Tuning of NaTaO_3 Band Structure through Mn~(2+) Ion Doping and the Enhanced Visible Light Response |
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引用本文: | 李国霞,杨旭,海力斯,柴占丽,王晓晶.Tuning of NaTaO_3 Band Structure through Mn~(2+) Ion Doping and the Enhanced Visible Light Response[J].结构化学,2014,33(5):771-778. |
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作者姓名: | 李国霞 杨旭 海力斯 柴占丽 王晓晶 |
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作者单位: | School of Chemistry and Chemical Engineering,Inner Mongolia University |
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基金项目: | Supported by the National Natural Science Foundation of China(Nos.21103081 and 21267014); the Project of Scientific and Technological Innovation Team of Inner Mongolia University(12110614) |
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摘 要: | Pure and Mn-doped NaTaO3 nanoparticles were synthesized by a simple hydro- thermal method. XRD and XPS results suggested that manganese ions were successfully doped into the NaTaO3 crystalline in Mn2+ state. UV-vis diffuse reflectance spectra revealed the obvious red-shift in the series of manganese doped NaTaO3 nanoparticles, resulting in a decrease in the band gap of NaTaO3 with the increase of Mn2+ doping concentration. The photo-degradation experiment indicated that manganese doped NaTaO3 showed good photocatalytic performance and methylene blue(MB) degradation is improved with lower doping concentration of manganese ions under visible light. The simulation of energy band structure by density functional theory unfolded that the substitution of Ta5+ ions by Mn2+ ions resulted in an intermediate band(IB) below the bottom of the conduction band(CB), which was mainly attributed to the state of Mn 3d.
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关 键 词: | 离子掺杂 Mn掺杂 能带结构 掺杂浓度 XPS分析 锰离子 漫反射光谱 光催化性能 |
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