TiO_2纳米管/Ti光阳极的氢化处理及其光解水性能  

Hydrogen Treated TiO_2 Nanotube/Ti Photoanode and Its Photospliting Water Property

作　　者：李广忠[1] 汤慧萍[1] 张文彦[1] 李纲[1] 赵培[1] 

机构地区：[1]西北有色金属研究院金属多孔国家重点实验室,陕西西安710016

出　　处：《稀有金属材料与工程》2013年第11期2341-2345,共5页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50902115)

摘　　要：氢化处理TiO2纳米管是一种简单而又有效地提高其光解水制氢效率的方法。通过采用FE-SEM、TEM、XRD及XPS等研究,在大气气氛500℃热处理后,接着经300℃氢化处理后,获得了由以锐钛矿组成的TiO2纳米管壁,和在纳米管内壁上高度无序的表面层组成的双相结构的TiO2纳米管阵列,且在纳米管表面形成了Ti-OH能带。光催化分解水试验表明,在光强为100 mW/cm2的模拟太阳光照射下氢化处理后的TiO2纳米管光阳极的光电流密度可达4.88mA/cm2,较未氢化处理的样品提高了约4倍。TiO2 nanotubes were prepared by annealing the as-prepared samples in air at 500 ℃,and then in hydrogen atmosphere at 300 □ C.Hydrogenated TiO2 nanotube arrays were studied by scanning electron microscopy （SEM）,transmission electron microscopy （TEM）,X-ray diffraction microscopy （XRD）,and X-ray photoelectron spectroscopy （XPS）.Results show that hydrogen-treated TiO2 nanotube arrays areconsisted of anatase phase TiO2 nanotube walls and disordered nanophase in the surface of TiO2 nanotube walls.It is demonstrated that the presence of the Ti-OH energy states in disordered nanophase.The hydrogenated TiO2 nanotube sample yields a photocurrent density of ～4.88 mA/cm2 vs Ag/AgCl,in 1 mol/L NaOH solution under the illumination of simulated solar light （100mW/cm2 from lamp coupled with an AM 1.5 G filter）.Remarkably,a 4-fold enhanced photocurrent density for TiO2 nanotubes after hydrogen treatment was observed.

关 键 词：TIO2纳米管 光阳极 氢化处理 光催化分解水 氢气 

分 类 号：TB383.1[一般工业技术—材料科学与工程]