Ag-decorated 3D flower-like Bi2MoO6/rGO with boosted photocatalytic performance for removal of organic pollutants

• 作者: Xin Liu Wei-Ya Huang Qin Zhou Xi-Rong Chen Kai Yang Dan Li Dionysios D.Dionysiou
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1086-1098
• 页数: 13页
• 语种: 英文

摘要

A series of unique 3D flower-like Bi2MoO6(BMO)/reduced graphene oxide(rGO)heterostructured composites decorated with varying amounts of Ag nanoparticles(NPs)were fabricated.Their morphological characteristics,structural features,energy band structures and photoelectrochemical properties were systematically studied.All the Ag/BMO/rGO ternary composites(AgBG-y;y = 1％,2％and 3％)demonstrated greater photocat-alytic activity towards efficient removal of our selected organic models[methyl orange(MO),rhodamine B(RhB)and phenol],as compared with the BMO/rGO binary composites(BG-x;x = 0.25,2,4 and 5).Particularly,AgBG-2％,which was synthesized with the addition of 2 wt％rGO and 2 wt％Ag in BMO,possessed superior photocatalytic activity.The fitted rate constants(k)for the photocatalytic degradation of RhB,MO and phenol using AgBG-2％were estimated to be 0.0286,0.0301 and 0.0165 min-1,respectively,which were over one order of magnitude greater than those obtained using pure BMO.Several factors may contribute to the observed enhance-ment,including greater specific surface area,enhanced light absorption,promoted spatial separation of electron-hole(e-h+)pairs and their suppressed recombination,especially benefiting from the synergistic effects among BMO,rGO and Ag NPs.Our work suggests that the rational design of BMO/rGO/Ag ternary composite was an effective strategy to boost the photocatalytic activity of the resulting catalyst towards the highly efficient removal of organic pollutants from water.