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中文摘要：
采用溶胶-凝胶法制备了硫掺杂二氧化钛粉体（S-TiO2）,采用XRD、Nano-seriesSizer、FT-IR、UV-Vis、PL等方法对其进行表征和分析.结果表明,S掺杂抑制了TiO2 从锐钛矿相向金红石相的转变,减小了粒子间的团聚,拓展了TiO2 对可见光的吸收范围,有效地抑制了光生电子-空穴对的复合.光催化降解亚甲基蓝（MB）的实验表明,n（S）∶n（Ti）= 0.14,450℃烧结的S-TiO2 粉体具有最佳光催化性能,在普通日光灯下对亚甲基蓝的降解率3h达74.12 %,明显优于德国Degussa公司生产的P25纯TiO2 光催化剂对亚甲基蓝的降解率31.89%.
英文摘要：
S doped TiO2 powder (S-TiO2 )were synthesized by sol-gel method.The obtained samples were char-acterized by XRD,nano-series sizer,FT-Raman,UV-Vis,PL,respectively.The results show that S-doping can inhibit the TiO2 phase transition anatase to rutile,reduce the reunion between the particles,broaden the ab-sorption spectrum to the visible light region,and inhibit the recombination of photoelectron-hole pairs.The ex-periments of photocatalytic degradation of methylene blue (MB)indicate that the photocatalytic activity of the S-TiO2 powder prepared at n(S)∶n(Ti)=0.14(molar ratio)and the calcinated temperature of 450 ℃ was the best.Under the fluorescent light irradiation,the degradation rate of the S-TiO2 sample to methyl blue reaches 74.12% for 3 h,which was obviously higher than 31.89% of P25 TiO2 photocatalyst which made in Degussa, German.
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