硫掺杂TiO_2光催化处理模拟废水Cr(VI)和2-萘酚  

Photocatalytic Degradation of Cr(VI) and 2-Naphthol in Water Using Sulfur-doped TiO_2 Catalyst

作　　者：夏璐[1] 李国磊[1] 张博涵[1] 邓啟敏 

机构地区：[1]广西民族大学化学化工学院广西林产化学与工程自治区重点实验室,化学与生物转化过程新技术广西高校重点实验室,南宁530008

出　　处：《科学技术与工程》2015年第7期122-128,共7页Science Technology and Engineering

基　　金：国家自然科学基金项目(41061044;41461092);广西自然科学基金面上项目(2012GXNSFAA053017);广西林产化学与工程协同创新中心基金项目(2013A10);广西民族大学研究生教育创新计划项目(gxun-chx2014095)资助

摘　　要：采用自制的S/Ti O2作为光催化剂,在可见光下进行光催化降解2-萘酚和还原Cr（VI）的实验。考察了S/Ti O2投加量、2-萘酚初始浓度和p H值对2-萘酚降解光催化性能的影响及Cr（VI）~2-萘酚混合体系光催化反应的研究。结果表明：S/Ti O2投加量为2.0 g/L,2-萘酚溶液初始浓度18.75 mg/L,p H值为6~7时2-萘酚光催化降解效果最好;混合体系中的2-萘酚的降解率及Cr（VI）还原率均较相应的单一体系高,Cr（VI）的还原与2-萘酚的氧化之间产生了协同效应。Cr（VI）和2-萘酚的光催化反应均为拟一级反应动力学。Photocatalytic degradation of 2-naphthol and reduction of Cr（Ⅵ） was studied by using sulfur-doped TiO2 as photo catalyst and visible light as light source. The influences of the dosage of catalyst, initial concentration of 2-naphthol and pH were investigated and study on visible photocatalytic of Cr（Ⅵ） -2-naphthol compound system. The optimum conditions are found： the proper dosage of sulfur -doped TiO2 catalyst is 2.0 g/L, concentration of 2-naphthol is 18.75 mg/L and pH = 6 - 7. In Cr （Ⅵ） - 2-naphthol compound system, 2-naphthol and Cr （VI） were more efficiently eliminated than in the single 2-naphthol or Cr（VI） system. The reduction of Cr（VI） and the oxidation of 2-naphthol produced a synergistic effect. The photocatalytic reduction of Cr（VI） and oxidation of 2-naphthol followed the pseudo first order reaction kinetics.

关 键 词：Cr(VI)~2-萘酚 S/TiO2 可见光催化 协同效应 

分 类 号：X703[环境科学与工程—环境工程]