Synergistically boosting of CO2 photoreduction over Bi/BiOBr nanostructure via in-situ formation of oxygen vacancy and metallic Bi

Article Engineering, Chemical

Novel 2D/2D BiOBr/Zn(OH)2 photocatalysts for efficient photoreduction CO2

Wenzhen Qin et al.

Summary: In order to enhance the photocatalytic performance of BiOBr, 2D Zn(OH)2 nanosheets were introduced on 2D BiOBr nanosheets to construct a 2D heterostructure in BiOBr/Zn(OH)2 composites by direct precipitation polymerization.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

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Review Chemistry, Multidisciplinary

Research progress on the formation, detection methods and application in photocatalytic reduction of CO2 of oxygen vacancy

Yuanyuan Sun et al.

Summary: Photocatalytic reduction of CO2 to valuable carbon products is an attractive method for energy regeneration and reducing carbon dioxide emissions. Oxygen vacancy engineering is a promising strategy to promote the activation and adsorption of CO2 by improving carrier diffusion efficiency and enriching electrons. This review discusses the principle, creation methods, detection means, and mechanisms of oxygen vacancy in improving photocatalytic CO2 reduction, and provides prospects for its future development.

JOURNAL OF CO2 UTILIZATION (2023)

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Article Engineering, Environmental

Restructuring surface frustrated Lewis acid-base pairs of BiOBr through isomorphous Sn doping for boosting photocatalytic CO2 reduction

Jie Hao et al.

Summary: Isomorphically Sn (IV) doped BiOBr is achieved through a facile chemical method, enhancing the photocatalytic CO2 reduction into CO. The 4Sn-BiOBr sample shows the best activity with a 7.8 times higher CO yield compared to pristine BiOBr, due to the introduction of Sn ions and oxygen vacancies into the crystal lattice of BiOBr. This work provides insights into the tunability of catalytic active sites at the atom-scale and the mechanism of photocatalytic CO2 reduction.

CHEMICAL ENGINEERING JOURNAL (2023)

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Article Engineering, Chemical

Development of direct Z-schemes 2D/2D Bi2O2CO3/SrTiO3 photocatalyst with interfacial interaction for photocatalytic CO2 reduction

Zhaoling Li et al.

Summary: In this study, a two-dimensional/two-dimensional (2D/2D) Bi2O2CO3/SrTiO3 (BOC/STO) direct Z-schemes hetero-junction photocatalyst is prepared for efficient CO2 reduction. The perfect lattice matching between BOC and STO in the BOC/STO heterostructure provides an ideal channel for charge transport. Additionally, the direct Z-schemes heterojunction formed at the BOC/STO interface facilitates efficient migration and separation of photogenerated carriers. The optimized BOC/STO catalyst shows significantly enhanced photocatalytic reduction of CO2 to CO and CH4, with higher selectivity for CH4 compared to pure BOC or STO.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

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Article Engineering, Chemical

Tunable Bi-bridge S-scheme Bi2S3/BiOBr heterojunction with oxygen vacancy and SPR effect for efficient photocatalytic reduction of Cr(VI) and industrial electroplating wastewater treatment

Ren He et al.

Summary: The Bi2S3/BiOBr heterojunction with oxygen vacancies and surface plasmon resonance (SPR) effect of Bi metal was synthesized and used for Cr(VI) reduction. The 3:10 Bi2S3/Bi/BiOBr exhibited superior visible-light photocatalytic reduction performance with 95.82% Cr(VI) removal efficiency. It also showed high stability and good anti-interference ability, making it potentially attractive for real wastewater treatment.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

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Article Engineering, Chemical

Construction of Bi2O3 quantum Dots/SrBi4Ti4O15 S-scheme heterojunction with enhanced photocatalytic CO2 reduction: Role of Bi2O3 quantum dots and mechanism study

Sijia She et al.

Summary: In this study, a Bi2O3 quantum dots/SrBi4Ti4O15 heterojunction was successfully synthesized, which significantly improved the photocatalytic performance by optimizing electron diffusion and enhancing the separation of electron-hole pairs. The composite showed excellent ability in generating CO and CH4, and even under air atmosphere, it exhibited superior photocatalytic CO2 reduction ability.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

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Article Engineering, Chemical

Fabricate dual interface build-in electric fields by introducing Au nanospecies into Z-scheme heterojunction to propel photocatalytic CO2 reduction

Bo Hu et al.

Summary: A Z-scheme Co3O4/Au/PCN heterojunction is fabricated by introducing Au nanospecies between Co3O4 and PCN, which creates dual interface build-in electric fields. The heterojunction exhibits outstanding activity, stability, and reusability in photocatalytic CO2 reduction, with significantly improved carrier separation efficiency.

SEPARATION AND PURIFICATION TECHNOLOGY (2023)

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Article Chemistry, Physical

In situ construction of S-scheme AgBr/BiOBr heterojunction with surface oxygen vacancy for boosting photocatalytic CO2 reduction with H2O

Zerui Miao et al.

Summary: In this study, an AgBr/BiOBr heterojunction with surface oxygen vacancies was synthesized using a simple chemical method, which showed significantly improved photoreduction rates of CO2 compared to pure BiOBr. The unique S-scheme band structure and oxygen vacancies were found to enhance the utilization of sunlight and increase the separation and transfer of photogenerated charge carriers, leading to efficient photocatalytic reduction of CO2.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Engineering, Electrical & Electronic

Preparation of flower-like BiOBr/Bi2WO6 Z-scheme heterojunction through an ion exchange process with enhanced photocatalytic activity

Yulin Liu et al.

Summary: The flower-like BiOBr/Bi2WO6 Z-scheme heterojunction prepared by ion exchange process showed significantly enhanced photocatalytic performance in degradation of Rhodamine B, tetracycline hydrochloride, and potassium dichromate. The formation of BiOBr/Bi2WO6 heterojunction broadened the visible light absorption range and inhibited charge carrier recombination. The mechanism of enhanced photocatalytic performance with the BiOBr/Bi2WO6 heterojunction was proposed.

MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING (2022)

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Article Multidisciplinary Sciences

Unveiling the charge transfer dynamics steered by built-in electric fields in BiOBr photocatalysts

Zhishan Luo et al.

Summary: This study investigates the impact of internal electric fields on charge transfer dynamics and identifies carrier drift distances as a critical parameter. By analyzing electron microscopy data, the authors propose a Gaussian distribution model to measure the diffusion length and drift distance of electrons. The research finds that the charge separation efficiency and photocatalytic performance are maximized when the particle size is approximately twice the drift distance.

NATURE COMMUNICATIONS (2022)

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Article Chemistry, Physical

Photocatalytic Reduction of CO2with H2O Mediated by Ce-TailoredBismuth Oxybromide Surface Frustrated Lewis Pairs

Qingli Wang et al.

Summary: Surface frustrated Lewis pairs (FLP) in bismuth oxybromide (BiOBr) are effective catalytic sites for photocatalytic reduction of CO2. The introduction of Ce4+ and oxygen vacancy enhances the catalytic properties. This study provides insights into the construction of efficient photocatalysts and the understanding of the photocatalytic mechanism at the atomic level.

ACS CATALYSIS (2022)

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Article Chemistry, Physical

Oxygen vacancy and Van der Waals heterojunction modulated interfacial chemical bond over Mo2C/Bi4O5Br2 for boosting photocatalytic CO2 reduction

Haiyan Peng et al.

Summary: This study synthesized a Van der Waals heterojunction of Mo2C/Bi4O5Br2 composite with oxygen vacancies, which modulated the surface electronic structure through compact heterojunction and unsaturated oxygen vacancy induced interfacial bonds. The electron transfer channel of the Mo-O bond significantly enhanced the dissociation of excitons and charge transfer, leading to excellent CO2 reduction performance and stability.

APPLIED CATALYSIS B-ENVIRONMENTAL (2022)

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Article Multidisciplinary Sciences

Encapsulated CdSe/CdS nanorods in double-shelled porous nanocomposites for efficient photocatalytic CO2 reduction

Hui Li et al.

Summary: The study demonstrates the preparation of hierarchical porous nano composites using synchronized reaction and self-assembly, showing higher activity in CO2 photocatalytic conversion. This provides a rational strategy to optimize CO2 adsorption and conversion.

NATURE COMMUNICATIONS (2022)

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Article Chemistry, Physical

Polyvinyl pyrrolidone-coordinated ultrathin bismuth oxybromide nanosheets for boosting photoreduction of carbon dioxide via ligand-to-metal charge transfer

Qingli Wang et al.

Summary: By loading PVP onto BiOBr, the photoreduction efficiency of CO2 can be greatly enhanced, leading to higher yields of CO and CH4 and improved selectivity for CO. The coordination of PVP can induce and stabilize oxygen vacancies, increase the charge density of BiOBr, and facilitate the adsorption and activation of CO2 molecules.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2022)

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Article Energy & Fuels

Oxygen Vacancies Engineering-Mediated BiOBr Atomic Layers for Boosting Visible Light-Driven Photocatalytic CO2 Reduction

Lin Wang et al.

Summary: The introduction of oxygen vacancies into BiOBr atomic layers enhances the efficiency of carrier separation, CO2 adsorption-activation performance, and CO2 reduction activity, offering a promising approach for designing high-performance CO2 reduction photocatalysts.

SOLAR RRL (2021)

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Article Chemistry, Physical

Synergistically boosting highly selective CO2-to-CO photoreduction over BiOCl nanosheets via in-situ formation of surface defects and non-precious metal nanoparticles

Siwen Gong et al.

Summary: A hollow hierarchical BiOCl with highly exposed nanosheets was synthesized using a gas-bubble-template strategy, followed by in-situ introduction of oxygen vacancies and metallic bismuth nanoparticles through thermal treatment in N2. The Bi0/OVs-BOCs showed high selectivity and increased yield in CO2 photoreduction tests, with nearly four times higher efficiency compared to the original BOC. The synergistic effect of in-situ formed OVs and metal nanoparticles was found to significantly enhance the photocatalytic activity and selectivity of solar energy materials.

APPLIED CATALYSIS B-ENVIRONMENTAL (2021)

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Article Nanoscience & Nanotechnology

Multichannel Electron Transmission and Fluorescence Resonance Energy Transfer in In2S3/Au/rGO Composite for CO2 Photoreduction

Xin Li et al.

Summary: Efficient electron transmission is crucial in the process of CO2 photoreduction. A multi-interface-contacted In2S3/Au/reduced graphene oxide (rGO) photocatalyst with the fluorescence resonance energy transfer (FRET) mechanism was successfully prepared, showing excellent photoreduction performance. Photoelectrochemical analysis indicated improved carrier transmission efficiency within the catalyst.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Chemistry, Multidisciplinary

Schottky Junctions with Bi Cocatalyst for Taming Aqueous Phase N2 Reduction toward Enhanced Solar Ammonia Production

Yewei Huang et al.

Summary: The research discusses the use of Bi as a robust cocatalyst for constructing Schottky-junction photocatalysts for N-2 reduction to ammonia, resulting in significantly boosted conversion efficiency. This approach not only facilitates interfacial electron transfer and N-2 activation but also shows potential for application in other semiconductor systems for enhancing photocatalytic ammonia production.

ADVANCED SCIENCE (2021)

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Article Multidisciplinary Sciences

Charge-transfer regulated visible light driven photocatalytic H2 production and CO2 reduction in tetrathiafulvalene based coordination polymer gel

Parul Verma et al.

Summary: This study developed a metal-organic hybrid material that efficiently converts solar energy to hydrogen and reduces CO2 to CO and CH4 through photocatalysis. The material exhibits high catalytic activity regulated by charge-transfer interactions.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Enhancing Charge Transfer in Photocatalytic Hydrogen Production over Dye-Sensitized Pt/TiO2 by Ionic Liquid Coating

Elif Can et al.

Summary: Photocatalytic hydrogen production is considered as a cost-efficient method to produce hydrogen fuel with minimal environmental impact. In this study, a photocatalyst system composed of Pt/TiO2 and dye-sensitized Pt/TiO2 particulates encapsulated by an ionic liquid is proposed, which significantly enhances the efficiency of hydrogen production. Various analyses showed that the ionic liquid coating improves charge transfer and prevents recombination of electron-hole pairs, leading to increased hydrogen production rates.

ACS APPLIED ENERGY MATERIALS (2021)

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Article Energy & Fuels

Nitrogen Vacancy-Induced Deposition of Pd Nanoparticles onto g-C3N4 with Greatly Improved Photocatalytic Activity in H2 Evolution

Yuan Yao et al.

Summary: C3N4 shows excellent photocatalytic water splitting performance, with the improvement attributed to the introduction of nitrogen vacancies (NVs) and Pd nanoparticles (NPs). The formation of NVs enhances the Fermi level and optimizes the band structure, while Pd NPs absorb more visible-light photons and act as carriers for suppressing recombination. This enhancement mechanism is explored in detail and comprehensively discussed in the study.

SOLAR RRL (2021)

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Article Chemistry, Physical

One-step in-situ synthesis of Bi-decorated BiOBr microspheres with abundant oxygen vacancies for enhanced photocatalytic nitrogen fixation properties

Meng Lan et al.

Summary: Bi-decorated BiOBr microspheres with oxygen vacancies were fabricated using a solvothermal strategy, serving as effective photocatalysts for nitrogen fixation. The hetero-structured microspheres exhibited superior visible-light utilization and effective separation of photoexcited charge carriers, resulting in significantly enhanced N-2 fixation performance compared to pure BiOBr. This study offers a simple and energy-efficient method for stable photocatalytic N-2 fixation.

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS (2021)

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Article Engineering, Chemical

Photocatalytic Production of Methyl Formate by Methanol Self-Coupling: From Oxidative Dehydrogenation to Direct Dehydrogenation

Bin Wang et al.

Summary: The study compared the production rates of methyl formate (MF) by methanol direct dehydrogenation and oxidative dehydrogenation under a CO2 atmosphere, as well as the products in liquid and gaseous phases under different atmospheres. A new mechanism of MF generation from methanol dehydrogenation was proposed, and it was shown that intermediates derived from CO2 reduction can increase the rate of MF production.

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH (2021)

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Article Chemistry, Physical