具有三维异质结构的CdSe/TiO_2纳米管阵列薄膜制备及性能测试
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摘要
首先采用阳极氧化法制备TiO_2纳米管阵列,结合不同的电化学方法制备具有三维异质结构的CdSe/TiO_2纳米管阵列复合薄膜。结果表明:电解液中加入酒石酸钾钠,采用循环伏安法和恒压沉积法都得到了分散性好,尺寸小而均匀分布的CdSe纳米颗粒。特别是采用循环伏安法制备CdSe/TiO_2纳米管阵列薄膜时,得到直径为15～20nm的立方相CdSe颗粒,且均匀地分布在TiO_2纳米管管内和管口,能够充分地利用TiO_2纳米管阵列的三维结构,形成具有三维异质结构的CdSe/TiO_2纳米管阵列复合薄膜。光电性能结果表明测试,这种具有三维异质结构的CdSe/TiO_2纳米管阵列复合薄膜能够充分利用太阳光,并有效地促进光生载流子的分离和传输,呈现出最佳的光电化学性能。
Titanium dioxide(TiO_2)nanotube arrays were prepared by anodic oxidation,CdSe/TiO_2 nanotube arrays composite films with three-dimensional heterogeneous structures were prepared by different electrochemical methods.The results show when sodium potassium tartartrate was added into the electrolyte,CdSe nanoparticles with good dispersion,small size and uniform distribution are obtained both by cyclic voltammetry and potentiostatic deposition.Especially,the cubic phase CdSe particles with a diameter of 15 to 20 nm are obtained by using cyclic voltammetry,which are distributed uniformly on the inner and pipe mouth of TiO_2 nanotubes,so as to make full use of the three-dimensional structure of TiO_2 nanotube arrays,and obtain CdSe/TiO_2 nanotube arrays composite films with three-dimnsional heterogeneous structures.Through photoelectric chemical testing,the results show that CdSe/TiO_2 nanotube arrays composite films with three-dimensional heterogeneous structures can make full use of solar energy,effectively promote the separation and transmission of photon-generated carriers,and present the best photochemical properties.
Titanium dioxide(TiO_2)nanotube arrays were prepared by anodic oxidation,CdSe/TiO_2 nanotube arrays composite films with three-dimensional heterogeneous structures were prepared by different electrochemical methods.The results show when sodium potassium tartartrate was added into the electrolyte,CdSe nanoparticles with good dispersion,small size and uniform distribution are obtained both by cyclic voltammetry and potentiostatic deposition.Especially,the cubic phase CdSe particles with a diameter of 15 to 20 nm are obtained by using cyclic voltammetry,which are distributed uniformly on the inner and pipe mouth of TiO_2 nanotubes,so as to make full use of the three-dimensional structure of TiO_2 nanotube arrays,and obtain CdSe/TiO_2 nanotube arrays composite films with three-dimnsional heterogeneous structures.Through photoelectric chemical testing,the results show that CdSe/TiO_2 nanotube arrays composite films with three-dimensional heterogeneous structures can make full use of solar energy,effectively promote the separation and transmission of photon-generated carriers,and present the best photochemical properties.
引文
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[2]FITRA M,DAUT I,IRWANTO M,et al.Effect of TiO2thickness dye solar cell on charge generation[J].Energy Procedia,2013,36:278-286.
[3]ADAWIYA J,HAIDER,RIYAD H,et al.Exploring potential environmental applications of TiO2nanoparticles[J].Energy Procedia,2017,119:332-345.
[4]LINSEBIGLER A L,LU G Q,YATES J T.Photocatalysis on TiO2surfaces:principles,mechanisms,and selected results[J].Chemistry Rev,1995,95(3):735-758.
[5]MICHA T.Scaling properties in photocatalysis[J].Catalysis Today,2000,58(2/3):115-123.
[6]AZHAR A H,ANDREA E S,BILGE S.Effect of Pt/TiO2interface on room temperature hydrogen sensing performance of memristor type Pt/TiO2/Pt structure[J].Sensors and Actuators B:Chemical,2017,253:1043-1054.
[7]VIPUL S,SUNEEL K,VENKATA K.Shape selective Au-TiO2nanocomposites for photocatalytic applications[J].Materials Today:Proceedings,2016,3(6):1939-1948.
[8]ZHANG X W,ZHOU M H,et al.Co-deposition of photocatalytic Fe doped TiO2coatings by MOCVD[J].Catalysis Communications,2006,7:427-431.
[9]ZHOU P P,LE Z G,XIE Y,et al.Studies on facile synthesis and properties of mesoporous CdS/TiO2composite for photocatalysis applications[J].Journal of Alloys and Compounds,2017,692:170-177.
[10]PAWN K D,RAJESH K,RADHEY S T,et al.Surface modification of aligned TiO2nanotubes by Cu2O nanoparticles and their enhanced photo electrochemical properties and hydrogen generation application[J].International Journal of Hydrogen Energy,2018,43(14):6867-6878.
[11]MOHAMED H.ELBAKKAY,WALEED M A,et al.S-TiO2/S-reduced graphene oxide for enhanced photoelectrochemical water splitting[J].Applied Surface Science,2018,439:1088-1102.
[12]RAZAVI F S,MEHDI S N,MOHSEN B.Sol-gel synthesis,characterization and electrochemical corrosion behavior of S-N-C-doped TiO2nano coating on copper[J].Journal of Molecular Liquids,2018,266:99-105.
[13]PAWAR S M,MOHOLKAR A V,BHOSALE C H.Influence of pH on electrochemically deposited CdSe thin films[J].Materials Letters,2007,61(4/5):1034-1038.
[14]HANKARE P P,DELEKAR S D,ASABE M R,et al.Synthesis of cadmium selenide thin films at low-temperature by simple chemical route and their characterization[J].Journal of Physics and Chemistry of Solids,2006,67(12):2506-2511.
[15]PATHAN H M,SANKAPAL B R,DESAI J D,et al.Preparation and characterization of nanocrystalline CdSe thin films deposited by SILAR method[J].Materials Chemistry and Physics,2003,78(1):11-14.
[16]MICHAEL G.Heterogeneous photochemical electron transfer[M].Florida:CRC Press,1981:187.
[17]XUE J B,SHEN Q Q,Yang F,et al.Investigation on the influence of pH on structure and photoelectrochemical properties of CdSe electrolytically deposited into TiO2nanotube arrays[J].Journal of Alloys and Compounds,2014,607:163-168.
[18]XUE J B,SHAO M Z,SHEN Q Q,et al.Electrodeposition of Cu2O nanocrystalline on TiO2nanosheet arrays by chronopotentiometry for improvement of photoelectrochemical properties[J].Ceramics International,2018,44(10):11039-11047.