A critical review on graphitic carbon nitride (g-C3N4)-based materials: Preparation, modification and environmental application

Coordination Chemistry Reviews, Journal Year: 2021, Volume and Issue: 453, P. 214338 - 214338

Published: Dec. 4, 2021

Language: Английский

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Surface Modification of 2D Photocatalysts for Solar Energy Conversion

Advanced Materials, Journal Year: 2022, Volume and Issue: 34(23)

Published: March 9, 2022

Abstract 2D materials show many particular properties, such as high surface‐to‐volume ratio, anisotropic degree, and adjustable chemical functionality. These unique properties in have sparked immense interest due to their applications photocatalytic systems, resulting significantly enhanced light capture, charge‐transfer kinetics, surface reaction. Herein, the research progress photocatalysts based on varied compositions functions, followed by specific modification strategies, is introduced. Fundamental principles focusing harvesting, charge separation, molecular adsorption/activation 2D‐material‐based system are systemically explored. The examples described here detail use of various energy‐conversion including water splitting, carbon dioxide reduction, nitrogen fixation, hydrogen peroxide production, organic synthesis. Finally, elaborating challenges possible solutions for developing these materials, review expected provide some inspiration future used efficient energy conversions.

Language: Английский

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Van Der Waals gap-rich BiOCl atomic layers realizing efficient, pure-water CO2-to-CO photocatalysis

Nature Communications, Journal Year: 2021, Volume and Issue: 12(1)

Published: Oct. 11, 2021

Photocatalytic CO2 reduction (PCR) is able to convert solar energy into chemicals, fuels, and feedstocks, but limited by the deficiencies of photocatalysts in steering photon-to-electron conversion activating CO2, especially pure water. Here we report an efficient, water CO2-to-CO photocatalyzed sub-3-nm-thick BiOCl nanosheets with van der Waals gaps (VDWGs) on two-dimensional facets, a graphene-analog motif distinct from majority previously reported usually bearing VDWGs lateral facets. Compared bulk BiOCl, VDWGs-rich atomic layers possess weaker excitonic confinement power decrease exciton binding 137 36 meV, consequently yielding 50-fold enhancement charge separation efficiency. Moreover, facilitate formation VDWG-Bi-VO••-Bi defect, highly active site accelerate transformation via synchronous optimization activation, *COOH splitting, *CO desorption. The improvements both exciton-to-electron conversions result visible light PCR rate 188.2 μmol g−1 h−1 without any co-catalysts, hole scavengers, or organic solvents. These results suggest that increasing VDWG exposure way for designing high-performance solar-fuel generation systems. Efficient photoreduction remains challenging. Here, authors propose use gaps-rich low abundant surface oxygen vacancies CO conversion.

Language: Английский

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Defect engineering of oxide perovskites for catalysis and energy storage: synthesis of chemistry and materials science

Chemical Society Reviews, Journal Year: 2021, Volume and Issue: 50(18), P. 10116 - 10211

Published: Jan. 1, 2021

The present work provides a critical review of the science and technological state-of-the-art defect engineering applied to oxide perovskites in thermocatalytic, electrocatalytic, photocatalytic, energy-storage applications.

Language: Английский

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Room-temperature photosynthesis of propane from CO2 with Cu single atoms on vacancy-rich TiO2

Nature Communications, Journal Year: 2023, Volume and Issue: 14(1)

Published: Feb. 27, 2023

Photochemical conversion of CO2 into high-value C2+ products is difficult to achieve due the energetic and mechanistic challenges in forming multiple C-C bonds. Herein, an efficient photocatalyst for C3H8 prepared by implanting Cu single atoms on Ti0.91O2 atomically-thin layers. promote formation neighbouring oxygen vacancies (VOs) matrix. These modulate electronic coupling interaction between adjacent Ti form a unique Cu-Ti-VO unit A high electron-based selectivity 64.8% (product-based 32.4%), 86.2% total hydrocarbons 50.2%) are achieved. Theoretical calculations suggest that may stabilize key *CHOCO *CH2OCOCO intermediates reduce their energy levels, tuning both C1-C1 C1-C2 couplings thermodynamically-favourable exothermal processes. Tandem catalysis mechanism potential reaction pathway tentatively proposed formation, involving overall (20e- - 20H+) reduction three molecules at room temperature.

Language: Английский

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Electrostatic Attraction-Driven Assembly of a Metal–Organic Framework with a Photosensitizer Boosts Photocatalytic CO₂ Reduction to CO

Journal of the American Chemical Society, Journal Year: 2021, Volume and Issue: 143(42), P. 17424 - 17430

Published: Oct. 12, 2021

Reducing CO2 into fuels via photochemical reactions relies on highly efficient photocatalytic systems. Herein, we report a new and system for reduction. Driven by electrostatic attraction, an anionic metal-organic framework Cu-HHTP (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) as host cationic photosensitizer [Ru(phen)3]2+ (phen 1,10-phenanthroline) guest were self-assembled Ru@Cu-HHTP, which showed high activity reduction under laboratory light source (CO production rate of 130(5) mmol g-1 h-1, selectivity 92.9%) or natural sunlight 69.5 91.3%), representing the remarkable performance. More importantly, in Ru@Cu-HHTP is only about 1/500 quantity reported literature. Theoretical calculations control experiments suggested that assembly catalysts photosensitizers attraction interactions can provide better charge transfer efficiency, resulting performance

Language: Английский

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Generalized Synthetic Strategy for Amorphous Transition Metal Oxides‐Based 2D Heterojunctions with Superb Photocatalytic Hydrogen and Oxygen Evolution

Advanced Functional Materials, Journal Year: 2020, Volume and Issue: 31(11)

Published: Dec. 27, 2020

Abstract 2D amorphous transition metal oxides (a‐TMOs) heterojunctions that have the synergistic effects of interface (efficiently promoting separation electron−hole pairs) and nature (abundant defects dangling bonds) attracted substantial interest as compelling photocatalysts for solar energy conversion. Strategies to facilely construct a‐TMOs‐based 2D/2D is still a big challenge due difficulty preparing individual counterparts. A generalized synthesis strategy based on supramolecular self‐assembly bottom–up growth reported, by taking g‐C 3 N 4 (CN)/a‐TMOs heterojunction proof‐of‐concept. This primarily depends controlling cooperation precursor coordinated covalent bonds arising from tendency ions attain stable configuration electrons, which independent intrinsic character ion, indicating it universally applicable. As demonstration, structure, physical properties, photocatalytic water‐splitting performance CN/a‐ZnO are systematically studied. The optimized exhibits enhanced performance, hydrogen (432.6 µmol h −1 g ) oxygen (532.4 evolution rate 15.5 12.2 times than bulk CN, respectively. synthetic useful a‐TMOs nanomaterials applications in energy‐related areas beyond.

Language: Английский

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Recent advances in BiOBr-based photocatalysts for environmental remediation

Chinese Chemical Letters, Journal Year: 2021, Volume and Issue: 32(11), P. 3265 - 3276

Published: April 2, 2021

Language: Английский

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Interfacial chemical bond modulated Bi19S27Br3/g-C3N4 Z-scheme heterojunction for enhanced photocatalytic CO2 conversion

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 307, P. 121162 - 121162

Published: Feb. 2, 2022

Language: Английский

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Unveiling the activity origin of ultrathin BiOCl nanosheets for photocatalytic CO2 reduction

Applied Catalysis B Environment and Energy, Journal Year: 2021, Volume and Issue: 299, P. 120679 - 120679

Published: Sept. 1, 2021

Language: Английский

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