【摘要】 利用酸催化溶胶－凝胶法（ｓｏｌ－ｇｅｌ）制备了 Ｆｅ３＋和 Ｃｒ３＋不同掺入量的 ＴｉＯ２半导体纳米粒子研究了这些纳米粒子对吖啶橙光催化氧化降解的影响．结果表明，微量 Ｆｅ３＋和 Ｃｒ３＋的掺入可明显提高 ＴｉＯ２的光催化活性．进一步研究表明，在 Ｆｅ３＋－ＴｉＯ２体系中，最佳掺入量为 ０．１％，而且中性介质和自然光有利于光催化氧化反应的进行，反应３ｈ后降解率可达９７．７５％．在Ｃｒ３＋－ＴｉＯ２体系中，弱碱性介质和自然光有利于光催化氧化反应，最佳掺入量为０．０５％，降解率可达８７．５４％．更多还原

【Abstract】 Fe3+ and Cr3+)-doped TiO2 nanoparticles with different doping amount were prepared through the acidcatalyzed sol-gel method. The influence of these nanoparticles on the photocatalytic oxidative degradation of acridine orange (AO) was investigated. The results indicated the micro-amount of (Fe3+ or Ce3+)-doping could markedly improve the photocatalytic activity of TiO2. Moreover, in the Fe3+-TiO2 system, 0. 1 % was the optimal amount of doping; neutral condition and natural sunlight (NSL) were favorable for photocatalytic oxidation. After three hours reaction, the degradation rate of AO could reach 97.75%. In the Cr3+- TiO2 system, 0.05% was optimal amount of doping; alkalescent condition and NSL were favorable for photocatalytic oxidation, the degradation rate of AO could reach 87.54%.更多还原