化工进展 ›› 2017, Vol. 36 ›› Issue (09): 3309-3315.DOI: 10.16085/j.issn.1000-6613.2016-2385

• 工业催化 • 上一篇    下一篇

Ag/AgBr-硅藻土复合光催化剂的制备及其可见光光催化性能

龚久炎1, 宋文东1, 陈嘉琳2, 李世杰3, 蔡璐4, 纪丽丽3   

  1. 1 浙江海洋大学石化与能源工程学院, 浙江 舟山 316022;
    2 浙江海洋大学海洋科学与技术学院, 浙江 舟山 316022;
    3 浙江海洋大学创新应用研究院, 浙江 舟山 316022;
    4 东华大学环境科学与工程学院, 上海 201620
  • 收稿日期:2016-12-23 修回日期:2017-03-21 出版日期:2017-09-05 发布日期:2017-09-05
  • 通讯作者: 宋文东,博士,教授,从事海洋资源高值化利用研究;李世杰,博士,助理研究员,从事光催化技术用于环境水体修复研究。
  • 作者简介:龚久炎(1992-),男,硕士研究生,从事海洋资源高值化利用研究。E-mail:1677479768@qq.com
  • 基金资助:
    浙江省自然科学基金(LQ15E090006)、浙江省自然科学基金(LQ16D060004)、舟山科技计划(2015C41013)及浙江海洋学院科研启动经费项目(21025011013)。

Ag/AgBr-diatomaceous earth composite photocatalysts with superior photocatalytic performance under visible-light irridiation

GONG Jiuyan1, SONG Wendong1, CHEN Jialin2, LI Shijie3, CAI Lu4, JI Lili3   

  1. 1 College of Petrochemical and Energy Engineering, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China;
    2 College of Marine Science and Technology, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China;
    3 Innovation & Application Institute, Zhejiang Ocean University, Zhoushan 316022, Zhejiang, China;
    4 College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
  • Received:2016-12-23 Revised:2017-03-21 Online:2017-09-05 Published:2017-09-05

摘要: 采用沉积-沉淀-光还原法制备了Ag/AgBr-硅藻土复合光催化剂。利用红外光谱(FTIR)、X射线衍射(XRD)、扫描电镜(SEM)、紫外-可见漫反射光谱(UV-vis DRS)技术对产物进行了表征,测试了Ag/AgBr-硅藻土复合光催化剂在可见光下(λ>420nm)对罗丹明B(RhB)的光催化降解性能。基于自由基捕获实验探讨了Ag/AgBr-硅藻土复合光催化剂催化降解RhB过程中的主要活性成分以及光催化降解RhB的机理。结果表明,当Ag/AgBr与硅藻土质量比为4:1时,Ag/AgBr-硅藻土复合催化剂具有最高的光催化活性,光照60min后,RhB的降解效率高达83.1%。机理研究表明h+和·O2-在降解RhB过程中为主要活性成分。

关键词: 银, 溴化银, 硅藻土, 可见光, 催化剂

Abstract: Ag/AgBr-diatomaceous earth composite photocatalysts were prepared by a deposition-photoreduction method. The synthesized samples were characterized by FTIR spectroscopy(FTIR),X-ray diffraction(XRD),scanning electron microscopy(SEM)and UV-vis diffuse spectroscopy(DRS). The photocatalytic activity and stability of the prepared samples were evaluated by the degradation of RhB under visible-light(λ>420nm)irradiation. Moreover,trapping experiments were performed to investigate its photocatalytic mechanism. The results showed that the Ag/AgBr-diatomaceous earth composite with the mass ratio of Ag/AgBr to diatomaceous earth of 4:1 exhibited the highest activity,and the RhB degradation efficiency within 60min reached 83.1%. The main active species were revealed to be h+ and·O2-.

Key words: silver (Ag), silver bromide (AgBr), diatomaceous earth, visible light, catalyst

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