以细菌纤维素(BC)为载体,用溶胶一凝胶法原位生成稀土镧和铈元素(La,Ce)掺杂的二氧化钛复合膜,以甲基橙为目标降解物,考察了复合膜的光催化活性.结果表明:稀土元素已引入TiO2/BC复合膜中;掺杂TiO2的晶型为锐钛矿型;掺杂稀土的TiO2/BC复合膜的光催化活性比未掺杂的有较大提高;钵掺杂的TiO2/BC复合膜的光催化性能优于铡掺杂的;Ce(4+)掺杂的最适浓度为2 mmol/L,而La(3+)掺杂的最适浓度为5 mmol/L;稀土掺杂的TiO2/BC复合膜对甲基橙溶液重复降解5次的降解率仍高于70%.
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