采用溶胶-凝胶法制备含有不同掺杂离子的TiO2溶胶和纳米粉,采用浸渍提拉法将溶胶涂敷在自制的多孔陶瓷膜件上,考察其对蚁酸溶液(1%)的光降解作用.研究结果表明,在适宜掺杂浓度(1%Fe3+,0.5%La3+(摩尔浓度))下,Fe3+/La3+-TiO2膜的光催化性能最好.采用X射线衍射仪分析、原子力电子显微镜和吸收光谱仪等研究单独掺杂Fe3+、La3+和复合掺杂Fe3+/La3+离子的作用及膜的性能,从而确定出提高TiO2光催化活性的最佳掺杂工艺.
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