摘要
以钛酸四丁酯为前驱物,采用水解沉淀法制备了N掺杂TiO_2光催化剂和H_2O_2改性的N掺杂TiO_2光催化剂。实验表明,H_2O_2改性的N掺杂TiO_2光催化剂的最佳制备条件为:氨水(质量分数28%)加入量20 mL,焙烧温度500℃,H_2O_2(质量分数30%)加入量2.0 mL。日光下,N掺杂TiO_2光催化剂及H_2O_2改性的N掺杂TiO_2光催化剂在反应90 min时的活性红紫去除率达99%,它们对活性红紫的去除率远高于P_(25)TiO_2光催化剂。H_2O_2改性的N掺杂TiO_2光催化剂中N质量分数比改性前明显提高,制备的两种催化剂中不仅含有N元素,同时还含有C和H元素。
Using Ti（ OC4H9 ）4 as the reaction precursor, the compounded photocatalyst N-doped TiO2 was prepared by hydrolysis-precipitation method, and then modified by H2O2. The optimum conditions for preparation of H2O2-modified N-doped TiO2 are as follows： ammonia dosage 20 mL （with 28% of mass fraction）, calcination temperature 500 ℃, H2O2 dosage 2.0 mL（ with 30% of mass fraction）. After 90 min of reaction on N-doped TiO2 or H2O2 -modified N-doped TiO2 under sunlight, the removal efficiencies of reactive red-violet by the two photocatalysts are both 99%, which are greatly higher than that by photocatalyst P25TiO2. Compared with N-doped TiO2, the mass fraction of N in H2OE-modified N-doped TiO2 is significantly increased. Both of the two photocatalysts contain not only element N, but also elements C and H.
出处
《化工环保》
CAS
CSCD
北大核心
2009年第5期467-470,共4页
Environmental Protection of Chemical Industry
基金
教育部博士点新教师基金资助项目(200802551001)
关键词
二氧化钛
光催化剂
氮
掺杂
过氧化氢
改性
催化活性
titanium dioxide
photocatalyst
nitrogen
doping
hydrogen peroxide
modification
catalytic activity
