A Review on MXene Synthesis, Stability, and Photocatalytic Applications

ACS Nano, Journal Year: 2022, Volume and Issue: 16(9), P. 13370 - 13429

Published: Sept. 12, 2022

Photocatalytic water splitting, CO2 reduction, and pollutant degradation have emerged as promising strategies to remedy the existing environmental energy crises. However, grafting of expensive less abundant noble-metal cocatalysts on photocatalyst materials is a mandatory practice achieve enhanced photocatalytic performance owing ability extract electrons efficiently from enable rapid/enhanced catalytic reaction. Hence, developing highly efficient, inexpensive, noble-metal-free composed earth-abundant elements considered noteworthy step toward considering photocatalysis more economical strategy. Recently, MXenes (two-dimensional (2D) transition-metal carbides, nitrides, carbonitrides) shown huge potential alternatives for cocatalysts. several excellent properties, including atomically thin 2D morphology, metallic electrical conductivity, hydrophilic surface, high specific surface area. In addition, they exhibit Gibbs free intermediate H atom adsorption close zero than that commercial Pt-based cocatalyst, Fermi level position above H2 generation potential, an capture activate molecules. Therefore, there growing interest in MXene-based various events. this review, we focus recent advances synthesis with 0D morphologies, stability MXenes, photocatalysts evolution, degradation. The challenges possible future directions enhance are also discussed.

Language: Английский

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MXenes Antibacterial Properties and Applications: A Review and Perspective

Small, Journal Year: 2023, Volume and Issue: 19(14)

Published: Jan. 5, 2023

The mutations of bacteria due to the excessive use antibiotics, and generation antibiotic-resistant have made development new antibacterial compounds a necessity. MXenes emerged as biocompatible transition metal carbide structures with extensive biomedical applications. This is related MXenes' unique combination properties, including multifarious elemental compositions, 2D-layered structure, large surface area, abundant terminations, excellent photothermal photoelectronic properties. focus this review application MXenes, which has attracted attention researchers since 2016. A quick overview synthesis strategies provided then summarizes effect various factors (including structural optical charges, flake size, dispersibility) on biocidal activity MXenes. main mechanisms for deactivating by are discussed in detail rupturing bacterial membrane sharp edges nanoflakes, generating reactive oxygen species (ROS), bacteria. Hybridization other organic inorganic materials can result improved activities different applications such wound dressings water purification. Finally, challenges perspectives MXene nanomaterials agents presented.

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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Emerging frontiers of Z-scheme photocatalytic systems

Trends in Chemistry, Journal Year: 2021, Volume and Issue: 4(2), P. 111 - 127

Published: Dec. 18, 2021

Language: Английский

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Recent Progress in the Synthesis and Applications of Composite Photocatalysts: A Critical Review

Small Methods, Journal Year: 2021, Volume and Issue: 6(2)

Published: Dec. 16, 2021

Photocatalysis is an advanced technique that transforms solar energy into sustainable fuels and oxidizes pollutants via the aid of semiconductor photocatalysts. The main scientific technological challenges for effective photocatalysis are stability, robustness, efficiency For practical applications, researchers trying to develop highly efficient stable Since literature scattered, it urgent write a critical review summarizes state-of-the-art progress in design variety composite photocatalysts environmental applications. Herein, comprehensive presented overview, history, mechanism, advantages, photocatalysis. Further, recent advancements heterostructure including alloy quantum dots based composites, carbon composites nanotubes, dots, graphitic nitride, graphene, covalent-organic frameworks metal carbides, halide perovskites, nitrides, oxides, phosphides, sulfides, metal-organic plasmonic materials single atom CO2 conversion, H2 evolution, oxidation discussed elaborately. Finally, perspectives further improvement provided.

Language: Английский

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Ti3C2 MXene/NH2-MIL-88B(Fe): Research on the adsorption kinetics and photocatalytic performance of an efficient integrated photocatalytic adsorbent

Applied Surface Science, Journal Year: 2021, Volume and Issue: 570, P. 151244 - 151244

Published: Sept. 9, 2021

Language: Английский

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Atomic-level insights into surface engineering of semiconductors for photocatalytic CO2 reduction

Journal of Energy Chemistry, Journal Year: 2021, Volume and Issue: 67, P. 309 - 341

Published: Oct. 25, 2021

Photocatalytic conversion of CO2 into solar fuels provides a bright route for the green and sustainable development human society. However, realization efficient photocatalytic reduction reaction (CO2RR) is still challenging owing to sluggish kinetics or unfavorable thermodynamics basic chemical processes CO2RR, such as adsorption, activation, product desorption. To overcome these shortcomings, recent works have demonstrated that surface engineering semiconductors, introducing vacancy, doping, cocatalyst loading, serves effective promising strategies improved CO2RR with high activity selectivity. The essential reason lies in activation pathways can be optimized regulated through reconstruction atomic electronic structures. Herein, this review, we focus on research advances about rational design semiconductor CO2RR. selectivity will reviewed. In addition, theoretical calculations along situ characterization techniques spotlight clarify process. aim review provide deep understanding guidance semiconductors

Language: Английский

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Recent advances on cobalt metal organic frameworks (MOFs) for photocatalytic CO2 reduction to renewable energy and fuels: A review on current progress and future directions

Energy Conversion and Management, Journal Year: 2022, Volume and Issue: 253, P. 115180 - 115180

Published: Jan. 5, 2022

Language: Английский

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CeO2 as a photocatalytic material for CO2 conversion: A review

Solar Energy, Journal Year: 2022, Volume and Issue: 240, P. 443 - 466

Published: May 26, 2022

Language: Английский

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A review on Z/S – scheme heterojunction for photocatalytic applications based on metal halide perovskite materials

Applied Surface Science Advances, Journal Year: 2022, Volume and Issue: 9, P. 100241 - 100241

Published: April 1, 2022

As an emerging class of semiconductors, Metal Halide Perovskites (MHPs) form a major paradigm photocatalysts for its truly unique and superior optoelectronic properties over the traditional photocatalysts. Based on similar phenomenon plant's chlorophyll, use solar radiation to split water into oxygen hydrogen. MHPs, therefore significantly contribute family as novel rapidly expanding technological advancement. Whereas Z-scheme heterojunction is charge transfer mechanism that promotes diversified photocatalytic operations by utilizing ability sunlight, correctly synthesized semiconductor are potential substances addressing today's energy environmental concerns. Expanding number active reductive oxidative sites possessing high redox capacity just handful advantages recently designed which closely mimic actual photosynthesis mechanism. An efficient direct Z scheme heterojunction, system combined with enables us create higher efficiency activity. By combining second constituent appropriate band arrangement offsets, can be created, enabling innate competencies perovskites fully utilized. However, low inspires towards more step-scheme (S-scheme) photocatalysts, alternatively dwell developing heterojunctions incorporating multitude essential properties. This review paper focuses basic understanding different classes studied in academic world, would rather important define why MHP may successful endeavor being applications like CO2 reduction H2 evolution. given MHPs still infancy considered commercially, it underline present readiness level this technology drawbacks if any therefore, imperative lay down future roadmap development these

Language: Английский

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