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
Functionalized Hybridization of 2D Nanomaterials.
Guijian Guan,Ming-Yong Han +1 more
TL;DR: As the most intensely investigated 2D materials in the post‐graphene era, transition metal dichalcogenide nanosheets are comprehensively investigated through their element doping, physical/chemical functionalization, and nanohybridization.
Journal ArticleDOI
In situ surfactant-free synthesis of ultrathin BiOCl/g-C3N4 nanosheets for enhanced visible-light photodegradation of rhodamine B
TL;DR: In this article, in situ surfactant-free synthesis of ultrathin BiOCl/g-C3N4 (BOC/CN) nanosheets for enhanced visible-light photodegradation of rhodamine B was described.
Journal ArticleDOI
Synergistic interaction of Z-scheme 2D/3D g-C3N4/BiOI heterojunction and porous PVDF membrane for greatly improving the photodegradation efficiency of tetracycline.
TL;DR: Hydroxyl radical detection and ESR analysis identified that the β-phase PVDF membrane could promote photoinduced carrier separation efficiency of 2D/3D g-C3N4/BiOI heterojunction and may open up a novel strategy for designing and constructing high-efficient photocatalytic membranes for water treatment.
Journal ArticleDOI
2D/2D heterostructured photocatalyst: Rational design for energy and environmental applications
TL;DR: In this article, a comprehensive review of the recent progress on the fundamental aspects, general synthesis strategies (in situ growth and ex situ assembly) of 2D/2D heterostructured photocatalysts and highlight their applications in the fields of hydrogen evolution, CO2 reduction and removal of pollutants are also presented.
Journal ArticleDOI
Oxygen vacancy-rich MoO3−x nanobelts for photocatalytic N2 reduction to NH3 in pure water
TL;DR: In this paper, MoO3−x nanobelts are synthesized by a hydrothermal method, and they are firstly utilized as photocatalysts for N2 fixation without using sacrificial reagents and precious-metal co-catalysts at room temperature and atmospheric pressure.
References
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