Shan Wenjie, Hu Yun, Zheng Mengmeng, Wei Chaohai
The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters, Ministry of Education, School of Environment and Energy, South China University of Technology, Guangzhou 510006, P. R. China.
Dalton Trans. 2015 Apr 28;44(16):7428-36. doi: 10.1039/c5dt00381d.
Mesoporous SiO2 coated Cu-Bi2O3 thin films (meso-SiO2/Cu-Bi2O3) were prepared on glass substrates using a simple sol-gel/spin-coating method. The structure and optical properties were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, a UV-vis spectrophotometer and a water contact angle meter. The photocatalytic activity and self-cleaning properties of the films were investigated through the degradation of methyl orange and stearic acid, respectively. It was found that the meso-SiO2/Cu-Bi2O3 thin films were highly transparent and showed excellent superhydrophilicity even in the dark. The thin films exhibited enhanced photocatalytic activity and self-cleaning properties compared to pure Bi2O3 films, which was attributed to the cooperation of the interfacial charge transfer between Bi2O3 and surface Cu species as well as the unique mesoporous SiO2 structure. The results showed that the films can be used as promising self-cleaning and antifogging materials.
采用简单的溶胶-凝胶/旋涂法在玻璃基板上制备了介孔SiO₂包覆的Cu-Bi₂O₃薄膜（介孔SiO₂/Cu-Bi₂O₃）。利用X射线衍射、X射线光电子能谱、紫外可见分光光度计和水接触角测量仪对其结构和光学性能进行了表征。分别通过甲基橙和硬脂酸的降解研究了薄膜的光催化活性和自清洁性能。结果发现，介孔SiO₂/Cu-Bi₂O₃薄膜具有高透明度，即使在黑暗中也表现出优异的超亲水性。与纯Bi₂O₃薄膜相比，该薄膜表现出增强的光催化活性和自清洁性能，这归因于Bi₂O₃与表面Cu物种之间的界面电荷转移以及独特的介孔SiO₂结构的协同作用。结果表明，该薄膜有望用作自清洁和防雾材料。
