Heterogeneous photocatalytic degradation of pesticides using decatungstate intercalated macroporous layered double hydroxides
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- 作者：Eliana S. Da Silva ; Vanessa Prevot…
- 关键词：Photodegradation ; Decatungstate ; Layered double hydroxide ; Macroporosity ; Pesticide
- 刊名：Environmental Science and Pollution Research
- 出版年：2014
- 出版时间：October 2014
- 年：2014
- 卷：21
- 期：19
- 页码：11218-11227
- 全文大小：1,330 KB
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Vanessa Prevot (1) (2)
Claude Forano (1) (2)
Pascal Wong-Wah-Chung (1) (2)
Hugh D. Burrows (3)
Mohamed Sarakha (1) (2)
1. Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000, Clermont-Ferrand, France
2. CNRS, UMR 6296, ICCF, 63171, Aubiere, France
3. Department of Chemistry, University of Coimbra, Rua Larga, 3004-535, Coimbra, Portugal - ISSN：1614-7499
文摘
Decatungstate W10O32 4?/sup> was efficiently intercalated between the layers of three-dimensionally ordered macroporous Mg2Al-layered double hydroxide. The structural and textural properties of as-prepared intercalated compound were characterized using different solid-state characterization techniques such as X-ray powder diffraction, FTIR and Raman spectroscopies and electronic microscopy. The photocatalytic properties of immobilized W10O32 4?/sup> within Mg2Al structure were investigated using 2-(1-naphthyl) acetamide (NAD) as a model of pesticide. The influence of different parameters such as amount of catalyst, pH and oxygen concentration were investigated. An optimal NAD degradation was obtained for a photocatalyst concentration of 60?mg?l?. Under our experimental conditions, this heterogeneous photocatalyst induces photodegradation of 60?% of NAD after 17?h of irradiation at 365?nm and at pH 6.6. Interestingly, pesticide photodegradation leads to the mineralization of substrates to H2O and CO2 and the photocatalyst can be recycled and reused without any loss of activity over four cycles.