, and 0.35 tool/L, respectively, Physical interactions played an important role in the formation of TiO2/ACF composite fibers that absorb UV and visible light. Compared with those of ACF, improved adsorption and photocatalytic activity toward Rhodamine B （RhB） were observed for TiO2/ACF composite fiber. The Rhodamine B could be removed efficiently by TiO2/ACF composite fibers, and the TiO2 loading amount had a significant effect on the photocatalytic activity of TiO2/ACF composite fibers. 展开更多
关键词 Activated carbon fiber （ACF） TiO2 nanoparticles Adsorption property Photocatalytic activity Hydrothermal synthesis
超疏水超亲油玉米秸秆粉油污吸附剂的制备及其在油水分离中的应用 认领 引用 被引量：4
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作者 石彦龙 冯晓娟 +1 位作者 杨锐花 王健荣 《应用化学》 CAS CSCD 北大核心 2020年第7期793-802,共10页
超疏水超亲油材料因其在油水分离等领域有广泛的应用前景而引起人们极大关注。目前,有很多方法可以用来制备超疏水超亲油材料,但因其过程复杂、成本高、环境适应性差限制了其在实际生产、生活中应用。本文以玉米秸秆为原料,经TiO 2溶胶... 超疏水超亲油材料因其在油水分离等领域有广泛的应用前景而引起人们极大关注。目前,有很多方法可以用来制备超疏水超亲油材料,但因其过程复杂、成本高、环境适应性差限制了其在实际生产、生活中应用。本文以玉米秸秆为原料,经TiO 2溶胶浸涂并经辛基三甲氧基硅烷修饰后显示出超疏水和超亲油,水滴、油滴在其表面的接触角分别为160°和0°。研究结果显示,玉米秸秆粉表面的超疏水性源于其表面微纳米复合阶层结构及低表面能化学组成的协同作用。利用玉米秸秆粉表面的憎水性和亲油性,能将其用于水面油污的吸附和分离,具有分离效率高、稳定性好、可循环利用的优点。相比于其它材料,以玉米秸秆为原料制备超疏水超亲油的油污吸附剂,原料丰富、成本低、过程简单、易降解、可循环利用,有望在生产、生活中得到应用。 展开更多
关键词 玉米秸秆 超疏水 超亲油 TiO2 油污吸附
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胶原纤维为模板制备Gd掺杂纤维状二氧化钛及光催化性能研究 认领 引用 被引量：1
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作者 张理元 由耀辉 +2 位作者 尤佳 刘义武 阮尚全 《人工晶体学报》 CAS 北大核心 2019年第2期312-320,共9页
以胶原为模板剂、硫酸钛为钛源、硝酸钆为掺杂源制备了钆掺杂纤维结构TiO_2(Gd-TiO_2)。通过扫描电镜(SEM)、X射线衍射仪(XRD)、紫外可见漫反射光谱(UV-Vis-DRS)、X射线光电子能谱(XPS)对样品的表面形貌、晶相组成、紫外吸收带、元素组... 以胶原为模板剂、硫酸钛为钛源、硝酸钆为掺杂源制备了钆掺杂纤维结构TiO_2(Gd-TiO_2)。通过扫描电镜(SEM)、X射线衍射仪(XRD)、紫外可见漫反射光谱(UV-Vis-DRS)、X射线光电子能谱(XPS)对样品的表面形貌、晶相组成、紫外吸收带、元素组成及化合价态进行了分析。以甲基橙为目标降解物,研究了样品的光催化性能并确定钆的最佳掺杂量。结果表明:600℃煅烧温度下2%Gd-TiO_2纤维结构完好、光催化效果最好,光反应30 min后其降解率达到91. 89%,比起未掺杂试样大大提高。钆掺杂会改变TiO_2的晶粒尺寸并能够抑制TiO_2从锐钛矿相向金红石相转变,掺杂后紫外吸收带发生蓝移。 展开更多
关键词 胶原纤维 模板法 二氧化钛 Gd掺杂 光催化
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碳纤维@二氧化钛纳米线@Ag的制备及其光催化性能 认领 引用
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作者 孙银宇 《安阳师范学院学报》 2020年第2期20-23,共4页
采用“预涂层”–“生长”–“负载”三步法制备得到碳纤维@二氧化钛纳米线@Ag复合光催化材料。通过场发射扫描电子显微镜、X射线衍射光谱和X射线光电子能谱对该复合材料进行分析表征,并对其光催化性能进行测定。结果表明:TiO2纳米线在... 采用“预涂层”–“生长”–“负载”三步法制备得到碳纤维@二氧化钛纳米线@Ag复合光催化材料。通过场发射扫描电子显微镜、X射线衍射光谱和X射线光电子能谱对该复合材料进行分析表征,并对其光催化性能进行测定。结果表明:TiO2纳米线在碳纤维表面分布均匀且致密,Ag纳米颗粒在TiO2-NWs表面分布较为均匀。该复合材料对亚甲基蓝表现出较好的光催化效果和稳定性。 展开更多
关键词 碳纤维 TiO2 纳米线 Ag 光催化
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