科学研究

溴化银/碳酸银复合光催化剂的制备及其光催化性能研究

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  • 广西农产资源化学与深度利用重点实验室,广西高校桂东南特色农产资源高效利用重点实验室,玉林师范学院化学与食品科学学院,玉林537000
陶萍芳(1982-),女,硕士,主要从事无机功能材料研究,E-mail:tpf005@126.com。

收稿日期: 2020-12-08

  修回日期: 2021-04-09

  网络出版日期: 2021-06-29

基金资助

国家自然科学基金(21961042);广西创新驱动发展专项资金项目(桂科AA18242015);玉林师范学院市校合作项目(YLSXZD2019017);玉林师范学院大学生创新创业训练计划项目(202010606037和202010606145)

Preparation and property of AgBr/Ag2CO3 composite photocatalyst

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  • Guangxi Key Laboratory for Agricultural Resources Chemistry and Efficient Utilization,Colleges and Universities Key Laboratory for Efficient Use of Agricultural Resources in the Southeast of Guangxi,College of Chemistry and Food Science,Yulin Normal University,Yulin 537000

Received date: 2020-12-08

  Revised date: 2021-04-09

  Online published: 2021-06-29

摘要

以十六烷基三甲基溴化铵(CTAB)为溴源,采用简单的一步共沉淀法合成AgBr/Ag2CO3复合光催化剂,并利用粉末衍射(XRD)、扫描电镜(SEM)、紫外漫反射(UV-Vis DRS)、荧光光谱(PL)和紫外可见光分光光度计等进行表征。以亚甲基蓝溶液为模拟染料进行光催化降解实验,探讨了反应时间、复合物质量比对样品催化性能的影响。结果表明:AgBr的光生电子易迁移到Ag2CO3表面,使复合催化剂稳定性增强,表现出比单一AgBr或Ag2CO3更优越的光催化性能。共沉淀反应时间为1h,加入0.3g CTAB合成的AgBr/Ag2CO3样品在用量为0.08g时降解200mL 10mg/L亚甲基蓝溶液30min后,降解率达到99.19%,第3次循环降解,其降解率仍高达60.91%,循环利用率高。

本文引用格式

陶萍芳, 覃利琴, 秦荣欢, 吴秀花, 黄花粉, 黄国保, 王荣芳, 刘敏, 林韦 . 溴化银/碳酸银复合光催化剂的制备及其光催化性能研究[J]. 化工新型材料, 2021 , 49(6) : 201 -205 . DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.044

Abstract

AgBr/Ag2CO3 composite as photocatalyst was synthesized via a facile one-step coprecipitation method by adding different contents of CTAB as Br source,and characterized by XRD,SEM,UV-Vis DRS and PL.The photocatalytic activity of the as-synthesized AgBr/Ag2CO3 composite were explored by the removal of the photocatalytic degradation of methylene blue(MB) aqueous solution under illumination of visible-light.The effects of coprecipitation time and quality added of CTAB on the catalytic performance of the samples were also investigated.The results revealed that AgBr/Ag2CO3 composite shown a superior photocatalytic behavior than those of the single-phase AgBr or Ag2CO3 due to the photo-produced e- of AgBr may be transferred into Ag2CO3.Among these composites,0.08g AgBr/Ag2CO3 composite obtained with 0.3g CTAB,and co-precipitation time of 1h,shown the highest degradation rate with 99.19% removal efficiency of MB within 30min.More importantly,the recycling tests proved that the degradation rate of methylene blue can reached 60.91% after cycled for three times.

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