Simultaneous Dual-Functional Photocatalysis by g-C₃N₄-Based Nanostructures

ACS ES&T Engineering, Journal Year: 2022, Volume and Issue: 2(4), P. 564 - 585

Published: Jan. 24, 2022

Heterogeneous photocatalytic reactions have experienced many efforts in developing new materials to tackle environmental and energy crises through utilizing appropriate photocatalysts wastewater treatment, H2 generation, organic transformations, CO2 reduction, N2 photofixation, biomass conversion. While these processes are addressed the literature separately, a recent innovative viewpoint is employ system achieve simultaneously two or more functions. The challenging point that combination of functions one requires novel design engineering an semiconductor photocatalyst with special characteristics for each application particular environment. Recently, graphitic carbon nitride (g-C3N4) its unique physicochemical properties has gained tremendous attention among researchers due great potential utilization as dual-functional photocatalyst. In this study, role morphological band gap manipulation heterojunction formation g-C3N4 will be considered. These newly applied strategies useful improve activity different simultaneous reactions. Furthermore, detailed information on g-C3N4-based discussed reactions: namely, (i) generation combined oxidation pollutants, (ii) mineralization pollutants reduction obtained CO2, (iii) removal mixture heavy metals, (iv) H+ (v) conjunction substrates/biomass value-added products, (vi) H2O2 production. approaches could provide efficient sustainable involved both issues.

Language: Английский

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Solar fuel generation over nature-inspired recyclable TiO2/g-C3N4 S-scheme hierarchical thin-film photocatalyst

Journal of Material Science and Technology, Journal Year: 2021, Volume and Issue: 112, P. 1 - 10

Published: Dec. 12, 2021

Language: Английский

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Tailor‐Engineered 2D Cocatalysts: Harnessing Electron–Hole Redox Center of 2D g‐C₃N₄ Photocatalysts toward Solar‐to‐Chemical Conversion and Environmental Purification

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(29)

Published: Feb. 23, 2022

Abstract Sparked by natural photosynthesis, solar photocatalysis using metal‐free graphitic carbon nitride (g‐C 3 N 4 ) with appealing electronic structure has turned up as the most captivating technique to quest for sustainable energy generation and pollution‐free environment. Nonetheless, low‐dimensional g‐C is thwarted from sluggish kinetics rapid recombination of photogenerated carriers upon light irradiation. Among multifarious modification strategies, engineering 2D cocatalysts anticipated accelerate redox kinetics, augment active sites ameliorate electron–hole separation boosted activity thanks its face‐to‐face contact surface. It timely technological significance review 2D/2D interfaces state‐of‐the‐art cocatalysts, spanning carbon‐containing phosphorus‐containing, metal dichalcogenide, other cocatalysts. Fundamental principles each photocatalytic application will be introduced. Thereafter, recent advances cocatalyst‐mediated systems critically evaluated based on their interfacial engineering, emerging roles, impacts toward stability catalytic efficiency. Importantly, mechanistic insights into charge dynamics structure–performance relationship deciphered. Last, noteworthy research directions are prospected deliver insightful ideas future development . Overall, this serve a scaffold cornerstone in designing dimensionality‐dependent cocatalyst‐assisted renewable ecologically green

Language: Английский

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Engineering of Transition Metal Sulfide Nanostructures as Efficient Electrodes for High-Performance Supercapacitors

ACS Applied Energy Materials, Journal Year: 2022, Volume and Issue: 5(6), P. 6481 - 6498

Published: May 25, 2022

Supercapacitors (SCs) are highly promising electrochemical energy conversion and storage devices. SCs display an outstanding power performance, excellent reversibility, long-term stability, simple operation, high feasibility for integration into electronic devices, including consumer electronics, memory backup systems, industrial management systems. The electrode materials determine the cell capacitance, operating voltage, density, time constant of SCs. Transition metal-based (TMEMs) among most electrodes SCs, due to their specific quick charging/discharging rates, in addition ease preparation a yield from low-cost earth-abundant resources. Binary transition metal sulfides (BTMSs) possess various advantages relative other TMEMs, higher capacity, electrical conductivity, redox properties, better quicker electron/ion diffusion, superior reversibility with long cycle life. Herein, inventory recent progress rational design BTMS deliberated, spaning methods operative conditions, mechanism. To help assist further development efficient durable current underlying challenges possible solutions identified addressed, emphasis on device performance vs type merits.

Language: Английский

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Versatile Photoelectrocatalysis Strategy Raising Up the Green Production of Hydrogen Peroxide

Advanced Energy Materials, Journal Year: 2023, Volume and Issue: 13(14)

Published: March 1, 2023

Abstract H 2 O plays an irreplaceable role in many aspects of human society, such as paper bleaching, medical disinfection, wastewater treatment, organic synthesis, hydrometallurgy and the electronic industry. However, unsustainability current industrial production process traditional anthraquinone has a serious conflict with green sustainable development. The photo/electrocatalytic from renewable energy advantages being more economical, low‐carbon green, line requirements economy. These catalytic methods have played demonstrative development small molecules, contributing to fundamental understanding general catalysis providing scientific perspective for future new cycles. In this review, authors aim integrate reaction mechanism photocatalytic electrocatalytic production, summarize application recent years, assess modern technologies promoted research, including flux equipment coproduction, etc. This review intends provide clear logic profile directions calls researchers insights into field.

Language: Английский

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Multifunctional carbon nitride nanoarchitectures for catalysis

Chemical Society Reviews, Journal Year: 2023, Volume and Issue: 52(21), P. 7602 - 7664

Published: Jan. 1, 2023

Carbon nitrides, with feasibility of tailored band gap via suitable nanoarchitectonics, are deemed as best catalysts amongst existing materials, especially for HER, OWS, COR, NRR, water oxidation, pollutant removal, and organocatalysis.

Language: Английский

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Catalytic Hydrogenation of CO2 to Methanol: A Review

Catalysts, Journal Year: 2022, Volume and Issue: 12(4), P. 403 - 403

Published: April 6, 2022

High-efficiency utilization of CO2 facilitates the reduction concentration in global atmosphere and hence alleviation greenhouse effect. The catalytic hydrogenation to produce value-added chemicals exhibits attractive prospects by potentially building energy recycling loops. Particularly, methanol is one practically important objective products, synthesize has been extensively studied. In this review, we focus on some basic concepts activation, recent research advances methanol, development high-performance catalysts, microscopic insight into reaction mechanisms. Finally, thinking present possible future trend presented.

Language: Английский

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Converting CO₂ into Value‐Added Products by Cu₂O‐Based Catalysts: From Photocatalysis, Electrocatalysis to Photoelectrocatalysis

Small, Journal Year: 2023, Volume and Issue: 19(19)

Published: Feb. 11, 2023

Abstract Converting CO 2 into value‐added products by photocatalysis, electrocatalysis, and photoelectrocatalysis is a promising method to alleviate the global environmental problems energy crisis. Among semiconductor materials applied in catalytic reduction, Cu O has advantages of abundant reserves, low price friendliness. Moreover, unique adsorption activation properties for , which conducive generation C 2+ through CC coupling. This review introduces basic principles reduction summarizes pathways 1 products. The factors affecting performance are further discussed from perspective reaction environment, medium, novel reactor design. Then, O‐based catalysts summarized several optimization strategies enhance their stability redox capacity discussed. Subsequently, application photocatalytic, electrocatalytic, photoelectrocatalytic described. Finally, opportunities, challenges research directions field presented, guidance its wide fields provided.

Language: Английский

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Facilitating Molecular Activation and Proton Feeding by Dual Active Sites on Polymeric Carbon Nitride for Efficient CO₂Photoreduction

Angewandte Chemie International Edition, Journal Year: 2022, Volume and Issue: 61(46)

Published: Sept. 23, 2022

Photoreduction of CO2 provides an appealing way to alleviate the energy crisis and manage global carbon balance but is limited by high activation rate-limiting proton transfer. We now develop a dual-site strategy for high-efficiency conversion through polarizing molecules at pyridine N vacancies accelerating intermediate protonation protonated adjacent nitrogen on polymeric nitride. Our photocatalysts with atomic-level engineered active sites manifest CO production rate 1835 μmol g-1 h-1 , 183 times higher than pristine bulk Theoretical prediction experimental studies confirm that such excellent performance attributed synergistic effect between vacant in decreasing formation key *COOH intermediates efficient electron transfer relay facilitated defect-induced shallow trap state homogeneous charge mediators.

Language: Английский

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Advances in Carbon Nitride-Based Materials and Their Electrocatalytic Applications

ACS Catalysis, Journal Year: 2022, Volume and Issue: 12(9), P. 5605 - 5660

Published: April 26, 2022

As a group of large-surface-area nonmetal materials, polymeric carbon nitride (CxNy) and its hybrid structures are nowadays ever-increasing interest for use in energy devices involved conversion storage, offering low expenses facile production processes. With the growing requirement clean renewable generation storage systems, progress replacement expensive noble-metal catalysts with CxNy-based materials as efficient electrocatalysts has expanded considerably, demand these increased. The modified CxNy architectures beneficial to electrocatalytic applications, improving their moderate electrical conductivities capacity loss. present review strives highlight recent advances research on aforementioned identities CxNy-derived structurally polymorphs. This also discusses fuel cells, metal–air batteries, water splitting supercapacitor applications. Herein, we deal oxidation reduction reactions such hydrogen evolution, oxygen reduction, CO2 nitrogen etc. Each device been studied clearer understanding patent relevant experiments reviewed separately. Additionally, role some general redox capable being exploited any is included.

Language: Английский

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