Ti/SnO_2-F新型电极氧化降解全氟辛酸  

Novel F-doped Ti/SnO_2 electrode for PFOA degradation in aqueous solution

作　　者：蒋超金 卓琼芳[2] 李静[1] 杨波[1] JIANG Chaojin ZHUO Qiongfang LI Jing YANG Bo(College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China South China Institute of Environmental Sciences, Ministry of Environmental Protection of Ministry of Environmental Protection of the People＇ s Republic of China, Guangzhou 510655, China)

机构地区：[1]深圳大学化学与环境工程学院,深圳518060 [2]环境保护部华南环境科学研究所,广州510000

出　　处：《环境工程学报》2016年第11期6464-6468,共5页Chinese Journal of Environmental Engineering

基　　金：国家高技术研究发展计划(863计划)项目(2013AA062705);国家自然科学基金资助项目(21177089;11275130);广东省自然科学基金资助项目(2014A030313761)

摘　　要：采用溶胶-凝胶法制备F掺杂的Ti/SnO_2电极,用于水相中全氟辛酸(PFOA)的电氧化降解,实验考察了F或Sb掺杂、煅烧温度、氟掺杂量、老化时间及涂覆次数对PFOA降解效率的影响。结果表明,在煅烧温度为500℃,掺杂比Sn∶F=9∶0.25,老化时间10 d,涂覆20次的条件下,F掺杂的Ti/SnO_2电极性能最好,反应30 min对PFOA的降解率达98%;而在相同电解条件下,Sb掺杂Ti/SnO_2电极降解PFOA效率仅61.7%。因此,F掺杂可有效提高SnO_2电极性能,有效氧化降解PFOA。The novel F-doped Ti / SnO_2 electrode prepared by a sol-gel process was used for electrochemical decomposition of persistent perfluorooctanoic acid（ PFOA）. The effects of doping elements like F or Sb,annealing temperature,F-doping amount,aging time,and dip coating times on the removal rate of PFOA were investigated. The optimal conditions included the introduction of F as the doping element,an annealing temperature of500 ℃,F-doping amount at the Sn ∶ F ratio of 9 ∶ 0. 25,10 days of aging time for the sol-gel solution,and 20 of dip coating time. Under these conditions,the removal rate of PFOA reached 98% after 30 min of degradation.However,the Ti / SnO_2-Sb electrode was able to remove only 61. 7% of PFOA under the same conditions. Therefore,the F-doping can effectively improve the electrooxidation performance of an SnO_2 electrode to degrade PFOA.

关 键 词：F掺杂Ti/SnO2电极 全氟辛酸 电氧化降解 

分 类 号：X703.1[环境科学与工程—环境工程]