声电协同催化氧化降解苯甲酸的研究  

Study on the ultyrasound-assisted electro-catalytic oxidation of benzoic acid in water

作　　者：马前[1] 庄琳懿[1] 倪亚明[1] 

机构地区：[1]同济大学生命科学与技术学院,上海200092

出　　处：《化学研究与应用》2007年第2期191-194,共4页Chemical Research and Application

摘　　要：The electro-catalytic oxidation and ultrasound-assisted electro-catalytic oxidation are used respectively to the degradation of benzoic acid.The UV scanning spectra provea some intermediates which between them can absorb the UV light the degradation reaction.Tabdorbance peak varies with reaction time and the relationship is proccessed by NLSF.The results show that the reductions of relative absorbance peak of the solutions treated by the two ways both meet the pseudo first-order reduction kinetics,and the pseudo rate constants(K0) are 0.007±0.0006 and 0.0075±0.0001,respectively.Besides benzoic acid,the intermediate formic acid,acetic acid and phenol are detected by GC-MS in the reaction system after degradation for 60 min.It proves that benzoic acid is degraded into small-size organic compounds by the hydroxy1 radicals.The electro-catalytic oxidation and ultrasound-assisted electro-catalytic oxidation are used respectively to the degradation of benzoic acid. The UV scanning spectra provea some intermediates which between them can absorb the UV light the degradation reaction. Tabdorbance peak varies with reaction time and the relationship is proccessed by NLSF. The results show that the reductions of relative absorbance peak of the solutions treated by the two ways both meet the pseudo first-order reduction kinetics, and the pseudo rate constants （ K0 ） are 0.007 ± 0.0006 and 0. 0075 ± 0.0001, respectively. Besides benzoic acid, the intermediate formic acid,acetic acid and phenol are detected by GC-MS in the reaction system after degradation for 60 min. It proves that benzoic acid is degraded into small-size organic compounds by the hydroxyl radicals.

关 键 词：电催化氧化 超声 苯甲酸 中间体 机理 

分 类 号：O621.251[理学—有机化学]