Oxygen vacancy and Z-scheme heterojunction cooperate to promote visible light nitrogen photofixation

Kong, Xiaowen; Chang, Kanglu; Tao, Xumei; Huang, Liang

doi:10.1016/j.cej.2023.146159

Cited by 17 publications

(2 citation statements)

References 54 publications

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“…67,68 The Vo also acts as an electron capture center, offering unique sites for electron transfer and reducing electron transfer resistance, which promotes the weakening of NN bonds. 38,69 The proposed mechanism of photocatalytic N 2 fixation in TiCeOS is shown in Fig. 6.…”

Section: Resultsmentioning

confidence: 99%

Photocatalytic fixation of nitrogen to ammonia with a Ce/S co-doped TiO₂ catalyst: synergistic tuning of heterovalent metal states and oxygen vacancy defects

Zhang,

Chen,

Kuo

et al. 2024

J. Mater. Chem. A

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Section: Resultsmentioning

confidence: 99%

Photocatalytic fixation of nitrogen to ammonia with a Ce/S co-doped TiO₂ catalyst: synergistic tuning of heterovalent metal states and oxygen vacancy defects

Zhang,

Chen,

Kuo

et al. 2024

J. Mater. Chem. A

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“…Among them, oxygen vacancy (Ov) is the most widely used defect engineering strategy for CeO 2 . For instance, Tao et al [120] have synthesized z-type heterojunctions of oxygenvacancy engineered Fe 2 O 3 /CeO 2 using Ce-MOFs as precursors, through heat treatment (Figure 9a). On account of the synergistic effect of oxygen vacancy and Z-type heterojunction, charge pair recombination is remarkably inhibited and direct electron transfer is induced, ultimately promoting better N 2 adsorption and activation.…”

Section: Nitrogen Fixationmentioning

confidence: 99%

Recent Advances of CeO₂‐Based Composite Materials for Photocatalytic Applications

Yan,

Wu,

et al. 2024

ChemSusChem

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Photocatalysis has the advantages of practical, sustainable and environmental protection, so it plays a significant role in energy transformation and environmental utilization. CeO2 has attracted widespread attention for its unique 4f electrons, rich defect structures, high oxygen storage capacity and great chemical stability. In this paper, we review the structure of CeO2 and the common methods for the preparation of CeO2‐based composites in the first part. In particular, we highlight the co‐precipitation method, template method, and sol‐gel method methods. Then, in the second part, we introduce the application of CeO2‐based composites in photocatalysis, including photocatalytic CO2 reduction, hydrogen production, degradation, selective reaction, and photocatalytic nitrogen fixation. In addition, we discuss several modification techniques to improve the photocatalytic performance of CeO2‐based composites, such as elemental doping, defect engineering, constructing heterojunction and morphology regulation. Finally, the challenges faced by CeO2‐based composites are analyzed and their development prospects are prospected. This review provides a systematic summary of the recent advance of CeO2‐based composites in the field of photocatalysis, which can provide useful references for the rational design of efficient CeO2‐based composite photocatalysts for sustainable development.

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Surface Optimization of Noble‐Metal‐Free Conductive [Mn_1/4Co_1/2Ni_1/4]O₂ Nanosheets for Boosting Their Efficacy as Hybridization Matrices

Kwon,

Kim,

et al. 2024

Advanced Science

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Conductive 2D nanosheets have evoked tremendous scientific efforts because of their high efficiency as hybridization matrices for improving diverse functionalities of nanostructured materials. To address the problems posed by previously reported conductive nanosheets like poorly‐interacting graphene and cost‐ineffective RuO2 nanosheets, economically feasible noble‐metal‐free conductive [MnxCo1−2xNix]O2 oxide nanosheets are synthesized with outstanding interfacial interaction capability. The surface‐optimized [Mn1/4Co1/2Ni1/4]O2 nanosheets outperformed RuO2/graphene nanosheets as hybridization matrices in exploring high‐performance visible‐light‐active (λ >420 nm) photocatalysts. The most efficient g‐C3N4–[Mn1/4Co1/2Ni1/4]O2 nanohybrid exhibited unusually high photocatalytic activity (NH4+ formation rate: 1.2 mmol g−1 h−1), i.e., one of the highest N2 reduction efficiencies. The outstanding hybridization effect of the defective [Mn1/4Co1/2Ni1/4]O2 nanosheets is attributed to the optimization of surface bonding character and electronic structure, allowing for improved interfacial coordination bonding with g‐C3N4 at the defect sites. Results from spectroscopic measurements and theoretical calculations reveal that hybridization helps optimize the bandgap energy, and improves charge separation, N2 adsorptivity, and surface reactivity. The universality of the [Mn1/4Co1/2Ni1/4]O2 nanosheet as versatile hybridization matrices is corroborated by the improvement in the electrocatalytic activity of hybridized Co−Fe‐LDH as well as the photocatalytic hydrogen production ability of hybridized CdS.

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Oxygen vacancy and Z-scheme heterojunction cooperate to promote visible light nitrogen photofixation

Cited by 17 publications

References 54 publications

Photocatalytic fixation of nitrogen to ammonia with a Ce/S co-doped TiO₂ catalyst: synergistic tuning of heterovalent metal states and oxygen vacancy defects

Photocatalytic fixation of nitrogen to ammonia with a Ce/S co-doped TiO₂ catalyst: synergistic tuning of heterovalent metal states and oxygen vacancy defects

Recent Advances of CeO₂‐Based Composite Materials for Photocatalytic Applications

Surface Optimization of Noble‐Metal‐Free Conductive [Mn_1/4Co_1/2Ni_1/4]O₂ Nanosheets for Boosting Their Efficacy as Hybridization Matrices

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Oxygen vacancy and Z-scheme heterojunction cooperate to promote visible light nitrogen photofixation

Cited by 17 publications

References 54 publications

Photocatalytic fixation of nitrogen to ammonia with a Ce/S co-doped TiO2 catalyst: synergistic tuning of heterovalent metal states and oxygen vacancy defects

Photocatalytic fixation of nitrogen to ammonia with a Ce/S co-doped TiO2 catalyst: synergistic tuning of heterovalent metal states and oxygen vacancy defects

Recent Advances of CeO2‐Based Composite Materials for Photocatalytic Applications

Surface Optimization of Noble‐Metal‐Free Conductive [Mn1/4Co1/2Ni1/4]O2 Nanosheets for Boosting Their Efficacy as Hybridization Matrices

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Product

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Photocatalytic fixation of nitrogen to ammonia with a Ce/S co-doped TiO₂ catalyst: synergistic tuning of heterovalent metal states and oxygen vacancy defects

Photocatalytic fixation of nitrogen to ammonia with a Ce/S co-doped TiO₂ catalyst: synergistic tuning of heterovalent metal states and oxygen vacancy defects

Recent Advances of CeO₂‐Based Composite Materials for Photocatalytic Applications

Surface Optimization of Noble‐Metal‐Free Conductive [Mn_1/4Co_1/2Ni_1/4]O₂ Nanosheets for Boosting Their Efficacy as Hybridization Matrices