摘要
以泡沫镍为基材,采用溶胶-凝胶法制备了TiO2纳米膜光催化剂.在自制外加电场光催化反应装置中,对催化剂施加一定的偏电压,研究了甲基橙溶液的光电催化降解反应,考察了偏压极性、阳极偏压和甲基橙初始溶液浓度等对降解效率的影响,并比较了光电催化与光催化、光解对甲基橙溶液降解的差异.结果表明,外加阳极偏压形成的电场可以较大幅度提高甲基橙溶液的降解效率.从半导体和量子力学理论出发探讨了电场促进光催化反应的作用机理.
A TiO2 nano-membrane photocatalyst was prepared by the sol-gel method using foam-nickel as the radical material. In an in-house constructed photocatalytic reaction equipment with an electric field, the photoelectro-catalytic degradation of methyl orange solution was studied by applying a definite anode bias voltage on the catalyst. The effects of bias polarity, anode bias voltage, and initial concentration of methyl orange were investigated, and the differences between the photo-electro-catalysis and photocatalysis as well as photolysis were compared. The degradation efficiency of methyl orange can be greatly increased by applying the electric field. According to the theories of semiconductor and quantum mechanics, the photo-electro-catalytic reaction mechanism was discussed.
出处
《催化学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第9期783-786,共4页
关键词
电场
氧化钛
纳米膜
光催化
甲基橙
降解
electric field
titania
nano-membrane
photocatalysis
methyl orange
degradation
