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Ag@AgCl 催化剂的制备及可见光降解三聚氰胺

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胡学锋, 张锐明, 秦伟. Ag@AgCl 催化剂的制备及可见光降解三聚氰胺[J]. 环境化学, 2012, 31(5): 636-640.
引用本文: 胡学锋, 张锐明, 秦伟. Ag@AgCl 催化剂的制备及可见光降解三聚氰胺[J]. 环境化学, 2012, 31(5): 636-640.
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HU Xuefeng, ZHANG Ruiming, QIN Wei. Preparation of Ag@AgCl and visible light-catalyzed degradation of melamine[J]. Environmental Chemistry, 2012, 31(5): 636-640.
Citation: HU Xuefeng, ZHANG Ruiming, QIN Wei. Preparation of Ag@AgCl and visible light-catalyzed degradation of melamine[J]. Environmental Chemistry, 2012, 31(5): 636-640.
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Ag@AgCl 催化剂的制备及可见光降解三聚氰胺

  • 1.

    中国科学院烟台海岸带研究所海岸带环境过程重点实验室, 烟台, 264003

  • 基金项目:

    国家自然科学基金项目(41076040, 20807036)

    中科院重要方向性项目(KZCX2-YW-JS208)

    烟台市科技攻关项目(2010160)资助.

Preparation of Ag@AgCl and visible light-catalyzed degradation of melamine

  • 1.

    Key Laboratory of Coastal Zone Environmental Processes, CAS; Shandong Provincial Key Laboratory of Coastal Zone Environmental Processes; Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China

  • Fund Project:

  • 摘要: 在超声波辅助作用下制备了Ag@AgCl可见光催化剂,采用紫外可见分光光度计、扫描电镜(SEM)对该催化剂进行了表征,该催化剂在可见光区有较强的吸收,粒径在微米级.以三聚氰胺为模型化合物测试其可见光催化性能.研究发现,该催化剂在可见光照下,不仅可以使三聚氰胺发生脱氨基反应,而且能使其环结构破坏,但却不能催化氰脲酸降解.通过除氧实验、空穴捕获、顺磁共振等实验测试,对其可能的催化降解机理进行了探讨.
    Abstract: Ag@AgCl was prepared by a supersonic assisted method. UV-Vis spectroscopy and scanning electron microscope were used to analyze the catalyst. The catalyst showed strong absorption in the visible region with diameters around 2 μm. Melamine as a model compound was used to measure the photocatalytic activity of Ag@AgCl. The results showed that this particle catalyzed not only the deamination but also the ring-open of melamine. ESR, hole capture and deoxygenation experiments were used to investigate the degradation mechanism of melamine.
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    [2] Vuliet E, Emmelin C, Chovelon J M, et al. Photocatalytic degradation of sulfonylurea herbicides in aqueous TiO2 [J]. Appl Catal B: Environ, 2002, 38(2): 127-137
    [3] 赵丹,孙春燕,陈春城,等.新型污染物多溴联苯醚和氰脲酸的光化学降解 [J].化学进展,2009,21(2/3): 400

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    [4] Watanabe N, Horikoshi S, Hidaka H, et al. On the recalcitrant nature of the triazinic ring species, cyanuric acid, to degradation in Fenton solutions and in UV-illuminated TiO2 (naked) and fluorinated TiO2 aqueous dispersions [J]. Photochem Photobiol A: Chem, 2005, 174(1): 229-238
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    [8] Wang P, Huang B B, Qin X Y, et al. Ag@AgCl: A highly efficient and stable photocatalyst active under visible light [J]. Angew Chem Int Ed, 2008, 47: 1-4
    [9] Zhang H, Fan X F, Quan X, et al. Graphene sheets grafted Ag@AgCl hybrid with enhanced plasmonic photocatalytic activity under visible light [J]. Environ Sci Technol, 2011, 45: 5731-5736
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  • 收稿日期:  2011-09-21

Ag@AgCl 催化剂的制备及可见光降解三聚氰胺

  • 1. 中国科学院烟台海岸带研究所海岸带环境过程重点实验室, 烟台, 264003
  • 收稿日期:  2011-09-21
基金项目:

国家自然科学基金项目(41076040, 20807036)

中科院重要方向性项目(KZCX2-YW-JS208)

烟台市科技攻关项目(2010160)资助.

摘要: 在超声波辅助作用下制备了Ag@AgCl可见光催化剂,采用紫外可见分光光度计、扫描电镜(SEM)对该催化剂进行了表征,该催化剂在可见光区有较强的吸收,粒径在微米级.以三聚氰胺为模型化合物测试其可见光催化性能.研究发现,该催化剂在可见光照下,不仅可以使三聚氰胺发生脱氨基反应,而且能使其环结构破坏,但却不能催化氰脲酸降解.通过除氧实验、空穴捕获、顺磁共振等实验测试,对其可能的催化降解机理进行了探讨.

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