The interplay between selective etching induced cation defects and active oxygen species for volatile organic compounds degradation

Li, Zhen; Wang, Xiyang; Zeng, Minli; Chen, Kunyu; Cao, Dehua; Huang, Yiwei; Zhu, Yanqiu; Zhang, Wenhua; Wang, Nannan; Wu, Yimin A.

doi:10.1016/j.jcis.2022.06.037

Cited by 18 publications

(1 citation statement)

References 31 publications

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“…In another example, the surface of CuWO 4 was selectively etched using metal ion chelation in acetic acid and ammonium hydroxide to create cationic defects. 167 These defects enhance the hybrid orbitals of metaloxygen bonds, thereby increasing the activity of lattice oxygen and metal sites on the surface. CuWO 4 with cationic defects exhibits 33 times higher activity than the pristine CuWO 4 .…”

Section: Defect Engineeringmentioning

confidence: 99%

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Wang,

Liu,

Zhang

et al. 2023

EcoEnergy

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Photoelectrochemical (PEC) water splitting with zero carbon emissions is a promising technology to solve the global issues of energy shortage and environmental pollution. However, the current development of PEC systems is facing a bottleneck of low solar‐to‐hydrogen (STH) efficiency (<10%), which cannot meet the demand of large‐scale H2 production. The development of low‐cost, highly active, and stable photoanode materials is crucial for high STH efficiency of PEC water splitting. The recent development of BiVO4 as photoanode materials for PEC water splitting has been a great success, and ABO4‐type ternary metal oxides with a similar structure to BiVO4 have high development potential as efficient photoanodes for high‐performance PEC water splitting. The design and development of ABO4 photoanodes for PEC water splitting are critically reviewed with special emphasis on the modification strategies and performance improvement mechanisms of each semiconductor. The comprehensive analysis in this review provides guidelines and insights for the exploration of new high‐efficiency photoanodes for solar fuel production.

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Section: Defect Engineeringmentioning

confidence: 99%

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Wang,

Liu,

Zhang

et al. 2023

EcoEnergy

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Synthesis of Heteromorphic Bi₂WO₆ Films With an Interpenetrate 1D/2D Network Structure for Efficient and Stable Photocatalytic Degradation of VOCs

Chen,

Zhang,

Chen

et al. 2024

Advanced Materials

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Abstract2D layered Bi2WO6 (BWO) is a widely used attractive photocatalyst for degrading VOCs, but the low visible‐light utilization and the easy stacking 2D nanosheets (NSs) limit photocatalysis efficiency and stability. Here, inspired by Eucalyptus, a synergistic strategy of multiscale domain‐confinement and electrostatic force action, based on electrospinning is proposed, for fabricating a heteromorphic BWO photocatalyst. It is found that BWO NSs can grow radially in an orderly spaced arrangement along BWO nanofibers (NFs) during sintering, thereby forming 1D/2D BWO junctions like eucalyptus leaves. This interpenetrating 1D/2D network structure not only solves the easy stacking problem of BWO NSs but also selectively exposes the {010} crystal planes that exhibit efficient hole oxidation. In addition, this peculiar structure enriches electrons at the 1D/2D interface to avoid carrier recombination, thus improving the photocatalytic activity. The photocatalyst material with a reduced bandgap width from 2.56 to 2.49 eV can rapidly degrade 100% of acetaldehyde under visible light without using sacrificial agents and photosensitizers and shows superior stability for eight cycles without any decay. This study provides a feasible method to synthesize an efficient and stable BWO photocatalyst.

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Embedding Reverse Electron Transfer Between Stably Bare Cu Nanoparticles and Cation‐Vacancy CuWO₄

Wang,

Li,

et al. 2024

Advanced Materials

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Cu nanoparticles (NPs) have attracted widespread attention in electronics, energy, and catalysis. However, conventionally synthesized Cu NPs face some challenges such as surface passivation and agglomeration in applications, which impairs their functionalities in the physicochemical properties. Here, the issues above by engineering an embedded interface of stably bare Cu NPs on the cation‐vacancy CuWO4 support is addressed, which induces the strong metal‐support interactions and reverse electron transfer. Various atomic‐scale analyses directly demonstrate the unique electronic structure of the embedded Cu NPs with negative charge and anion oxygen protective layer, which mitigates the typical degradation pathways such as oxidation in ambient air, high‐temperature agglomeration, and CO poisoning adsorption. Kinetics and in situ spectroscopic studies unveil that the embedded electron‐enriched Cu NPs follow the typical Eley‐Rideal mechanism in CO oxidation, contrasting the Langmuir‐Hinshelwood mechanism on the traditional Cu NPs. This mechanistic shift is driven by the Coulombic repulsion in anion oxygen layer, enabling its direct reaction with gaseous CO to form the easily desorbed monodentate carbonate.

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The interplay between selective etching induced cation defects and active oxygen species for volatile organic compounds degradation

Cited by 18 publications

References 31 publications

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Synthesis of Heteromorphic Bi₂WO₆ Films With an Interpenetrate 1D/2D Network Structure for Efficient and Stable Photocatalytic Degradation of VOCs

Embedding Reverse Electron Transfer Between Stably Bare Cu Nanoparticles and Cation‐Vacancy CuWO₄

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The interplay between selective etching induced cation defects and active oxygen species for volatile organic compounds degradation

Cited by 18 publications

References 31 publications

Development of ABO4‐type photoanodes for photoelectrochemical water splitting

Development of ABO4‐type photoanodes for photoelectrochemical water splitting

Synthesis of Heteromorphic Bi2WO6 Films With an Interpenetrate 1D/2D Network Structure for Efficient and Stable Photocatalytic Degradation of VOCs

Embedding Reverse Electron Transfer Between Stably Bare Cu Nanoparticles and Cation‐Vacancy CuWO4

Contact Info

Product

Resources

About

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Development of ABO₄‐type photoanodes for photoelectrochemical water splitting

Synthesis of Heteromorphic Bi₂WO₆ Films With an Interpenetrate 1D/2D Network Structure for Efficient and Stable Photocatalytic Degradation of VOCs

Embedding Reverse Electron Transfer Between Stably Bare Cu Nanoparticles and Cation‐Vacancy CuWO₄