采用溶胶-凝胶法制备了ZnFe2O4、TiO2和不同物质的量比的ZnFe2O4/TiO2粉末样品,研究了样品的XRD图、SEM图、UV-vis图、表面光电压谱(SPS)和外场诱导下的光电压图谱(EFISPS).结果表明,该复合物在紫外-可见光区有一定的表面光电压响应,其中n(ZnFe2O4)/n(TiO2)=l∶4时复合物的光电压性能最佳,外场诱导下的光电压强度随着正向偏压的增加而增大,但是与单一的ZnFe2O4光电压性能对比,此复合物的可见光响应范围和光电压响应强度没有明显优势,这就说明ZnFe2O4和TiO2复合之后没有增强其电荷的分离效率,同时也验证了不同材料之间的能级匹配是有选择性的.
参考文献
| [1] | Koelsch M.;Cassaignon S.;Guillemoles JF.;Jolivet JR. .Comparison of optical and electrochemical properties of anatase and brookite TiO2 synthesized by the sol-gel method[J].Thin Solid Films: An International Journal on the Science and Technology of Thin and Thick Films,2002(0):312-319. |
| [2] | Andrzej Sobezynski;Lukasz Duczmal .Photocatalytic destruction of catechol on illuminated titania[J].Reaction kinetics & catalysis letters,2004(2):213-218. |
| [3] | Zlamal M;Macak JM;Schimuki P;Krysa J .Electrochemically assisted photocatalysis on self-organized TiO2 nanotubes[J].Electrochemistry communications,2007(12):2822-2826. |
| [4] | 高濂;郑珊;张青红.纳米氧化钛光催化材料及应用[M].北京:化学工业出版社,2002:12. |
| [5] | Alessandri I;Comini E;Bontempi E;Faglia G;Depero LE;Sberveglieri G .Cr-inserted TiO2 thin films for chemical gas sensors[J].Sensors and Actuators, B. Chemical,2007(1):312-319. |
| [6] | A.I.Kokorin;V.M.Arakelyan;V.M.Arutyunian .Spectroscopic study of polycrystalline TiO_2 doped with vanadium[J].Russian Chemical Bulletin,2003(1):93-97. |
| [7] | Xie Y B;Yuan C W .Visible light induced photocatalysis of ceriumion modified titania sol and manocrystallites[J].Journal of Materials Science and Technology,2004,20(01):14. |
| [8] | 侯桂芹,李中秋,张文丽.纳米铁酸锌制备方法研究进展[J].中国陶瓷工业,2006(01):44-45. |
| [9] | 刘辉,魏雨,张艳峰,贾振斌.纳米铁酸盐的制备研究--低温催化相转化法合成纳米级铁酸锌及表征[J].无机材料学报,2002(01):56-60. |
| [10] | Valenzuela M A;Bosch P;Becerrill J J et al.Preparation,characterization and photocatalytic activity of ZnO,Fe2O3 and ZnFe2O4[J].Journal of Photochemistry and Photobiology A:Chemistry,2002,148(1-3):177. |
| [11] | Pailhe, N;Wattiaux, A;Gaudon, M;Demourgues, A .Impact of structural features on pigment properties of alpha-Fe2O3 haematite[J].Journal of Solid State Chemistry,2008(10):2697-2704. |
| [12] | J. Yang;S. Mei;S. Quaresma .In situ-templated hydrothermal synthesis of Fe-doped anatase nanorods[J].Acta materialia,2005(5):1479-1484. |
| [13] | Jing LQ.;Sun XJ.;Shang J.;Cai WM.;Xu ZL.;Du YG.;Fu HG. .Review of surface photovoltage spectra of nano-sized semiconductor and its applications in heterogeneous photocatalysis[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2003(2):133-151. |
| [14] | Zhang S;Zhu Y F;Brodie D E .Photoconducting TiO2 prepared by spray pyrolysis using TiCl4[J].Thin Solid Films,1992,213(02):265. |
| [15] | Tang H;Prasad K;Sanjings R et al.Electronic structure of anatase TiO2 oxide[J].Journal of Applied Physics,1994,75(06):2945. |
| [16] | Ren YJ.;Zhang ZC.;Fang SB.;Yang MZ.;Cai SM. .Application of PEO based gel network polymer electrolytes in dye-sensitized photoelectrochemical cells[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2002(2):253-259. |
| [17] | Yan Y;Al-Jassim M;Wei S .Oxygen-vacancy mediated adsorption and reactions of molecular oxygen on the ZnO surface[J].Physical Review B:Condensed Matter,2005,72(16):161307. |
| [18] | Peng L;Xie T;Fan Z et al.Surface photovoltage characterization of an oriented α-Fe2O3 nanorod array[J].Chemical Physics Letters,2008,459(1-6):159. |
| [19] | Donchev V;Kirilov K;Germanova K .Surface photovoltage phase spectroscopy-A handy tool for characterisation of bulk semiconductors and nanostructures[J].Materials Science and Engineering B,2006,129(1-3):186. |
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