Wei Min, Peng Xue-Lei, Liu Qi-Sheng, Li Fang, Yao Ming-Ming
Key Laboratory of Interfacial Reaction & Sensing Analysis in Universities of Shandong, School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China.
Jinan Institute of Product Quality Inspections, Jinan 250022, China.
Molecules. 2017 Jun 14;22(6):950. doi: 10.3390/molecules22060950.
In order to effectively photodegradate organic pollutants, ZnO composite and Co-B codoped TiO₂ films were successfully deposited on glass substrates via a modified sol-gel method and a controllable dip-coating technique. Combining with UV-Vis diffuse reflectance spectroscopy (DRS) and photoluminescence spectra (PL) analyses, the multi-modification could not only extend the optical response of TiO₂ to visible light region but also decrease the recombination rate of electron-hole pairs. XRD results revealed that the multi-modified TiO₂ film had an anatase-brookite biphase heterostructure. FE-SEM results indicated that the multi-modified TiO₂ film without cracks was composed of smaller round-like nanoparticles compared to pure TiO₂. BET surface area results showed that the specific surface area of pure TiO₂ and the multi-modified TiO₂ sample was 47.8 and 115.8 m²/g, respectively. By degradation of formaldehyde and oxytetracycline, experimental results showed that the multi-modified TiO₂ film had excellent photodegradation performance under visible light irradiation.
为了有效光降解有机污染物，通过改进的溶胶-凝胶法和可控浸涂技术成功地在玻璃基板上沉积了ZnO复合材料和Co-B共掺杂TiO₂薄膜。结合紫外-可见漫反射光谱（DRS）和光致发光光谱（PL）分析，这种多改性不仅可以将TiO₂的光学响应扩展到可见光区域，还可以降低电子-空穴对的复合率。XRD结果表明，多改性TiO₂薄膜具有锐钛矿-板钛矿双相异质结构。FE-SEM结果表明，与纯TiO₂相比，无裂纹的多改性TiO₂薄膜由较小的圆形纳米颗粒组成。BET表面积结果显示，纯TiO₂和多改性TiO₂样品的比表面积分别为47.8和115.8 m²/g。通过对甲醛和土霉素的降解实验结果表明，多改性TiO₂薄膜在可见光照射下具有优异的光降解性能。
