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Nano Research 2022年第7期15卷 6551-6567页

作者： Jizhou Jiang Saishuai Bai Jing Zou Song Liu Jyh-Ping Hsu Neng Li Guoyin Zhu Zechao Zhuang Qi Kang Yizhou Zhang School of Environmental Ecology and Biological Engineering School of Chemistry and Environmental EngineeringKey Laboratory of Green Chemical Engineering Process of Ministry of EducationEngineering Research Center of Phosphorus Resources Development and Utilization of Ministry of EducationWuhan Institute of TechnologyWuhan 430205China Key Laboratory of Rare Mineral Ministry of Natural ResourcesGeological Experimental Testing Center of Hubei ProvinceWuhan 430034China Institute of Chemical Biology and Nanomedicine(ICBN) State Key Laboratory of Chemo/Biosensing and ChemometricsCollege of Chemistry and Chemical EngineeringCollege of BiologyHunan UniversityChangsha 410082China Department of Chemical Engineering “National Taiwan University”Taipei 10617TaiwanChina State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China Institute of Advanced Materials and Flexible Electronics(IAMFE) School of Chemistry and Materials ScienceNanjing University of Information Science&TechnologyNanjing 210044China Department of Chemistry Tsinghua UniversityBeijing 100084China Department of Polymer Science and Engineering Shanghai Key Laboratory of Electrical Insulation and Thermal AgeingShanghai Jiao Tong UniversityShanghai 200240China

Due to their superior hydrophilicity and conductivity,ultra-high volumetric capacitance,and rich surface-chemistry properties,MXenes exhibit unique and excellent performance in catalysis,energy storage,electromagnetic shielding,and life *** they are derived from ceramics(MAX phase)through etching,one of the challenges in MXenes preparation is the inevitable exposure of metal atoms on their surface and embedding of anions and *** the as-obtained MXenes are always in a thermodynamically metastable state,they tend to react with trace oxygen or oxygen-containing groups to form metal oxides or degrade,leading to sharply declined activity and impaired ***,improving the stability of MXenesbased materials is of practical significance in relevant ***,there lacks a comprehensive review in the literature on relevant *** help promote the wide applications of MXenes,we review from the following aspects:(i)insights into the factors affecting the stability of MXenes-based materials,including oxidation of MXenes flakes,stability of MXenes colloidal solutions,and swelling and degradation of MXenes thin-film,(ii)strategies for enhancing the stability of MXenes-based materials by optimizing MAX phase synthesis and modifying the MXenes preparation,and(iii)techniques for further increasing the stability of freshly prepared MXenes-based materials via controlling the storage conditions,and forming shielding on the surface and/or edge of MXenes ***,some outlooks are proposed on the future developments and challenges of highly active and stable *** aim to provide guidance for the design,preparation,and applications of MXenes-based materials with excellent stability and activity.

关键词： MXenes stability oxidation swelling and degradation shielding strategies

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Rethinking Primary Particulate Matter: Integrating Filterable and Condensable Particulate Matter in Measurement and Analysis

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SSRN 2024年

作者： Le, Yen Thi-Hoang Kim, Dong-Woo Kang, Cheonwoong Park, Poong-Mo Jung, Yong-Won Jang, Kee-Won Youn, Jong-Sang Kang, Dae-Il Jeon, Ki-Joon Particle Pollution Research and Management Center Incheon21999 Korea Republic of Department of Environmental Engineering Inha University Incheon22212 Korea Republic of Air Pollution Engineering Division National Institute of Environmental Research Incheon22689 Korea Republic of Department of Energy and Environmental Engineering The Catholic University of Korea Bucheon14662 Korea Republic of Program on Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of Inha University Korea Republic of

The current definition of primary particulate matter (PM) encompasses filterable PM (FPM) and condensable PM (CPM), which are evaluated using two distinct conventional measurement methods: cooling and dilution. While the cooling method exclusively considers the homogenous formation of CPM, the dilution method, closer to real-world conditions, neglects FPM characterization. To overcome this limitation, we propose a doubled-dilution system that enables the parallel characterization of both FPM and primary PM without diverting FPM from the CPM formation pathway. The doubled-dilution system has been investigated from a laboratory scale to a full-scale coal-fired power plant to facilitate simultaneous, real-time measurements of primary PM and FPM size distributions. Moreover, the formation rates of homogeneous and heterogeneous nucleation were compared. The evolution of the primary PM size revealed a bimodal distribution, and the filter-based mass concentration results demonstrated a pronounced preference for heterogeneous reactions (17.6 times higher than homogeneous nucleation). In particular, primary PM emissions were underestimated by up to 65.3% when only homogeneous CPM formation was considered, underscoring the importance of including FPM during primary PM measurements. Considering these results, we advocate adopting the term "primary PM" over "CPM." © 2024, The Authors. All rights reserved.

关键词： Dilution

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Unleashing the Power of Nature: Eco-Friendly Mussel-Byssus-Inspired Pbs/Pbat Fishing Gear for Biodegradation by Marine Microbes

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SSRN 2023年

作者： Hong, Yuri Yang, Ho-Sung Lee, Min Hee Kim, Sinyang Park, Sung Bae Hwang, Sung Yeon Park, Jeyoung Koo, Jun Mo Oh, Dongyeop Hwang, Dong Soo Gyeongsangbuk-do Pohang37673 Korea Republic of Ulsan44429 Korea Republic of Department of Plant & Environmental New Resources Graduate School of Biotechnology Kyung Hee University Gyeonggi-do 17104 Korea Republic of Department of Chemical and Biomolecular Engineering Sogang University Seoul04107 Korea Republic of Department of Organic Materials Engineering Chungnam National University Daejeon34134 Korea Republic of Department of Polymer Science and Engineering and Program in Environmental and Polymer Engineering Inha University Incheon22212 Korea Republic of

Abstract Abandoned, lost, and discarded fishing gear (ALDFG) poses global challenges for marine ecosystems as they destroy algal forests, the largest oceanic carbon dioxide sinks. Biodegradable polybutylene succinate (PBS), which has a tensile toughness similar to that of nylon, has been suggested as a potential fishing-gear material. However, its slow degradation in the marine environment and limited draping characteristics need to be addressed before it can be used in environmentally friendly fishing gear. Inspired by the mussel byssus, a mussel-thread-like holdfast known for its stiff yet extensible mechanical properties, we developed fishing gear using a mussel-byssus-mimetic fiber (artificial byssus, AB) structure. The AB was composed of poly(butylene adipate-co-butylene terephthalate) (PBAT) fibers with favorable draping characteristics coated with mechanically resilient and PBS, which demonstrated sufficient toughness and draping properties for use in fishing gear. The AB may serve as fishing-gear material capable of mitigating ALDFG issues, given its marine degradability by microbial strains that degrade PBS and PBAT. Furthermore, it could serve as a substrate for ocean afforestation, given the improved settlement and growth of seaweed spores (Pyropia yezoensis) on AB. Overall, AB-based fishing gear is expected to enhance macroalgal forest conservation and expansion, and facilitate marine carbon capture through marine afforestation. © 2023, The Authors. All rights reserved.

关键词： Butenes

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A visible-light-driven CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst for high-performance rechargeable zinc-air batteries beyond 500 mW cm^(-2)

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Chinese Journal of Catalysis 2025年第1期68卷 300-310页

作者： Yang Zhang Nengneng Xu Bingbing Gong Xiaoxiao Ye Yi Yang Zhaodi Wang Biyan Zhuang Min Wang Woochul Yang Guicheng Liu Joong Kee Lee Jinli Qiao State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Environmental Science and EngineeringDonghua UniversityShanghai 201620China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China School of Chemical Engineering and Technology Xinjiang UniversityUrumqi 830017XinjiangChina School of Chemistry and Chemical Engineering Yancheng Institute of TechnologyYancheng 224051JiangsuChina Department of Physics Dongguk UniversitySeoul 04620Korea School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China Department of Chemical&Biochemical Eng Gachon UniversitySeongnam-si 13120Korea

Storing solar energy in battery systems is crucial to achieving a green and sustainable ***,the efficient development of photo-enhanced zinc-air batteries(ZABs)is limited by the rapid recombination of photogenerated carriers on the *** this work,the visible-light-driven CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst with unique petal-like layer structure was designed and developed,which can be used as air electrode for visible-light-driven *** superior performance of ZABs assembled by CoS_(2)/CuS@CNT-C_(3)N_(4)was mainly attributed to the successful construction of Schottky heterojunction between g-C_(3)N_(4)and carbon nanotubes(CNTs),which accelerates the transfer of electrons from g-C_(3)N_(4)to CoS_(2)/CuS cocatalysts,improves the carrier separation ability,and extends the carrier ***,the visible-driven ZABs assembled by CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst has a power density of 588.90 mW cm^(-2) and a charge-discharge cycle of 643 h under visible light irradiation,which is the highest performance ever reported for photo-enhanced *** importantly,the charge-discharge voltage drop of ZABs was only 0.54 V under visible light irradiation,which is significantly lower than the voltage drop(0.94 V)in the *** study provides a new idea for designing efficient and stable visible-light-driven ZABs cathode catalysts.

关键词： Visible-light-driven CoS_(2)/CuS@CNT-C_(3)N_(4)photocatalyst Zinc-air battery Heterojunction Photogenerated carriers

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Hydrogel-based materials as antibacterial agents and super adsorbents for the remediation of emerging pollutants:A comprehensive review

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Emerging Contaminants 2024年第3期10卷 46-67页

作者： Shabnam Ahmadi Sina Pourebrahimi Alhadji Malloum Majid Pirooz Christian Osagie Soumya Ghosh Muhammad Nadeem Zafar Mohammad Hadi Dehghani Department of Environmental Health Engineering Faculty of Medical SciencesTarbiat Modares UniversityPO Box 14115-111TehranIran Department of Chemical and Materials Engineering Concordia University7141 Sherbrooke Street WestMontrealQuebecH4B 1R6Canada Department of Physics Faculty of ScienceUniversity of MarouaPO Box 46MarouaCameroon Department of Chemistry University of the Free StatePO Box 3399300BloemfonteinSouth Africa Research and Development Division Pad Jam Polymer Development Company(PJPC)and Department of Chemical EngineeringUniversity of Isfahan81746-73441IsfahanIran Stochastics and Its Applications Brandenburg University of Technology Cottbus-SenftenbergPlatz der Deutschen Einheit 103046CottbusGermany Natural and Medical Sciences Research Center University of NizwaNizwa616Oman Department of Chemistry University of Gujrat50700GujratPakistan Department of Environmental Health Engineering School of Public HealthTehran University of Medical SciencesTehranIran Center for Solid Waste Research Institute for Environmental ResearchTehran University of Medical SciencesTehranIran

Hydrogels have various potential applications due to their unique characteristics and recently,hydrogels have been utilized as adsorbents in wastewater treatment because of their ability to remove contaminants from *** strong hydrogels with high adsorption capabilities is crucial for effective wastewater *** and researchers are working to improve the properties of hydrogels by incorporating inorganic elements into polymer networks,which further reduces the costs as well as simplifies their *** polymers like starch and alginate are widespread due to their economic and biological advantages,such as biodegradability,biocompatibility,reduced toxicity,environmental friendliness,and low *** adsorption of pollutants onto hydrogels as well as their use as antimicrobial agents has garnered significant *** review paper summarizes the latest studies on using hydrogels as adsorbents to remove endocrine-disrupting chemicals(EDCs),persistent organic pollutants(POPs),and other emerging pollutants from water environments along with their use as antimicrobial *** the first step,different classes of hydrogels and different characterization techniques have been *** antimicrobial potential of hydrogels is elaborated to understand how these hydrogels can be a potential candidate for such *** discussing the adsorption application of hydrogels,different isothermal,kinetics and thermodynamics models have been discussed to highlight the mechanism and nature of forces involved in adsorption of *** different simulations such as DFT and MD have been discussed to get more holistic understanding of pollutants adsorption onto hydrogels.A limited number of studies have utilized other techniques such as Monte Carlo simulations and computational fluid dynamics(CFD)so it is important to explore a variety of computational methods to gain a comprehensive understanding of the adsorption process o

关键词： Hydrogel Emerging pollutant Adsorption Water and wastewater Monte Carlo simulations Antimicrobial activity

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Selective Pb^(2+) removal and electrochemical regeneration of fresh and recycled FeOOH

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Nano Research 2023年第7期16卷 9352-9363页

作者： Lei Wang Lexane Deligniere Samantha Husmann Regina Leiner Carsten Bahr Shengjie Zhang Chaochao Dun Matthew M.Montemore Markus Gallei Jeffrey J.Urban Choonsoo Kim Volker Presser INM—Leibniz Institute for New Materials Campus D22Saarbrücken 66123Germany Department of Materials Science and Engineering Saarland UniversityCampus D22Saarbrücken 66123Germany Polymer Chemistry Saarland UniversityCampus C42Saarbrücken 66123Germany 4 GEH Wasserchemie GmbH&Co.KGAdolf-Köhne-Straße Osnabrück 49090 Germany Department of Chemical and Biomolecular Engineering Tulane UniversityNew OrleansLA 70118USA The Molecular Foundry Lawrence Berkeley National Laboratory BerkeleyBerkeleyCA 94720USA Saarene-Saarland Center for Energy Materials and Sustainability Campus C42Saarbrücken 66123Germany Department of Environmental Engineering with Institute of Energy/Environment Convergence Technologies Kongju National University1223-24 Cheonan-daeroCheonan-si 31080Republic of Korea Department of Future Convergence Engineering Kongju National University1223-24 Cheonan-daeroCheonan-si 31080Republic of Korea

Heavy metal pollution is a key environmental *** extracting heavy metals could accomplish water purification and resource recycling *** is a promising approach with a facile process,adaptability for the broad concentration of feed water,and high ***,the adsorption method faces challenges in synthesizing highperformance sorbents and regenerating adsorbents *** is an environmentally friendly sorbent with low-cost production on a large ***,the selectivity behavior and regeneration of FeOOH are seldom ***,we investigated the selectivity of FeOOH in a mixed solution of Co^(2+),Ni^(2+),and Pb^(2+)and proposed to enhance the capacity of FeOOH and regenerate it by using external *** charge,the FeOOH electrode shows a Pb^(2+)uptake capacity of 20 mg/*** applying a voltage of-0.2/+0.8 V,the uptake capacity increases to a maximum of 42 mg/g and the desorption ratio is 70%-80%.In 35 cycles,FeOOH shows a superior selectivity towards Pb^(2+)compared with Co^(2+)and Ni^(2+),with a purity of 97%±3%in the *** high selectivity is attributed to the lower activation energy for Pb^(2+)*** capacity retentions at the 5^(th)and the 35^(th)cycles are ca.80%and ca.50%,respectively,comparable to the chemical regeneration *** industrially exhausted granular ferric hydroxide as the electrode material,the system exhibits a Pb^(2+)uptake capacity of 37.4 mg/g with high *** work demonstrates the feasibility of regenerating FeOOH by charge and provides a new approach for recycling and upcycling FeOOH sorbent.

关键词： FeOOH electrochemical regeneration selective separation heavy metal ions

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Mechanistic Study on Hydrogen Effects in Propylene polymerization with Mgcl2-Supported Ziegler-Natta Catalysts: New Evidences from Active Center Counting and Reaction Kinetics

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SSRN 2023年

作者： Hu, Jie Shen, Xianrong Fu, Zhisheng Wang, Qi Fan, Zhiqiang MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and Engineering Zhejiang University Hangzhou310027 China School of Chemical and Environmental Engineering Anhui Polytechnic University Wuhu241000 China

Propylene polymerizations catalyzed by MgCl2/Di/TiCl4-AlEt3/siloxane in the absence and presence of hydrogen were studied by determining the time-dependent changes of catalytic activity, number of active centers and active center distribution. Three types of active centers with high, medium and very low stereoselectivity were differentiated by fractionating the polymer into three parts. Chain propagation rate constant of each type of active centers was estimated by linear fitting/extrapolating the time-dependent change of apparent propagation rate constant. The centers with high (Ci*), medium (Cm*) and low (Ca*) stereoselectivity responded to addition of hydrogen differently. Adding hydrogen caused marked increase of Ci*, but its propagation rate constant (kpi) was evidently reduced. In contrast, numbers of Cm* and Ca* were only slightly affected, but their propagation rate constants were evidently enhanced by hydrogen. The different hydrogen responses of Ci* with those of Cm* and Ca* were explained by two kinds of hydrogen activation mechanisms. © 2023, The Authors. All rights reserved.

关键词： Hydrogen

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Effect of Polyisoprene Microstructure on the Thermodynamics, Viscoelastic, and Dielectric Properties in the Bulk and during Flow in Nanopores

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Macromolecules 2025年第12期58卷 6052-6065页

作者： Panagiotis Kardasis Michail Danikas Nikolaos Patelis Konstantinos Ntetsikas Nikos Hadjichristidis George Floudas Department of Physics University of Ioannina 45110 Ioannina Greece Polymer Synthesis Laboratory Chemistry Program KAUST Catalysis Center Physical Sciences and Engineering Division King Abdullah University of Science and Technology (KAUST) Thuwal 23955 Saudi Arabia Department of Physics University of Ioannina 45110 Ioannina Greece；Max Planck Institute for Polymer Research Ackermannweg 10 55128 Mainz Germany；University Research Center of Ioannina (URCI)─Institute of Materials Science and Computing 45110 Ioannina Greece

We report the effect of polyisoprene (PI) microstructure on the thermodynamics, viscoelasticity, and molecular dynamics, the latter via dielectric spectroscopy in bulk and during flow in cylindrical nanopores. A series of monodisperse PIs with microstructurescis-1,4,trans-1,4, 3,4, and 1,2 are synthesized via anionic polymerization using high-vacuum techniques using polar additives. In thermodynamics, we show that the liquid-to-glass temperature (Tg) decreases linearly with 1,4 units content asTg[K] = (289 ± 4)–0.9 ×w1,4%, whereas it increases quadratically with 3,4-units content asTg=Tg0%+(w3,4%)250[K]. Scaling of specific heats,cpglass,cpliquid,Tg, and the increment in specific heat atTg(Δcp) are established as a function of microstructure. In rheology, the zero-shear viscosity scales as η0= η0%×w1,4%–u, whereu= 5.4 ± 0.3. Despite this, the plateau modulus is independent of microstructure. All dielectrically active processes are strongly affected by microstructure. The dielectric strength of the β- and α-processes increases strongly with increasing 3,4-unit content, whereas that of the chain mode decreases precipitously. The calculated component of dipole moment along the polymer backbone scales with microstructure as μcis–1,4> μtrans–1,4> μ1,2> μ3,4≈ 0. The β-process shifts withTgand has characteristics of a Johari–Goldstein process with activation energies predicted by the coupling model. Lastly, we show that it is possible to separate blend components comprising different microstructures by the way of penetration within cylindrical nanopores, giving another example of what is known as “topology sorting.”

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Influence of magnesium and calcium sulfate whisker on crystallization characteristics of poly (butylene adipate-co-terephthalate) and Poly(butylene succinate)

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Journal of Reinforced Plastics and Composites 2024年

作者： Mao, Hsu-I Liu, Shu-Hui Chu, Jui-Ching Shiu, Jia-Wei Chen, Pei-Yin Chen, Chin-Wen Department of Molecular Science and Engineering Institute of Organic and Polymeric Materials Research and Development Center of Smart Textile Technology National Taipei University of Technology Taipei Taiwan Climate Change Research Center National Environmental Research Academy Taoyuan Taiwan Division of Polymer Research Material and Chemical Research Laboratories Department of Polymer Processing Industrial Technology Research Institute Hsinchu Taiwan

Inorganic fillers of whisker-like morphology are considered promising materials, and they have gained significant attention in recent years as a substitute for glass fibers due to their fibrous surface characteristics and extremely low bulk density. This study selected magnesium sulfate whiskers (MSWs) containing crystal water and pure calcium sulfate whiskers (CSWs) as fillers. They were physically blended with biodegradable polymers PBAT and PBS in a range of 0.1 wt.% to 2 wt.% to form composite materials. The non-isothermal crystallization behavior of the composite materials was studied using differential scanning calorimetry (DSC). The data indicated that with an increase in whisker content, the crystallization temperature (Tc) of composites increased, and the addition of a small amount of whiskers led to a reduction in the half-crystallization time of the composite materials, indicating the crystallization capacity of the materials has been enhanced to varying degrees. Analysis via POM unveiled a consistent pattern of decreased spherulite size and heightened spherulite count with the introduction of whiskers. This phenomenon is ascribed to the whisker fillers’ function as nucleating agents within the polymer matrices, thereby stimulating the crystallization process. Interestingly, the findings suggest that CSWs exert a more significant influence on crystallization than MSWs, likely due to the distinct single fiber morphology of the former filler. © The Author(s) 2024.

关键词： Sulfur compounds

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Electrospun Aligned PCL/Gelatin Scaffolds Mimicking the Skin ECM for Effective Antimicrobial Wound Dressings

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Advanced Fiber Materials 2023年第1期5卷 235-251页

作者： Erfan Rezvani Ghomi Rajamani Lakshminarayanan Vijila Chellappan Navin Kumar Verma Amutha Chinnappan Rasoul Esmaeely Neisiany Kottaiswamy Amuthavalli Zhi Sheng Poh Brandon Han Siang Wong Nileshkumar Dubey Roger Narayan Seeram Ramakrishna Department of Mechanical Engineering Center for Nanotechnology and SustainabilityNational University of SingaporeSingapore 117581Singapore Ocular Infections and Antimicrobials Research Group Singapore Eye Research InstituteThe Academia20 College RoadDiscovery TowerSingapore 169856Singapore Institute of Materials Research and Engineering(IMRE) Agency for Science Technology and Research(A*STAR)#08‑032 Fusionopolis WayInnovisSingapore 138634Singapore Lee Kong Chian School of Medicine Nanyang Technological University SingaporeClinical Sciences Building11 Mandalay RoadSingapore 308232Singapore Department of Pharmacy National University of Singapore18 Science Drive 4Singapore 117543Singapore Academic Clinical Program in Ophthalmology and Visual Sciences Academic Clinical Program Duke-NUS Medical SchoolSingapore 169857Singapore National Skin Centre 1 Mandalay RoadSingapore 308205Singapore Department of Materials and Polymer Engineering Faculty of EngineeringHakim Sabzevari UniversitySabzevar ***Iran Faculty of Dentistry National University of SingaporeSingapore 119085Singapore ORCHIDS:Oral Care Health Innovations and Designs Singapore National University of SingaporeSingaporeSingapore 119085Singapore Department of Biomedical Engineering University of North Carolina at Chapel HillChapel HillNC 27514USA

Bacterial infections and multidrug-resistant bacteria are major health burdens in wound *** antimicrobial agents,e.g.,ε-polylysine(ε-PL),provide a broad spectrum of antibacterial properties and support dermal cell ***,ε-PL was incorporated into polycaprolactone(PCL)/gelatin electrospun scaffolds collected at varying rotation ***,the samples were crosslinked using dopamine hydrochloride to provide highly proliferative dressings with broad antimicrobial *** morphological study showed that the electrospun wound dressings were smooth,continuous,and bead-free,with a mean diameter ranging from 267±7 to 331±8 nm for all random and aligned *** fiber alignment of the electrospun PCL/gelatin scaffolds improved their tensile strength and ***,nanofiber mats are highly hydro-philic,which is crucial for an efficient wound *** samples also demonstrated high antimicrobial properties against common wound bacterial strains,including methicillin-resistant Staphylococcus aureus(MRSA),Staphylococcus aureus(SA),Escherichia coli(EC),Acinetobacter baumannii(AB),and Pseudomonas aeruginosa(PA).Mammalian cell prolifera-tion and morphology assays involving primary human dermal fibroblasts(hDFs)and immortalized keratinocytes(HaCaT)showed excellent biocompatibility of the electrospun mats and remarkably aligned ***,aligned mats showed more cell migration than randomly oriented mats,which is desirable for more efficient wound ***,it can be concluded that aligned PCL/gelatin mats containingε-PL are promising for potential use in wound dressings.

关键词： Electrospinning Wound healing Fiber alignment Biomaterials Nanofiber dressing Bacterial infections

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