(1. 南京师范大学 化学与环境科学学院，南京 210097；
2. 南京理工大学 化工学院，南京 210094)
摘 要: 采用溶胶−凝胶法制备S、Mo、Pt、Fe掺杂以及S/Mo、S/Fe、S/Ag共掺杂的TiO2粉末，利用XRD、XPS和UV-Vis等技术对样品进行表征；以1-萘酚-5-硫酸(L-酸)为目标物，考查紫外和可见光源下各催化剂的光催化活性。结果表明：除S/Ag-TiO2外，其余掺杂TiO2均为单一的锐钛矿相，掺杂后催化剂的吸收带边发生明显红移；对10 mg/L的L-酸进行降解，在可见光下，S-TiO2光催化活性较好，而在紫外光下，S/Ag-TiO2的光催化活性较好；经XPS分析发现，掺杂元素掺入到TiO2晶体内，使Ti2p结合能减小。S的掺杂不仅使S-TiO2样品的光催化活性增大，同时也提高了金属与S共掺杂样品的光催化活性。
关键字: 金属掺杂；硫掺杂；共掺杂；可见光；光催化
their photocatalytic activities
（1. School of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097, China;
2. School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China）
Abstract: S-, Mo-, Pt-, Fe-doped, and S/Mo, S/Fe, S/Ag co-doped TiO2 nanoparticles were synthesized by sol-gel method. The doped TiO2 photocatalysts were characterized by XRD, XPS and UV-Vis, and the photocatalytic activities were evaluated by photodegradation of 1-naphthol-5-sulfonic acid (L-acid) under ultraviolet and visible light radiation. The results show that the crystal form of all catalysts is single anatase expect S/Ag-TiO2, and the absorption band of all doped-TiO2 is red shift. For photodegradation of 10 mg/L L-acid, photocatalytic activity of S-TiO2 is better under the visible light irradiation, while the photocatalytic activity of S/Ag-TiO2 is better under the ultraviolet light irradiation. All doping elements are doped in the crystal of TiO2 and reduce Ti2p binding energy from X-ray photoelectron spectra (XPS). The sulfur element doping not only increases the photocatalytic activity of the S-TiO2 sample, but also simultaneously enhances the photocatalytic activity of sulfur element and metallic element co-doping the sample.
Key words: metal-doping; S-doping; co-doping; visible-light; photocatalysis
