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Photocatalytic bio-inspired PDA-RGO/g-C3N4 nanocomposite incorporated PES membrane for removal of environmental antibiotic pollutants

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Journal of Chemical Technology and Biotechnology 2024年第6期99卷 1401-1413页

作者： Govardhanan, B. GokulaKrishnan, S.A. Arthanareeswaran, G. Ashok, M. Chen, Yong-Song Taweepreda, W. Membrane Research Laboratory Department of Chemical Engineering National Institute of Technology Tiruchirappalli Tiruchirappalli India New Generation Materials lab Department of Physics National Institute of Technology Tiruchirappalli Tiruchirappalli India Department of Mechanical Engineering and Advanced Institute of Manufacturing with High-tech Innovations National Chung Cheng University Chiayi County Taiwan Polymer Science Program Division of Physical Science Faculty of Science Prince of Songkla University Hat-Yai Thailand

BACKGROUND: Membrane technology makes it more suitable for the treatment of environmental polluted organic wastewater. Membrane fouling is one of the major concerns in commercial membranes. To overcome this issue, photocatalytic nanomaterials are embedded into the membrane to enhance its surface nature and reusability. In this investigation, polydopamine functionalized graphene oxide (PDA-RGO), graphite carbon nitride (g-C3N4) and PDA-RGO/g-C3N4 nanomaterials were incorporated within polyethersulfone membrane fabricated via a phase inversion technique. These as-prepared membranes’ functional groups and surface morphologies were investigated by Fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM) and field emission electron microscopy (FESEM). These as-prepared membranes were investigated for photocatalytic activity under visible-light-driven photodegradation by environmental pollutants such as Rhodamine B (RhB) and Norfloxacin (NOR). RESULTS: Compared with pristine PES membrane, the PDA-RGO/g-C3N4-PES nanocomposite membrane showed higher photocatalytic activity for Rhodamine B 94.6% and Norfloxacin 96.8%, also reached greater water flux 189 L m−2 h−1. Therefore, the bio-inspired nanocomposite-modified PDA-RGO/g-C3N4 photocatalytic membrane could have huge potential in processing environmentally polluted water. CONCLUSIONS: PDA-RGO/g-C3N4-PES nanocomposite membrane improved the membrane hydrophilicity, water flow, anti-fouling performance, rejection studies and photocatalytic degradation than the pristine membrane. The synergistic result of PDA-RGO and g-C3N4 exhibits better photodegradation efficiency of the membrane towards environmental pollutants. © 2024 Society of Chemical Industry (SCI). © 2024 Society of Chemical Industry (SCI).

关键词： Nanocomposites

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Sensitivity improvement of fluoroalkylated EUV resist with electron-rich vinyl units 41

Sensitivity improvement of fluoroalkylated EUV resist with e...

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Advances in Patterning Materials and Processes XLI 2024

作者： Kim, Gayoung Ku, Yejin Lee, Jin-Kyun Kim, Jiho Park, Byeong-Gyu Lee, Sangsul Jang, Yu Ha Jung, Byung Jun Koh, Chawon Nishi, Tsunehiro Kim, Hyun-Woo Program in Environment and Polymer Engineering Inha University Incheon22212 Korea Republic of Department of Polymer Science and Engineering Inha University Incheon22212 Korea Republic of Pohang Accelerator Laboratory Postech Pohang37673 Korea Republic of Department of Materials Science and Engineering University of Seoul Seoul02504 Korea Republic of Samsung Electronics Co. Ltd. Semiconductor R&d Center Suwon18448 Korea Republic of Department of Materials Science and Engineering Yonsei University Seoul03722 Korea Republic of

ISBN: (纸本)9781510672208

In this study, we present a method to enhance the sensitivity of fluorinated EUV resists by leveraging the rapid coupling reaction between electrophilic carbon radicals and electron-rich alkenes. To validate the impact of the vinyl groups, DVS-HNF was synthesized by introducing fluorinated alkyl chains and silyl vinyl functional groups into the model compound. Additionally, TMS-HNF and EDMS-HNF, which do not contain a vinyl moiety, were synthesized for comparison. To evaluate the patterning properties of the three materials, e-beam lithography experiments were conducted, resulting in the formation of negative-tone patterns for all three materials. Comparing sensitivities, DVS-HNF with two vinyl moieties exhibited the most excellent sensitivity, confirming the effective collaboration between fluorinated alkyl radicals and vinyl groups. After performing an EUV lithography experiment on DVS-HNF, it was confirmed that a 30 nm negative-tone pattern was successfully formed with excellent sensitivity. These results substantiate the potential of the single-component molecular resist for high performance EUV lithography. © COPYRIGHT SPIE. Downloading of the abstract is permitted for personal use only.

关键词： Extreme ultraviolet lithography

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Assembly of exfoliated α-zirconium phosphate nanosheets:Mechanisms and versatile applications

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Aggregate 2022年第4期3卷 41-60页

作者： Hao Ding Abbas Ahmed Kuangyu Shen Luyi Sun Polymer Program Institute of Materials ScienceUniversity of ConnecticutStorrsConnecticutUSA Department of Chemical and Biomolecular Engineering University of ConnecticutStorrsConnecticutUSA Department of Biomedical Engineering University of ConnecticutStorrsConnecticutUSA

α-Zirconium phosphate(Zr(HPO_(4))_(2)⋅H_(2)O,α-ZrP)is an inorganic layered *** the first report of crystallineα-ZrP in 1964,thanks to its simple synthesis and unique physiochemical properties,α-ZrP has found widespread application in many fields including mechanical reinforcing,barrier improvement,flame retardancy,anticorrosion,catalysis,environment,energy,and *** of the ease of exfoliation ofα-ZrP to obtain single-layer nanosheets,as well as its rich surface chemistry thanks to the high density of orderly arranged surface acidic hydroxyl groups,α-ZrP single-layer nanosheets are ideal building blocks for self-assembly or assembly with other *** assembly ofα-ZrP nanosheets could form a randomly dispersed structure(isotropic),roughly ordered structure(nematic),or highly ordered structure(smectic)within liquid colloids or solid hybrids(including hydrogels).Thanks to the combination of the unique structures and the novel functions of the components,the assembled materials have found a wide verity of applications due to their excellent *** this article,the methods to synthesizeα-ZrP,the approaches and mechanisms to exfoliateα-ZrP,and the strategies to assembleα-ZrP nanosheets to form various structures,as well as the applications of the assembled materials are *** emerging prospects ofα-ZrP nanosheets as a key material in next-generation functional applications are envisioned.

关键词： application assembly exfoliation nanosheets α-zirconium phosphate

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Nanofiber Materials for Lithium‑Ion Batteries

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Advanced Fiber Materials 2023年第4期5卷 1141-1197页

作者： Xinwang Cao Chang Ma Lei Luo Lei Chen Hui Cheng Raphael Simha Orenstein Xiangwu Zhang National Engineering Laboratory for Advanced Yarn and Fabric Formation and Clean Production College of Textiles Science and EngineeringWuhan Textile UniversityWuhan 430200China Tianjin Municipal Key Lab of Advanced Fiber and Energy Storage Technology Tiangong UniversityTianjin 300387China Fiber and Polymer Science Program Department of Textile EngineeringChemistry and ScienceWilson College of TextilesNorth Carolina State UniversityRaleighNC 27695USA

The lithium-ion(Li-ion)battery has received considerable attention in the field of energy conversion and storage due to its high energy density and *** academic and commercial progress has been made in Li-ion battery *** area of advancement has been the addition of nanofiber materials to Li-ion batteries due to their unique and desirable structural features including large aspect ratios,high surface areas,controllable chemical compositions,and abundant composite *** the past few decades,considerable research efforts have been devoted to constructing advanced nanofiber materials possessing conductive networks to facilitate efficient electron transport and large specific surface areas to support catalytically active sites,both for the purpose of boosting electrochemical ***,we focus on recent advancements of nanofiber materials with carefully designed structures and enhanced electrochemical properties for use in Li-ion *** synthesis,structure,and properties of nanofiber cathodes,anodes,separators,and electrolytes,and their applications in Li-ion batteries are *** research challenges and prospects of nanofiber materials in Li-ion battery applications are delineated.

关键词： Nanofiber Lithium-ion battery Cathode Anode Separator Electrolyte

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Trefoil-shaped metallacycle and metallacage via heteroleptic self-assembly

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Chinese Chemical Letters 2023年第12期34卷 209-214页

作者： Zhilong Jiang He Zhao Jun Wang Bangtang Chen Wenzhi Lv Yiming Li Qiangqiang Dong Die Liu Weiya Liu Min Wang Fan Fu Seok-Ho Hwang Mingzhao Chen Pingshan Wang Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou Key Laboratory for Clean Energy and MaterialsGuangzhou UniversityGuangzhou 510006China Department of Organic and Polymer Chemistry Hunan Key Laboratory of Micro&Nano Materials Interface ScienceCollege of Chemistry and Chemical EngineeringCentral SouthUniversityChangsha 410083China College of Chemistry and Chemical Engineering Qiannan Normal University for NationalitiesDuyun 558000China Materials Chemistry Engineering Laboratory Department of Polymer Science&EngineeringDankook UniversityYonginGyeonggi-do 16890South Korea

Template-oriented multi-component synthesis method has been proven to be an exceedingly reasonable and excellent method for the synthesis of giant two-dimensional(2D)and three-dimensional(3D)supramolecules,but designing and constructing heteroleptic and controllable self-assembly without unexpected by-products remains a *** we report two discrete trefoil-shaped metallacycle S1 and metallacage s2 by heteroleptic self-assembly using one hexaphenylbenzene core ligand and two capping *** 2D trefoil-shaped metallacycle S1 could resemble the emblem of the classic'Mitsubishi *** use of template-oriented ligand and bent spacer ligand promotes the quantitative formation of the desired 3D trefoil-shaped metallacage *** formed metallacage S2 possesses a molecular weight up to 36 kDa,diameter 6.6 nm and height 3.0 *** supramolecular coordination complexes were fully characterized by NMR spectroscopy(^(1)H NMR,2D COSY,2D NOESY,2D DOSY),high-resolution electrospray ionization mass sectrometry ***-TWIM-MS,TEM and AFM.

关键词： Supramolecular coordination complex ‘Mitsubishi'molecule Trefoil-shaped metallacage Heteroleptic self-assembly Terpyridine

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Inverse Hall-Petch effect in nanocrystalline ice predicted by machine-learned coarse-grained molecular simulations

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Journal of Micromechanics and Molecular Physics 2023年第1期8卷 1-10页

作者： Chen, Guang Tao, Lei Kröger, Martin Li, Ying Department of Mechanical Engineering University of Connecticut Storrs 06269 CT United States Department of Materials Polymer Physics Eth Zürich Zürich CH-8093 Switzerland Department of Mechanical Engineering Institute of Materials Science University of Connecticut Storrs 06269 CT United States Polymer Program Institute of Materials Science University of Connecticut Storrs 06269 CT United States

We study the grain-size effect on mechanical behaviors of polycrystalline ice at nanoscale through large-scale molecular dynamics simulations, enabled by an accurate and efficient machine-learned coarse-grained water model [H. Chan, M. J. Cherukara, B. Narayanan, T. D. Loeffler, C. Benmore, S. K. Gray and S. K. Sankaranarayanan. Machine learning coarse grained models for water. Nature Communications 10(1), p. 379, 2019]. Polycrystalline ice systems with different grain sizes in the range of 5∼30 nm are systematically investigated through uniaxial tensile tests. Simulation results reveal that Young's modulus and yield strength increase as the grain size increases, leading to an inverse Hall-Petch effect in nanocrystalline ice. Such an observation is significantly different from the conventional Hall-Petch effect in polycrystalline ice observed by experiments at millimeter scale. The deformation behavior suggests that grain boundaries (GBs), rather than grain interiors, play the active role in accommodating external loading in nanocrystalline ice. Further void analysis of nanocrystalline ice during deformation reveals that nanocrack initiates and propagates along GBs and eventually leads to failure of systems with larger grain sizes (≥20nm), yielding a sudden drop in the stress-strain curve. While for systems with smaller grain sizes (≤15nm), only extensive plastic deformation is presented without significant void growth. Our simulation results demonstrate that the GB sliding is the governing mechanism for the inverse Hall-Petch effect observed in nanocrystalline ice. © 2023 World Scientific Publishing Company.

关键词： grain boundary inverse Hall-Petch effect molecular dynamics simulation Polycrystalline ice water model

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Positive-tone Tin-oxo Nanoclusters for Extreme UV lithography 42

Positive-tone Tin-oxo Nanoclusters for Extreme UV lithograph...

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Advances in Patterning Materials and Processes XLII

作者： Kim, Gayoung Ku, Yejin Jeon, Subin Lee, Jin-Kyun Lee, Seohyun Jung, Byung Jun Lee, Sung-Il Ryu, Choonghan Park, Kangho Jung, Yun Lim Jeong, Changyoung Choi, Jin Program in in Environment and Polymer Engineering Inha University Incheon22212 Korea Republic of Program in Semiconductor Convergence Inha University Incheon22212 Korea Republic of Department of Polymer Science and Engineering Inha University Incheon22212 Korea Republic of Department of Materials Science and Engineering University of Seoul Seoul02504 Korea Republic of Samsung Electronics Co. Ltd. Semiconductor R&D Center Suwon18448 Korea Republic of

ISBN: (纸本)9781510686427

In this study, we propose a strategy to achieve positive metal oxide resists (pMORs) based on tin-oxo nanoclusters (TOCs) for extreme ultraviolet (EUV) lithography in high-performance semiconductor integrated circuit manufacturing. TOC possesses Lewis acidic properties and becomes more strongly acidic upon ligand dissociation when exposed to high-energy radiation, such as electron beam (e-beam) and EUV. During the subsequent development process using an aqueous solution of tetramethylammonium hydroxide (TMAH), a Lewis base, the exposed regions undergo Lewis acid-base interactions, leading to increased hydrophilicity. Ultimately, this results in enhanced solubility, enabling the formation of positive-tone patterns. To address the limitations of TOCs, particularly in terms of process margin and chemical stability, we mixed TOCs with small organic molecules containing phenolic hydroxyl groups, which act as Lewis bases. This modification effectively mitigated the shortcomings of TOCs. A TOC formulation containing 10% dendritic polyphenol (DPP) exhibited an improved dissolution contrast while simultaneously enhancing chemical stability. Using this in EUV lithography, we successfully achieved high resolution positive-tone patterns with a line width of 13 nm. © 2025 SPIE.

关键词： Extreme ultraviolet lithography

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Electrochemical improvement of methane production via surface engineering of graphitic cathodes in anaerobic sequential batch reactors

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Journal of environmental Management 2025年 387卷 125826页

作者： Dash, Smruti Ranjan Choi, Hyungmin Song, Jae Keun Ko, Dayoung Lee, Changsoo Kim, Jeonghwan Department of Environmental Engineering Program of Environmental and Polymer Engineering Inharo-100 Michuhol-gu Incheon Korea Republic of Ulsan44919 Korea Republic of Ulsan44919 Korea Republic of

Five anaerobic sequential batch reactors (SBR), SBR 1−SBR 5 run in parallel were examined for biogas output trends under varying hydraulic retention times (HRT). SBR 1 was run without biomass for 1 month to study electrode stability and the effect of applied potential on sodium dodecyl sulfate (SDS) degradation. Polyaniline (PANI/Graphite) modification in reactors SBR 4 and iron-coated PANI (Fe-PANI/Graphite) in SBR 5 increased biogas production by almost 2.5 times compared to SBR 2 without electrodes. SBR 3 equipped with unmodified graphite rods was used as a control for cathode modifications. By decreasing HRT, cumulative methane production increased to 280 and 320 mL at 72 h and 350 and 500 mL at 48 h. Compared to SBR 2, an electric field increased daily biogas production. Methane composition in SBR 5 increased from 44% at 96-h to 71% at 48-h HRT after 30 days. SBR 4 recovered within 7 days after HRT modifications reduced methane output. The methane yield increased significantly with electric current in SBR 3 (2.6 times), SBR 4 (5.4 times), and SBR 5 (7.4 times). The effluent total organic carbon was stabilized at 15 mg/L for SBR 2 and SBR 3 and improved to below 5 mg/L for SBR 4 and SBR 5 during reactor operation. SBR 5, equipped with an Fe-PANI/Graphite cathode showing the lowest charge transfer resistance, developed distinct microbial community structures in both anodic and cathodic biofilms, compared to the other electrically assisted SBRs. © 2025 Elsevier Ltd

关键词： Anaerobic sequential batch reactors Bio-electrochemical system Biogas production Cathode modification Electric field application

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Block Sequence Effects on the Self-Assembly Behaviors of Polypeptide-Based Penta-Block Copolymer Hydrogels

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ACS Applied Materials and Interfaces 2024年第5期16卷 6674-6686页

作者： Wang, Ke-Hsin Liu, Chung-Hao Tan, Dun-Heng Nieh, Mu-Ping Su, Wei-Fang Department of Materials Science and Engineering National Taiwan University No. 1 Sec. 4 Roosevelt Road Taipei10617 Taiwan Polymer program Institute of Materials Science University of Connecticut 25 King Hill Road Unit 3136 StorrsCT06269-3136 United States Department of Chemical and Biomolecular Engineering University of Connecticut StorrsCT06269 United States Department of Materials Engineering Ming-Chi University of Technology 84 Gungjuan Rd. New Taipei City243303 Taiwan

Peptide-based hydrogels have great potential for applications in tissue engineering, drug delivery, and so on. We systematically synthesize, characterize, and investigate the self-assembly behaviors of a series of polypeptide-based penta-block copolymers by varying block sequences and lengths. The copolymers contain hydrophobic blocks of poly(γ-benzyl-l-glutamate) (PBG, Bx) and two kinds of hydrophilic blocks, poly(l-lysine) (PLL, Ky) and poly(ethylene glycol) (PEG, EG34), where x and y are the number of repeating units of each block, where PBG and PLL blocks have unique functions for nerve regeneration and cell adhesion. It shows that a sufficient length of the middle hydrophilic segment capped with hydrophobic end PBG blocks is required. They first self-assemble into flower-like micelles and sequentially form transparent hydrogels (as low as 2.3 wt %) with increased polymer concentration. The hydrogels contain a microscale porous structure, a desired property for tissue engineering to facilitate the access of nutrient flow for cell growth and drug delivery systems with high efficiency of drug storage. We hypothesize that the structure of Bx-Ky-EG34-Ky-Bx agglomerates is beyond micron size (transparent), while that of Ky-Bx-EG34-Bx-Ky is on the submicron scale (opaque). We establish a working strategy to synthesize a polypeptide-based block copolymer with a wide window of sol-gel transition. The study offers insight into rational polypeptide hydrogel design with specific morphology, exploring the novel materials as potential candidates for neural tissue engineering. © 2024 The Authors. Published by American Chemical Society

关键词： Block copolymers

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End-to-end differentiability and tensor processing unit computing to accelerate materials’ inverse design

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npj Computational Materials 2023年第1期9卷 1072-1083页

作者： Han Liu Yuhan Liu Kevin Li Zhangji Zhao Samuel S.Schoenholz Ekin D.Cubuk Puneet Gupta Mathieu Bauchy SOlids inFormaTics AI-Laboratory(SOFT-AI-Lab) College of Polymer Science and EngineeringSichuan UniversityChengdu 610065China AIMSOLID Research Wuhan 430223China Physics of AmoRphous and Inorganic Solids Laboratory(PARISlab) Department of Civil and Environmental EngineeringUniversity of CaliforniaLos AngelesCA 90095USA Department of Computer Science University of CaliforniaLos AngelesCA 90095USA Google Research Brain TeamMountain ViewCAUSA Department of Electrical and Computer Engineering University of CaliforniaLos AngelesCA 90095USA

Numerical simulations have revolutionized material ***,although simulations excel at mapping an input material to its output property,their direct application to inverse design has traditionally been limited by their high computing cost and lack of ***,taking the example of the inverse design of a porous matrix featuring targeted sorption isotherm,we introduce a computational inverse design framework that addresses these challenges,by programming differentiable simulation on TensorFlow platform that leverages automated end-to-end *** to its differentiability,the simulation is used to directly train a deep generative model,which outputs an optimal porous matrix based on an arbitrary input sorption isotherm ***,this inverse design pipeline leverages the power of tensor processing units(TPU)—an emerging family of dedicated chips,which,although they are specialized in deep learning,are flexible enough for intensive scientific *** approach holds promise to accelerate inverse materials design.

关键词： enough inverse isotherm

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