纳米掺氮TiO_2可见光降解环境内分泌干扰物BPA研究

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%。

Visible Light Degradation of Bisphenol A in Water Using N-doped TiO_2 Nano-powder

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 40mg/L BPA,0.6g/L N-doped TiO2,pH 5 and rate of photodegradation of BPA reached 48.91%.