Near‐Infrared Light‐Driven Photocatalysis with an Emphasis on Two‐Photon Excitation: Concepts, Materials, and Applications

Advanced Materials, Journal Year: 2023, Volume and Issue: 36(5)

Published: Sept. 13, 2023

Efficient utilization of sunlight in photocatalysis is widely recognized as a promising solution for addressing the growing energy demand and environmental issues resulting from fossil fuel consumption. Recently, there have been significant developments various near-infrared (NIR) light-harvesting systems artificial photosynthesis photocatalytic remediation. This review provides an overview most recent advancements NIR light through creation novel nanostructured materials molecular photosensitizers, well modulating strategies to enhance processes. A special focus given emerging two-photon excitation photocatalysis. The unique features limitations different are critically evaluated. In particular, it highlights advantages utilizing compared UV-visible irradiation one-photon excitation. Ongoing challenges potential solutions future exploration light-responsive also discussed.

Language: Английский

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Microplastic pollution as an environmental risk exacerbating the greenhouse effect and climate change: a review

Carbon Research, Journal Year: 2024, Volume and Issue: 3(1)

Published: Jan. 26, 2024

Abstract Microplastics are polymer-based materials with carbon as their main framework. During degradation, they release greenhouse gases such dioxide and methane. Additionally, environmental microplastics can enter plant tissues, triggering oxidative stress in cells, adversely affecting photosynthesis, metabolism, gene expression, other growth parameters. This reduction efficiency sequestering utilizing atmospheric indirectly impacts global cycling, exacerbating the effect. Furthermore, significantly alter soil structure composition of microbial communities, emissions dioxide, methane, nitrous oxide, thus promoting gas emissions. Increasing research suggests a mutual reinforcement between microplastic pollution climate warming, where exacerbates rise average temperature leads to resuspension sediments, intensifying environment. article primarily focuses on different ecosystems relationship warming. It summarizes effects marine, terrestrial, ecosystems, well mechanisms by which change affect ecosystem services. By delving into intricate connection emissions, this paper aims raise awareness caused calls for further change, ultimate goal protecting human health. Graphical

Language: Английский

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Revisiting Solar Energy Flow in Nanomaterial-Microorganism Hybrid Systems

Chemical Reviews, Journal Year: 2024, Volume and Issue: 124(15), P. 9081 - 9112

Published: June 20, 2024

Nanomaterial-microorganism hybrid systems (NMHSs), integrating semiconductor nanomaterials with microorganisms, present a promising platform for broadband solar energy harvesting, high-efficiency carbon reduction, and sustainable chemical production. While studies underscore its potential in diverse solar-to-chemical conversions, prevailing NMHSs grapple suboptimal conversion efficiency. Such limitations stem predominantly from an insufficient systematic exploration of the mechanisms dictating flow. This review provides overview notable advancements this nascent field, particular focus on discussion three pivotal steps flow: capture, cross-membrane transport, into chemicals. key challenges faced each stage are independently identified discussed, viable solutions correspondingly postulated. In view interplay affecting overall efficiency conversion, subsequent discussions thus take integrative viewpoint to comprehend, analyze improve flow current different configurations, highlighting contemporary techniques that can be employed investigate various aspects within NMHSs. Finally, concluding section summarizes opportunities future research, providing roadmap continued development optimization

Language: Английский

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Upgrading structural conjugation in covalent organic framework with spatial dual sites enables boosting solar-to-H2O2-to-•OH for environmental remediation

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 356, P. 124216 - 124216

Published: May 18, 2024

Language: Английский

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Integrated Photochromic‐Photothermal Processes for Catalytic Plastic Upcycling

Angewandte Chemie International Edition, Journal Year: 2023, Volume and Issue: 62(38)

Published: Aug. 2, 2023

Incorporating high-energy ultraviolet (UV) photons into photothermal catalytic processes may enable photothermal-photochemical synergistic catalysis, which represents a transformative technology for waste plastic recycling. The major challenge is avoiding side reactions and by-products caused by these energetic photons. Here, we break through the limitation of existing conversion mechanism propose photochromic-photothermal system based on polyol-ligated TiO2 nanocrystals. Upon UV or sunlight irradiation, chemically bonded polyols can rapidly capture holes generated , enabling photogenerated electrons to reduce Ti4+ Ti3+ produce oxygen vacancies. resulting abundant defect energy levels boost sunlight-to-heat efficiency, simultaneously vacancies facilitate polyester glycolysis activating nucleophilic addition-elimination process. As result, compared commercial (P25), achieve 6-fold 12.2-fold performance enhancements under thermal conditions, respectively, while maintaining high selectivity high-valued monomers. This paradigm-shift strategy directs catalysts avoids their interaction with reactants, opening possibility substantially elevating efficiency more solar-driven catalysis.

Language: Английский

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Catalytic approaches for the removal of microplastics from water: Recent advances and future opportunities

Chemical Engineering Journal Advances, Journal Year: 2023, Volume and Issue: 16, P. 100529 - 100529

Published: June 26, 2023

Microplastics, which are small plastic particles, have become a growing environmental concern due to their prevalence in aquatic and terrestrial environments. They persist for decades potentially centuries resistance degradation can harm organisms release toxic chemicals. There has been increasing interest developing methods removal from the environment, particularly water. Catalytic processes shown promise as potential method microplastic elimination, including biological methods, advanced oxidation processes, hydrolysis. This review article focuses on recent advances catalytic of microplastics water, various types catalysts applications. It also discusses be integrated into real-world water treatment systems microplastics. The highlights challenges opportunities associated with environment aims contribute development more effective sustainable addressing this issue. Future research should focus hybrid catalyst that combine strengths multiple improved efficiency effectiveness. Additionally, explore use natural materials may offer environmentally friendly options. Collaboration between scientists, engineers, policymakers, public will critical implementation these systems. elimination requires multifaceted approach, continued collaboration necessary develop protect health our communities.

Language: Английский

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An Integrated Plasma–Photocatalytic System for Upcycling of Polyolefin Plastics

ChemSusChem, Journal Year: 2023, Volume and Issue: 16(14)

Published: March 28, 2023

Nondegradable polyolefin plastics, which account for >60 % of total plastic waste, trigger severe global concerns and thus demand effective management technologies. However, owing to the chemical inertness non-polar C-C backbones in structure, efficient upcycling plastics under ambient conditions remains a great challenge. This study introduces an integrated plasma-photocatalytic technology, coupling plasma treatment with solar-driven reforming mild conditions, into value-added hydrogen gaseous fuels. The first step grafts oxygenated groups, such as -OH, O-C=O, C=O, onto chains, leads formation polar hydrophilic polymer that facilitates subsequent photocatalytic step. Therefore, high production activity benchmark efficiency >100 μmol g-1 h-1 was achieved. Moreover, process also demonstrates versatility different including polyethylene, polypropylene polyvinyl chloride. findings provide new avenue sustainable way.

Language: Английский

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Artificial photosynthesis bringing new vigor into plastic wastes

SmartMat, Journal Year: 2023, Volume and Issue: 4(4)

Published: March 29, 2023

Abstract The accumulation of plastic wastes in landfills and the environment threatens our public health, while leading to loss potential carbon resources. urgent necessary lies developing an energy‐saving environmentally benign approach upgrade into value‐added chemicals. Artificial photosynthesis holds ability realize upcycling by using endless solar energy under mild conditions, but remains initial stage for upgrading. In this review, we aim look critically at photocatalytic conversion from perspective resource reutilization. To begin with, present emerging routes highlight advantages artificial processing wastes. By parsing process, demonstrate currently available plastic, including photodegradation, tandem decomposition CO 2 reduction, selective oxidation, as well photoreforming plastic. This review concludes with a personal advances challenges conversion.

Language: Английский

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Photocatalytic production of ethylene and propionic acid from plastic waste by titania-supported atomically dispersed Pd species

Science Advances, Journal Year: 2023, Volume and Issue: 9(49)

Published: Dec. 8, 2023

Current chemical recycling of bulk synthetic plastic, polyethylene (PE), operates at high temperature/pressure and yields a complex mixture products. PE conversion under mild conditions with good selectivity toward value-added chemicals remains practical challenge. Here, we demonstrate an atomic engineering strategy to modify TiO 2 photocatalyst reversible Pd species for the selective ethylene (C H 4 ) propionic acid via dicarboxylic intermediates moderate conditions. -supported atomically dispersed exhibits C evolution 531.2 μmol g cat −1 hour , 408 times that pristine . The liquid product is valuable propanoic 98.8% selectivity. Plastic hydrocarbon yield 0.9% 6.3% was achieved in oxidation coupled 3 hours photoreaction. In situ spectroscopic studies confirm dual role species: electron acceptor boost charge separation/transfer efficient photoredox, mediator stabilize reaction decarboxylation.

Language: Английский

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Efficient Hydrogen Peroxide Photosynthesis over CdS/COF for Water Disinfection: The S-Scheme Pathway, Oxygen Adsorption, and Reactor Design

ACS Sustainable Chemistry & Engineering, Journal Year: 2023, Volume and Issue: 11(49), P. 17552 - 17563

Published: Nov. 29, 2023

Solar-driven photocatalytic hydrogen peroxide (H2O2) production presents a promising avenue for achieving sustainable water disinfection. However, the development of robust and durable system practical applications remains notable unresolved challenge. Herein, star photocatalyst, covalent organic frameworks (COFs), was modified with CdS boosting environmentally benign H2O2 synthesis. Under simulated sunlight without sacrificial reagents, composite material exhibited capacity production, which attributable to establishment "step" (S)-scheme transfer pathway facilitation adequate oxygen diffusion. Nevertheless, it found that photocatalytically derived alone inefficient disinfection performance, whereas addition Fe(II) allowed rapid inactivation Escherichia coli, emphasizing pivotal importance integrating photocatalysis Fenton reactions within system. Furthermore, dual-compartment reactor, employing semipermeable membrane, devised spatially segregate photocatalysts from microorganisms. Such an operation mode enabled diffusion compartment microbial compartment, thereby "long-distance" sterilization manner simultaneous consummating recovery strategy photocatalysts. This study not only provides paradigmatic approach COF-based but also illuminates innovative technological option photocatalytic-based

Language: Английский

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