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Citation: WU Chunyan, LIU Xilong, SHEN Guoying, HUANG Wenshi, MAO Dan, HUA Yingjie, WANG Chongtai. Visible Photocatalytic Degradation of Rhodamine B Using Copper-Substituted Tungstophosphate Heteropolyanion[J]. Chinese Journal of Applied Chemistry, ;2012, 29(9): 1030-1035. doi: 10.3724/SP.J.1095.2012.00480 shu

Visible Photocatalytic Degradation of Rhodamine B Using Copper-Substituted Tungstophosphate Heteropolyanion

1.
School of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China

Corresponding author: WANG Chongtai,
Received Date: 1 November 2011
Available Online: 20 January 2012
Fund Project: 海南省重点科技项目(090803) (090803)吉林省科技发展计划项目(20090595) (20090595)海南省教育厅高等学校科研基金项目(HjKj2011-24) (HjKj2011-24)海南师范大学开放实验室项目(kfsy11017) (kfsy11017)国家大学生创新性实验计划(101165811) (101165811)

Using Keggin-type copper-substituted heteropolyanion PW₁₁O₃₉Cu(Ⅱ)(H₂O)^5-(PW₁₁Cu) as a visible photocatalyst,and organic dye Rhodamine B(RhB) as a model pollutant,this work reports a study on the visible photocatalysis of PW₁₁Cu towards RhB degradation in aqueous solution under visible light irradiation.A visible photocatalysis mechanism is proposed.At the same time,influences of the initial RhB concentration,the initial PW₁₁Cu concentration and the solution pH on the degradation rate of RhB are also examined.Experimental results show that 100% of RhB degradation is reached at 80 min under visible light irradiation of a solution containing 15.6 μmol/L PW₁₁Cu and 10 μmol/L RhB,and a total organic carbon removal is about 33%.The visible photocatalytic degradation of RhB follows the quasi-first order kinetic regime and the observed rate constant is estimated to be 3.1×10^-2,2.0×10^-2 and 1.5×10^-2 min^-1 corresponding to the initial RhB concentration of 20,30 and 40 μmol/L,respectively.
- copper-substituted heteropolyanion,
- homogeneous photocatalysis,
- degradation of Rhodamine B,
- total organic carbon
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