Insights into the Surface/Interface Modifications of Bi₂MoO₆: Feasible Strategies and Photocatalytic Applications

Abstract

Bi2MoO6, an eye‐catching member of the Aurivillius family, has recently drawn extensive interest in visible‐light‐driven photocatalytic environmental remediation and energy conversion by right of its salient features such as fascinating layered structure, appropriate band potentials, nontoxicity, and excellent thermal and chemical inertness. Enormous endeavors have been devoted to breaking out of its inherent flaws to further improve its unsatisfactory photocatalytic activity. Herein, a general overview is given to summarize the recent advances in the surface/interface modification strategies for fabricating highly active Bi2MoO6‐based nanostructures. The means and mechanisms of surface and interface modifications are concluded and discussed in some detail, including morphology regulation, facet control, defect engineering, metal deposition, and semiconductor combination. Moreover, representative photocatalytic applications of Bi2MoO6‐based nanostructures are also dialectically introduced and categorized into two main types: environmental contaminant removal and renewable energy development. Herein, the current research status of Bi2MoO6‐based photocatalysts is highlighted, informing a broad range of researchers abreast of these significant fields, as well as casting a glance at the challenges and potential of this material.

Dual-Site Synergetic Photochemical Activation of Chlorinated Phenols Triggered by Surface Hydroxyls of Photocatalysts under Visible Light

“…As the surface-charged state of materials might also have a great influence on the adsorption of pollutants, the charge distribution on the surface of as-prepared catalysts was ulteriorly measured through the ζ potential (Figures b and S14). In general, the electronegativity of BMO-001 mainly results from the oxygen atoms of bismuth oxide [Bi 2 O 2 ] 2+ units exposed in the outermost layer . Once mickle surface-bridging hydroxyls were introduced on the surface of BMO-001-3A, the protons of bridging hydroxyls can effectively reduce the surface electronegativity.…”

“…In general, the electronegativity of BMO-001 mainly results from the oxygen atoms of bismuth oxide [Bi 2 O 2 ] 2+ units exposed in the outermost layer. 39 Once mickle surface-bridging hydroxyls were introduced on the surface of BMO-001-3A, the protons of bridging hydroxyls can effectively reduce the surface electronegativity. As such, both BMO-001-3A and BMO-001- 3A-HNO 3 , modified with abundant surface-bridging hydroxyls, presented weaker electronegativity than BMO-001 and BMO-001-3A-KF.…”

Recent Progress on Metallic Bismuth‐Based Photocatalysts: Synthesis, Construction, and Application in Water Purification

“…Bi 2 MoO 6 , as Aurivillius‐based semiconductor with a narrow bandgap of about 2.8 eV, is also a charming visible‐light‐driven photocatalyst. [ 95 ] Bi/Bi 2 MoO 6 hollow microspheres (BMO‐HMS) photocatalysts have been successfully fabricated via a microwave‐assisted process of Bi 2 MoO 6 precursor in EG solution and then annealing in N 2 atmosphere by Li et al [ 96 ] The amount of glucose plays a significant part in the content of Bi in composites and the morphology of Bi 2 MoO 6 . In addition, microwave reaction time also influenced the morphology of Bi 2 MoO 6 .…”

Research Progress on Graphitic Carbon Nitride/Metal Oxide Composites: Synthesis and Photocatalytic Applications

“…Solar-energy-based photocatalysis is a promising technology to solve energy and environment problems, and has received extensive attention recently [ 5 , 6 , 7 ]. The synthesis of efficient photocatalysts is a key factor in applying photocatalytic technology to solve energy and environmental issues, such as water splitting to produce H 2 and O 2 [ 8 , 9 , 10 , 11 , 12 ], tail gas treatment (NO, CO 2 , etc.) [ 13 , 14 ], pollutant degradation [ 15 , 16 , 17 , 18 , 19 , 20 ], etc.…”