化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (11) : 202-206. DOI: 10.19817/j.cnki.issn 1006-3536.2021.11.042

科学研究

SnO₂/RGO半导体复合物光化学合成及对Cr(Ⅵ)光催化还原性能研究

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Photochemical synthesis of SnO₂/RGO compound with excellent photocatalytic performance for Cr(Ⅵ) reduction

Zou Hongli¹, Wu Jianheng¹, Zeng Zhaoming¹, Gong Yulian¹, Sun Fengqiang²

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Received		Published
2020-07-18		2021-11-20
Issue Date	Revised Date
2021-12-13	2020-07-18

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摘要

利用光化学合成法制备了SnO₂和SnO₂/RGO两种半导体材料。通过X射线衍射(XRD)、扫描电镜(SEM)等对材料进行表征,并研究了它们对Cr(Ⅵ)的光催化还原性能。结果表明,SnO₂/RGO对Cr(Ⅵ)表现出比SnO₂更好的光催化还原性能。催化动力学研究发现,SnO₂/RGO的表观速率常数几乎是SnO₂的4倍,体现了SnO₂/RGO比SnO₂更为优异的催化特性。紫外可见漫反射光谱分析发现,SnO₂和SnO₂/RGO都具有对可见光的响应性能,可作为有前景的吸收可见光的光催化剂。

Abstract

Stannic oxide(SnO₂)and SnO₂/reduced graphene oxide(RGO)were synthesized by a photochemical synthesis method,and characterized by XRD and SEM.The photocatalytic tests showed that SnO₂/RGO compound had far higher photocatalytic activity than SnO₂ in the reduction of aqueous Cr(Ⅵ) under ultraviolet light irradiation.The reaction rate constant for photocatalytic reduction of Cr(Ⅵ) by SnO₂/RGO was about 4 times that by SnO₂.The UV-Vis diffuse reflectance spectra found that SnO₂ and SnO₂/RGO displayed significant absorption of light with the wavelength of 400～800nm,suggesting that SnO₂ and SnO₂_/RGO would be used as promising photocatalysts for absorbing visible light.

关键词

光化学合成 / 氧化锡/还原氧化石墨烯 / 光催化还原 / 六价铬

Key words

photochemical synthesis / SnO₂/RGO / photocatalytic reduction / Cr(Ⅵ)

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SnO₂/RGO半导体复合物光化学合成及对Cr(Ⅵ)光催化还原性能研究[J]. 化工新型材料, 2021, 49(11): 202-206 DOI:10.19817/j.cnki.issn 1006-3536.2021.11.042

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参考文献

原文顺序 | 出版日期 | 本文引用

[1] 李俊,贾庆明,姚凯丽,等.SnO₂光催化材料的研究进展[J].化工新型材料,2018,46(6):48-52.
[2] Zhou X,Zhou T,Hu J,et al.Controlled strategy to synthesize SnO₂ decoratedSnS₂nanosheets with enhanced visible light photocatalytic activity[J].Crystengcomm,2012,14:5627-5633.
[3] Yang Y,Yang X A,Leng D,et al.Fabrication of g-C₃N₄/SnS₂/SnO₂ nanocomposites for promoting photocatalytic reduction of aqueous Cr(Ⅵ) under visible light[J].Chem Eng J,2018,335:491-500.
[4] Zhang Y C,Yao L,Zhang G,et al.One-step hydrothermal synthesis of high-performance visible-light-driven SnS₂/SnO₂nanoheterojunctionphotocatalystfor the reduction of aqueous Cr(Ⅵ)[J].Appl Catal B-Environ,2014,144:730-738.
[5] Luo Q,Wang L,Wang D.Preparation,characterization and visible-light photo-catalytic performances of composite films prepared from polyvinyl chloride andSnO₂ nanoparticles[J].J Environ Chem Eng,2015,3:622-629.
[6] Enesca A,Yamaguchi Y,Terashima C,et al.Enhanced UV-Visphotocatalytic performance of the CuInS₂/TiO₂/SnO₂ hetero-structure for air de-contamination[J].J Catal,2017,350:174-181.
[7] Huang M,Yu S,Li B,et al.Influence of preparation methods on thestructure and catalytic performance of SnO₂-doped TiO₂ photocatalysts[J].Ceramics International,2014,40(8):13305-13312.
[8] 孙丰强,陈颖.三维结构化石墨烯及其复合材料[J].华南师范大学学报,2016,48(5):19-24.
[9] Chen Y,Sun F Q,Huang Z J,et al.Photochemical fabrication of SnO₂ dense layers on reduced graphene oxide sheets for application in photocatalytic degradation of p-nitrophenol[J].Appl.Catal B-Environ,2017,215:8-17.
[10] Kulkarni D D,Choi I,Singamaneni S S,et al.Graphene oxide polyelectrolyte nanomembranes[J].ACS Nano,2010,4:4667-4676.
[11] Cheng X W,Liu H L,Chen Q H,et al.Preparation of graphene filmdecorated TiO₂ nano-tube array photoelectrode and its enhanced visible light photocatalytic mechanism[J].Carbon,2014,66:450-458.
[12] Sher Shah M S A,Park A R,Zhang K,et al.Green synthesis of biphasic TiO₂-reduced graphene oxide nanocomposites with highly enhanced photocatalytic activity[J].ACS applied materials & interfaces,2012,4(8):3893-3901.
[13] Bai H,Xu Y,Zhao L,et al.Non-covalent functionalization of graphene sheets by sulfonated polyaniline[J].Chemical Communications,2009,13:1667-1669.
[14] Li N,Tian Y,Zhao J,et al.Efficient removal of chromium from water by Mn₃O₄@ZnO/Mn₃O₄ composite under simulated sunlight irradiation:synergy of photocatalytic reduction and adsorption[J].Appl Catal B-Environ,2017,214:12636.
[15] Yang X,Zhang Y,Zhang Y C,et al.Modification of SnO₂ nanoparticles by conjugated derivative of polyvinyl chloride for efficient photocatalytic reduction of Cr(Ⅵ) under visible-light[J].Materials Letters,2018,218:173-176.
[16] Lu D,Chai W,Yang M.Visible light induced photocatalytic removal of Cr(Ⅵ) over TiO₂-based nanosheets loaded with surface-enriched CoO_x nanoparticles and its synergism with phenol oxidation[J].Appl Catal B-Environ,2016,190:44-65.
[17] 黄锦勇,刘国光,张万辉,等,TiO₂光催化还原重金属离子的研究进展[J].环境科学与技术,2008,31(12):104-108.
[18] Xu T G,Zhang L W,Cheng H Y,et al.Significantly enhanced photocatalytic performance of ZnO via graphene hybridization and the mechanism study[J].Appl Catal B Environ,2011,101:382-387.
[19] Ji Q H,Yu D W,Zhang G,et al.Microfluidic flow through polyaniline supported by lamellar-structured grapheme for mass-transfer-enhanced electrocatalytic reduction of hexavalent chromium[J].Environ Sci Technol,2015,49:13534-13541.
[20] Sreekantan S,Lai C W,Mohd Zaki S.The influence of lead concentration on photocatalytic reduction of Pb(Ⅱ) ions assisted by Cu-TiO₂ nanotubes[J].International Journal of Photoenergy,2014,2014:1-7.
[21] Ding J,Ming J,Lu D,et al.Study of the enhanced visible-light-sensitive photocatalytic activity of Cr₂O₃-loadedtitanatenanosheets for Cr(Ⅵ) degradation and H₂ generation[J].Catal Sci Technol,2017,7:2283-2297.
[22] Wang N,Zhu L,Tang H.Visible light photocatalytic reduction of Cr(Ⅵ) on TiO₂ in situ modified with small molecular weight organic acids[J].Appl Catal B-Environ,2010,95:400-407.
[23] Zhang L,Niu C G,Liang C,et al.One-step in situ synthesis of CdS/SnO₂ heterostructure with excellent photocatalytic performance for Cr(Ⅵ) reduction and tetracycline degradation[J].Chemical Engineering Journal,2018,352:863-875.
[24] Li J,Peng T X,Zhang Y C,et al.Polyaniline modified SnO₂ nanoparticles for efficient photocatalytic reduction of aqueous Cr(Ⅵ) under visible light[J].Separation and Purification Technology,2018,201:120-129.