Journal ArticleDOI
Oxygen vacancy-rich 2D/2D BiOCl-g-C3N4 ultrathin heterostructure nanosheets for enhanced visible-light-driven photocatalytic activity in environmental remediation
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TLDR
In this paper, a novel oxygen vacancy-rich two-dimensional/two-dimensional (2D/2D) BiOCl-g-C3N4 ultrathin heterostructure nanosheet (CN-BC) was successfully prepared by a facile solvothermal method for degradation of non-dye organic contaminants.Abstract:
Photocatalytic degradation has been unearthed as a promising strategy for environmental remediation, and the calling is endless for more efficient photocatalytic system. In this study, a novel oxygen vacancy-rich two-dimensional/two-dimensional (2D/2D) BiOCl-g-C3N4 ultrathin heterostructure nanosheet (CN-BC) is successfully prepared by a facile solvothermal method for degradation of non-dye organic contaminants. HRTEM observes the formation of heterojunction, while ESR and XPS unveil the distinct oxygen vacancy concentrations. Density functional calculations reveal that the introduction of oxygen vacancies (OVs) brings a new defect level, resulting in the increased photoabsorption. Under visible light irradiation, the OVs-rich optimum ratio of CN-BC (50CN-50BC) Exhibits 95% removal efficiency of 4-chlorophenol within 2 h, which is about 12.5, 5.3 and 3.4 times as that of pure BiOCl, g-C3N4 and OVs-poor heterostructure, respectively. The photocatalytic mechanism of OVs-rich 50CN-50BC is also revealed, suggesting that the synergistic effect between 2D/2D heterojunction and oxygen vacancies greatly promotes visible-light photoabsorption and photoinduced carrier separation efficiency with a prolonged lifetime, which is confirmed by multiple optical and electrochemical analyses, including DRS, steady-state photoluminescence spectra, electrochemical impedance spectroscopy, photocurrent response and time-resolved fluorescence spectra. This study could bring new opportunities for the rational design of highly efficient photocatalysts by combining 2D/2D heterojunctions with oxygen vacancies in environmental remediation.read more
Citations
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Journal ArticleDOI
Novel hierarchical carbon quantum dots-decorated BiOCl nanosheet/carbonized eggshell membrane composites for improved removal of organic contaminants from water via synergistic adsorption and photocatalysis
Qin Zhou,Weiya Huang,Weiya Huang,Chong Xu,Xin Liu,Kai Yang,Dan Li,Yang Hou,Yang Hou,Dionysios D. Dionysiou +9 more
TL;DR: In this paper, a series of carbon quantum dots (CQDs)-decorated BiOCl/carbonized eggshell membrane (CEM) composites were synthesized with CEMs as bio-templates.
Journal ArticleDOI
Novel g-C3N4/BiOClxI1-x nanosheets with rich oxygen vacancies for enhanced photocatalytic degradation of organic contaminants under visible and simulated solar light
TL;DR: In this paper, a novel oxygen vacancy-rich g-C3N4/BiOClxI1-x heterostructure nanosheet (BCI-CN-P) was successfully prepared by a facile coprecipitation method with the assistance of surfactant polyvinylpyrrolidone (PVP) for enhanced photocatalytic degradation of organic contaminants.
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Amorphous Nickel–Iron Borophosphate for a Robust and Efficient Oxygen Evolution Reaction
Jiseok Kwon,HyukSu Han,Seonghan Jo,Seunggun Choi,Kyung Yoon Chung,Kyung Yoon Chung,Ghulam Ali,Keemin Park,Ungyu Paik,Taeseup Song +9 more
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Interfacial Oxygen Vacancy Engineered Two-Dimensional g-C3N4/BiOCl Heterostructures with Boosted Photocatalytic Conversion of CO2
TL;DR: The CO2 conversion by photocatalysis has been a focus of global concern as yet and the exploring of efficient heterostructures is critical to promote the photocatalytic performance as discussed by the authors.
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The construction of type II heterojunction of Bi2WO6/BiOBr photocatalyst with improved photocatalytic performance
TL;DR: The Bi2WO6/BiOBr composites were synthesized via a simple one-step solvothermal method by using reactable ionic liquid of [C16mim]Br as Br source as discussed by the authors.
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