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%.
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%.
出处
《中国环境科学》
EI
CAS
CSSCI
CSCD
北大核心
2000年第6期561-564,共4页
China Environmental Science
基金
国家自然科学基金!(29977015)
甘肃省自然科学基金!(ZS981-A24-058-Y)
关键词
光催化氧化
吖啶橙
污染物降解
二氧化钛
doped: Tio2 nanoparticles
photocatalytic oxidation
degradation
acridine orange