【正文】 all of the semiconductor photocatalyst used in the catalytic reaction, TiO2 because of its nontoxic, antilight corrosion, oxidation ability, high catalytic activity, good stability, and low cost nature of the most monly used. The study, prepared by hightemperature heat treatment of ammoniamodified titanium dioxide powder. Select tetrabutyl titanate as precursor, ethanol as the solvent. After the preparation of the precursor, the heat treatment at different temperatures and for preparing nitrogen utilization of hightemperature vacuum heat treatment conditions ammoniadoped titanium dioxide powder. And the use of Xray diffraction (XRD) and UV visible absorption curve (UVVis) were characterized. Use of methylene blue analog degradation, select titania powders prepared photocatalytic experimental performance of the test. The results show that under the same conditions as temperature, vacuum calcination of titanium dioxide powder can get better photocatalytic properties. In the same heat treatment conditions at 550oC can get better photocatalytic properties. Visible light titanium dioxide powder preparation of the catalyst, with a certain wavelength of a certain concentration of methylene blue solution, experiments show that titanium dioxide powder on the degradation of methylene blue solution has obvious catalysis. Key words： Nitrogen doping； Heat Treatment； Titanium dioxide； Photocatalytic. III 目 錄 摘 要 ................................................................................................................................ I ABSTRACT .......................................................................................................................... II 二氧化鈦的研究背景及現(xiàn)狀 ............................................................................. 1 二氧化鈦光催化技術(shù) ......................................................................................... 1 光催化技術(shù)現(xiàn)階段應(yīng)用 ........................................................................... 1 二氧化鈦 光催化 過程及機(jī)理 ................................................................... 2 影響光催化特性的因素 ............................................................................ 3 二氧化鈦 的改性及 光催化 ................................................................................. 4 二氧化鈦的改性 ........................................................................................ 4 金屬摻雜 ................................................................................................... 4 非金屬摻雜 ............................................................................................. 4 氮摻雜 二氧化鈦 粉體 的制備方法 ..................................................................... 5 高溫焙燒法 ............................................................................................... 5 水解沉淀法 ................................................................................................ 5 有機(jī)前驅(qū)體熱解法 ................................................................................... 6 溶膠 凝膠法（ SolGel） .......................................................................... 6 機(jī)械化學(xué)法 ............................................................................................... 6 課題研究?jī)?nèi)容與意義 ..................................................................................... 6 2 實(shí)驗(yàn)部分 ....................................................................................................................... 8 實(shí)驗(yàn)藥品及儀器 ................................................................................................. 8 實(shí)驗(yàn)藥品和試劑 ....................................................................................... 8 實(shí)驗(yàn)儀器 ................................................................................................... 8 二氧化鈦 光粉體 的制備 ..................................................................................... 8 實(shí)驗(yàn)前的準(zhǔn)備 ........................................................................................... 8 二氧化鈦 前驅(qū)體 的制備 ............................................................................ 9 不同溫度下二氧化鈦光催化劑的制備 .................................................... 9 不同熱處理?xiàng)l件下二氧化鈦光催化劑的制備 ........................................ 9 二氧化鈦 粉體 的表征 及分析 ............................................................................. 9 X 射線衍射 （ XRD）表征及分析 ............................................................ 9 紫外 可見光吸收光譜表征 及分析 ...........................