N-S/TiO2薄膜太阳光下光电催化降解甲基橙的研究  

Photoelectrocatalytic degradation of methyl orange wastewater by N-S/TiO2 film under sunlight

作　　者：李长欣 佟心宇 徐娟娟 张延宗 Li Changxin;Tong Xinyu;Xu Juanjuan;Zhang Yanzong(College of Environment,Sichuan Agricultural University,Chengdu 611130,China)

机构地区：[1]四川农业大学环境学院,四川成都611130

出　　处：《工业水处理》2020年第5期35-39,共5页Industrial Water Treatment

基　　金：四川省科学技术厅资助项目(2017JZ0021,2017SZ0039);四川省教育厅资助项目(17ZA0298)。

摘　　要：以过硫酸铵水溶液为氮源(N)、硫源(S),通过阳极氧化法在不同电压下成功制备出了N-S/TiO2薄膜。采用SEM、XRD、XPS和UV-vis NIR对Ti O2薄膜进行表征分析,并研究了其在太阳光下对甲基橙(MO)的降解性能。结果表明,随着氧化电压的升高,N、S掺杂浓度逐渐增加,Ti O2薄膜逐渐变成多孔结构且向锐钛矿晶相转化。氧化电压为40 V的薄膜降解效果最好,在模拟太阳光下照射20 min,其对MO的脱色率为98.71%,TOC去除率为59.44%。重复使用10次,仍表现出较高的降解效率。Using ammonium persulfate electrolyte as the sources of nitrogen(N) and sulfur(S),N-S/TiO2 films were successfully prepared via anodization at different voltages. The N-S/TiO2 films were characterized by SEM,XRD,XPS and UV-vis NIR,and their degradation performance of methyl orange(MO) under sunlight were investigated. The results showed that with the increase of oxidation voltage,the doping concentrations of N and S gradually increased,and the TiO2 film became porous structure and transformed into the anatase crystal phase. The film prepared with a voltage of 40 V had the highest degradation effect:under simulated sunlight for 20 min,the MO decolorization rate had reached 98.71%,and the TOC removal rate reached 59.44%. High degradation efficiency was still showed for MO after reusing ten times.

关 键 词：TIO2薄膜 窄带隙 太阳光 光电催化 甲基橙 

分 类 号：X703.1[环境科学与工程—环境工程]