用于紫外光下氰化物光催化氧化的含硫纳米复合材料的制备和表征(英文)  

Synthesis and characterization of sulfur-titanium dioxide nanocomposites for photocatalytic oxidation of cyanide using visible light irradiation

作　　者：E.S.Baeissa 

机构地区：[1]Chemistry Department, Faculty of Science, King Abdulaziz University

出　　处：《催化学报》2015年第5期698-704,共7页

摘　　要：A sol-gel method was used to prepare TiO_2 and sulfur-TiO_2(S-TiO_2) nanocomposites, which were characterized by N_2 adsorption-desorption, X-ray diffraction, X-ray photoelectron spectroscopy, photoluminescene, ultraviolet visible and transmission electron microscopy measurements. The photocatalytic performance of TiO_2 and S-TiO_2 nanocomposites, with respect to the photocatalytic oxidation of cyanide under visible light irradiation, was determined. The results reveal that S is well dispersed on the surface of TiO_2 nanoparticles. Additionally, the surface area of the S-TiO_2 nanocomposites was observed to be smaller than that of the TiO_2 nanoparticles because of blocked pores caused by doping with S. The S-TiO_2 nanocomposite(0.3 wt% S) exhibited the lowest band gap and the highest photocatalytic activity in the oxidation of cyanide. The photocatalytic performance of S-TiO_2(0.3 wt% S) nanocomposites was stable, even after the fifth reuse of the nanoparticles for the oxidation of cyanide.A sol-gel method was used to prepare TiO2and sulfur-TiO2（S-TiO2）nanocomposites, which were characterized by N2 adsorption-desorption, X-ray diffraction, X-ray photoelectron spectroscopy, photoluminescene, ultraviolet visible and transmission electron microscopy measurements. The photocatalytic performance of TiO2 and S-TiO2nanocomposites, with respect to the photocatalytic oxidation of cyanide under visible light irradiation, was determined. The results reveal that S is well dispersed on the surface of TiO2 nanoparticles. Additionally, the surface area of the S-TiO2nano-composites was observed to be smaller than that of the TiO2nanoparticles because of blocked pores caused by doping with S. The S-TiO2nanocomposite （0.3 wt% S） exhibited the lowest band gap and the highest photocatalytic activity in the oxidation of cyanide. The photocatalytic performance of S-TiO2（0.3 wt% S） nanocomposites was stable, even after the fifth reuse of the nanoparticles for the oxidation of cyanide.

关 键 词：二氧化钛纳米颗粒 纳米复合材料 可见光照射 光催化氧化 氧化特性 氰化物 X射线光电子能谱 透射电子显微镜 

分 类 号：O643.3[理学—物理化学] TB33[理学—化学]