Department of Environmental Science and Engineering, School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
J Hazard Mater. 2010 Jun 15;178(1-3):560-5. doi: 10.1016/j.jhazmat.2010.01.121. Epub 2010 Feb 1.
Visible light responsive C,N-modified porous monolithic titania (MT(f)) has been successfully synthesized. The template-free sol-gel synthesis method accompanied by phase separation and in situ C,N-modification has been used. The molar ratio of water to tetrabutyl titanate (f) in starting solution plays an important role in the porous structure and photoactivity of MT(f). Scanning electron microscopy (SEM) analysis and N(2) adsorption-desorption analysis show that MT(f) possess mesoporous structure as well as macroporous structure. MT(22) has been further characterized by using X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and UV-vis diffuse reflectance spectra (DRS). The results show that both nitrogen and carbon elements exist in MT(22) and result in the visible light photocatalytic activity of MT(22). The observed reaction rate of decolorization of methyl orange is 0.0026 min(-1).
可见光响应的 C、N 修饰多孔整体式二氧化钛 (MT(f)) 已被成功合成。使用了无模板的溶胶-凝胶合成方法，伴随相分离和原位 C、N 修饰。起始溶液中，水与四丁基钛酸酯 (f) 的摩尔比在 MT(f) 的多孔结构和光活性中起着重要作用。扫描电子显微镜 (SEM) 分析和 N2 吸附-解吸分析表明，MT(f) 具有介孔结构和大孔结构。MT(22) 进一步通过 X 射线粉末衍射 (XRD)、X 射线光电子能谱 (XPS) 和紫外-可见漫反射光谱 (DRS) 进行了表征。结果表明，氮和碳元素都存在于 MT(22) 中，导致 MT(22) 的可见光光催化活性。观察到的甲基橙脱色反应速率为 0.0026 min(-1)。
