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以氯化铟(InCl_3)和钒酸铵(NH_4VO_3)为原料,通过回流法制备出了钒酸铟(InVO_4)溶胶。用X射线衍射仪、透射电镜、分光光度计等手段对样品物相、微观形貌、光催化性能进行表征。结合实验结果分析了InVO_4的生成机理,优化了工艺参数。实验证明:回流法中用氢氧化钾(KOH)作矿化剂、回流温度为100℃,时间为20h时,可得到性能较好的InVO_4前驱体溶胶。最后,将制得的InVO_4溶胶与实验室自制的回流二氧化钛(TiO_2)溶胶混合获得复合溶胶。用溶胶-浸渍法在玻璃基片上制备复合薄膜,在一定温度下热处理,制得InVO_4-TiO_2复合光催化薄膜。通过测试,样品在可见光下12h对甲基橙的分解率最高可达73.1%。
Indium vanadate (InVO 4) sol was prepared by reflux method using indium chloride (InCl_3) and ammonium vanadate (NH_4VO_3) as raw materials. The phase, microstructure and photocatalytic performance of the samples were characterized by X-ray diffraction, transmission electron microscopy and spectrophotometer. Based on the experimental results, the formation mechanism of InVO_4 is analyzed and the process parameters are optimized. Experiments show that: the reflux method using potassium hydroxide (KOH) as a mineralizer, the reflux temperature is 100 ℃, the time is 20h, get better InVO_4 precursor sol. Finally, the obtained InVO 4 sol was mixed with a laboratory-made reflow titanium dioxide (TiO 2) sol to obtain a composite sol. The composite film was prepared on the glass substrate by sol-dipping method and heat-treated at a certain temperature to obtain the InVO 4 -TiO 2 composite photocatalytic film. Passing the test, the decomposition rate of methyl orange in the sample under visible light is up to 73.1% at 12h.