W、N和C共掺杂TiO2催化剂的制备及其光解水析氢性能（英文）

Preparation of W/N/C-Tridoped TiO2 Photocatalyst with Excellent Photocatalytic H2 Evolution Performance

采用湿化学法制备了W、N、C三元共掺杂TiO2光催化材料,并采用了X射线衍射、透射电子显微镜、X射线光电子能谱和紫外–可见光漫反射仪对其进行表征。结果表明：W以＋6价方式取代Ti进入TiO2晶格,而N和C则以间隙方式进入TiO2晶格。W、N、C三元共掺杂可减小TiO2带隙（约3.0 e V）,增强TiO2对紫外可见光吸收能力,有效地提高了其光解水析氢性能。W、N、C三元共掺杂TiO2光催化材料显示出较优异的光解水析氢性能。

Nitrogen/carbon/tungsten-tridoped TiO2 photocatalyst was synthesized by a wet chemical method.The experiment results reveal that tungsten exists in the oxidation state of ＋6 and incorporates into the lattice of TiO2 by substituting Ti atoms.Nitrogen and carbon are incorporated into the lattice of TiO2 in interstitial mode.The light absorbance in UV-visible region is improved by tridoping with nitrogen,carbon and tungsten,leading to a narrower band gap（about 3.0 eV） and a better photocatalytic H2 evolution performance rather than those of pure and nitrogen/carbon-codoped TiO2.The excellent photocatalytic H2 evolution performance of nitrogen/carbon/tungsten-tridoped TiO2 photocatalyst is attributed to the narrow band gap,the intense UV light absorption and the proper electronic structure.