| 微量铂掺杂对TiO2粉末结构和性能的影响 |
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| 引用本文： | 刘秀华,吴仲成,赵雅文,杨宇川,傅依备.微量铂掺杂对TiO2粉末结构和性能的影响[J].化学学报,2009,67(6):507-512. |
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| 作者姓名： | 刘秀华 吴仲成 赵雅文 杨宇川 傅依备 |
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| 作者单位： | (中国工程物理研究院 绵阳 621900) |
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| 基金项目： | 中国工程物理研究院环保基金 |
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| 摘 要： | 采用溶胶-凝胶法制备了铂掺杂的TiO2粉末, 利用透射电子显微镜、X射线光电子能谱、紫外可见光谱和X射线衍射技术对粉末的结构和光吸收性能进行了表征. 结果表明, Pt/TiO2粉末主要含有Ti, O, Pt和C元素, 其中Pt主要以0价态存在. 573～873 K焙烧的Pt/TiO2粉末中, TiO2是锐钛矿结构, 973 K焙烧时, 有6.3%的TiO2转变为金红石结构. Pt/TiO2粉末的晶粒尺寸小, 铂和锐钛矿结构TiO2粒子都是纳米颗粒. 随焙烧温度升高, 粉末中TiO2的晶粒尺寸逐渐增大, 晶格常数a和c发生各向异性的变化, 单胞体积在相变时发生收缩. 与TiO2粉末相比, Pt/TiO2粉末中两种结构TiO2的晶格常数和晶胞体积基本上都增大了, 光谱吸收范围被明显拓展至可见光, 实现了可见光催化的基础.
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| 关 键 词： | 铂 二氧化钛 粉末 表征 |
| 收稿时间： | 2008-3-4 |
| 修稿时间： | 2008-7-30 |
The Effects of Doping Micro Platinum on the Structures and Performances of TiO2 Powders |
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| Liu,Xiuhua,Wu,Zhongcheng,Zhao,Yawen,Yang,Yuchuan,Fu,Yibei.The Effects of Doping Micro Platinum on the Structures and Performances of TiO2 Powders[J].Acta Chimica Sinica,2009,67(6):507-512. |
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| Authors: | Liu Xiuhua Wu Zhongcheng Zhao Yawen Yang Yuchuan Fu Yibei |
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| Institution: | (China Academy of Engineering Physics, Mianyang 621900) |
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| Abstract: | The Pt-doped TiO2 powder was prepared by the sol-gel method,and its structure and light ab-sorption performance were characterized by transmission electron microscopy,X-ray photoelectron spec-troscopy,UV-Vis absorption spectroscopy and X-ray diffraction.The results showed that there were Ti,O,Pt and C elements in the Pt/TiO2 powder,and Pt mainly existed in a metallic state.When calcined between 573 and 873 K,TiO2 in Pt/TiO2 powder took an anatase structure.When calcined at 973 K,6.3% TiO2 was transformed in... |
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| Keywords: | platinum titanium dioxide powder characterization |
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