Investigation of Construction and Modification of Advanced Titanium Oxide Nanotube Arrays and Photoelectrochemical Performance for Hydrogen Production

随着化石能源的急剧耗尽和大量碳排放，全球性能源危机和环境污染愈趋严重，人类社会经济的持续发展面临前所未有的严峻挑战。氢能作为一种高效、清洁的二次能源，被认为是最理想的绿色能源。利用太阳能光催化分解水制氢被认为将是最终解决没有二氧化碳排放的能源问题的有效手段。纳米TiO2半导体材料能级与水的氧化还原电位相匹配，是一种极具开发前景的光催化分解水纳米结构材料。与TiO2纳米颗粒薄膜相比，阳极氧化制备的TiO2纳米管阵列，具有高度有序的纳米管阵列结构，显著的量子尺寸效应和表面效应，光电转换性能优异，具有良好的化学稳定性。以TiO2纳米管阵列组成的光电解池光电催化分解水是目前光催化制氢领域内研究最广泛的...Today the depletion of fossile resources and the serious environmental pollution made by the fossile combustion are the two major problems for the sustainable development of economy and society in the world. Hydrogen, as a clean and high-energy density energy carrier, is considered as an ideal fuel for the future. Solar-hydrogen production from water is one of the most important and promising gree...学位：理学博士院系专业：化学化工学院化学系_物理化学(含化学物理)学号：2052006015323

Photocatalytic Degradation of Phenol by Self-organized Titanium Dioxide Nanotube Arrays

采用电化学阳极氧化法在钛基体上制得了高度致密的、有序的、均匀的TiO2纳米管阵列。用SEM、XRD等对其表面形貌和结构晶型进行了表征和分析。以TiO2纳米管阵列为光催化剂对废水中典型的有机污染物——苯酚进行了光催化降解,考察了影响光催化降解速率的因素。结果表明,在紫外光照下,苯酚水溶液的pH=3、ρ(苯酚)=10.0 mg/L时,具有锐钛矿相结构的TiO2纳米管阵列的光催化效果最好,相同条件下与溶胶凝胶法制备的纳米TiO2颗粒膜的光催化降解速率进行对比,前者比后者提高了近一倍。High-density,well-ordered and uniform titanium oxide nanotube arrays were prepared by electrochemical anodic oxidation.The morphology and crystal structure of the TiO2 nanotubes were characterized and analyzed by SEM and XRD.As a photocatalyst,TiO2 nanotube arrays were used to degrade phenol which is a typical organic pollutant in wastewater.The photocatalytic degradation under UV irradiation is most effective with anatase TiO2 nanotube arrays when pH of phenol solution is 3 and mass concentration of phenol is 10.0 mg/L.Compared with TiO2 nanoparticle coatings prepared by sol-gel process,the photocatalytic degradation rate of TiO2 nanotube arrays is almost doubled under the same experimental condition.国家自然科学基金项目(50571085

Progress of Photoelectrochemical Performance of Titania Nanotube Arrays for Hydrogen Production

以TIO2纳米管阵列为光阳极组成的光电解池光电催化分解水是目前光催化制氢领域内研究最广泛的体系之一。本文综述了近年来TIO2纳米管阵列在光电催化分解水制氢领域的最新研究进展,重点阐述了提高TIO2纳米管阵列光电转换效率和产氢速率的方法,指出了目前存在的问题,并对今后的发展提出了展望。The photoelectrolysis of water using the photoelectrochemical cell consisting of TiO2 nanotube array photoanode is one of the most extensive investigated systems for photocatalytic hydrogen production at the present.This paper reviews the new research achievements of TiO2 nanotube arrays on photoelectrocatalytic water splitting for hydrogen production.The methods to increase the photoelectric conversion efficiency and hydrogen production rate are emphasized.The existing problems and further development in this field are also proposed.国家自然科学基金(No.51072170;21021002);福建省自然科学基金(No.2011J01057);国家基础科学人才培养基金(No.J1030415)资助项