Wang Weilin, Wang Zhaofeng, Liu Jingjing, Luo Zhu, Suib Steven L, He Peng, Ding Guqiao, Zhang Zhengguo, Sun Luyi
Ministry of Education Key Laboratory of Enhanced Heat Transfer &Energy Conservation, School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou, Guangdong 510640, China.
Institute of Materials Science, University of Connecticut, Storrs, Connecticut 06269, United States.
Sci Rep. 2017 Apr 21;7:46610. doi: 10.1038/srep46610.
A hybrid photocatalyst based on anatase TiO was designed by doping TiO with sulfur and incorporating reduced graphene oxide (TiO-S/rGO hybrid), with an aim to narrow the band gap to potentially make use of visible light and decrease the recombination of excitons, respectively. This TiO-S/rGO hybrid was successfully synthesized using a one-pot hydrothermal method via single-step reaction. The structure and morphology of the TiO-S/rGO hybrid catalyst was carefully characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). Its photocatalytic reactivity was evaluated by the degradation of methyl blue. The results showed that both the doping of sulfur and the introduction of rGO worked as designed, and the TiO-S/rGO hybrid exhibited high photocatalytic activity under simulated sunlight. Considering both the facile and scalable reaction to synthesize TiO-S/rGO hybrid, and its excellent photocatalytic performance, such TiO-S/rGO hybrids are expect to find practical applications in environmental and energy sectors.
通过用硫掺杂二氧化钛（TiO₂）并引入还原氧化石墨烯（TiO₂-S/rGO 杂化物）设计了一种基于锐钛矿型 TiO₂ 的复合光催化剂，目的分别是缩小带隙以潜在地利用可见光以及减少激子的复合。采用一步反应的一锅水热法成功合成了这种 TiO₂-S/rGO 杂化物。通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和 X 射线光电子能谱（XPS）对 TiO₂-S/rGO 复合催化剂的结构和形貌进行了仔细表征。通过甲基蓝的降解评估了其光催化活性。结果表明，硫的掺杂和 rGO 的引入均按设计发挥了作用，TiO₂-S/rGO 杂化物在模拟太阳光下表现出高光催化活性。考虑到合成 TiO₂-S/rGO 杂化物的反应简便且可扩展，以及其优异的光催化性能，预计这种 TiO₂-S/rGO 杂化物将在环境和能源领域找到实际应用。
