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Citation: LI Mengting, LIU Haicheng, ZENG Xing, XU Xiaonan, ZOU Xiaomei, HUA Yingjie, WANG Chongtai. Visible Light Catalysis of Keggin-type Cr-Substituted Heteropolyanion/Anion Exchange Resin[J]. Chinese Journal of Applied Chemistry, ;2014, 31(8): 965-970. doi: 10.3724/SP.J.1095.2014.30533 shu

Visible Light Catalysis of Keggin-type Cr-Substituted Heteropolyanion/Anion Exchange Resin

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

Corresponding author: HUA Yingjie, WANG Chongtai,
Received Date: 28 October 2013
Available Online: 9 January 2014
Fund Project: 国家自然科学基金资助项目(21161007) (21161007)海南省国际科技合作项目(2012-GH004,KJHZ2014-08) (2012-GH004,KJHZ2014-08)海南省重点科技计划项目(ZDXM20130088,ZDXM2014099) (ZDXM20130088,ZDXM2014099)国家大学生创新项目(201211658041) (201211658041)

A solid photocatalyst of Keggin-type Cr(Ⅲ) substituted heteropolytungstates immobilized on the surface of alkalescent anionic exchange resin D301R(PW₁₁Cr/D301R) was prepared. Its visible light photocatalytic activity was assessed through the degradation of a model pollutant rhodamine B(RhB). The photocatalysis mechanism was discussed and influences of the PW₁₁Cr/D301R dosage,the solution pH and the common anions existing in solution on the photocatalytic degradation rate of RhB were also examined. The time required to achieve a complete degradation of RhB is only 30 min in the presence of 100 mg PW₁₁Cr/D301R when a solution containing 10 μmol/L RhB is exposed to irradiation of the 200 W metal halide lamp. This process is three times faster than that in the PW₁₁Cr homogeneous system. Approximate 84% of the total organic carbon(TOC) removal is reached at 180 min. The PW₁₁Cr/D301R dosage,the solution pH,and existing anion such as Cl^-,SO₄^2- or PO₄^3- all have an obvious influence on the photocatalytic degradation rate of RhB. There is no obvious lost of photocatalytic activity of PW₁₁Cr/D301R after seven repetitive uses.
- Cr(Ⅲ)-substituted heteropolyanion,
- visible photocatalyst,
- rhodamine B degradation,
- total organic carbon,
- D301R resin
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