六角型Cu_2O/Au复合材料的合成及光催化性能研究
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摘要
以乙酸铜、抗坏血酸和氢氧化钠为原料,在常温条件下合成六角形Cu_2O。以AuCl_3为金源、以六角形Cu_2O为基材,通过AuCl_3与Cu_2O的置换反应,合成了六角形Cu_2O/Au的复合材料。利用X-射线衍射仪、扫描电子显微镜、能谱分析仪、紫外-可见光谱仪对所得材料的相组成、微观形貌、组分和光催化性质进行系统的表征分析。结果表明:成功合成了纳米Au修饰的氧化亚铜基六角形复合材料Cu_2O/Au;Cu_2O/Au相比Cu_2O,光催化性能明显提高,在6h内对甲基橙的光催化降解率从73%提高至95%以上。
The hexagonal Cu2 O is synthesized with copper acetate,ascorbic acid and sodium hydroxide as raw materials at room temperature.Then the hexagonal Cu2 O/Au composite is synthesized by the substitution reaction between AuC13 and Cu2 O with the AuCl_3 as the gold source and the hexagonal Cu_2 O as base material.The phase composition,microscopic morphology,composition and photocatalytic properties of the obtained materials are systematically characterized by X-ray diffraction,scanning electron microscope,energy spectrum analyzer and UV-vis spectrograph.The results show that the hexagonal Cu_2 O/Au is successfully synthesized.Compared with Cu_2 O,the photocatalytic performance of Cu_2 O/Au has improved significantly,the photocatalytic degradation rate of methyl orange increases from 73% to 95% within 6 h.
The hexagonal Cu2 O is synthesized with copper acetate,ascorbic acid and sodium hydroxide as raw materials at room temperature.Then the hexagonal Cu2 O/Au composite is synthesized by the substitution reaction between AuC13 and Cu2 O with the AuCl_3 as the gold source and the hexagonal Cu_2 O as base material.The phase composition,microscopic morphology,composition and photocatalytic properties of the obtained materials are systematically characterized by X-ray diffraction,scanning electron microscope,energy spectrum analyzer and UV-vis spectrograph.The results show that the hexagonal Cu_2 O/Au is successfully synthesized.Compared with Cu_2 O,the photocatalytic performance of Cu_2 O/Au has improved significantly,the photocatalytic degradation rate of methyl orange increases from 73% to 95% within 6 h.
引文
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[3]HAN C H,LI Y,SHEN J.Photocatalytic degradation of dodecylbenzenesulfonate over TiO2-Cu2O under visible irradiation[J].Journal of Hazardous Materials.2009,168(1):215~219.
[4]ZHU J W,BI H P,WANG Y P,et al.Solution-phase synthesis of Cu2O cubes using CuO as a precursor[J].Materials Letters,2008,62(14):2081~2083.
[5]陈善亮,应鹏展,顾修全,等.Cu2O薄膜的制备及其光催化活性[J].化工环保,2011,31(5):469~473.
[6]ANANDAN S,WU J J,BAHNEMANN D.Crumpled Cu2O-gC3N4nanosheets for hydrogen evolution catalysis[J].Colloid Surf A,2017,527(20):34~41.
[7]SIRIPALA W,IVANOVSKAYAA,JARAMILLOFT.A Cu2O/TiO2heterojunction thin film cathode for photo-electrocatalysis[J].Solar Energy Mater Solar Cells,2003,77(3):229~237.
[8]SUN S D,KONG C C,YOU H J,et al.Facet-selective growth of Cu-Cu2O heterogeneous architectures[J].CrystEngComm,2012,14(1):40~43.
[9]ZHU H,DU M L,YU D L,et al.A new strategy for the surfacefree-energy-distributioninduced selective growth and controlled formation ofCu2O-Au hierarchical heterostructures with a series ofmorphological evolutions[J].J.Mater.Chem.A,2013,1:919~923.
[10]ZHU H,DU M L,YU D L,et al.Selective growth of Au nanograins on specic positions(tips,edges and facets)of Cu2O octahedrons to form Cu2O-Au hierarchical heterostructures[J].Dalton Trans.,2012,41:13795~13799.
[11]PAN Y L,DENG S Z,POLAVARAPU L,et al.Plasmon-Enhanced Photocatalytic Properties of Cu2O Nanowire-Au Nanoparticle Assemblies[J].Langmuir,2012,(28):12304~12310.
[12]LIU H R,YANG J H,ZHANG Y Y,et al.Prediction of(TiO2)x(Cu2O)y alloys for ecient photoelectrochemical water splitting[J].Phys.Chem.Chem.Phys.,2013,(15):1778~1781.
[13]LIU X W.Selective Growth of Au Nanoparticles on(111)Facets of Cu2O Microcrystals with an Enhanced Electrocatalytic Property[J].Langmuir,2011,27:9100~9104.
[14]LIU X W,WANG F Y,ZHEN F,et al.In situ growth of Au nanoparticles on the surfaces of Cu2O nanocubes for chemical sensors with enhanced performance[J].RSC Advances,2012,(2):7647~7651.
[15]WANG P,HUANG B B,QIN X Y,et al.Ag@AgCl:A Highly Efficient and Stable Photocatalyst Active under Visible Light[J].Angew.Chem.[J].Int.Ed.,2008,47:7931~7933.
[16]YATMAZ H C,AKYOL A,BAYRAMOGLU M.Kinetics of the Photocatalytic Decolorization of an Azo Reactive Dye in Aqueous ZnO Suspensions[J].Ind.Eng.Chem.Res.,2004,43:6035~6039.
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