State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, PR China.
State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan, 430074, Hubei, PR China.
Chemosphere. 2017 Apr;172:147-154. doi: 10.1016/j.chemosphere.2016.12.103. Epub 2016 Dec 22.
In this paper, a facile process was developed for anchoring of silver nanoparticles on graphitic carbon nitride sheets (Ag/g-CN) with high catalytic activity for reduction of 4-nitrophenol. The morphology and structure of the as-prepared Ag/g-CN composite were investigated by FESEM, TEM, XRD and XPS. The reaction mechanism and the reduction kinetics of 4-nitrophenol under different light irradiation were systematically studied. The results showed that the obtained Ag/g-CN composite exhibited a much higher electro/photo catalytic activity and stability for reduction of 4-nitrophenol. Significantly, due to the synergistic effect and interaction between highly dispersed Ag nanoparticles (Ag NPs, ∼7.2 nm) and lamellar g-CN, not only transfer of interfacial charge, but also the separation of photoinduced electrons occurred when the reaction was proceeded under light. In addition, the composite exhibited high stability and reusability during the cycling experiments. The results showed that the Ag/g-CN composite is an effective and stable electro/photo catalyst for reduction of 4-nitrophenol.
本文开发了一种简便的方法，将银纳米粒子锚定在石墨相氮化碳薄片（Ag/g-CN）上，得到具有高催化活性的复合材料，用于还原 4-硝基苯酚。通过 FESEM、TEM、XRD 和 XPS 对所制备的 Ag/g-CN 复合材料的形貌和结构进行了研究。系统研究了不同光照下 4-硝基苯酚的反应机理和还原动力学。结果表明，所得到的 Ag/g-CN 复合材料在还原 4-硝基苯酚方面表现出更高的电/光催化活性和稳定性。显著的是，由于高度分散的 Ag 纳米粒子（Ag NPs，约 7.2nm）和层状 g-CN 之间的协同效应和相互作用，不仅在光下进行反应时发生了界面电荷转移，而且还发生了光诱导电子的分离。此外，该复合材料在循环实验中表现出高稳定性和可重复使用性。结果表明，Ag/g-CN 复合材料是一种有效且稳定的电/光催化剂，可用于还原 4-硝基苯酚。
