(1. 南京師范大學(xué) 化學(xué)與環(huán)境科學(xué)學(xué)院，南京 210097；
2. 南京理工大學(xué) 化工學(xué)院，南京 210094)
摘 要: 采用溶膠−凝膠法制備S、Mo、Pt、Fe摻雜以及S/Mo、S/Fe、S/Ag共摻雜的TiO2粉末，利用XRD、XPS和UV-Vis等技術(shù)對樣品進(jìn)行表征；以1-萘酚-5-硫酸(L-酸)為目標(biāo)物，考查紫外和可見光源下各催化劑的光催化活性。結(jié)果表明：除S/Ag-TiO2外，其余摻雜TiO2均為單一的銳鈦礦相，摻雜后催化劑的吸收帶邊發(fā)生明顯紅移；對10 mg/L的L-酸進(jìn)行降解，在可見光下，S-TiO2光催化活性較好，而在紫外光下，S/Ag-TiO2的光催化活性較好；經(jīng)XPS分析發(fā)現(xiàn)，摻雜元素?fù)饺氲絋iO2晶體內(nèi)，使Ti2p結(jié)合能減小。S的摻雜不僅使S-TiO2樣品的光催化活性增大，同時也提高了金屬與S共摻雜樣品的光催化活性。
關(guān)鍵字: 金屬摻雜；硫摻雜；共摻雜；可見光；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
