| Photogenerated carrier transfer mechanism and photocatalysis properties of TiO2 sensitized by Zn（ Ⅱ ） phthalocyanine |
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| 引用本文： | 李丽,辛柏福.Photogenerated carrier transfer mechanism and photocatalysis properties of TiO2 sensitized by Zn（ Ⅱ ） phthalocyanine[J].中南工业大学学报(英文版),2010,17(2):218-222. |
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| 作者姓名： | 李丽 辛柏福 |
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| 作者单位： | |
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| 基金项目： | Project(20431030) supported by the National Natural Science Foundation of China; Project(2006RFQXS096) supported by the Foundation for Science and Technology Innovation Talents of Harbin, China; Project(1152Z002) supported by the Key Projects of Educational Department of Heilongjiang Province, China; Project(LBH-Q07111) supported by Heilongjiang Postdoctoral Funds for Scientific Research Initiation |
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| 摘 要： | The Zn(Ⅱ) phthalocyanine sensitized TiO2(ZnPc-TiO2) nanoparticles were prepared by hydrothermal method via impregnation with ZnPc.The as-prepared photocatalysts were characterized by X-ray diffractometry(XRD) and diffuse reflectance spectroscopy(DRS),and the surface photovoltage spectroscopy(SPS) and photocatalytic degradation of rhodamine B(RhB) were studied under illuminating.The experimental results indicate that TiO2 sensitized by ZnPc extends its absorption band into the visible region effectively,and ...
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| 关 键 词： | 二氧化钛光催化剂 光生电子 锌（Ⅱ） 传输机制 光催化性能 敏化 酞菁 TiO2 |
| 收稿时间： | 25 November 2008 |
Photogenerated carrier transfer mechanism and photocatalysis properties of TiO2 sensitized by Zn(II) phthalocyanine |
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| Li Li and Bai-fu Xin.Photogenerated carrier transfer mechanism and photocatalysis properties of TiO2 sensitized by Zn(II) phthalocyanine[J].Journal of Central South University of Technology,2010,17(2):218-222. |
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| Authors: | Li Li and Bai-fu Xin |
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| Affiliation: | [1]Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, China [2]School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China |
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| Abstract: | The Zn(Ⅱ) phthalocyanine sensitized TiO_2 (ZnPc-TiO_2) nanoparticles were prepared by hydrothermal method via impregnation with ZnPc. The as-prepared photocatalysts were characterized by X-ray diffractometry (XRD) and diffuse reflectance spectroscopy (DRS), and the surface photovoltage spectroscopy (SPS) and photocatalytic degradation of rhodamine B (RhB) were studied under illuminating. The experimental results indicate thatTiO_2 sensitized by ZnPc extends its absorption band into the visible region effectively, and the sensitized TiO_2 has higher activity than TiO_2 (Degussa P-25) under the simulated solar light and the visible light. Based on the DRS and SPS results, the mechanism about the photogenerated carrier transfer between TiO_2 and ZnPc is proposed. At a lower ZnPc content (≦0.20 μmol/g), ZnPc monomer acts as the electron donor, which provides the photoinduced electrons to the conduction band of TiO_2. These photoinduced electrons can transfer to molecular oxygen (O_2), leading to the formation of active species, such as superoxide/hydroxide radicals and singlet oxygen, which is beneficial to the photocatalytic reaction. While at a higher ZnPc content (>0.20 μmol/g), the formation of ZnPc dimer results in the decrease of photocatalytic activities of ZnPc-TiO_2 photocatalyst. |
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| Keywords: | TiO_2 nanoparticles photocatalyst sensitization photodegradation mechanism |
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