Synthesis and modification strategies of g-C3N4 nanosheets for photocatalytic applications

Advanced Powder Materials, Journal Year: 2023, Volume and Issue: 3(1), P. 100150 - 100150

Published: July 5, 2023

Graphitic carbon nitride nanosheets (CNNs) become the most promising member in family benefitted from their two-dimensional structural features. Recently, great endeavors have been made synthesis and modification of CNNs to improve photocatalytic properties, many exciting progresses gained. In order elucidate fundamentals based catalysts provide insights into rational design photocatalysis system, we describe recent progress preparation strategies applications this review. Firstly, physicochemical properties are briefly introduced. Secondly, approaches reviewed, including top-down stripping (thermal, gas, liquid, composite stripping) bottom-up precursor molecules (solvothermal, template, supramolecular self-assembly method). Subsequently, on years discussed, crystal structure design, doping, surface functionalization, constructing 2D heterojunction, anchoring single-atom. Then multifunctional g-C3N4 nanosheet materials H2 evolution, O2 overall water splitting, H2O2 production, CO2 reduction, N2 fixation, pollutant removal, organic synthesis, sensing highlighted. Finally, opportunities challenges for development high-performance systems also promising.

Language: Английский

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Improving CO2 photoconversion with ionic liquid and Co single atoms

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

Published: March 16, 2023

Photocatalytic CO2 conversion promises an ideal route to store solar energy into chemical bonds. However, sluggish electron kinetics and unfavorable product selectivity remain unresolved challenges. Here, ionic liquid, 1-ethyl-3-methylimidazolium tetrafluoroborate, borate-anchored Co single atoms were separately loaded on ultrathin g-C3N4 nanosheets. The optimized nanocomposite photocatalyst produces CO CH4 from water under UV-vis light irradiation, exhibiting a 42-fold photoactivity enhancement compared with nearly 100% towards reduction. Experimental theoretical results reveal that the liquid extracts electrons facilitates reduction, whereas trap holes catalyze oxidation. More importantly, maximum transfer efficiency for photoreduction, as measured in-situ μs-transient absorption spectroscopy, is found be 35.3%, owing combined effect of atoms. This work offers feasible strategy efficiently converting valuable chemicals.

Language: Английский

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The strong interaction and confinement effect of Ag@NH2-MIL-88B for improving the conversion and durability of photocatalytic Cr(VI) reduction in the presence of a hole scavenger

Journal of Hazardous Materials, Journal Year: 2023, Volume and Issue: 451, P. 131149 - 131149

Published: March 7, 2023

Language: Английский

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The coupling of persulfate activation and membrane separation for the effective pollutant degradation and membrane fouling alleviation

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 451, P. 139009 - 139009

Published: Sept. 5, 2022

Language: Английский

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Insight into boron-doped biochar as efficient metal-free catalyst for peroxymonosulfate activation: Important role of -O-B-O- moieties

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 445, P. 130479 - 130479

Published: Nov. 25, 2022

Language: Английский

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Single-atom Nb anchored on graphitic carbon nitride for boosting electron transfer towards improved photocatalytic performance

Applied Catalysis B Environment and Energy, Journal Year: 2023, Volume and Issue: 328, P. 122495 - 122495

Published: Feb. 20, 2023

Language: Английский

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Intramolecular D-A structure and n-π* transition co-promoted photodegradation activity of carbon nitride: Performance, mechanism and toxicity insight

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 456, P. 141029 - 141029

Published: Dec. 17, 2022

Language: Английский

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Engineering g-C3N4 based materials for advanced photocatalysis: Recent advances

Green Energy & Environment, Journal Year: 2022, Volume and Issue: 9(2), P. 166 - 197

Published: Dec. 13, 2022

Photocatalysis driven by abundant yet intermittent solar energy has considerable potential in renewable generation and environmental remediation. The outstanding electronic structure physicochemical properties of graphitic carbon nitride (g-C3N4), together with unique metal-free characteristic, make them ideal candidates for advanced photocatalysts construction. This review summarizes the up-to-date advances on g-C3N4 based from ingenious-design strategies diversified photocatalytic applications. Notably, advantages, fabrication methods limitations each design strategy are systemically analyzed. In order to deeply comprehend inner connection theory–structure–performance upon photocatalysts, structure/composition designs, corresponding activities reaction mechanisms jointly discussed, associated introducing their applications toward water splitting, dioxide/nitrogen reduction pollutants degradation, etc. Finally, current challenges future perspectives materials photocatalysis briefly proposed. These also instructive constructing other environment-related

Language: Английский

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Spatial Decoupling of Redox Chemistry for Efficient and Highly Selective Amine Photoconversion to Imines

Journal of the American Chemical Society, Journal Year: 2023, Volume and Issue: 145(13), P. 7181 - 7189

Published: March 24, 2023

Light-driven primary amine oxidation to imines integrated with H2 production presents a promising means simultaneous of high-value-added fine chemicals and clean fuels. Yet, the effectiveness this strategy is generally limited by poor charge separation photocatalysts uncontrolled hydrogenation secondary amines. Herein, spatial decoupling proposed isolate redox chemistry at distinct sites photocatalysts, CoP core–ZnIn2S4 shell (CoP@ZnIn2S4) coaxial nanorods are assembled as proof-of-concept photocatalyst. Directional ultrafast carrier occurs between core ZnIn2S4 shell, confirmed in situ X-ray photoelectron spectroscopy, surface photovoltage transient absorption spectroscopy analyses. Toward photoconversion model substrate benzylamine N-benzylbenzaldimine, CoP@ZnIn2S4 exhibits 48-time higher rate >99% selectivity when compared (ca. 20% selectivity), detailed reaction mechanism has been verified diffuse reflectance infrared Fourier transform spectroscopy.

Language: Английский

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Boosting holes generation and O2 activation by bifunctional NiCoP modified Bi4O5Br2 for efficient photocatalytic aerobic oxidation

Applied Catalysis B Environment and Energy, Journal Year: 2022, Volume and Issue: 320, P. 121978 - 121978

Published: Sept. 13, 2022

Language: Английский

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