高大方, 张刚. 复合光催化剂AgCl/AgBr降解水中四溴双酚A的研究[J]. 华南师范大学学报(自然科学版), 2019, 51(2): 50-55. doi: 10.6054/j.jscnun.2019024
引用本文: 高大方, 张刚. 复合光催化剂AgCl/AgBr降解水中四溴双酚A的研究[J]. 华南师范大学学报(自然科学版), 2019, 51(2): 50-55. doi: 10.6054/j.jscnun.2019024
GAO Dafang, ZHANG Gang. Photocatalytic Degradation of Tetrabromobisphenol A with Composite AgCl/AgBr[J]. Journal of South China Normal University (Natural Science Edition), 2019, 51(2): 50-55. doi: 10.6054/j.jscnun.2019024
Citation: GAO Dafang, ZHANG Gang. Photocatalytic Degradation of Tetrabromobisphenol A with Composite AgCl/AgBr[J]. Journal of South China Normal University (Natural Science Edition), 2019, 51(2): 50-55. doi: 10.6054/j.jscnun.2019024

复合光催化剂AgCl/AgBr降解水中四溴双酚A的研究

Photocatalytic Degradation of Tetrabromobisphenol A with Composite AgCl/AgBr

  • 摘要: 通过简单易行的沉淀工艺制造了具有优异光催化性能的AgCl/AgBr复合光催化剂. X射线衍射(XRD),扫描电子显微镜(SEM),能量色散X射线光谱(EDX)和紫外可见漫反射光谱对该材料的结晶结构、形貌特征和光吸收特性进行了表征,并且在可见光驱动下降解水中四溴双酚A (TBBPA). 结果表明,AgCl/AgBr具有优异的光催化活性,反应30 min后的降解率达98.49%,最后探讨了AgCl/AgBr复合材料可能的光催化机理,发现 ?OH和 ?O2 ? 是主要活性物质,并且在反应过程中有效地阻止了电子空穴对的复合,使材料表现出优异的光催化性能.

     

    Abstract: An efficient visible-light-driven AgCl/AgBr composite photocatalyst was fabricated through a simple precipitation process. The crystal structure, morphology and light absorption properties of the silver matrix composite were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX) and UVvis diffuse reflection spectroscopy (DRS). The as-prepared AgCl/AgBr composite was used to degradate tetrabromobisphenol A under visible-light irradiation. It is found that AgCl/AgBr could degradate TBBPA almost completely in 30min and the degradation rate was 98.49%. Finally, the possible photocatalytic mechanism of the AgCl/AgBr composite was discussed, and it was found that ?OH and ?O2 ? were the main active materials and the photocatalyst prevented the recombination of electron-hole pairs during the reaction, which contributed to the excellent performance of the photocatalytic activity.

     

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