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Electrochemical deposition of nano-structured ZnO on the nanocrystalline TiO_2 film and its characterization

查看全文 作　　者：LIN JingSheng,FU Wei,JING LiQiang,QU YiChun & LI ZhiJun Key Laboratory of Functional Inorganic Material Chemistry (Ministry of Education);School of Chemistry and Material Science,Heilongjiang University,Harbin 150080,China 高影响力作者 出　　处：《Science China Chemistry》索引2010年第53卷第8期,共5页高影响力期刊 基　　金：supported by the program for New Century Excellent Talents in Universities (NCET-07-259);the Key Project of Science & Technology Research of the Ministry of Education of China (207027);the Science Foundation of Excellent Youth of Heilongjiang Province of China (JC200701) 摘　　要：One-dimensional structure of ZnO nanorod arrays on nanocrystalline TiO2/ITO conductive glass substrates has been fabricated by cathodic reduction electrochemical deposition methods in the three-electrode system,with zinc nitrate aqueous solution as the electrolyte,and were characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),energy-dispersive X-ray (EDX) and photoluminescence (PL) spectra.The effects of film substrates,electrolyte concentration,deposition time,and methenamine (HMT) addition on ZnO deposition and its luminescent property were investigated in detail.The results show that,compared with on the ITO glass substrate,ZnO is much easily achieved by electrochemical deposition on the TiO2 nanoparticle thin films.ZnO is hexagonally structured wurtzite with the c-axis preferred growth,and further forms nanorod arrays vertically on the substrates.It is favorable to the growth of ZnO to extend the deposition time,to increase the electrolyte concentration,and to add a certain amount of HMT in the system,consequently improving the crystallinity and orientation of ZnO arrays.It is demonstrated that the obtained ZnO arrays with high crystallinity and good orientation display strong band-edge UV (375 nm) and weak surface-state-related green (520 nm) emission peaks. 关 键 词：zinc oxide nanorod array electrochemical DEPOSITION NANOCRYSTALLINE TITANIUM dioxide FILM PHOTOLUMINESCENCE
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