Balta Zeynep, Bilgin Simsek Esra, Berek Dusan
Department of Chemical and Process Engineering, Faculty of Engineering, Yalova University, Yalova, Turkey.
Polymer Institute, Slovak Academy of Sciences, Bratislava, Slovakia.
Photochem Photobiol. 2019 Nov;95(6):1331-1338. doi: 10.1111/php.13117. Epub 2019 Jul 6.
Carbon fiber (CF)-based WO /TiO composite catalysts (WO /TiO /CF) were successfully synthesized by solvothermal method. The catalysts were characterized by XPS, SEM, BET, XRD, FTIR, Raman and UV-Vis. The analyses confirmed the WO /TiO nanoparticles with high crystallinity deposited on the carbon structure. The photocatalytic degradation of Orange II azo dye under UV and sunlight illumination with the synthesized catalyst was explored. The composite catalyst displayed high performance (85%) for Orange II degradation while that of for WO /TiO was found as 76%. The effects of CF amount, solution pH, initial dye concentration and catalyst dose on photocatalytic performance were studied. It was found that the degradation efficiency increased from 68% to 90% with the increasing CF amount from 3 wt% to 5 wt%, while the further increase in CF amount (7-10 wt%) decreased the photodegradation due to the blocking the active sites of WO /TiO . The enhanced photocatalytic efficiency was mainly attributed to the electrical properties of the CF and reduced bandgap.
通过溶剂热法成功合成了基于碳纤维（CF）的WO₃/TiO₂复合催化剂（WO₃/TiO₂/CF）。采用XPS、SEM、BET、XRD、FTIR、拉曼光谱和紫外可见光谱对催化剂进行了表征。分析证实了具有高结晶度的WO₃/TiO₂纳米颗粒沉积在碳结构上。研究了合成催化剂在紫外光和太阳光照射下对偶氮染料橙黄II的光催化降解性能。复合催化剂对橙黄II的降解表现出高性能（85%），而WO₃/TiO₂的降解率为76%。研究了CF用量、溶液pH值、初始染料浓度和催化剂用量对光催化性能的影响。结果发现，随着CF用量从3 wt%增加到5 wt%，降解效率从68%提高到90%，而CF用量进一步增加（7 - 10 wt%）由于堵塞了WO₃/TiO₂的活性位点而降低了光降解率。光催化效率的提高主要归因于CF的电学性质和减小的带隙。
