TiO2光催化氧化有机物的研究现状及展望

论述了半导体光催化反应机理，从晶相组成、晶粒尺寸、热处理温度及气氛、表面羟基、表面结构等方面介绍了对催化剂活性的影响，探讨了反应物、氧气、pH值、温度、氧化剂、阴离子、光及光强等在光催化氧化降解过程中的作用，并对今后的研究及应用做出展望

preparationoftrititanatenanotubeandtemobservation

Trititanate nanotubes were synthesized from rutile TiO2 via hydrothermal process. The influences of process parameters such as stirring, acid leaching and calcination temperature on formation and structure of nanotubes were observed by TEM. The results show that continuous stirring could improve the directional growth of TiO2 particles and formation of trititanate nanoflakes, and nanotubes are formed in the acid leaching process. It also reveals that 300 degrees C is the critical transformation temperature between nanotubes and long-stick crystalline column. The nanotubes synthesized under optimal condition are uniform and longer than 1 mu m, and the ratio of length to diameter is 125:1

新型Ti/TiO_2电极的制备及其光电催化氧化活性

采用电解氧化金属钛网的方法制备新型光电极Ti/TiO2，采用X射线衍射仪，激光拉曼光谱仪与扫描电镜测试电极的表面晶体结构与表面形态，以腐殖酸溶液的总有机炭（TOC）的变化来评价电极的光电催化氧化活性。结果表明，电解电压与电流密度对电极表面的晶体组成，表面 态，孔隙大小与中心电子的结合能影响较大，电极制备的最佳电解电压与电流密度分别为160V，1100A／m^2，光电催化氧化可为给水处理提供一种方便，高效的方法