Electrocatalytic Degradation of Nitrobenzene by Keggin-type Lacunary Heteropolyanion
PW11O397
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Acta Chimica Sinica ›› 2010, Vol. 68 ›› Issue (19): 1961-1964. Previous Articles Next Articles

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Keggin型缺位杂多阴离子PW₁₁O₃₉⁷^-电催化降解硝基苯

王崇太¹，华英杰*^{,1，韦吉崇¹，麦发刚¹，张大帅¹，童叶翔²}

(¹海南师范大学化学与化工学院海口 571158)
(²中山大学化学与化工学院广州 510275)

投稿日期:2009-10-09 修回日期:2010-05-29 发布日期:2010-06-07
通讯作者: 王崇太 E-mail:wct581@sina.com
基金资助:
国家自然科学资金项目（No.20963003）; 海南省重点科技项目（No.080305; No.090803）;吉林省科技发展计划项目（No.20090595）

Electrocatalytic Degradation of Nitrobenzene by Keggin-type Lacunary Heteropolyanion PW₁₁O₃₉⁷ ^-

Wang Chongtai¹ Hua Yingjie*^{,1 Wei Jichong¹ Mai Fagang¹ Zhang Dashuai¹ Tong Yexiang²}

(¹School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158)
(²School of Chemistry and Chemical Engineering, Sun Yat-sen University, Guangzhou 510275)

Received:2009-10-09 Revised:2010-05-29 Published:2010-06-07
Contact: chongtai wang E-mail:wct581@sina.com

Abstract

With Keggin-type lacunary heteropolytungstate anion as an electrocatalyst and nitrobenzene (NB) as a model pollutant the electrocatalytic degradation of NB by in Na₂SO₄＋NaHSO₄medium was studied. Experimental results revealed that a complete NB degradation was obtained in less than 80 min in pH 2.5 Na₂SO₄-NaHSO₄ solution containing 0.5 mmol•L^－1 NB at the potential of －0.6 V and the O₂ flow rate of 60 mL•min^－1. A total organic carbon (TOC) removal reached 42% at 120 min reaction time. The NB degradation reaction followed the pseudo-first order kinetic regime and the observed rate constants k_obsrelated to the initial NB concentration at room temperature was determined to be 1.0×10^－1, 6.0×10^－2 and 4.1×10^－2 min^－1 corresponding to 0.5, 0.9 and 1.3 mmol•L^－1 initial NB concentrations, respectively.

Key words: lacunary heteropolyanion, electrocatalysis, nitrobenzene degradation, mineralization rate

Cite this article

WANG Chong-Tai, HUA Ying-Jie, WEI Ji-Chong, MAI Fa-Gang, ZHANG Da-Shuai, TONG Ye-Xiang. Electrocatalytic Degradation of Nitrobenzene by Keggin-type Lacunary Heteropolyanion PW₁₁O₃₉⁷ ^-[J]. Acta Chimica Sinica, 2010, 68(19): 1961-1964.

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Keggin型缺位杂多阴离子PW₁₁O₃₉⁷^-电催化降解硝基苯

Electrocatalytic Degradation of Nitrobenzene by Keggin-type Lacunary Heteropolyanion PW₁₁O₃₉⁷ ^-

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Keggin型缺位杂多阴离子PW11O397-电催化降解硝基苯