Photocatalytic performances and activities in Ag-doped ZnAl2O4 nanorods studied by FTIR spectroscopy
Photocatalytic performances and activities in Ag-doped ZnAl2O4 nanorods studied by FTIR spectroscopy
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DOI：
10.1039/c2cy20377d
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发表时间：
2013-02
影响因子：
5
通讯作者：
Zhengru Zhu;Qidong Zhao;Xinyong Li;H. Li;M. Tadé;Shaomin Liu
中科院分区：
文献类型：
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作者：
Zhengru Zhu;Qidong Zhao;Xinyong Li;H. Li;M. Tadé;Shaomin Liu
采用简单的水热法成功合成了多孔棒状ZnAl 2 O 4纳米结构。以多孔ZnAl 2 O 4为载体，采用等体积浸渍法制备了Ag掺杂的ZnAl 2 O 4催化剂，该催化剂具有良好的光电性能和催化活性。采用X射线粉末衍射（XRD）、BET、透射电子显微镜（TEM）、电子自旋共振（ESR）、X射线光电子能谱（XPS）和傅里叶变换红外光谱（FT-IR）等技术对样品的结构进行了系统的研究。在紫外灯照射下，比较研究了Ag掺杂的ZnAl 2 O 4、ZnAl 2 O 4和P25 TiO 2样品对甲苯的光催化降解性能。结果表明，在pH = 6的条件下合成的掺银ZnAl 2 O 4样品对甲苯具有较好的降解能力。Ag掺杂ZnAl 2 O 4纳米棒在6 h的长时间运行过程中没有明显的失活现象。Ag掺杂的ZnAl 2 O 4纳米棒在环境净化方面具有潜在的应用前景。
Porous and rod-shaped nanostructures of ZnAl2O4 were successfully synthesized by a simple hydrothermal method. The Ag-doped ZnAl2O4 catalyst, based on porous ZnAl2O4, was prepared by the incipient wetness impregnation strategy and showed an excellent photoelectric property and catalytic activity. The structural properties of the samples were systematically investigated by X-ray powder diffraction (XRD), Brunauer–Emmet–Teller (BET), transmission electron microscopy (TEM), Electron spin resonance (ESR), X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FT-IR) techniques. The photocatalytic degradation of toluene by the Ag-doped ZnAl2O4, ZnAl2O4 and P25 TiO2 samples was comparatively studied under UV lamp irradiation. The results indicate that the Ag-doped ZnAl2O4 sample synthesized at pH = 6 exhibited a higher capacity for the degradation of toluene. No obvious deactivation of the Ag-doped ZnAl2O4 nanorods was observed during the prolonged operation of 6 h. The Ag-doped ZnAl2O4 nanorods could be potentially applied in environmental purification in the near future.