化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (6) : 201-205. DOI: 10.19817/j.cnki.issn 1006-3536.2021.06.044

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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Preparation and property of AgBr/Ag₂CO₃ composite photocatalyst

Tao Pingfang, Qin Liqin, Qin Ronghuan, Wu Xiuhua, Huang Huafen, Huang Guobao, Wang Rongfang, Liu Min, Lin Wei

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Received		Published
2020-12-08		2021-06-20
Issue Date	Revised Date
2021-06-29	2020-12-08

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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。

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.

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

Key words

AgBr/Ag₂CO₃ composite photocatalyst / one-step coprecipitation method / heterojunction / photocatalysis

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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

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