Ag/AgCl/ZnAl-LDH催化剂可见光降解甲基橙

doi:10.3969/j.issn.2095-2198.2024.02.006

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摘要采用Ag/AgCl复合ZnAl-LDH制备Ag/AgCl/ZnAl-LDH可见光催化剂，利用XRD、SEM、TEM、BET和UV-Vis对制备的样品进行表征.结果表明：制备的ZnAl-LDH具有典型的水滑石结构，而AgCl覆盖在ZnAl-LDH的表面.活性测试结果表明：在AgCl负载量（质量分数）为25%，甲基橙质量浓度为25 mg/L，催化剂添加量为1 g/L的条件下，可见光光照180 min后，甲基橙的降解率达到95.2%.光催化机理推断为光照下AgCl表面形成的Ag簇吸收可见光，产生电子-空穴，AgCl作为光生电子和空穴分离的载体将其分别转化为·O^-2和Cl·，进而氧化甲基橙，而ZnAl-LDH为Ag/AgCl提供了负载的基底材料.反应过程中吸附和动力学均起到一定的作用.

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Ag/AgCl')" href="#">

Ag/AgCl ZnAl-LDH 可见光甲基橙

Abstract:

Coupling ZnAl-LDH,with Ag/AgCl/to synthesize Ag/AgCl/ZnAl-LDH composite photocatalyst.The samples were characterized by XRD,SEM,TEM,BET and UV-Vis.The characterization results showed that the prepared AgCl loaded with ZnAl-LDH had a typical hydrotalcite structure,on which AgCl particles loaded.The photocatalytic activity test result showed that the methyl orange(MO)degradation percentage of 95.2% under the conditions of 25% AgCl loading,was obtained under visible light irradiation of 180 min at the MO concentration of 25 mg/L and catalyst dosage of 1 g/L.The photocatalytic mechanism is deduced as following:under irradiation of visible light,Ag clusters are formed on the surface of AgCl,and in turn the electrons and holes are produced on Ag clusters,and then transfer to AgCl particles,forming ·O^-2 and ·Cl active radicals,respectively,and then oxidize MO for decomposition.While ZnAl-LDH provides the substrate for Ag/AgCl particles.In the photocatalytic reaction process,both adsorption and kinetics affect the degradation of MO.

Key words: Ag/AgCl')" href="#">

Ag/AgCl ZnAl-LDH visible light methyl orange

出版日期: 2024-04-30 发布日期: 2025-01-02 整期出版日期: 2024-04-30

通讯作者: 申延明

作者简介: 阎美新（1992—），女，吉林榆树人，硕士研究生在读，主要从事光催化催化剂的研究.

引用本文:

阎美新, 索红月, 申延明, 刘东斌, 樊丽辉.

Ag/AgCl/ZnAl-LDH催化剂可见光降解甲基橙 [J]. 沈阳化工大学学报, 2024, 38(2): 127-134.
YAN Meixin, SUO Hongyue, SHEN Yanming, LIU Dongbin, FAN Lihui.

Degradation of Methyl Orange under Visible-Light on Ag/AgCl/ZnAl-LDH . Journal of Shenyang University of Chemical Technology, 2024, 38(2): 127-134.

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https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2024.02.006 或 https://xuebao.syuct.edu.cn/CN/Y2024/V38/I2/127

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