纳米掺氮TiO_2可见光降解甲醛的研究

Study on Visible Light Degradation of Formaldehyde Using N-doped TiO_2 Nano-powder

用水湿法得到掺氮TiO2前体,热处理后得到纳米掺氮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,研究了N-TiO2可见光光催化降解甲醛。结果表明掺氮TiO2与纯TiO2相比,具有可见光活性,当400℃煅烧1h的掺氮TiO2粉体投加量为1.4g/L,光照140min时,降解甲醛效果可达87.63%,明显优于纯TiO2。

N-doped TiO2 precursor were prepared by wet method. N-doped TiO2 nano-powder was obtained by caleinating. The prepared powders were characterized by XRD and UV-Vis absorbance spectra and the photocatalytic degration of formaldehyde were also investigated using N-TiO2. The results show N-doped TiO2 has higher visible light activity under visible light. After 140 min irradiation, the rate of photodegration of formaldehyde reaches 87.63% under the conditions of C0（N-doped TiO2） at 1.4 g/L and the sample calcinated at 400℃ for 1h.