Worm-like porous and defect-structured cadmium stannate photoanodes for enhanced solar water oxidation

Pan, Peng; Wang, Ping; Cai, Zhengyang; Zhang, Jiajia; Hu, Yueyang; Xu, Jingcheng; Wang, Ding

doi:10.1039/d1na00828e

Cited by 4 publications

(1 citation statement)

References 37 publications

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“…On the other hand, some works mentioned that O V could significantly reinforce molecular adsorption for promoting the surface reaction rate . In bulk, it makes a contribution on free carriers to enhance bulk conductivity and largely extends charge-carrier lifetimes in the way of selective trapping process. − These can be considered as the positive effects from O V . Thereout, it is not hard to understand that the versatile roles of O V have strong relation to the spatial location in metal oxides.…”

Section: Introductionmentioning

confidence: 99%

Engineering Charge Separation in α-Ga₂O₃ Nanorod Arrays for Photoelectrochemical UV Detection

Xu,

Gao,

Tong

et al. 2024

ACS Appl. Nano Mater.

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Oxygen vacancy (O V ) states are the most prevalent chemical defects in metal oxides without extrinsic dopants, which govern the regime of photoelectrochemical (PEC) kinetics. So far, although tremendous strategies are developed to overcome the negative effects from O V , the threshold at which O V plays a positive role has not been specifically studied. Furthermore, the kinetics of stoichiometry changes as well as their effects on the charge transport aroused from manipulating O V distribution are still in confusion. Here, taking α-Ga 2 O 3 nanorod arrays as the model, we show the evolution mechanism about the changes in O V distribution during vacancy engineering. Since the O diffusion flow into bulk is regulated by the surface O V -assisted migration mechanism, the surface O V concentration decreased first and recovered slightly after a period of time. This is deviated from the common sense that the longtime O 2 annealing should bring about monotonical O V decrease at the surface. After PEC characterization and theory calculation, the results show that O V plays to the score in the PEC process, depending on its own spatial distribution. The optimized engineering strategy of O V spatial distribution is proposed to establish the efficient carrier separation nanoarchitectures for high-performance UV photodetection. This work provides an insight for clarifying fundamental rules for defect engineering in the PEC field.

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Section: Introductionmentioning

confidence: 99%

Engineering Charge Separation in α-Ga₂O₃ Nanorod Arrays for Photoelectrochemical UV Detection

Xu,

Gao,

Tong

et al. 2024

ACS Appl. Nano Mater.

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Self-assembled nanorods with reduced graphene oxide as efficient nano-catalyst for dual modality sensing of hazardous phenolic compound

2022

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Highly-efficient removal of Rhodamine B using a flow-through electrocatalytic filtration system: Characteristics, efficiency and mechanism

Hu,

Zhu,

Lin

et al. 2023

Journal of Electroanalytical Chemistry

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Worm-like porous and defect-structured cadmium stannate photoanodes for enhanced solar water oxidation

Abstract: The work aims to elucidate the importance of hybrid microwave annealing technology (HMA) on ultrafast fabrication of deficient cadmium stannate (Cd2SnO4) photoanodes with worm-like porous structure and significant enhancement of...

Cited by 4 publications

References 37 publications

Engineering Charge Separation in α-Ga₂O₃ Nanorod Arrays for Photoelectrochemical UV Detection

Engineering Charge Separation in α-Ga₂O₃ Nanorod Arrays for Photoelectrochemical UV Detection

Self-assembled nanorods with reduced graphene oxide as efficient nano-catalyst for dual modality sensing of hazardous phenolic compound

Highly-efficient removal of Rhodamine B using a flow-through electrocatalytic filtration system: Characteristics, efficiency and mechanism

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Worm-like porous and defect-structured cadmium stannate photoanodes for enhanced solar water oxidation

Abstract: The work aims to elucidate the importance of hybrid microwave annealing technology (HMA) on ultrafast fabrication of deficient cadmium stannate (Cd2SnO4) photoanodes with worm-like porous structure and significant enhancement of...

Cited by 4 publications

References 37 publications

Engineering Charge Separation in α-Ga2O3 Nanorod Arrays for Photoelectrochemical UV Detection

Engineering Charge Separation in α-Ga2O3 Nanorod Arrays for Photoelectrochemical UV Detection

Self-assembled nanorods with reduced graphene oxide as efficient nano-catalyst for dual modality sensing of hazardous phenolic compound

Highly-efficient removal of Rhodamine B using a flow-through electrocatalytic filtration system: Characteristics, efficiency and mechanism

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Product

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Engineering Charge Separation in α-Ga₂O₃ Nanorod Arrays for Photoelectrochemical UV Detection

Engineering Charge Separation in α-Ga₂O₃ Nanorod Arrays for Photoelectrochemical UV Detection