Graphene/inorganic nanocomposites: Evolving photocatalysts for solar energy conversion for environmental remediation

Journal of Saudi Chemical Society, Journal Year: 2022, Volume and Issue: 26(6), P. 101544 - 101544

Published: Sept. 13, 2022

Current energy crisis and environmental issues, including depletion of fossil fuels, rapid industrialization, undesired CO2 emission resulting in global warming has created havoc for the population significantly affected quality life. In this scenario problems forefront research priorities. Development renewable resources particularly efficient conversion solar light to sustainable is crucial addressing problems. regard, synthesis semiconductors-based photocatalysts emerged as an effective tool different photocatalytic applications remediation. Among photocatalyst options available, graphene derivatives such as, oxide (GO), highly reduced (HRG), doped (N, S, P, B-HRG) have become rising stars on horizon applications. Graphene a single layer graphite consisting unique planar structure, high conductivity, greater electron mobility, very specific surface area. Besides, recent advancements synthetic approaches led cost-effective production graphene-based materials large-scale. Therefore, gained considerable recognition semiconducting involving other materials. The semiconductors surpasses electron-holes pairs recombination rate lowers band gap by tailoring valence (VB) conduction (CB) leading enhanced performance hybrid photocatalysts. Herein, we summarized latest developments designing fabrication using variety commonly applied methods post-deposition methods, in-situ binding hydrothermal and/or solvothermal approaches. addition, will discuss properties various remediation processes as; (i) clean H2 fuel production, (ii) pollutants degradation, (iii) photo-redox organic transformation (iv) photo-induced reduction. On whole, inclusion more than 300 references, review possibly covered detail aspects semiconductor processes. Finally, conclude short summary discussion about future perspectives, challenges new directions these emerging areas research.

Language: Английский

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Modulating the electron structure of Co-3d in Co3O4−x/WO2.72 for boosting peroxymonosulfate activation and degradation of sulfamerazine: Roles of high-valence W and rich oxygen vacancies

Journal of Hazardous Materials, Journal Year: 2022, Volume and Issue: 445, P. 130576 - 130576

Published: Dec. 8, 2022

Language: Английский

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g-C3N4-Based Direct Z-Scheme Photocatalysts for Environmental Applications

Catalysts, Journal Year: 2022, Volume and Issue: 12(10), P. 1137 - 1137

Published: Sept. 28, 2022

Photocatalysis represents a promising technology that might alleviate the current environmental crisis. One of most representative photocatalysts is graphitic carbon nitride (g-C3N4) due to its stability, cost-effectiveness, facile synthesis procedure, and absorption properties in visible light. Nevertheless, pristine g-C3N4 still exhibits low photoactivity rapid recombination photo-induced electron-hole (e−-h+) pairs. To solve this drawback, Z-scheme based on are superior alternatives since these systems present same band configuration but follow different charge carrier mechanism. contextualize topic, main drawbacks using as photocatalyst applications mentioned review. Then, basic concepts characterization addressed obtain novel with suitable photocatalytic activity (pollutant abatement, H2 production, CO2 reduction). Focusing g-C3N4, examples referred to, analyzed, commented text. conclude review, an outlook future challenges prospects g-C3N4-based addressed.

Language: Английский

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Facile synthesis of a novel recyclable dual Z-scheme WO3/NiFe2O4/BiOBr composite with broad-spectrum response and enhanced sonocatalytic performance for levofloxacin removal in aqueous solution

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 461, P. 141941 - 141941

Published: Feb. 16, 2023

Language: Английский

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Enhanced photocatalytic H2 evolution and anti-photocorrosion of sulfide photocatalyst by improving surface reaction: A review

International Journal of Hydrogen Energy, Journal Year: 2023, Volume and Issue: 48(63), P. 24264 - 24284

Published: April 3, 2023

Language: Английский

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The structure-dependent mechanism of single-atom cobalt on macroporous carbon nitride in (photo-)Fenton-like reactions

Journal of Materials Chemistry A, Journal Year: 2023, Volume and Issue: 11(25), P. 13653 - 13664

Published: Jan. 1, 2023

Ordered macroporous carbon nitride supported single-atom Co catalysts with Co–N 1+3 /Co–N 2+2 geometric structures are developed using a spatial confinement strategy for (photo-)Fenton-like catalytic reactions.

Language: Английский

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Boosting catalytic efficiency via BiVO4 surface heterojunction-induced interfacial Z-scheme NiFe2O4/{0 1 0}BiVO4 composite

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 318, P. 123949 - 123949

Published: April 28, 2023

Language: Английский

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Constructing Z-scheme WO₃/C₃N₄ heterojunctions with an enlarged internal electric field and accelerated water oxidation kinetics for robust CO₂ photoreduction

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: 12(24), P. 14426 - 14436

Published: Jan. 1, 2024

The enlarged internal electric field and accelerated H 2 O oxidation kinetics synergically enhance the CO photoreduction activity of Z-scheme WO 3 /C N 4 heterojunctions.

Language: Английский

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Electronic Structure and Functions of Carbon Nitride in Frontier Green Catalysis

Accounts of Chemical Research, Journal Year: 2024, Volume and Issue: 57(16), P. 2303 - 2315

Published: Aug. 6, 2024

ConspectusGraphitic carbon nitride-based materials have emerged as promising photocatalysts for a variety of energy and environmental applications owing to their "earth-abundant" nature, structural versatility, tunable electronic optical properties, chemical stability. Optimizing nitride's physicochemical properties encompasses approaches, including the regulation inherent defects, morphology control, heterostructure construction, heteroatom metal-atom doping. These strategies are pivotal in ultimately enhancing photocatalytic activities. Previous reviews with extensive examples mainly focused on synthesis, modification, application photocatalysis. However, there has been lack straightforward in-depth discussion understand characteristics functions various engineered nitrides well precise tailoring explain regularity specificity improved performance targeted systems. In past ten years, our group conducted investigations studies demonstrate close yet intricate relationship between structure nitride reactivity. Understanding nitride, different engineering strategies, is essential improvement processes from fundamental study practical applications.To this end, Account, we first delve into nature highlighting structures, band structure, density states, molecular orbitals, center, its functions, such charge distribution, internal electric field, external force. Subsequently, based recent research group, present detailed strategic modifications consequential impacts particularly intrinsic characteristics, performance. categorized follows: (i) component changing, which involves intralayer interface heterojunctions homojunctions, modulate band-edge potentials reactivity photoinduced electrons holes toward surface redox reactions; (ii) dimensional tuning, engineers influence electron transfer direction; (iii) defect introduces symmetry break framework, promote redistribution altering structure; (iv) anchoring single-atom metals facilitate orbital hybridization enhancement through unique metal-N coordination configurations. Finally, propose an appraisal prospects challenges manipulation characterization nitride. The integration

Language: Английский

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Facile fabrication of AgBr/HCCN hybrids with Z-scheme heterojunction for efficient photocatalytic hydrogen evolution

Applied Surface Science, Journal Year: 2024, Volume and Issue: 651, P. 159292 - 159292

Published: Jan. 2, 2024

Constructing a Z-scheme heterojunction with enhanced photocatalytic hydrogen evolution for graphitic carbon nitride-based (g-C3N4) composites is challenging because integrating g-C3N4 other semiconductors, without specific band structure design, typically results in type I or II heterojunctions. These heterojunctions have lower redox ability and limited enhancement photocatalysis. Herein, we select highly crystalline nitride (HCCN) as proof-of-concept substrate. For the first time, develop AgBr nanosphere/HCCN composite photocatalyst that features an all-solid-state direct visible-light evolution. The electron transfer mechanism initially studied from structures Fermi levels of HCCN AgBr. It subsequently confirmed by X-ray photoelectron spectroscopy (XPS), microscopy. close contact built-in field promote migration separation photogenerated electrons holes photocatalyst. Due to redistribution charge carriers, shows superior capability markedly performance compared its individual components. Combining all advantages, reached apparent quantum efficiency (AQE) 6 % under illumination 410 nm, which 4 times higher than single component.

Language: Английский

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