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

摘要/Abstract

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.

关键词:

Ag/AgCl')">

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')">

Ag/AgCl, ZnAl-LDH, visible light, methyl orange

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 [J]. Journal of Shenyang University of Chemical Technology, 2024, 38(2): 127-134.

参考文献

［1］EVANS D G,SLADE R C T.Structural Aspects of Layered Double Hydroxides［M］//DUAN X，EVANS D G．Layered Double Hydroxides．Berlin：Springer,2006:1-87.

［2］OH J M,BISWICK T T,CHOY J H:Layered Nanomaterials for Green Materials［J］.Journal of Materials Chemistry 2009,19(17):2553-2563.

［3］RIVES V.Layered Double Hydroxides:Present and Future［M］.New York:Nova Science Publishers,2001:75-76.

［4］XU Z P,ZHANG J,ADEBAJO M O,et al.Catalytic Applications of Layered Double Hydroxides and Derivatives［J］.Applied Clay Science,2011,53(2):139-150.

［5］刘铭,申延明,刘东斌,等.剥离法制备醋氯芬酸插层水滑石及其控制释放性能研究［J］.沈阳化工大学学报,2017,31(2):129-133.

［6］张福宁,刘东斌,申延明,等.酒石酸插层MgAl-LDHs柱撑水滑石的制备［J］.沈阳化工大学学报,2011,25(1):30-34.

［7］GOMES SILVA C,BOUIZI Y,FORNES V,et al.Layered Double Hydroxides as Highly Efficient Photocatalysts for Visible Light Oxygen Generation from Water［J］.Journal of the American Chemical Society,2009,131(38):13833-13839.

［8］XIA S J,LIU F X,NI Z M,et al.Layered Double Hydroxides as Efficient Photocatalysts for Visible-Light Degradation of Rhodamine B［J］.Journal of Colloid and Interface Science,2013,405:195-200.

［9］ABDERRAZEK K,NAJOUA F S,SRASRA E.Synthesis and Characterization of ［Zn-Al］LDH:Study of the Effect of Calcination on the Photocatalytic Activity［J］.Applied Clay Science,2016,119:229-235.

［10］LI Z,CHEN M,HU H M,et al.Mechanochemical Synthesis of Novel Pt Modified ZnAl-LDH for Effective Ciprofloxacin Photodegradation［J］.Journal of Solid State Chemistry,2020,290:121594.

［11］LAN M,FAN G L,YANG L,et al.Significantly Enhanced Visible-Light-Induced Photocatalytic Performance of Hybrid Zn-Cr Layered Double Hydroxide/Graphene Nanocomposite and the Mechanism Study［J］.Industrial & Engineering Chemistry Research,2014,53(33):12943-12952.

［12］XU D Y,RUI Y C,LI Y G,et al.Zn-Co Layered Double Hydroxide Modified Hematite Photoanode for Enhanced Photoelectrochemical Water Splitting［J］.Applied Surface Science,2015,358(Part A):436-442.

［13］XIA S J,QIAN M D,ZHOU X B,et al.Theoretical and Experimental Investigation into the Photocatalytic Degradation of Hexachlorobenzene by ZnCr Layered Double Hydroxides with Different Anions［J］.Molecular Catalysis,2017,435:118-127.

［14］HADNADJEV-KOSTIC M,VULIC T,MARINKOVIC-NEDUCIN R,et al.Photo-Induced Properties of Photocatalysts:a Study on the Modified Structural,Optical and Textural Properties of TiO₂-ZnAl Layered Double Hydroxide Based Materials［J］.Journal of Cleaner Production,2017,164:1-18.

［15］PATZKO ,KUN R,HORNOK V,et al.ZnAl-Layer Double Hydroxides as Photocatalysts for Oxidation of Phenol in Aqueous Solution［J］.Colloids and Surfaces A:Physicochemical and Engineering Aspects,2005,265(1/3):64-72.

［16］LI H P,DENG Q H,LIU J Y,et al.Synthesis,Characterization and Enhanced Visible Light Photocatalytic Activity of Bi₂MoO₆/Zn-Al Layered Double Hydroxide Hierarchical Heterostructures［J］.Catalysis Science & Technology,2014,4(4):1028-1037.

［17］HUANG G L,CHEN J L,WANG D,et al.Nb₂O₅/ZnAl-LDH Composites and Its Calcined Products forPhotocatalytic Degradation of Congo Red under Visible Light Irradiation［J］.Materials Letters,2016,173:227-230.

［18］NOCCHETTI M,DONNADIO A,AMBROGI V,et al.Ag/AgCl Nanoparticle Decorated Layered Double Hydroxides:Synthesis,Characterization and Antimicrobial Properties［J］.Journal of Materials Chemistry B,2013,1(18):2383-2393.

［19］CHEN C R,ZENG H Y,YI M Y,et al.Fabrication of Ag₂O/Ag Decorated ZnAl-Layered Double Hydroxide with Enhanced Visible Light Photocatalytic Activity for Tetracycline Degradation［J］.Ecotoxicology and Environmental Safety,2019,172:423-431.

［20］CHEN S,YANG F,CAO Z F,et al.Enhanced Photocatalytic Activity of Molybdenum Disulfide by Compositing ZnAl-LDH［J］.Colloids and Surfaces A:Physicochemical and Engineering Aspects,2020,586:124140.

［21］WANG J,LEI X F,HUANG C,et al.Fabrication of a Novel MoO₃/Zn-Al LDHs Composite Photocatalyst for Efficient Degradation of Tetracycline under Visible Light Irradiation［J］.Journal of Physics and Chemistry of Solids,2021,148:109698.

［22］YUAN X Y,LI W Y.Graphitic-C₃N₄ Modified ZnAl-Layered Double Hydroxides for Enhanced Photocatalytic Removal of Organic Dye［J］.Applied Clay Science,2017,138:107-113.

［23］安伟佳,田玲玉,芮玉兰,等.Ag@AgCl/Bi₂WO₆复合光催化剂的制备及可见光催化性能［J］.材料导报,2019,33(12):1932-1938.

［24］柯倩倩,常海洲,黄彪,等.Ag/AgCl/MoO₃复合材料的制备及其光催化性能［J］.材料科学与工程学报,2020,38(2):238-244,324.

［25］朱秋蓉,何世颖,赵晓蕾,等.AgCl/ZnO/GO光催化降解甲基橙的性能研究［J］.环境科学研究,2020,33(4):969-977.

［26］KIM S H,NGO H H,SHON H K,et al.Adsorption and Photocatalysis Kinetics of Herbicide Onto Titanium Oxide and Powdered Activated Carbon［J］.Separation and Purification Technology,2008,58(3):335-342.

［27］李明玉,尚薇,王心乐,等.光电化学协同催化降解甲基橙的研究［J］.中国环境科学,2009,29(5):512-517.

［28］YENTUR G,DUKKANCI M.Synthesis of Visible-Light Heterostructured Photocatalyst of Ag/AgCl Deposited on(040)Facet of Monoclinic BiVO₄ for Efficient Carbamazepine photocatalytic Removal［J］.Applied Surface Science,2020,531:147322.

［29］LI W B,HUA F X,YUE J G,et al.Ag@AgCl Plasmon-Induced Sensitized ZnO Particle for High-efficiency Photocatalytic Property under Visible Light［J］.Applied Surface Science,2013,285(Part B):490-497.

［30］WANG P,HUANG B B,LOU Z Z,et al.Synthesis of Highly Efficient Ag@AgCl Plasmonic Photocatalysts with Various Structures［J］.Chemistry,2010,16(2):538-544.

［31］ADENUGA D O,TICHAPONDWA S M,CHIRWA E M N.Facile Synthesis of a Ag/AgCl/BiOCl Composite Photocatalyst for Visible-Light-Driven Pollutant Removal［J］.Journal of Photochemistry and Photobiology A:Chemistry,2020,401:112747.

［32］WANG P,HUANG B B,QIN X Y,et al.Ag@AgCl:a Highly Efficient and Stable Photocatalyst Active under Visible Light［J］.Angewandte Chemie International Edition,2008,47(41):7931-7933.

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