摘要：用火焰化学气相沉积法,分别以氨气为氮源、TiCl₄为TiO₂前驱体,在丙烷-空气湍流火焰中氧化制备氮掺杂纳米TiO₂颗粒,以及用TiCl4为TiO₂前驱体,在丙烷-空气湍流火焰中氧化制备纳米TiO₂颗粒,然后在管式炉中,在氨气的环境下高温煅烧制备氮掺杂纳米TiO₂颗粒。利用X射线衍射仪、紫外可见光谱仪、透射电子显微镜、X射线光电子能谱等分析方法对两种方法所制备的样品进行表征。结果表明:在相同的氨气流量下,火焰化学气相沉积法直接制备的氮掺杂纳米TiO2颗粒在波长400～500 nm的可见光的吸收强度大,氮掺杂量多。

关键词：纳米TiO₂颗粒；氮掺杂；火焰化学气相沉积法

Abstract： The flame chemical vapor deposition（CVD） method was used to prepare TiO₂ nano-particles using ammonia gas as nitrogen source， TiCl₄ as the precursor of TiO2 ， the oxidation of titanium tetrachloride （TiCl₄） in propane-air turbulent flame. First， TiCl₄ was used as the precursor of TiO₂ to prepare TiO₂ nano-particles in propane -air turbulent flame. Then， the N-doped TiO₂ nano-particles were calcined in the ambience of ammonia under high temperature in tube furnace. The samples prepared by the two methods were investigated by X-ray diffraction， UV-Vis spectrometer， transmission electron microscopy， X-ray photoelectron spectroscopy. The results showed that the N-doped TiO2 nano-particles directly prepared by CVD method had high absorbance in the range of 400~500 nm and more amount of nitrogen doping under the same flow rate of ammonia. 

Keywords： TiO₂ nano-particles； N-doped； flame chemical vapor deposition method