| 声化学辅助溶剂热合成高光催化性能的BiOCl光催化剂 |
| Sonochemistry Assisted Solvothermal Preparation of BiOCl Photocatalyst with High Photocatalytic Performance |
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| 摘要: 以五水硝酸铋和氯化钠为原料,乙二醇(EG)和水作溶剂,通过声化学辅助溶剂热法合成了系列BiOCl纳米晶光催化剂。应用氮气物理吸附、X射线粉末衍射(XRD)、扫描电镜(SEM)、傅里叶变换红外光谱(FTIR)、紫外-可见(UV-Vis)漫反射(DRS)和光电流等测试手段对所制备的光催化剂进行了表征。在汞灯和氙灯照射下,以苯酚和甲基橙为水体模型污染物,系统考察了超声辐射时间和醇水比(VEG/VH2O)对BiOCl光催化剂性能的影响。结果表明,当超声辐射时间为60 min,VEG/VH2O=1/4时,合成的BiOCl表现出最佳的光催化活性,为常规沉淀法制备的BiOCl的3.3倍。活性提高的主要原因是,适当时间的超声波辐射和醇水比有利于催化剂比表面积的提高,同时可以丰富催化剂表面羟基(-OH)的数量和提高光生电子和空穴的分离效率。 |
| 关键词: 超声辐射 醇水比 BiOCl 溶剂热 污染物 光催化 |
| 基金项目: 国家自然科学基金资助项目(No.21567008,21263005)、江西省自然科学基金青年科学基金计划(No.20133BAB21003)、江西省教育厅高等学校科技落地计划项目(No.KJLD14046);江西省青年科学家培养项目(No.20122BCB23015)、2015年江西省研究生创新专项资金项目(No. YC2015-S293)和2015江西理工大学研究生创新资金项目(No.XS201540)资助。 |
| Abstract: Using Bi(NO3)3·5H2O and NaCl as precursors, ethylene glycol and water as solvent, BiOCl photocatalysts were synthesized by sonochemistry assisted hydrothermal or solvothermal method.The as-synthesized products were characterized by N2 physical adsorption, X-ray diffraction, scanning electron microscopy, Fourier translation infrared spectroscopy(FTIR), UV-Vis diffuse reflectance spectroscopy(DRS) and photoelectrochemical measurements.With phenol and methyl orange as the model degradation pollutants and mercury lamp and xenon lamp as light source, the effects of ultrason irradiation time and the VEG/VH2O on photocatalyst performance of the BiOCl were studied.Results indicated that BiOCl synthesized under ultrason irradiation time for 60 min and with VEG/VH2O of 1/4 showed the excellent photocatalytic activity.With respect to BiOCl synthesized by traditional precipitation, 3.3 times increase over the ultrason fabricated BiOCl were obtained.The main reasons for the enhanced activity could be that the ultrason irradiation with appropriate time and suitable VEG/VH2O might benefit the increase in surface area and surface-OH groups, and the decrease in crystal size.Moreover, a high separation efficiency of photogenerated electrons(e-) and hole(h+) was observed over the ultrason fabricated BiOCl. |
| Keywords: ultrason irradiation ratio of ethylene glycol and water BiOCl solvothermal pollutants photocatalysis |
| 投稿时间：2015-12-02 修订日期：2016-03-03 |
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| 何洪波,薛霜霜,余长林,樊启哲.声化学辅助溶剂热合成高光催化性能的BiOCl光催化剂[J].无机化学学报,2016,32(4):625-632. |
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