有机硫化物在Ag^+改性钛铌酸盐上的吸附和光催化氧化  

ADSORPTION AND PHOTOCATALYTIC OXIDATION OF ORGANIC SULFIDES ON Ag^+-MODIFIED TITANONIOBATE

作　　者：何杰[1] 刘娟[1] 李莉[1] 

机构地区：[1]安徽理工大学化学工程学院,安徽淮南232001

出　　处：《石油学报（石油加工）》2010年第2期305-308,共4页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：安徽省自然科学基金项目(070414198);安徽省教育厅自然基金项目(KJ2008A121)资助

摘　　要：使用Ag+改性的钛铌酸钾盐(6K2O.TiO2.5Nb2O5)作为光催化剂,考察了二甲基硫醚(DMS)、乙硫醇(EM)及它们分别与正己烷的混合物在Ag+改性的钛铌酸钾盐表面吸附和光催化氧化作用,采用红外光谱方法对吸附与光催化氧化样品进行表征。结果表明,在Ag+改性钛铌酸盐表面,DMS的吸附较弱,于可见光辐射下稳定,但在紫外光辐射下氧化成亚砜、砜、硫酸酯与单齿硫酸盐等,而EM的吸附较强,在可见光辐射下即可氧化为乙基磺酸(CH3CH2SO2OH)。正己烷增强了DMS和EM与Ag+改性钛铌酸盐表面的作用力,促进了DMS和EM的深度氧化。Ag＋-modified titanoniobate was used as photocatalyst, which was prepared with titanoniobate （6K2O·TiO2·5Nb2O5） through Ag＋ modification. The adsorption feature and phtocatalytic oxidation activity of dimethyl sulfide （DMS）, ethyl mercaptan （EM）, and the mixture of n-hexane with DMS or EM, respectively, on the as-prepared Ag＋-modified titanoniobate were evaluated through infrared spectroscopy technoque. The results showed that the DMS adsorbed on the surface of Ag＋-modified titanoniobate was stable under visible light irradiation due to a weak interaction between DMS and Ag＋-modified titanoniobate, while it was converted to DMSO, DMSO2, dimethyl sulfate and monodentate sulphate under ultra-light irradiation. The EM adsorbed on the surface of Ag＋-modified titanoniobate, while it was converted to DMSO, DMSO2, dimethyl sulfate and monodentate sulphate under ultra-light irradiation. The EM adsorbed on the surface of Ag＋-modified titanoniobate was converted to ethyl sulfonic acid （CH3Ch2SO2OH） even though under visible light irradiation due to a strong interaction between EM and Ag＋-modified titanoniobate. The interaction between DMS or EM and the surface of the Ag＋-modified titanoniobate was enhanced and the oxidation of DMS and EM was promoted when they were mixed with n-hexane.

关 键 词：钛铌酸盐 二甲基硫醚 乙硫醇 正己烷 吸附 光催化氧化 

分 类 号：O643.3[理学—物理化学] TE644[理学—化学]