锐钛矿型纳米氧化钛及其复合材料的低温制备技术  

Preparation of Nanosized Anatase TiO_2 and Its Composites at Low Temperature

作　　者：王靖宇[1] 刘志洪[1] 何治柯[1] 蔡汝秀[1] 

机构地区：[1]武汉大学化学与分子科学学院,武汉430072

出　　处：《化学进展》2007年第10期1495-1502,共8页Progress in Chemistry

摘　　要：探索低温合成高催化活性纳米TiO2及其复合材料的有效方法,突破传统的高温煅烧法制备锐钛矿型纳米TiO2光催化剂带来的局限,已成为该领域的研究热点。本文综述了近年来低温合成锐钛矿型纳米TiO2光催化剂的研究进展,讨论了目前所报道的各种方法(胶溶-相转移法、衍生溶胶-凝胶法、水热法、超声水解法、微波照射法、微乳液法和低温直接氧化法)的原理、操作步骤、反应进程以及优缺点;针对纳米TiO2晶体用作光催化剂时固有的缺陷,即量子效率低且无法利用可见光,进一步评述了离子掺杂、贵金属沉积以及半导体复合等纳米TiO2复合材料的低温制备技术;展望了该领域今后的发展方向和研究重点。To break through the limitation of traditional methods nanosized anatase TiO2 photocatalyst, and thus find effective ways for that utilize high-temperature calcination to prepare low-temperature synthesis of nanosized TiO2 with high catalytic activity, has been one of the most active aspects in the photocatalysis field. The recent progress in lowtemperature synthesis of nanosized anatase TiO2 photocatalyst is reviewed in this article. The principles, reactions, synthesizing procedures as well as the advantages and disadvantages of all reported methods （peptization-phase transfer, derived sol-gel, hydrothermal process, hydrolysis via ultrasonic irradiation, microwave radiation heating, microemulsion and direct low-temperature oxidation） are presented and discussed. Further, to overcome the intrinsic shortcomings of pure nanosized TiO2 as photocatalyst, i.e., the rather low quantum efficiency and the incapability of utilizing visible light, this review is also extended to the technologies of preparing TiO2 composites such as ion doping, rare metal deposition and composite semiconductors. Finally the developing trends and the potential focus of future research in this field are prospected.

关 键 词：低温制备 锐钛矿型TiO2 光催化剂 复合材料 

分 类 号：O614.4[理学—无机化学] O643.3[理学—化学]