Atomically-thin Bi2MoO6 nanosheets with vacancy pairs for improved photocatalytic CO2 reduction

Di, Jun; Zhao, Xiaoxu; Lian, Cheng; Ji, Mengxia; Xia, Jiexiang; Xiong, Jun; Zhou, Wu; Cao, Xingzhong; She, Yuanbin; Liu, Honglai; Loh, Kian Ping; Pennycook, Stephen J.; Liu, Zheng

doi:10.1016/j.nanoen.2019.04.029

Cited by 255 publications

(119 citation statements)

References 28 publications

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“…Moreover, the surface adsorbed CO 2 and H 2 O have polarization affects that strongly impact electron affinity and photocatalytic reaction. Di et al introduced Bi‐O vacancy pairs in Bi 2 MoO 6 nanosheets by ion exchange process with BiOBr ultrathin nanosheets as the template. CO 2 adsorption isotherms test showed that the defective Bi 2 MoO 6 exhibits 7.4 times greater CO 2 adsorption than bulk samples, and that the key intermediate COOH• was observed from in situ FTIR.…”

Section: Vacancy Engineeringmentioning

confidence: 99%

Atomic‐Level Reactive Sites for Semiconductor‐Based Photocatalytic CO₂ Reduction

Zhang

Xia

Ran

et al. 2020

Advanced Energy Materials

316

252

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Photocatalytic CO2 reduction is an effective means to generate renewable energy. It involves redox reactions, reduction of CO2 and oxidation of water, that leads to the production of solar fuel. Significant research effort has therefore been made to develop inexpensive and practically sustainable semiconductor‐based photocatalysts. The exploration of atomic‐level active sites on the surface of semiconductors can result in an improved understanding of the mechanism of CO2 photoreduction. This can be applied to the design and synthesis of efficient photocatalysts. In this review, atomic‐level reactive sites are classified into four types: vacancies, single atoms, surface functional groups, and frustrated Lewis pairs (FLPs). These different photocatalytic reactive sites are shown to have varied affinity to reactants, intermediates, and products. This changes pathways for CO2 reduction and significantly impacts catalytic activity and selectivity. The design of a photocatalyst from an atomic‐level perspective can therefore be used to maximize atomic utilization efficiency and lead to a high selectivity. The prospects for fabrication of effective photocatalysts based on an in‐depth understanding are highlighted.

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Section: Vacancy Engineeringmentioning

confidence: 99%

Atomic‐Level Reactive Sites for Semiconductor‐Based Photocatalytic CO₂ Reduction

Zhang

Xia

Ran

et al. 2020

Advanced Energy Materials

316

252

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“…For example, Di et al proposed an unique self‐sacrificial template‐directed method for fabricating ultrathin Bi 2 MoO 6 . [ 117 ]…”

Section: Strategies For Synthesizing Thin‐layered Photocatalystsmentioning

confidence: 99%

“…Attracted by above mentioned advantages, various thin‐layered photocatalysts have been reported and exhibit potential application values in CO 2 reduction ( Table 2 ). [ 22,47,50,59,64, 66,89,92,117,136,146,193–205 ] For example, the single‐crystalline thin‐layered InVO 4 has been successfully fabricated by Zhou and co‐workers. As revealed by the AFM image, the height of the InVO 4 nanosheet is about 1.5 nm, corresponding to three unit cells.…”

Section: Photocatalytic Applicationsmentioning

confidence: 99%

Thin‐Layered Photocatalysts

Sun

Huang

Zhao

et al. 2020

Adv Funct Materials

129

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Semiconductor photocatalysis, a green and sustainable technology, is of great significance for solving environmental pollution and energy shortages. However, the common problems of inefficient light harvesting, rapid recombination of electron-hole pairs, and low surface reactive reaction sites for photocatalysts urgently need to be solved. In this regard, thin-layered photocatalysts are considered to be one of the most promising candidates for addressing these issues, due to their unique surface and electronic properties. In this review, the various strategies for constructing thin-layered photocatalysts are summarized, and emphasis is given to approaches for optimizing the photocatalytic performance of the thin-layered materials, which can be classified into surface engineering and junction construction. In addition, the photocatalytic applications of thin-layered materials, i.e., water splitting, CO 2 reduction, nitrogen fixation, and molecule oxygen activation, are summarized. Finally, based on current achievements in thin-layered photocatalysts, their future development and challenges are discussed.

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“…Recently, hydrothermal and solvothermal methods as well as ion‐exchange process have been developed to synthesize defect‐contained photocatalysts with the advantages of the facile set up, simple operations and low cost as well as desirable targets . For example, the defective g‐C 3 N 4 was produced via hydrothermal method (Figure c) .…”

Section: Strategies For Defects Generationmentioning

confidence: 99%

“…Typically, the harvesting range from 250 to 2500 nm toward full spectrum absorption of as‐synthesized D‐HNb 3 O 8 was realized for excellent PC hydrogen evolution (Figure b) . Bi 2 MoO 6 nanosheets were synthesized by template‐directed ion exchange approach, modulating electronic structure, and charge separation of defective Bi 2 MoO 6 . Therefore, these thermal treatment strategies are promising approaches for the design and the fabrication of the defective photocatalysts.…”

Section: Strategies For Defects Generationmentioning

confidence: 99%

Defect Engineering of Photocatalysts for Solar Energy Conversion

et al. 2020

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Solar energy conversion is one of the most versatile approaches for sustainable energy demands. The fundamental limitations for photocatalysis remain light absorption, charge separation, and photocatalytic (PC) performance of the catalysts. For the past few decades, defect engineering has been proven to be a promising solution for converting solar energy to chemical energy. In this regard, the recent progress of defect engineering toward solar energy conversion is summarized. Beginning with defects classification, the definition of various defects, synthesized strategies, and characterization techniques of controllable material defects are presented. The role of defect engineering on solar energy conversion is developed, extending light absorption, promoting charge separation, and facilitating stable PC reaction. The achievement of the defective photocatalysts is discussed toward versatile applications such as solar water splitting, CO2 reduction, nitrogen fixation, molecular activation, pollutants degradation, and solar cells. Finally, this Review, with regards to defect engineering, ends with the future opportunities and challenges for this exciting and emerging area for solar energy conversion.

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Atomically-thin Bi2MoO6 nanosheets with vacancy pairs for improved photocatalytic CO2 reduction

Cited by 255 publications

References 28 publications

Atomic‐Level Reactive Sites for Semiconductor‐Based Photocatalytic CO₂ Reduction

Atomic‐Level Reactive Sites for Semiconductor‐Based Photocatalytic CO₂ Reduction

Thin‐Layered Photocatalysts

Defect Engineering of Photocatalysts for Solar Energy Conversion

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Atomically-thin Bi2MoO6 nanosheets with vacancy pairs for improved photocatalytic CO2 reduction

Cited by 255 publications

References 28 publications

Atomic‐Level Reactive Sites for Semiconductor‐Based Photocatalytic CO2 Reduction

Atomic‐Level Reactive Sites for Semiconductor‐Based Photocatalytic CO2 Reduction

Thin‐Layered Photocatalysts

Defect Engineering of Photocatalysts for Solar Energy Conversion

Contact Info

Product

Resources

About

Atomic‐Level Reactive Sites for Semiconductor‐Based Photocatalytic CO₂ Reduction

Atomic‐Level Reactive Sites for Semiconductor‐Based Photocatalytic CO₂ Reduction