摘要
用水湿法得到掺氮TiO2前体,热处理后得到掺氮TiO2粉体,用XRD和UV-Vis吸收光谱等手段对制备的掺氮TiO2进行了表征,并研究了N-TiO2可见光光催化降解环境内分泌干扰物双酚A。结果表明掺氮TiO2在400℃下煅烧1h,所得粉体是锐钛矿相结构,粒径约12nm,与纯TiO2相比,吸收边明显红移。催化剂掺氮TiO2具有可见光催化活性,且明显高于纯TiO2。在双酚A初始浓度为40mg/L,催化剂掺氮TiO2的煅烧温度为400℃,投加量为0.6g/L,pH=5的条件下的降解效果最好达48.91%。
N-doped TiO2 was obtained by calcinating the precursor which was prepared by wet method in different conditions. The prepared powders were characterized by XRD and UV-Vis absorbance spectra and the photocatalytic degradation of bisphenol A （BPA） were also investigated using N-TiO2. Results showed that the sample calcinated at 400℃ for 1h was anatase and average particle size was about 12nm, with its optical absorption edge shifting toward the infrared with undoped TiO2. N-doped TiO2 has higher visible light activity under visible light than TiO2. The best condition for photodegradation of BPA was 40rng/L BPA, 0.6g/L N-doped TiO2, pH 5 and rate of photodegradation of BPA reached 48.91%.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第3期46-49,共4页
Environmental Science & Technology
