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| ZnO/BiVO4-V2O5异质结构光生电荷性质及可见光下表面光电流行为 | |
| 引用本文： | 张宇,林申,张钰,宋溪明. ZnO/BiVO4-V2O5异质结构光生电荷性质及可见光下表面光电流行为[J]. 物理化学学报, 2013, 29(11): 2399-2404. DOI: 10.3866/PKU.WHXB201309061 |
| 作者姓名： | 张宇 林申 张钰 宋溪明 |
| 作者单位： | Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, P. R. China |
| 基金项目： | 国家自然科学基金(21203082,51273087,21071070);辽宁省教育厅自然科学基金(LT2011001);辽宁省科技厅自然科学基金(201102084)和辽宁大学青年基金(2011LDQN02)资助项目 |
| 摘 要： | 利用水热法合成了花状和球状ZnO微纳材料,并与硝酸铋和偏钒酸铵溶液体系反应构筑了ZnO/BiVO4-V2O5复合体系.利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)及X射线衍射(XRD)对材料进行了系统的表征.利用表面光伏(SPV)、表面光电流(SPC)和瞬态光伏(TPV)技术研究了ZnO/BiVO4-V2O5表面光生电荷的产生和传输机制.结果显示该复合材料在可见区产生了良好的光电响应,获得了较高的光生载流子的分离效率,光生电荷的寿命也同时增加.在单色弱可见光(波长500 nm)照射下,复合材料产生良好重复性的表面光电流响应. |
| 关 键 词： | 异质结构 表面光电流 表面光伏 瞬态光伏 光生电荷 |
| 收稿时间： | 2013-05-27 |
| 修稿时间： | 2013-09-06 |
Properties of Photogenerated Charge Carriers and Visible-Light Surface Photocurrent of Heterogeneous ZnO/BiVO4-V2O5 Structures |
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| ZHANG Yu,LIN Shen,ZHANG Yu,SONG Xi-Ming. Properties of Photogenerated Charge Carriers and Visible-Light Surface Photocurrent of Heterogeneous ZnO/BiVO4-V2O5 Structures[J]. Acta Physico-Chimica Sinica, 2013, 29(11): 2399-2404. DOI: 10.3866/PKU.WHXB201309061 | |
| Authors: | ZHANG Yu LIN Shen ZHANG Yu SONG Xi-Ming |
| Affiliation: | Liaoning Key Laboratory for Green Synthesis and Preparative Chemistry of Advanced Materials, College of Chemistry, Liaoning University, Shenyang 110036, P. R. China |
| Abstract: | Spherical and flower-like ZnO micro/nanomaterials are synthesized through a hydrothermal method. ZnO/BiVO4-V2O5 composite structures are then prepared in a solution containing Bi(NO3)3 and NH4VO3.The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopic (TEM), and X-ray diffraction (XRD). Surface photovoltage (SPV), surface photocurrent (SPC), and transient photovoltage (TPV) techniques were used to investigate the generation and transport mechanisms of the photogenerated charge carriers in the heterogeneous ZnO/BiVO4-V2O5 structure. The composite materials show good photoelectric response to visible light. Highly efficient separation of photogenerated charge carriers is observed, and the so-formed charge carriers are long lived. Measurements of surface photocurrent by comb-like electrode were performed on the ZnO/BiVO4-V2O5 system. Under irradiation by weak monochromatic light (wavelength: 500 nm), the ZnO/BiVO4-V2O5composite materials generate surface photocurrent responses with good reproducibility. |
| Keywords: | Heterogeneous structure Surface photocurrent Surface photovoltage Transient photovoltage Photogenerated charge |
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