Shen Yang, Yuan Zhihao, Cheng Fengjiao, Cui Zhen, Ma Deming, Bai Yueyue, Zhao Shuqing, Deng Jieyao, Li Enling
School of Science, Xi'an University of Technology, Xi'an, China.
School of Electrical Engineering, Xi'an University of Technology, Xi'an, China.
Front Chem. 2022 Aug 15;10:992482. doi: 10.3389/fchem.2022.992482. eCollection 2022.
ZnO/Graphene (G)/Graphene Oxide (GO)/Multi-walled Carbon Nanotube (MCNT) composite aerogels with a three-dimensional porous structure were prepared by the sol-gel method under average temperature and alkaline conditions, combined with freeze-drying process and heat treatment process. The photocatalytic degradation of Rhodamine B (RhB) was mainly studied. The scanning electron microscope (SEM) test results showed that the morphology uniformity of the ZnO/G/GO/MCNT composite aerogel was significantly enhanced, which effectively solving the agglomeration problem of MCNT and ZnO. The photocatalytic degradation test results of RhB show that due to the synergistic effect of physical adsorption and photocatalytic degradation, the total degradation efficiency of RhB by ZnO/G/GO/MCNT could reach 86.8%, which is 3.3 times higher than that of ZnO. In addition, the synergistic effect of ZnO and G effectively hinders the recombination of photo-generated electron-hole pairs and enhances photocatalytic activity. The ZnO/G/GO/MCNT composite aerogel can be applied in the visible light catalytic degradation of water pollution.
采用溶胶 - 凝胶法，在常温及碱性条件下，结合冷冻干燥工艺和热处理工艺，制备了具有三维多孔结构的氧化锌/石墨烯（G）/氧化石墨烯（GO）/多壁碳纳米管（MCNT）复合气凝胶。主要研究了其对罗丹明B（RhB）的光催化降解性能。扫描电子显微镜（SEM）测试结果表明，氧化锌/石墨烯/氧化石墨烯/多壁碳纳米管复合气凝胶的形态均匀性显著提高，有效解决了多壁碳纳米管和氧化锌的团聚问题。罗丹明B的光催化降解测试结果表明，由于物理吸附和光催化降解的协同作用，氧化锌/石墨烯/氧化石墨烯/多壁碳纳米管对罗丹明B的总降解效率可达86.8%，是氧化锌的3.3倍。此外，氧化锌与石墨烯的协同作用有效阻碍了光生电子 - 空穴对的复合，提高了光催化活性。氧化锌/石墨烯/氧化石墨烯/多壁碳纳米管复合气凝胶可应用于水污染的可见光催化降解。
