摘要：采用微乳法和溶胶-凝胶法相结合的方法制备纳米二氧化钛,通过改变制备参数可以将纳米二氧化钛的晶粒尺寸控制在6~30 nm之间。采用X射线衍射、透射电镜等表征手段,对不同的制备条件与晶粒尺寸的关系进行研究。通过在可见光下对亚甲基蓝水溶液的降解测试其光催化活性。结果表明:补充结论纳米二氧化钛具有良好的光催化性能。

关键词： 微乳法;溶胶-凝胶法;晶粒尺寸;光催化降解

Abstract：TiO₂ nano-particles was prepared by the combined method of micro-emulsion and sol-gel. The crystalline size of TiO₂ nano-particles was controlled between 6 nm to 30 nm by the adjustment of different process parameters. The relationship between the different process parameters and crystalline size was studied by means of X ray diffractometer （XRD）， transmission electron microscope （TEM）. The photocatalytic properties were examined by decomposition of methylene blue aqueous solution under visible light. The results showed that TiO₂ had good photocatalytic property. 

Keywords： micro-emulsion； sol-gel； crystalline size； photocatalytic decomposition