Structural Color from Cellulose Nanocrystals or Chitin Nanocrystals: Self-Assembly, Optics, and Applications

Chemical Reviews, Journal Year: 2023, Volume and Issue: 123(23), P. 12595 - 12756

Published: Nov. 27, 2023

Widespread concerns over the impact of human activity on environment have resulted in a desire to replace artificial functional materials with naturally derived alternatives. As such, polysaccharides are drawing increasing attention due offering renewable, biodegradable, and biocompatible feedstock for nanomaterials. In particular, nanocrystals cellulose chitin emerged as versatile sustainable building blocks diverse applications, ranging from mechanical reinforcement structural coloration. Much this interest arises tendency these colloidally stable nanoparticles self-organize water into lyotropic cholesteric liquid crystal, which can be readily manipulated terms its periodicity, structure, geometry. Importantly, helicoidal ordering retained solid-state, an accessible route complex nanostructured films, coatings, particles. review, process forming iridescent, structurally colored films suspensions (CNCs) is summarized mechanisms underlying chemical physical phenomena at each stage explored. Analogy then drawn (ChNCs), allowing key differences critically assessed strategies toward coloration presented. progress translating technology academia industry summarized, unresolved scientific technical questions put forward challenges community.

Language: Английский

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FeNC Oxygen Reduction Electrocatalyst with High Utilization Penta‐Coordinated Sites

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(14)

Published: Feb. 5, 2023

Atomic Fe in N-doped carbon (FeNC) electrocatalysts for oxygen (O2 ) reduction at the cathode of proton exchange membrane fuel cells are most promising alternative to platinum-group-metal catalysts. Despite recent progress on atomic FeNC O2 reduction, their controlled synthesis and stability practical applications remain challenging. A two-step approach has recently led significant advances terms Fe-loading mass activity; however, utilization remains low owing difficulty building scaffolds with sufficient porosity that electrochemically exposes active sites. Herein, this issue is addressed by coordinating a highly porous nitrogen-doped support (≈3295 m2 g-1 ), prepared pyrolysis inexpensive 2,4,6-triaminopyrimidine Mg2+ salt site template porogen. Upon coordination, high electrochemical density 2.54 × 1019 sites gFeNC-1 record 52% FeNx based situ nitrite stripping achieved. The single atoms characterized pre- post-electrochemical accelerated stress testing aberration-corrected high-angle annular dark field scanning transmission electron microscopy, showing no clustering. Moreover, ex X-ray absorption spectroscopy low-temperature Mössbauer suggest presence penta-coordinated sites, which further studied functional theory calculations.

Language: Английский

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Laser‐Carbonization – A Powerful Tool for Micro‐Fabrication of Patterned Electronic Carbons

Advanced Materials, Journal Year: 2023, Volume and Issue: 35(38)

Published: Feb. 26, 2023

Fabricating electronic devices from natural, renewable resources is a common goal in engineering and materials science. In this regard, carbon of special significance due to its biocompatibility combined with electrical conductivity electrochemical stability. microelectronics, however, carbon's device application often inhibited by tedious expensive preparation processes lack control over processing material parameters. Laser-assisted carbonization emerging as tool for the precise selective synthesis functional carbon-based flexible applications. contrast conventional via in-furnace pyrolysis, laser-carbonization induced photo-thermally occurs on time-scale milliseconds. By careful selection precursors process parameters, properties so-called laser-patterned (LP-C) such porosity, surface polarity, groups, degree graphitization, charge-carrier structure, etc. can be tuned. critical review, perspective generated context general strategies, fundamentals laser-induced processing, applications, like electrodes sensors, electrocatalysts, energy storage, or antennas. An attempt made have equal emphasis aspects that technology optimally positioned broader microfabrication.

Language: Английский

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Near ambient N2 fixation on solid electrodes versus enzymes and homogeneous catalysts

Nature Reviews Chemistry, Journal Year: 2023, Volume and Issue: 7(3), P. 184 - 201

Published: Feb. 1, 2023

Language: Английский

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Assessing the environmental and health impacts of plastic production and recycling

World Journal of Biology Pharmacy and Health Sciences, Journal Year: 2024, Volume and Issue: 17(2), P. 232 - 241

Published: Feb. 20, 2024

Plastic production and recycling have become integral processes in modern society, but their environmental health impacts garnered significant attention recent years. This review outlines key findings from a comprehensive assessment of these impacts, drawing range scientific literature empirical studies. The footprint plastic encompasses various stages, extraction raw materials to manufacturing distribution. These contribute greenhouse gas emissions, energy consumption, pollution air, water, soil. Additionally, waste, particularly single-use items, poses threat ecosystems wildlife, with marine environments being vulnerable. While is often promoted as solution mitigate the impact plastics, its effectiveness limited by factors. Challenges such contamination, inadequate infrastructure, low rates collection hinder potential benefits. Moreover, process itself can generate pollutants albeit lesser extent than primary production. Beyond concerns, implications use are increasingly recognized. Plastics contain additives phthalates bisphenols, which been linked endocrine disruption, reproductive issues, other problems humans wildlife. Furthermore, accumulation microplastics environment raises concerns about bioaccumulation transfer through food chain, for human health. Addressing requires multifaceted approach, including reduction improvement infrastructure technologies, development alternative materials, policy interventions promote sustainable practices. highlights complex interplay between usage, degradation, public health, underscoring need concerted efforts challenges.

Language: Английский

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Unexpected Energy Applications of Ionic Liquids

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(23)

Published: Feb. 27, 2024

Ionic liquids and their various analogues are without doubt the scientific sensation of last few decades, paving way to a more sustainable society. Their versatile suite properties, originating from an almost inconceivably large number possible cation anion combinations, allows tuning structure serve desired purpose. hence offer myriad useful applications solvents catalysts, through lubricants, gas absorbers, azeotrope breakers. The purpose this review is explore unexpected these applications, particularly in energy space. It guides reader application ionic as i) phase change materials for thermal storage, ii) organic plastic crystals, which have been studied battery electrolytes separation, iii) key components nitrogen reduction reaction ammonia generation, iv) aluminum-ion batteries, v) other emerging technologies. concluded that there tremendous scope further optimizing liquid its task, subject sustainability imperatives line with current global priorities, assisted by artificial intelligence.

Language: Английский

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Towards sustainable and ecofriendly polymer composite materials from bast fibers: a systematic review

Engineering Research Express, Journal Year: 2024, Volume and Issue: 6(1), P. 012501 - 012501

Published: Feb. 5, 2024

Abstract This systematic review focuses on the exploration and advancement of sustainable eco-friendly polymer composite materials derived from bast fibers. Bast fibers, obtained phloem certain plants like flax, hemp, jute, kenaf, represent a renewable environmentally benign resource. Their integration into based composites has gained significant attention due to growing environmental concerns need for material development. The importance this study lies in its comprehensive examination fibers as viable alternatives synthetic materials. By harnessing natural strength, light weight, biodegradability contributes creation that are not only but also possess enhanced mechanical properties suitable various industrial domestic applications.

Language: Английский

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Recycled and Upcycled Materials in Contemporary Architecture and Civil Engineering: Their Applications, Benefits, and Challenges

Cleaner Waste Systems, Journal Year: 2025, Volume and Issue: unknown, P. 100203 - 100203

Published: Jan. 1, 2025

Language: Английский

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Exploring Supply-Side Barriers for Commercialization of New Biopolymer Production Technologies: A Systematic Review

Sustainability, Journal Year: 2025, Volume and Issue: 17(3), P. 820 - 820

Published: Jan. 21, 2025

The development of new biopolymer production technologies is becoming increasingly relevant for tackling the negative impact linear plastics. Despite these potential benefits, their and commercialization still face several obstacles that might hinder widespread adoption. present systematic review aimed to offer a thorough analysis multi-level supply-side barriers across researchers, policymakers, industry professionals. Searches were performed in Web Science, SCOPUS, PubMed, IEEE Xplore between June July 2023. Publications 2019 2023 considered (n = 176). Content was coded following PICO structure results reported PRISMA checklist. We found technological knowledge most identified, followed by economic, regulatory, supply stability, behavioral challenges. Moreover, we 82% documents identified more than one barrier, reflecting complex interaction different challenges field. Fostering interdisciplinary collaboration, establishing clear regulatory frameworks, enhancing communication strategies are recommendations overcoming barriers. These findings draft multifaceted roadmap key new, sustainable technologies, carry significant implications future research, policy development, practices.

Language: Английский

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Bioinspired and Bioderived Aqueous Electrocatalysis

Chemical Reviews, Journal Year: 2022, Volume and Issue: 123(5), P. 2311 - 2348

Published: Nov. 10, 2022

The development of efficient and sustainable electrochemical systems able to provide clean-energy fuels chemicals is one the main current challenges materials science engineering. Over last decades, significant advances have been made in robust electrocatalysts for different reactions, with fundamental insights from both computational experimental work. Some most promising literature are based on expensive scarce platinum-group metals; however, natural enzymes show highest per-site catalytic activities, while their active sites exclusively earth-abundant metals. Additionally, biomass provides a valuable feedstock producing advanced carbonaceous porous hierarchical structures. Utilizing resources design inspiration nature can help create more cost-effective strategies manufacturing cost-effective, sustainable, devices. This review spans device engineering; we initially discuss carbon-based bioinspired features (such as enzyme sites), utilization construct tailored carbon materials, activity aqueous electrocatalysis water splitting, oxygen reduction, CO2 reduction. We then delve applicability devices, such engineering mass transport electrode interfaces. Finally, address remaining challenges, stability or metal-free new potential research directions that open gates implementation

Language: Английский

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