Ag/AgBr-硅藻土复合光催化剂的制备及其可见光光催化性能

doi:10.16085/j.issn.1000-6613.2016-2385

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

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 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 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/Abstract

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

中图分类号:

O643

龚久炎, 宋文东, 陈嘉琳, 李世杰, 蔡璐, 纪丽丽. Ag/AgBr-硅藻土复合光催化剂的制备及其可见光光催化性能[J]. 化工进展, 2017, 36(09): 3309-3315.

GONG Jiuyan, SONG Wendong, CHEN Jialin, LI Shijie, CAI Lu, JI Lili. Ag/AgBr-diatomaceous earth composite photocatalysts with superior photocatalytic performance under visible-light irridiation[J]. Chemical Industry and Engineering Progress, 2017, 36(09): 3309-3315.

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Ag/AgBr-硅藻土复合光催化剂的制备及其可见光光催化性能

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

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