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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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不同结构钽酸钠的制备及其光解水析氢性能
DOI: 10.1016/S1872-2067(10)60286-0, PP. 1822-1830
Keywords: 光催化,光解水,钽酸钠,异质结,水热合成法
Abstract:
？采用不同钠源,在水热条件下实现了钙钛矿结构NaTaO3、烧绿石结构Na2Ta2O6以及NaTaO3/Na2Ta2O6异质结型复合光催化剂的可控合成,利用X射线衍射、扫描电镜、高分辨透射电镜、紫外-可见漫反射光谱、荧光光谱和X射线光电子能谱对样品进行了表征,探讨了钠源对所得钽酸钠样品结构的影响.光解水析氢实验结果表明,各钽酸盐的光催化活性顺序为NaTaO3/Na2Ta2O6？>NaTaO3>Na2Ta2O6.NaTaO3与Na2Ta2O6？间形成的纳米尺度异质结有效抑制了光生电子和空穴的复合,这是其具有最高光解水析氢活性的主要原因.
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