Lu Hui, Sha Simiao, Li Tong, Wen Qian, Yang Shaolin, Wu Jiandong, Wang Kang, Sheng Zhilin, Ma Jinfu
School of Materials Science and Engineering, North Minzu University, Yinchuan, China.
Yinchuan Aini Industrial Technology Development Co., Ltd, Yinchuan, China.
Front Chem. 2022 Nov 2;10:1061129. doi: 10.3389/fchem.2022.1061129. eCollection 2022.
Zinc oxide is a popular semiconductor used in catalysts due to its wide bandgap and high exciton binding energy. However, the photocatalytic performance of ZnO was compromised by its insufficient electron-hole separation efficiency and electron transfer rate. Herein, ZnO-reduced graphene oxide (rGO) composite solid catalyst was synthesized by one-step electrodeposition method on FTO substrate using lithium perchlorate (LiClO) as the supporting electrolyte. Scanning electron microscopy, Raman, Fourier Transform Infrared, and XRD characterizations confirmed the deposition of ZnO and the reduction of graphene oxide Owing to the cooperative effect between rGO and ZnO, the as-prepared ZnO-rGO composites show much enhanced photocatalytic degradation ability compared with pure ZnO nanorods. By optimizing the conditions of electrodeposition of ZnO-rGO composites, the degradation rate of methylene blue can reach 99.1% within 120 min. Thus, the simple preparation and the excellent performance could endow the ZnO-rGO composites with promising application in practical dye-polluted water treatment.
氧化锌是一种因宽带隙和高激子结合能而常用于催化剂的半导体。然而，氧化锌的光催化性能因其电子-空穴分离效率和电子转移速率不足而受到影响。在此，以高氯酸锂（LiClO）作为支持电解质，通过一步电沉积法在FTO基底上合成了氧化锌-还原氧化石墨烯（rGO）复合固体催化剂。扫描电子显微镜、拉曼光谱、傅里叶变换红外光谱和XRD表征证实了氧化锌的沉积以及氧化石墨烯的还原。由于rGO和氧化锌之间的协同效应，与纯氧化锌纳米棒相比，所制备的氧化锌-rGO复合材料表现出大大增强的光催化降解能力。通过优化氧化锌-rGO复合材料的电沉积条件，亚甲基蓝在120分钟内的降解率可达99.1%。因此，简单的制备方法和优异的性能可使氧化锌-rGO复合材料在实际染料污染水处理中具有广阔的应用前景。
