Li W, He Y, Bao W B, Bao H L, Li D Y, Zhang C L, Wang M
School of Architecture and Civil Engineering, Shenyang University of Technology, Shenyang, Liaoning, China.
School of Materials Science and Engineering, Liaoning Technical University, Fuxin, Liaoning, China.
Front Chem. 2023 Mar 9;11:1113186. doi: 10.3389/fchem.2023.1113186. eCollection 2023.
This study proposed a technique to enhance the photocatalytic properties of TiO using graphene oxide (GO) and modified Montmorillonite (M-MMT). TiO/GO/M-MMT nano-heterostructured composites were prepared hydrothermal and co-precipitation. The photocatalytic performance was evaluated by investigating the photodegradation rate and absorption behavior of methyl orange (MO) under visible light irradiation. The results showed that TiO/GO/M-MMT heterojunction exhibited excellent photocatalytic degradation performance, as the degradation rate of MO was observed to be 99.3% within 150 min. The density of adsorbed MO decreased by 62.1% after 210 min of dark adsorption using the TiO/GO/M-MMT composite, which was significantly higher than that achieved using M-MMT, GO/M-MMT, and TiO/M-MMT. The nano-heterostructure increased the effective interface between TiO, GO, and MMT, which increased the charge transfer ability and prolonged the electron-hole separation time. Therefore, the results of this study can be used to design novel photocatalysts to eradicate environmental pollutants.
本研究提出了一种利用氧化石墨烯（GO）和改性蒙脱石（M-MMT）来增强二氧化钛（TiO）光催化性能的技术。采用水热法和共沉淀法制备了TiO/GO/M-MMT纳米异质结构复合材料。通过考察可见光照射下甲基橙（MO）的光降解速率和吸附行为来评估其光催化性能。结果表明，TiO/GO/M-MMT异质结表现出优异的光催化降解性能，在150分钟内MO的降解率达到99.3%。使用TiO/GO/M-MMT复合材料在黑暗中吸附210分钟后，MO的吸附密度下降了62.1%，这显著高于使用M-MMT、GO/M-MMT和TiO/M-MMT所达到的吸附密度。纳米异质结构增加了TiO、GO和MMT之间的有效界面，提高了电荷转移能力并延长了电子-空穴分离时间。因此，本研究结果可用于设计新型光催化剂以消除环境污染物。
