用火焰化学气相沉积法,分剐以氨气为氮源、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.%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-particlas 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.
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