摘要
利用酸催化的溶胶-凝胶法制备了纯TiO2和低量Pr3+掺杂的TiO2复合粉体,为了验证其光催化活性,以甲基橙的光催化活性降解为探针反应,评价了其光催化活性,探讨了低量Pr3+掺杂对TiO2粒子光催化活性的影响机制。研究结果表明:(1)在500℃下灼烧粉体可获最佳催化活性;(2)Pr3+掺杂TiO2可以显著提高TiO2粉体的催化活性,当Pr3+与TiO2质量比为0.150%粉体的活性最好;(3)酸性或者碱性条件下,粉体活性得到提高;(4)催化剂最佳用量为2.50 g/L。
Pure TiO2 and Pr^3 ＋ - doped TiO2 composite particles were prepared by an acid - catalyzed sol - gel method. The photocatalytic degradation of methyl orange in aqueous solution was used as a probe reaction to evaluate their photocatalytic activity. The mechanisms of effects of low amount Pr^3＋ - doped TiO2 on the photocatalytic activity of the composite particles were also discussed. The findings show us some significative information. （Ⅰ） We can get better active at a calcination temperature of 500 ℃ ; （Ⅱ）Photocatalytic activity could be improved by Pr^3＋ - doped TiO2 composite particles. While it is having a molar ratio of 0. 150%, the photocatalytic activity was the highest; （Ⅲ） Photocatalytic activity could be improved in the acid or alkali solution; （Ⅳ） The optimum dosage of photocatalytic was 2.5 g/L.
出处
《江西化工》
2007年第1期85-87,共3页
Jiangxi Chemical Industry
关键词
TIO2
Pr^3+掺杂
光催化活性
甲基橙
Titanium dioxide Pr^3＋ - doping photocatalytie activity methyl orange
