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Rare Metals
Published in: Rare Metals 5/2021

09-09-2020 | Original Article

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

Authors: Xin Liu, Wei-Ya Huang, Qin Zhou, Xi-Rong Chen, Kai Yang, Dan Li, Dionysios D. Dionysiou

Published in: Rare Metals | Issue 5/2021

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Abstract

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 photocatalytic 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 enhancement, 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.

Graphic abstract

This work presents the construction of Ag NPs-decorated 3D flower-like Bi2MoO6 (BMO)/reduced graphene oxide (rGO) ternary composites as effective photocatalysts for efficient removal of organic pollutants under solar light irradiation. The separation efficiency of photogenerated charge carriers is significantly promoted by the synergistic effect of Ag NPs, BMO and rGO.
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Appendix
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Metadata
Title
Ag-decorated 3D flower-like Bi2MoO6/rGO with boosted photocatalytic performance for removal of organic pollutants
Authors
Xin Liu
Wei-Ya Huang
Qin Zhou
Xi-Rong Chen
Kai Yang
Dan Li
Dionysios D. Dionysiou
Publication date
09-09-2020
Publisher
Nonferrous Metals Society of China
Published in
Rare Metals / Issue 5/2021
Print ISSN: 1001-0521
Electronic ISSN: 1867-7185
DOI
https://doi.org/10.1007/s12598-020-01574-3

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