溴化银/碳酸银复合光催化剂的制备及其光催化性能研究  

Preparation and property of AgBr/Ag_(2)CO_(3) composite photocatalyst

作　　者：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 Tao Pingfang;Qin Liqin;Qin Ronghuan;Wu Xiuhua;Huang Huafen;Huang Guobao;Wang Rongfang;Liu Min;Lin Wei(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)

机构地区：[1]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

出　　处：《化工新型材料》2021年第6期201-205,共5页New Chemical Materials

基　　金：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)。

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/Ag_(2)CO_(3)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Ag_(2)CO_(3)表面,使复合催化剂稳定性增强,表现出比单一AgBr或Ag_(2)CO_(3)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/Ag_(2)CO_(3)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。AgBr/Ag_(2)CO_(3)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/Ag_(2)CO_(3)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/Ag_(2)CO_(3)composite shown a superior photocatalytic behavior than those of the single-phase AgBr or Ag_(2)CO_(3)due to the photo-produced e-of AgBr may be transferred into Ag_(2)CO_(3).Among these composites,0.08g AgBr/Ag_(2)CO_(3)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.

关 键 词：溴化银/碳酸银复合光催化剂 一步沉淀合成法 异质结 光催化 

分 类 号：TQ321[化学工程—合成树脂塑料工业] O643[理学—物理化学]