| Preparation of Zn/TiO2 powder and its photocatalytic performance for oxidation of P-nitrophenol |
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| 作者姓名： | LIU Xiuhua XU Yunshu ZHONG Zhijing FU Yibei DENG Yi |
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| 作者单位： | Institute of Nuclear Physics and Chemistry, Mianyang 621900, China |
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| 摘 要： | Zn-doped TiO2 catalysts were prepared using a sol-gel method and characterized by XPS,UV-Vis, BET, XRD in this study. Under the irradiation of simulant sunlight, the photocatalytic activity for the degradation of p-nitrophenol was studied too. After irradiation for 2.5 h, the degradation percentage of p-nitrophenol could rise to more than 80 %. The results showed that the spectrum absorption band edge of Zn/TiO2 powder does not broaden obviously comparing with pure TiO2 powder. Zinc exists as Zn （11）. When calcined at 973 K, there is a new phase as ZnTiO3 in Zn/TiO2 catalyst. The order of photocatalytic activity of Zn/TiO2 catalysts calcined at different temperatures for p-nitrophenol is 773 K 〉 673 K 〉 873 K 〉 573 K 〉 973 K and the photocatalytic activity of Zn/TiO2 catalyst calcined at 773 K is better than TiO2 catalysts heated at the same temperature, and outclasses that of commercial TiO2 catalyst. It also showed that the photocatalytic degradation of p-nitrophenol follows first-order kinetics under the irradiation of simulant sunlight.
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| 关 键 词： | 二氧化钛 锌 金属粉末 光催化性能 对硝基酚 氧化 |
Preparation of Zn/TiO2 powder and its photocatalytic performance for oxidation of P-nitrophenol |
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| LIU Xiuhua XU Yunshu ZHONG Zhijing FU Yibei DENG Yi.Preparation of Zn/TiO2 powder and its photocatalytic performance for oxidation of P-nitrophenol[J].Nuclear Science and Techniques,2007,18(1):59-64. |
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| Authors: | LIU Xiuhua XU Yunshu ZHONG Zhijing FU Yibei DENG Yi |
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| Affiliation: | 1. School of Physics, Universiti Sains Malaysia, 11800 USM Penang, Malaysia;2. Institute of Nano-Optoelectronics Research and Technology Laboratory (INOR), Universiti Sains Malaysia, 11800 USM Penang, Malaysia;1. University of Geographic and Environment, Shandong Normal University, Jinan, Shandong, China;2. State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;3. University of Chinese Academy of Sciences, Beijing 100049, China;1. Laboratoire de Chimie et Environnement, Université de Tiaret, BP 78 Zaaroura, Tiaret 14000, Algeria;2. Laboratoire de Génie chimique, B6a, Université de Liège, B-4000 Liège, Belgium;1. School of Energy and Power, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, PR China;2. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, PR China;3. School of Material Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang, Jiangsu 212003, PR China;4. College of Chemistry, Zhengzhou University, Zhengzhou 450001, PR China |
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| Abstract: | Zn-doped TiO2 catalysts were prepared using a sol-gel method and characterized by XPS,UV-Vis, BET,XRD in this study. Under the irradiation of simulant sunlight, the photocatalytic activity for the degradation of p-nitrophenol was studied too. After irradiation for 2.5 h, the degradation percentage of p-nitrophenol could rise to more than 80 %. The results showed that the spectrum absorption band edge of Zn/TiO2 powder does not broaden obviously comparing with pure TiO2 powder. Zinc exists as Zn (Ⅱ). When calcined at 973 K, there is a new phase as ZnTiO3 in Zn/TiO2 catalyst. The order of photocatalytic activity of Zn/TiO2 catalysts calcined at different temperatures for p-nitrophenol is 773 K ＞ 673 K ＞ 873 K ＞ 573 K ＞ 973 K and the photocatalytic activity of Zn/TiO2 catalyst calcined at 773 K is better than TiO2 catalysts heated at the same temperature, and outclasses that of commercial TiO2catalyst. It also showed that the photocatalytie degradation of p-nitrophenol follows first-order kinetics under the irradiation of simulant sunlight. |
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| Keywords: | Titanium dioxide Zinc Powder Characterization Photocatalysis Preparation oxidation performance photocatalytic activity kinetics commercial better temperatures different order catalyst phase Zinc comparing pure powder results spectrum absorption band edge |
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