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| | The surface energy band structure of (Ce, Ag)/TiO 2 nanometer photocatalystic materials for purifying environment was studied by scanning tunneling microscopy and tunneling spectroscopy (STM/STS). The results show that the position of conduct band of (Ce,Ag)/TiO 2 can not be changed, but it can be changed for the valence band. The band-gap decreases from 2.9 eV to 2.4 eV and in the meantime, new energy levels, E cb = -1.0 eV, E vb = 0.9 eV, E g=1.9 eV, are appeared. Photocatalys... | | 用扫描隧道显微镜 /扫描隧道谱 (STM /STS)技术 ,研究 (Ce ,Ag) /TiO2 纳米光催化材料的表面能带结构 .结果表明 :在纳米TiO2 中加入稀土元素和银制备的 (Ce ,Ag) /TiO2 光催化纳米材料TiO2 的表面禁带宽度可由 2 .9eV降到 2 .4eV ,而且增加了新能级Ecb=-1.0eV ,Evb=0 .9eV ,Eg=1.9eV ,能够实现在可见光条件下的光催化 | | 文摘来源 | |   |
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