摘要：

以钛酸四丁酯、硝酸铋和尿素为原料,采用溶胶-凝胶法制备了不同掺杂量的铋和氮的单掺杂及共掺杂TiO₂光催化剂。以活性黑KN-B为模拟染料废水考察了所制备TiO₂的光催化性能,研究了染料光催化降解的影响因素。结果表明,铋和氮共掺杂TiO₂比TiO₂及单掺杂TiO₂的光催化活性要高。当Bi_0.5N_8.0/TiO₂的投加量为4.0 g/L,活性黑KN-B初始质量浓度为40 mg/L,pH为2.23,在125 W汞灯下光照20 min时,活性黑KN-B的降解率接近99.9%。将铋和氮共掺杂TiO₂用于其他染料的光催化降解,均显示出良好的光催化活性。

关键词: 二氧化钛, 光催化, 共掺杂, 活性黑KN-B

Abstract:

the prepared Ti0₂ is investigated by using activated black KN-B as simulated dyestuff wastewater. The influencing factors of dyestuff photo-catalytic degradation are studied. The results show that the photo-catalytic activity of Bi and N co-doped Ti0₂ is higher than that of Bi or N single doped Ti0₂.When the dosage of Bi_0.5N_8.0/TiO₂ is 4.0g/L，activated black KN-B initial mass concentration 40 mg/L , pH 2.23 , with 125 W mercury light irradiation for 20 min，the degradation rate of activated black KN-B is close too 99.9%.When Bi and N co-doped Ti0₂ is used for the photo-catalytic degradation of other dyestuffs，good photo-catalytic activity are shown，too.

Key words: titanium dioxide, photo-catalysis, co-doped, activated black KN-B

中图分类号: 

• X703.1