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Sonocatalytic Damage of Bovine Serum Albumin (BSA) in the Presence of Nanometer Titanium Dioxide (TiO_2) Catalyst 被引量:3
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作者 Jun WANG Jing WU +6 位作者 Zhao Hong ZHANG Xiang Dong ZHANG Lei WANG Liang XU Bao Dong GUO Hong LI Jian TONG 《Chinese Chemical Letters》 SCIE CAS CSCD 2005年第8期1105-1108,共4页
The sonocatalytic damage of bovine serum albumin (BSA) was studied in the presence of nanometer titanium dioxide (TiO2) powders by low frequency (80 kHz) ultrasound. The destruction of secondary structure and ch... The sonocatalytic damage of bovine serum albumin (BSA) was studied in the presence of nanometer titanium dioxide (TiO2) powders by low frequency (80 kHz) ultrasound. The destruction of secondary structure and change of α-helical structure of BSA were reflected by ultraviolet (UV) and circular dichroism (CD) spectroscopies. 展开更多
关键词 Bovine serum albumin (BSA) sonocatalytic damage nanometer titanium dioxide tio2).
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Fabrication of Dye Sensitized Solar Cell Based on Titanium Dioxide (TiO<sub>2</sub>)
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作者 Ari A. Mohammed Alan S. Said Ahmad Wafaa A. Azeez 《Advances in Materials Physics and Chemistry》 2015年第9期361-367,共7页
The Dye Sensitized Solar Cell (DSSC) plays an important role because of low material cost, ease of production and high conversion efficiency as compared to other thin-film solar cell technologies. The main objective i... The Dye Sensitized Solar Cell (DSSC) plays an important role because of low material cost, ease of production and high conversion efficiency as compared to other thin-film solar cell technologies. The main objective is to create and find the best configuration of the solar cell based on materials that are inexpensive and highly efficient in solar energy conversion and subsequently test the efficiency of dye sensitized titanium dioxide solar cell. We begin the process with two glass plates coated with Fluorine tin oxide (FTO). Titanium dioxide is applied to the conductive side of one plate and the other plate is coated with graphite. A dye is adsorbed on to the TiO2 layer and then the plates are sandwiched together. A drop of iodide electrolyte is then added between the plates. The tests carried out indoors under a lamp emitting all wavelengths in the visible spectrum were not found to provide consistent data due to substantial heating of the cell. The outdoor tests carried out in natural sunlight exhibited steady voltage at much higher level. Future research will involve the incorporation of quantum dots instead of the organic dye as a sensitizer. Quantum dots have the advantages of providing tunable band gaps and the ability to absorb specific wavelength. 展开更多
关键词 TRANSPARENT CONDUCTING Glass titanium dioxide (tio2) Nanoparticles Organic DYES ELECTROLYTE
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A Review of the Production Cycle of Titanium Dioxide Pigment 被引量:6
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作者 Manuel Jesús Gázquez Juan Pedro Bolívar +1 位作者 Rafael Garcia-Tenorio Federico Vaca 《Materials Sciences and Applications》 2014年第7期441-458,共18页
Titanium is a very important element for several industrial applications, being one of the ninth most abundant elements in the Earth’s crust (0.63% wt). In this work it will discuss the different mining and industria... Titanium is a very important element for several industrial applications, being one of the ninth most abundant elements in the Earth’s crust (0.63% wt). In this work it will discuss the different mining and industrial activities involved in the production of titanium dioxide. The first step analyzed will treat about the beneficiation mining process of titanium mineral, and secondly, it will discuss the two main processes of the TiO2 manufacturing (sulphate and chloride routes). In addition, we will show different uses of the titanium dioxide pigment as filler in paper, plastics and rubber industries and as flux in glass manufacture, etc. Finally, we will show that the old wastes are currently called co-products since they were valorized, being commercialized by the Spanish industry of TiO2 production in different fields such as agriculture, civil engineering, or cement manufacturing. 展开更多
关键词 titanium Minerals titanium dioxide Pigment Properties and Uses of tio2 Valorization of Co-Products
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One-pot Synthesis of TiO2 Nanoparticles in Suspensions for Quantification of Titanium Debris Release in Biological Liquids
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作者 Christophe Massard Daniel Bourdeaux +5 位作者 Vincent Raspal Emmanuelle Feschet-Chassot Yves Sibaud Eric Caudron Thierry Devers Kolma Oscar Awitor 《Advances in Nanoparticles》 2012年第3期86-94,共9页
In this work we have developed an analytical method to measure potential titanium debris released from TiO2 nanotube layers devices immersed in biological fluids. This quantitative study is highly required to ensure b... In this work we have developed an analytical method to measure potential titanium debris released from TiO2 nanotube layers devices immersed in biological fluids. This quantitative study is highly required to ensure both the security and non toxicity of the nanostructured surfaces used as future implantable medical devices in the living. A one-pot synthesis process is developed to produce high quality standard solutions of titanium dioxide nanoparticles in aqueous medium. The elaborated dispersion is then used to fabricate standard solutions in both aqueous and human blood plasma media. The synthesized nanoparticles dispersion was characterized by granulometry. The nanoparticles structure and morphology were then observed using Transmission Electron Microscopy (TEM). Thermogravimetric Analysis (TGA) was used to evaluate the concentration of TiO2 in the suspension. A quantitative routine by the use of Inductively Coupled Plasma Atomic Emission Spectroscopy (ICP-AES) is developed. The quantification threshold of titanium species is found to be in the 30 - 40 ppb range. None interference is detected between the particles and the human blood plasma. Using the established quantitative routine, the titanium species release from titania nanotube layers in human blood plasma is evaluated. 展开更多
关键词 titanium dioxide nanotube Layer tio2 Nanoparticles DEBRIS RELEASE BIOLOGICAL Matrix Inductively Coupled Plasma Atomic Emission Spectroscopy
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The Effect of Titanium Dioxide and Zinc Oxide Nanoparticles on Some Mechanical Properties of Epoxy Nanocomposites: A Comparative Study
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作者 Khalid R. Al-Rawi 《Journal of Physical Science and Application》 2016年第1期105-109,共5页
A new type of inorganic-polymer materials of epoxy Titanium Dioxide and Zinc Oxide was prepared. In this work, the mechanical properties of polymer composites reinforced with ceramic nanoparticles were investigated. T... A new type of inorganic-polymer materials of epoxy Titanium Dioxide and Zinc Oxide was prepared. In this work, the mechanical properties of polymer composites reinforced with ceramic nanoparticles were investigated. Three points bending tests demonstrated an enhancement in flexural strength and flexural modulus respectively, compared to the pure epoxy. The reinforcement of nanoparticulate materials was Titanium Dioxide and Zinc Oxide with various weight fraction. Experimental tests results indicated that the composite materials have significantly higher modulus of elasticity than the matrix material. It was found that the enhancement in modulus of elasticity was directly proportional to the weight fraction of reinforcement material, and that Zinc Oxide composites have higher modulus of elasticity than Titanium Dioxide composites with equivalent of weight fraction. The wear results showed that nanoparticles improved the wear resistance of epoxy nanocomposites, the Titanium Dioxide matrix particles could improve the wear resistance of the epoxy more efficiently than Zinc Oxide particles. The fatigue test showed that the fatigue resistance of epoxy Zinc Oxide matrix particles was higher than that of Titanium Dioxide matrix particles. 展开更多
关键词 Nanoparticles EPOXY flexural strength flexural modulus Zinc Oxide (ZnO) titanium dioxide tio2 WEAR FATIGUE nanocomposites.
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活性炭载体对TiO_2/AC光催化降解苯酚影响研究 被引量:7
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作者 姜勇 解强 +2 位作者 张婷婷 王燕 姚鑫 《工业水处理》 CAS CSCD 北大核心 2011年第8期28-31,共4页
分别以典型煤基活性炭和椰壳活性炭为载体,采用溶胶-凝胶法制备了TiO2/AC复合光催化剂,采用低温氮气吸附、X射线衍射、扫描电镜等对其性能进行了表征,分析了活性炭载体对复合光催化剂性能的影响。结果表明:TiO2在椰壳活性炭载体上的负... 分别以典型煤基活性炭和椰壳活性炭为载体,采用溶胶-凝胶法制备了TiO2/AC复合光催化剂,采用低温氮气吸附、X射线衍射、扫描电镜等对其性能进行了表征,分析了活性炭载体对复合光催化剂性能的影响。结果表明:TiO2在椰壳活性炭载体上的负载率高于煤基活性炭,TiO2负载使椰壳活性炭的比表面积和微孔容明显减小,TiO2溶胶对微孔的堵塞作用显著,煤基复合光催化剂对苯酚的吸附和光催化效果优于椰壳复合光催化剂。 展开更多
关键词 tio2/AC 复合光催化剂 苯酚废水
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TiO_2纳米棒阵列光电化学性能的综合实验设计 被引量:4
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作者 顾修全 赵宇龙 强颖怀 《实验室研究与探索》 CAS 北大核心 2019年第1期73-76,共4页
运用水热合成路线制备出一种准直有序的TiO_2纳米棒阵列材料,采用XRD、SEM等手段对材料的形貌、结构进行表征,重点考察了TiCl_4预处理对TiO_2阵列光电化学性能的影响。结果表明,TiO_2纳米棒直径约150 nm,长度在2~3μm,整齐有序排列,其... 运用水热合成路线制备出一种准直有序的TiO_2纳米棒阵列材料,采用XRD、SEM等手段对材料的形貌、结构进行表征,重点考察了TiCl_4预处理对TiO_2阵列光电化学性能的影响。结果表明,TiO_2纳米棒直径约150 nm,长度在2~3μm,整齐有序排列,其中经过60 mmol/L TiCl_4预处理的样品具有最佳的光电流密度。电化学阻抗谱结果表明,该样品的电极/电解液界面电荷转移电阻最小,这与该条件下得到的TiO_2纳米阵列的结晶质量增强有关。本实验原料廉价、操作简单,且涵盖多个知识点,不仅有利于培养本科生收集、整理、分析实验数据的技能,还可以培养他们发现问题和解决问题的综合创新能力。 展开更多
关键词 光电化学 水热法 二氧化钛 纳米棒 阵列 阻抗
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水热法制备TiO_2薄膜光催化降解性能的研究 被引量:10
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作者 宫华 苗鸿雁 +1 位作者 刘开平 罗宏杰 《陕西科技大学学报(自然科学版)》 2003年第1期5-8,共4页
以 Ti( SO4) 2 水溶液为前驱物 ,尿素为沉淀剂 ,采用水热法制备了锐钛矿型 Ti O2 薄膜 ,研究了该薄膜光降解苯甲酸的性能以及 Ti O2
关键词 水热法制备 tio2薄膜 光催化 降解性能 机理 光降解苯甲酸
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Time-resolved photoluminescence of anatase/rutile TiO_2 phase junction revealing charge separation dynamics 被引量:3
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作者 王秀丽 沈帅 +1 位作者 冯兆池 李灿 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第12期2059-2068,共10页
Junctions are an important structure that allows charge separation in solar cells and photocatalysts. Here, we studied the charge transfer at an anatase/rutile TiO2 phase junction using time-resolved photoluminescence... Junctions are an important structure that allows charge separation in solar cells and photocatalysts. Here, we studied the charge transfer at an anatase/rutile TiO2 phase junction using time-resolved photoluminescence spectroscopy. Visible (-S00 nm) and near-infrared (NIR, -830 nm) emissions were monitored to give insight into the photoinduced charges of anatase and rutile in the junction, respectively, New fast photoluminescence decay components appeared in the visible emission of futile-phase dominated TiO2 and in the NIR emission of many mixed phase TiO2samples. The fast decays confirmed that the charge separation occurred at the phase junction. The visible emission intensity from the mixed phase TiO2 increased, revealing that charge transfer from rutile to anatase was the main pathway. The charge separation slowed the microsecond time scale photolumines- cence decay rate for charge carriers in both anatase and rutile. However, the millisecond decay of the charge carriers in anatase TiO2 was accelerated, while there was almost no change in the charge carrier dynamics of rutile TiO2. Thus, charge separation at the anatase/rutile phase junction caused an increase in the charge carrier concentration on a microsecond time scale, because of slower electron-hole recombination. The enhanced photocatalytic activity previously observed at ana- tase/rutile phase junctions is likely caused by the improved charge carrier dynamics we report here. These findings may contribute to the development of improved photocatalytic materials. 展开更多
关键词 titanium dioxide tio2)Anatase/rutile phase junctionCharge separation Charge recombination Time-resolved photoluminescence
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TiO_2光催化性能及在水处理中的应用 被引量:13
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作者 王春梅 《南通大学学报(自然科学版)》 CAS 2005年第1期28-31,42,共5页
文章介绍了TiO2 光催化的机理,分析了催化剂、光源、有机物浓度等因素对光催化效率的影响。
关键词 tio2 水处理 光催化性能 应用 光催化效率 有机物浓度 光催化氧化 催化剂
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Ti/TiO_2界面的整流特性研究
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作者 石明吉 张丽丽 +2 位作者 胡小杰 钟世杰 李鹏 《南阳理工学院学报》 2013年第3期83-86,共4页
采用电化学阳极氧化法在钛片表面构筑了一层结构有序、纳米级的TiO2纳米管阵列膜层,考察了制备电压对TiO2纳米管阵列形貌和尺寸的影响,应用扫描电子显微镜(SEM)对膜层的形貌进行了表征,测量了Ti/TiO2界面的整流特性,研究了TiO2纳米管阵... 采用电化学阳极氧化法在钛片表面构筑了一层结构有序、纳米级的TiO2纳米管阵列膜层,考察了制备电压对TiO2纳米管阵列形貌和尺寸的影响,应用扫描电子显微镜(SEM)对膜层的形貌进行了表征,测量了Ti/TiO2界面的整流特性,研究了TiO2纳米管阵列膜层结构与Ti/TiO2界面的整流特性的关系。结果表明:制备电压对TiO2纳米管阵列的结构起到关键的作用,二氧化钛纳米管之所以具有整流特性是由于Ti/TiO2界面具有类似p-n结的性质。利用二氧化钛纳米管的整流特性,人们可以制备出各种性能优良的材料和器件。 展开更多
关键词 二氧化钛 纳米管阵列 阳极氧化法 整流特性
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多孔TiO_2陶瓷光催化剂降解糠醛废水 被引量:5
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作者 卢旭东 姜承志 《辽宁化工》 CAS 2002年第4期139-140,共2页
以钛酸四丁酯等为原料 ,采用简单工艺制得多孔TiO2 陶瓷光催化剂 ;并研究了利用多孔TiO2 陶瓷光催化降解糠醛废水。结果表明 ,在紫外灯下照射 6 0min ,糠醛废水的COD去除率可达 5 9.8% ,而通入空气有利于污染物的去除。
关键词 光催化剂 降解 多孔tio2陶瓷 糠醛废水 光催化 废水处理 有机工业
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TiO_2纳米管负载BMP-2指节肽对骨髓间充质干细胞增殖与分化的影响 被引量:7
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作者 赵旭 卢燃 陈溯 《北京口腔医学》 CAS 2017年第5期241-244,共4页
目的检测负载骨形态发生蛋白2(bone morphogenetic protein 2,BMP-2)指节肽的二氧化钛(TiO_2)纳米管复合结构对骨髓间充质干细胞增殖与成骨分化的影响。方法通过阳极氧化法在钛片表面制备TiO_2纳米管阵列。全骨髓差速贴壁法分离培养Wis... 目的检测负载骨形态发生蛋白2(bone morphogenetic protein 2,BMP-2)指节肽的二氧化钛(TiO_2)纳米管复合结构对骨髓间充质干细胞增殖与成骨分化的影响。方法通过阳极氧化法在钛片表面制备TiO_2纳米管阵列。全骨髓差速贴壁法分离培养Wistar大鼠骨髓间充质干细胞。实验组负载BMP-2指节肽TiO_2纳米管;对照组只采用TiO_2纳米管。2组纳米管钛片接种间充质干细胞培养,测定细胞增殖、碱性磷酸酶活性、骨钙素(osteocalcin,OCN)及骨桥蛋白(osteopontin,OPN)RNA表达,并进行统计学分析。结果 2组细胞培养1、3、5天,细胞增殖实验组>对照组(P<0.05);2组细胞培养7、10、15天,碱性磷酸酶活性实验组>对照组(P<0.01);2组细胞培养21天后,骨钙素和骨桥蛋白的差异倍数(fold change)显示为实验组>对照组。结论 TiO_2纳米管负载BMP-2指节肽对骨髓间充质干细胞增殖和早期成骨分化的促进作用强于单纯TiO_2纳米管结构。 展开更多
关键词 二氧化钛纳米管 BMP-2指节肽 骨髓间充质干细胞 成骨分化
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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 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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Research progress of TiO2 photocathodic protection to metals in marine environment 被引量:3
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作者 WANG Xiutong XU Hui +4 位作者 NAN Youbo SUN Xin DUAN Jizhou HUANG Yanliang HOU Baorong 《Journal of Oceanology and Limnology》 SCIE CAS CSCD 2020年第4期1018-1044,共27页
Corrosion protection has become an important issue as the amount of infrastructure construction in marine environment increased.Photocathodic protection is a promising method to reduce the corrosion of metals,and tita... Corrosion protection has become an important issue as the amount of infrastructure construction in marine environment increased.Photocathodic protection is a promising method to reduce the corrosion of metals,and titanium dioxide(TiO2) is the most widely used photoanode.This review summarizes the progress in TiO2 photo gene rated protection in recent years.Different types of semiconductors,including sulfides,metals,metal oxide s,polymers,and other materials,are used to design and modify TiO2.The strategy to dramatically improve the efficiency of photoactivity is proposed,and the mechanism is investigated in detail.Characterization methods are also introduced,including morphology testing,light absorption,photoelectrochemistry,and protected metal observation.This review aims to provide a comprehensive overview of Ti02 development and guide photocathodic protection. 展开更多
关键词 photocathodic protection CORROSION titanium dioxide(tio2) PHOTOELECTROCHEMISTRY metal
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Systematic study of H2 production from catalytic photoreforming of cellulose over Pt catalysts supported on TiO2 被引量:3
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作者 Lan Lan Yan Shao +3 位作者 Yilai Jiao Rongxin Zhang Christopher Hardacre Xiaolei Fan 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2020年第8期2084-2091,共8页
Hydrogen(H2)production from photocatalytic reforming of cellulose is a promising way for sustainable H2 to be generated.Herein,we report a systematic study of the photocatalytic reforming of cellulose over Pt/m-TiO2(i... Hydrogen(H2)production from photocatalytic reforming of cellulose is a promising way for sustainable H2 to be generated.Herein,we report a systematic study of the photocatalytic reforming of cellulose over Pt/m-TiO2(i.e.mixed TiO2,80%of anatase and 20%of rutile)catalysts in water.The optimum operation condition was established by studying the effect of Pt loading,catalyst concentration,cellulose concentration and reaction temperature on the gas production rate of H2(r(H2))and CO2(r(CO2)),suggesting an optimum operation condition at 40°C with 1.0 g·L^-1of cellulose and 0.75 g·L^-1of 0.16-Pt/m-TiO2 catalyst(with 0.16 wt%Pt loadting)to achieve a relatively sound photocatalytic performance with rH2=9.95μmol·h^-1.It is also shown that although the photoreforming of cellulose was operated at a relatively mild condition(i.e.with an UV-A lamp irradiation at40°C in the aqueous system),a low loading of Pt at^0.16 wt%on m-TiO2 could promote the H2 production effectively.Additionally,by comparing the reaction order expressed from both r(H2)(a1)and r(CO2)(a2)with respect to cellulose and water,the possible mechanism of H2 production was proposed. 展开更多
关键词 Hydrogen(H2)production Catalytic photoreforming CELLULOSE Kinetics titanium dioxide(tio2)
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二氧化钛(TiO2)/氧化石墨烯复合催化氧化垃圾渗滤液 被引量:1
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作者 刘卓驿 蒋宝军 王飞虎 《吉林建筑大学学报》 2019年第2期35-38,共4页
本文通过比较二氧化钛(TiO2)、氧化石墨烯和TiO2/氧化石墨烯复合等3种催化剂处理垃圾渗滤液的效果,分析了它们的效果与投加量、反应时间之间的关系.试验结果表明,当投加TiO2/氧化石墨烯复合催化剂与渗滤液COD质量比为0.7、反应时间为2h... 本文通过比较二氧化钛(TiO2)、氧化石墨烯和TiO2/氧化石墨烯复合等3种催化剂处理垃圾渗滤液的效果,分析了它们的效果与投加量、反应时间之间的关系.试验结果表明,当投加TiO2/氧化石墨烯复合催化剂与渗滤液COD质量比为0.7、反应时间为2h时,处理条件最佳、催化剂对渗滤液COD的去除率为92.57%,处理后的渗滤液氨氮浓度为2016mg/L,可生化性BOD5/COD为0.83.综上,在这3种催化剂中TiO2/氧化石墨烯复合催化剂处理垃圾渗滤液的效果最好. 展开更多
关键词 垃圾渗滤液 二氧化钛(tio2) 氧化石墨烯 催化氧化
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分级多孔结构Bi2WO6/TiO2纳米材料的生物模板法制备及其光催化性能 被引量:1
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作者 王争一 白莉 +1 位作者 林鑫辰 冯威 《吉林建筑大学学报》 2019年第2期39-49,共11页
本文以玉米秸秆为生物模板,高温焙烧制备了具有玉米秸秆分级多孔结构的纯相二氧化钛(TiO2),再通过水热法制备了钨酸铋(Bi2WO6)/二氧化钛(TiO2)复合催化材料.运用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电... 本文以玉米秸秆为生物模板,高温焙烧制备了具有玉米秸秆分级多孔结构的纯相二氧化钛(TiO2),再通过水热法制备了钨酸铋(Bi2WO6)/二氧化钛(TiO2)复合催化材料.运用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)及紫外可见(UV-vis)漫反射等手段对催化材料的组成和微观结构进行了表征分析.结果表明,通过高温焙烧法制备的样品为纯相锐钛矿型TiO2,TiO2表面呈片状结构,通过多孔道相互联结形成多孔蜂窝结构,Bi2WO6呈花球状附着在TiO2表面,形成Bi2WO6/TiO2复合材料.以氙灯为光源,采用罗丹明B作为光催化降解污染物评价复合催化材料的光催化性能.结果表明:相较于纯相TiO2材料,Bi2WO6/TiO2复合材料在可见光下表现出对罗丹明B较好的催化活性.在氙灯光照射120min后,采用模板法制备的Bi2WO6/TiO2对罗丹明B的降解率高于无模板制备的Bi2WO6/TiO2复合材料,分别为99.3%和81.7%.在Bi2WO6/TiO2掺杂比为1∶2时,复合光催化材料表现出的光催化活性最好,并且在溶液pH=6、复合光催化材料投加量为0.4g时降解效果最佳.复合催化剂的光催化活性的提高主要由于Bi2WO6和TiO2形成了异质结构,提高了光生电子-空穴对的分离效率. 展开更多
关键词 生物模板 玉米秸秆 二氧化钛(tio2) 钨酸铋(Bi2WO6) 分级多孔结构 光催化
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Preparation of titanium dioxide-double-walled carbon nanotubes and its application in flexible dye-sensitized solar cells 被引量:1
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作者 Cunxi CHENG Jihuai WU +5 位作者 Yaoming XIAO Yuan CHEN Haijun YU Ziying TANG Jianming LIN Miaoliang HUANG 《Frontiers of Optoelectronics》 2012年第2期224-230,共7页
Titanium dioxide-double-walled carbon nano- tubes (TiO2-DWCNTs) with DWCNTs/TiO2 of 20 wt.% is prepared by a conventional sol-gel method. Doping the TiO2-DWCNTs in TiO2 photoanode, a flexible dye- sensitized solar c... Titanium dioxide-double-walled carbon nano- tubes (TiO2-DWCNTs) with DWCNTs/TiO2 of 20 wt.% is prepared by a conventional sol-gel method. Doping the TiO2-DWCNTs in TiO2 photoanode, a flexible dye- sensitized solar cell (DSSC) is fabricated. The sample is characterized by scanning electron microscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) absorption, ultraviolet-visible spectroscopy (UV- vis) absorption spectra , electrochemical impedance spec- troscopy (EIS) technique and photovoltaic measurement. It is found that adding a certain amount of TiO2-DWCNTs can efficiently decrease the resistance of charge transport, improve dye adsorption. Under an optimal condition, a flexible DSSC contained with 0.50 wt.% TiOz-DWCNTs achieves a light-to-electric energy conversion efficiency of 3.89% under a simulate solar light irradiation of 100 mW. cm^2. 展开更多
关键词 flexible dye-sensitized solar cell (DSSC) titanium dioxide tio2 double-walled carbon nanotube(DWCNT) sol-gel method
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Dependence of Nanotextured Titanium Orthopedic Surfaces on Electrolyte Condition 被引量:1
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作者 Sachin M. Bhosle Radheshyam Tewari Craig R. Friedrich 《Journal of Surface Engineered Materials and Advanced Technology》 2016年第4期164-175,共13页
Electrochemical etching of titanium alloy in a fluoride-containing electrolyte results in ordered nanotextured surfaces. The reproducibility of nanotextured surfaces depends on several process parameters, most notably... Electrochemical etching of titanium alloy in a fluoride-containing electrolyte results in ordered nanotextured surfaces. The reproducibility of nanotextured surfaces depends on several process parameters, most notably the fluoride ion concentration in the electrolyte. In the present work, electrochemical etching of Ti6Al4V alloy foils in ethylene glycol containing 0.66 wt% NH4F and 2% deionized water was carried out at 60 V for 45 minutes. This paper describes the depletion of fluoride ion concentration and contamination of electrolyte upon reuse. Inductively coupled plasma-optical emission spectroscopy was used to measure the dissolution of metal oxides in the electrolyte during etching. We found increasing concentration of the alloy elements Ti, Al, V contaminated the electrolyte due to repeated reuse of the electrolyte. The results show an appreciable log-linear depletion of fluoride ion concentration resulting in a changed surface morphology, chemical composition and etched volume. This paper provides an important insight to changes in surface morphology and surface chemistry with extended reuse of the etching electrolyte, useful for regulatory approvals. 展开更多
关键词 IMPLANTS Anodization tio2 nanotubes Fluoride Concentration titanium
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