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Fe³⁺-N改性二氧化钛光催化剂的研制

Study on the Preparation of Fe³⁺-N Doped TiO₂ Photocatalyst

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【Author】 JIAN Li-xin~1,YIN Xiao-qiu~3,XIANG Jian-nan~2,YIN Xia~2(1.State Key Laboratory of Chemo/Biosensing and Chemometrics,Hunan Univ,Changsha,Hunan 410082,China;2.College of Chemistry and Chemical Engineering,Hunan Univ,Changsha,Hunan 410082,China;3.Hospital of Hunan Univ,Changsha,Hunan 410082,China)

【机构】湖南大学化学生物传感与计量学国家重点实验室；湖南大学医院；湖南大学化学化工学院；湖南大学化学化工学院湖南长沙410082；湖南长沙410082；

【摘要】利用微波等离子体沉膜技术和溶胶-凝胶法在载玻片上制备同时掺Fe3+和N的TiO2膜,经500℃焙烧后所得光催化剂性能较好.分别以紫外和可见光为光源,光催化降解茜素红,结果发现:掺铁量均为0.1%的Fe-N/TiO2较Fe/TiO2的光催化活性好,而且可见光的利用率明显增强;UV-Vis扫描显示掺铁0.1%的Fe-N/TiO2紫外吸收峰较其他TiO2光催化剂强且明显红移.XRD谱图结果表明,分别在500℃和550℃焙烧后的0.1%Fe-N/TiO2,均为锐钛矿型,晶体粒度分别为15.3 nm和20.6 nm,XPS谱图显示Fe-N/TiO2有N1s谱峰.更多还原

【Abstract】 A film of Fe3+-N doped titanium dioxide was coated on glass-slide with sol-gel and microwave plasma-deposition technique,the film was calcined at 500 ℃ and an excellent TiO₂ photocatalyst was formed.Through degrading alizarin red,we discovered that catalytic activity of Fe-N/TiO₂ was better than Fe/TiO₂ under both UV light and Vis light when the mass percentage of Fe³⁺ doped was 0.1%,and the availability of vis light increased;The absoption peaks of doped-Fe₃+0.1% Fe-N/TiO₂ were stronger than the other TiO₂ and had red shift.The XRD spectra showed that doped-Fe³⁺0.1% Fe-N/TiO₂ obtained at 500 ℃ and 550 ℃ kept anatase and the relative anatase crystals had the size of 15.3 nm and 20.6 nm respectively,and the N1s XPS spectra was observed.更多还原