Electrocatalytic Degradation of Nitrobenzene with Keggin-type Fe(Ⅲ)-Substituted Heteropolyanion PW11O39Fe(III)(H2O)4−

Acta Chimica Sinica ›› 2009, Vol. 67 ›› Issue (23): 2650-2654. Previous Articles Next Articles

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Keggin型杂多阴离子PW₁₁O₃₉Fe(III)(H₂O)^4-电催化降解硝基苯

华英杰^a，王崇太^*,a,b，童叶翔^c，张大帅^a，张奇^a ，谷铁安^a，胡佩^a

(a海南师范大学化学与化工学院海口 571158) (b海南省热带药用植物化学重点实验室海口 571158) (c中山大学化学与化工学院广州 510275)

投稿日期:2009-05-13 修回日期:2009-08-10 发布日期:2009-10-09
通讯作者: 王崇太 E-mail:wct581@sina.com

Electrocatalytic Degradation of Nitrobenzene with Keggin-type Fe(Ⅲ)-Substituted Heteropolyanion PW₁₁O₃₉Fe(III)(H₂O)₄₋

Hua, Yingjie^a，Wang, Chongtai^*,a,b，Tong, Yexiang^c，Zhang, Dashuai^a ，Zhang, Qi^a，Gu, Tiean^a，Hu, Pei^a

(^a School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158) (^b Key Laboratory of Tropical Medicinal Plant Chemistry of Hainan Province, Haikou 571158) (^c School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275)

Received:2009-05-13 Revised:2009-08-10 Published:2009-10-09
Contact: chongtai wang E-mail:wct581@sina.com

Abstract

A novel system constituted by Keggin-type iron-substituted heteropolytungstate anion PW11O39Fe(III)(H2O)4－ [PW11Fe] was applied to degrade nitrobenzene (NB) in a neutral aqueous solution. Experimental results showed that a complete NB degradation was obtained in less than 100 min in a pH 6.86 mixed phosphate solution containing 1.0 mmol•L－1 NB and 1.0 mmol•L－1 PW11Fe at the potential of －0.5 V and 60 mL•min－1 O2 flow rate. The observed quasi-first order rate constant kobs of NB degradation related with NB initial concentration, which was determined to be 7.18×10－2, 3.57×10－2 and 1.47×10－2 min－1 at the initial concentration of 1.0, 2.0 and 5.0 mmol•L－1, respectively. Ca. 35% TOC (total organic carbon) removal obtained at 100 min reaction time indicated that the process of NB degradation was accompanied by partial mineralization.

Key words: Fe(III)-substituted heteropolyanion, electrocatalysis, nitrobenzene degradation, mineralization

Cite this article

HUA Yang-Jie, WANG Chong-Ta, TONG Xie-Xiang, ZHANG Da-Shuai, ZHANG Ai, GU Tie-An, HU Pei. Electrocatalytic Degradation of Nitrobenzene with Keggin-type Fe(Ⅲ)-Substituted Heteropolyanion PW₁₁O₃₉Fe(III)(H₂O)₄₋[J]. Acta Chimica Sinica, 2009, 67(23): 2650-2654.

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Keggin型杂多阴离子PW₁₁O₃₉Fe(III)(H₂O)^4-电催化降解硝基苯

Electrocatalytic Degradation of Nitrobenzene with Keggin-type Fe(Ⅲ)-Substituted Heteropolyanion PW₁₁O₃₉Fe(III)(H₂O)₄₋

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Keggin型杂多阴离子PW11O39Fe(III)(H2O)4-电催化降解硝基苯