利用层层自组装技术将磷钨酸(PW12)和二氧化钛(TiO2)纳米溶胶负载在滤纸模板上制备了复合材料,所得复合材料在400℃烧结4h去除模板得到TiO2/PW12复合材料,并对其进行了红外光谱和X射线粉末衍射的表征.以TiO2/PW12为催化剂研究了其紫外灯下对甲基橙的催化性能.主要考察了催化剂的质量、层数、甲基橙溶液pH值和无机离子对甲基橙染料降解率的影响.结果表明:甲基橙降解率在一定范围内随催化剂质量的增加而升高,催化剂质量的最佳值是0.10g,在此之后,随着催化剂用量的增加,降解率成下降的趋势;该催化剂在pH--2的条件下催化效果最好;随着层数的增加催化效率增加,当催化剂为10层时降解率最高;无机盐的加入均对甲基橙的降解表现出抑制作用.
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