中文摘要：

通过浸渍过程实现了磷酸对溶胶水热法合成的锐钛矿相TiO2纳米粒子的改性。重点研究了磷酸修饰对纳米锐钛矿相TiO2的热稳定性及光催化活性的影响。结果表明,磷酸修饰显著地提高了纳米锐钛矿相TiO2热稳定性,甚至经过800℃热处理后仍然具有以锐钛矿相为主的相组成。在光催化降解罗丹明B（RhB）过程中经过700℃热处理的磷酸修饰的样品表现出了优于商品P25-TiO2的活性。

英文摘要：

TiO2 nanoparticles synthesized by a sol-hydrothermal process were modified with phosphorous acid by an impregnation method.The effects of phosphorous acid modification on the thermal stability and photocatalytic activity of anatase TiO2 were mainly investigated.The results show that the phosphorous acid modification obviously enhances the thermal stability of nanosized anatase TiO2,a principal anatase phase was maintained even after thermal treatment at 800 ℃.During the processes of photocatalytic degradation RhB,the as-prepared phosphorous acid modified TiO2 by thermal treatment at 700 ℃ exhibits higher activity than P25-TiO2.