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Ordered mesoporous nanofibers mimicking vascular bundles for lithium metal batteries

National science Review 2024年第5期11卷 291-302页

作者： Xiaohang Zhu Mengmeng Liu Fanxing Bu Xin-Yang Yue Xiang Fei Yong-Ning Zhou Anqi Ju Jianping Yang Pengpeng Qiu Qi Xiao Chao Lin Wan Jiang Lianjun Wang Xiaopeng Li Wei Luo State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Institute of Functional Materials College of Materials Science and Engineering Donghua University Institute for Conservation of Cultural Heritage Shanghai University Frontiers Science Center for Transformative Molecules School of Chemistry and Chemical EngineeringShanghai Jiao Tong University Department of Materials Science Fudan University

Hierarchical self-assembly with long-range order above centimeters widely exists in nature. Mimicking similar structures to promote reaction kinetics of electrochemical energy devices is of immense interest, yet remains challenging. Here, we report a bottom-up self-assembly approach to constructing ordered mesoporous nanofibers with a structure resembling vascular bundles via electrospinning. The synthesis involves self-assembling polystyrene（PS） homopolymer, amphiphilic diblock copolymer, and precursors into supramolecular micelles. Elongational dynamics of viscoelastic micelle solution together with fast solvent evaporation during electrospinning cause simultaneous close packing and uniaxial stretching of micelles, consequently producing polymer nanofibers consisting of oriented micelles. The method is versatile for the fabrication of large-scale ordered mesoporous nanofibers with adjustable pore diameter and various compositions such as carbon, SiO2, TiO2and WO3. The aligned longitudinal mesopores connected side-by-side by tiny pores offer highly exposed active sites and expedite electron/ion transport. The assembled electrodes deliver outstanding performance for lithium metal batteries.

关键词： ordered mesoporous nanofibers electrospinning oriented micelles lithium metal batteries

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CADMIUM AND LEAD IONS COMPETITIVE ADSORPTION ONTO CALCIUM ALGINATE PREPARED BY TRADITIONAL AND GREEN METHODS

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UPB Scientific Bulletin, Series B: Chemistry and Materials science 2023年第2期85卷 21-34页

作者： E., Toma C.M., Simonescu P., Chipurici I., Călinescu C., Deleanu Faculty of Chemical Engineering and Biotechnologies Department of Bioresources and Polymer Science University POLITEHNICA of Bucharest Romania Faculty of Chemical Engineering and Biotechnologies Department of Analytical Chemistry and Environmental Engineering University POLITEHNICA of Bucharest Romania Kemcristal SRL Calarasi Romania

Calcium alginate (CaAlg) beads prepared by conventional, ultrasound and microwave-assisted synthesis as green methods have been applied to remove Pb(II) and Cd(II) from binary aqueous solutions. Mathematical modelling of the competitive adsorption process of Pb(II) and Cd(II) ions from binary using linear modified Langmuir isotherm equation was realized. The obtained results showed that both metal ions have an inhibitory effect in the process of removal from binary solutions. Combination of microwave and ultrasound determines the increase of the adsorption capacity of CaAlg. These results illustrate potential application of the CaAlg prepared by green methods in batch remediation of cadmium and lead ions polluted effluents. © 2023, Politechnica University of Bucharest. All rights reserved.

关键词： Ultrasonics

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Microstructure Evolution and Strain Softening of Carbon Black Filled Natural Rubber Vulcanizates

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Chinese Journal of polymer science 2023年第12期41卷 1947-1957,I0010页

作者： Xuan-Yu Shi Shi-Hao Sun Li Yang Jun Zhong Xiao-Feng Yu Zheng Xu Min Zuo Yi-Hu Song Qiang Zheng Ministry of Education Key Laboratory of Macromolecular Synthesis and FunctionalizationDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhou 310027China Shanxi-Zheda Institute of Advanced Materials and Chemical Engineering Taiyuan 030001China

Incorporation of carbon black(CB)in natural rubber(NR)enhances the Mullins effect and Payne effect of their vulcanizates,but the strain softening mechanisms and the microstructure evolution in the vulcanizates have not been clearly concluded so *** investigate the Mullins effect and Payne effect of CB filled NR vulcanizates by using cyclic tensile tests at different temperatures and dynamic rheological measurements combined with simultaneous electric *** cyclic stretching,the normalized recovery hysteresis energy and accumulative softening energy for NR/CB vulcanizates with different loadings can be both superimposed on a master curve,indicating that the Mullins effect is mainly dominated by the rubber *** irreversible simultaneous resistance evolution also reveals that the structural evolution of nanoparticles(NPs)network is not directly related to the Mullins ***,the extension of linear viscoelastic region and the hysteresis of Payne effect for filled vulcanizates subjected to cyclic stretching indicate the destruction of CB aggregated structure and the interfacial layers between CB and rubber chains during cyclic *** investigation would be illuminating for the microstructure evolution and strain softening of rubber nanocomposites under harsh service conditions.

关键词： Mullins effect Payne effect Conductive connected network Nanocomposites

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Recent advances on the systems metabolically engineered Pseudomonas species as versatile biosynthetic platforms for the production of polyhydroxyalkanoates

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Systems Microbiology and Biomanufacturing 2024年第2期4卷 473-499页

作者： Hye Min Song Seo Young Jo Haeyoung Lee Subeen Jeon Dohye Yun Chaerin Kim Jina Son Yu Jung Sohn Jong-Il Choi Si Jae Park Department of Chemical Engineering and Materials Science Graduate Program in System Health Science and EngineeringEwha Womans UniversitySeoul 03760Republic of Korea Department of Biotechnology and Bioengineering Chonnam National UniversityGwangju 61186Republic of Korea

Pseudomonas *** been considered one of the most promising microbial platform strains due to its versatile metabolism,enabling the valorization of waste materials into value-added chemical *** the native producer of polyhydroxyal-kanoates(PHAs),the biodegradable biopolyesters,it has been widely engineered by various metabolic engineering tools for the production of PHAs composed of short-chain-length and medium-chain-length monomers with adjustable composition from diverse carbon sources,ranging from pure sugars to crude oils and fatty *** review discusses the feasibility of Pseudomonas *** the industrial host strain and the recent advances regarding the systems metabolic engineering strategies for PHAs production in Pseudomonas sp.

关键词： Pseudomonas sp. Polyhydroxyalkanoates Systems metabolic engineering Synthetic biology Fermentation

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Boroxine Crystalline Covalent Organic Frameworks Based Single-ion Quasi-solid-state Conductor in Lithium-ion Battery

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Chinese Journal of polymer science 2025年第1期43卷 177-187,I0012页

作者： Hao-Min Wu Wen-Can Ma Yi-Feng Cai Xin Huang Jun-Heng Li Xi Kai Qiu-Hong Zhang Xu-Dong Jia Key Laboratory of High-Performance Polymer Material and Technology of MOE Department of Polymer Science and EngineeringSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China Institute of Chemical Industry of Forest Products Chinese Academy of Forestry DepartmentNanjing 210018China School of Chemistryand Chemical Engineering Frontiers Science Center for Transformative MoleculesShanghai Jiao Tong UniversityShanghai 200240China Executive in Low Carbon Management Division of QHSE Department Sinochem Holdings Corporation LtdCentral TowerChemsunny World Trade CenterBejing 100031China State Key Laboratory of Coordination Chemistry Nanjing UniversityNanjing 210023China

Solid-state electrolytes are considered to be the vital part of the next-generation solid-state batteries(SSBs),due to their high safety and long operation life ***,the two major factors that impede the expected performance of batteries are:the easy formation of lithium dendrites due to the concentration gradient of anions,and the low ionic conductivity at room temperature,which prevents reaching ideal electrochemical ***-ion quasi-solid-state electrolytes(SIQSSEs)could provide higher safety and energy density,owing to absence of anion concentration gradient and solvent,as well as good lithium-ion transport *** porous covalent organic frameworks(COFs)are beneficial for con-structing appropriate lithium-ion transport pathway,due to the ordered 1D *** addition,the boroxine COFs(COF-5)offers strong ability of withdrawing anion part of lithium *** but not the least,boron atom could play the role of coordinate site due to its electron *** advantages afford an opportunity to obtain a SIQSSE with high ionic conductivity and high lithium transference number(LTN)*** COF-5 based SIQSSEs delivered a high ionic conductivity of 6.3×10^(-4)S·cm^(-1),with a high LTN of 0.92 and a wide electrochemical stable window(ESW)of 4.7 V at room *** LiFePO4(LFP)/Li cells,which was assembled with COF-5 based SIQSSE,exhibited outstanding long cycle stability,high initial capacity and favorable rate *** results indicated COFs could be an ideal material for single-ion solid-state electrolytes in next-generation batteries.

关键词： Covalent organic framework Quasi-solid-state electrolyte Single-ion Lithium metal batteries

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Concept of triphenylamine side chains with four electroactive nitrogen centers toward record-high stable electrochromic polyamides

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Journal of Materials Chemistry C 2024年第24期12卷 8804-8812页

作者： Chern, Yaw-Terng Zhang, Zhe-Yuan Wang, Jane-Jen Lin, Pei-Ling Chiu, Yu-Cheng Wang, Yu-Jie Lin, Chin-Hsuan Liou, Guey-Sheng Department of Chemical Engineering National Taiwan University of Science and Technology Taipei Taiwan The Department of Nursing School of Nursing National Taipei University of Nursing and Health Sciences Taipei Taiwan Institute of Polymer Science and Engineering National Taiwan University Taipei Taiwan

Addressing the challenge of long-term electrochromic stability for polymer-based materials is the fundamental key to practical application. To date, numerous examples of electrochromic triarylamine-based polymers have been reported. However, the structure-electrochromic stability relationships are still poorly understood and mostly unexplored. Herein, the side-chain engineering concept of multiple electroactive nitrogen atoms by designing a new triphenylamine-based diamine monomer (4) is successfully incorporated into a series of novel polyamides (PAs) (5) and demonstrated the remarkable enhancement in electrochromic stability. Compared to all other triarylamine-based polymers reported to date, the studied polymer, 5a, presents the highest electrochromic stability of only 8.8% and 9.9% decay of its coloration efficiency (CE) at 1404 nm and 440 nm after 24 000 and 20 000 switching cycles at the first oxidation stage, respectively, as well as multiple color changes, and a high contrast of the optical transmittance change. The record-high electrochromic stability of 5a could be ascribed to the capability of the stabilizing polaron, originating from a charge of the cation radical dispersed by resonance in between the different redox states and evidenced clearly by the more extended wavelength absorption in the near-infrared (NIR) region. Our described concept confirms that the key to determining the electrochromic stability of the materials is the resonance by the electrons delocalized over all the redox centers rather than the electronic coupling between the different redox centers. © 2024 The Royal Society of Chemistry.

关键词： Stability

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Tungsten oxide-anchored Ru clusters with electron-rich and anti-corrosive microenvironments for efficient and robust seawater splitting

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SusMat 2024年第1期4卷 106-115页

作者： Yiming Zhang Weiqiong Zheng Huijuan Wu Ran Zhu Yinghan Wang Mao Wang Tian Ma Chong Cheng Zhiyuan Zeng Shuang Li College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengduChina Department of Chemical and Biomolecular Engineering National University of SingaporeSingaporeSingapore Department of Materials Science and Engineering and State Key Laboratory of Marine PollutionCity University of Hong KongKowloonHong KongChina Shenzhen Research Institute City University of Hong KongShenzhenChina

Ruthenium(Ru)has been recognized as a prospective candidate to substitute platinum catalysts in water-splitting-based hydrogen ***,minimizing the Ru contents,optimizing the water dissociation energy of Ru sites,and enhancing the long-term stability are extremely required,but still face a great ***,we report on creating tungsten oxide-anchored Ru clusters(Ru-WO_(x))with electron-rich and anti-corrosive microenvironments for efficient and robust seawater *** from the abundant oxygen vacancy structure in tungsten oxide support,the Ru-WO_(x)exhibits strong Ru-O and Ru-W bonds at the *** study elucidates that the strong Ru-O bonds in Ru-WO_(x)may accelerate the water dissociation kinetics,and the Ru-W bonds will lead to the strong metal-support interaction and electrons transfer fromWto *** optimal Ru-WO_(x)catalysts exhibit a low overpotential of 29 and 218mVat the current density of 10 mA cm^(−2) in alkaline and seawater media,*** outstanding long-term stability discloses that the Ru-WO_(x)catalysts own efficient corrosion resistance in seawater *** believe that thiswork offers new insights into the essential roles of electron-rich and anti-corrosivemicroenvironments in Ru-based catalysts and provide a new pathway to design efficient and robust cathodes for seawater splitting.

关键词： hydrogen production microenvironment modulation noble metal catalysts seawater splitting tungsten oxide

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Enhancing waste sorting and recycling efficiency: robust deep learning-based approach for classification and detection

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Neural Computing and Applications 2025年第6期37卷 4567-4583页

作者： Sayem, Faizul Rakib Islam, Md. Sakib Bin Naznine, Mansura Nashbat, Mohammad Hasan-Zia, Mazhar Kunju, Ali K Ansaruddin Khandakar, Amith Ashraf, Azad Majid, Molla Ehsanul Kashem, Saad Bin Abul Chowdhury, Muhammad E. H. Department of Electrical and Electronic Engineering University of Dhaka Dhaka Bangladesh Department of Biomedical Engineering Military Institute of Science and Technology Dhaka Bangladesh Department of Computer Science & Engineering Rajshahi University of Engineering & Technology Rajshahi6204 Bangladesh Chemical Engineering Department University of Doha for Science and Technology Doha Qatar Department of Electrical Engineering Qatar University Doha2713 Qatar Computer Applications Department Academic Bridge Program Qatar Foundation Doha Qatar Department of Computing Science AFG College With the University of Aberdeen Doha Qatar

Given the severity of waste pollution as a major environmental concern, intelligent and sustainable waste management is becoming increasingly crucial in both developed and developing countries. The material composition and volume of urban solid waste are key considerations in processing, managing, and utilizing city waste. Deep learning technologies have emerged as viable solutions to address waste management issues by reducing labor costs and automating complex tasks. However, the limited number of trash image categories and the inadequacy of existing datasets have constrained the proper evaluation of machine learning model performance across a large number of waste classes. In this paper, we present robust waste image classification and object detection studies using deep learning models, utilizing 28 distinct recyclable categories of waste images comprising a total of 10,406 images. For the waste classification task, we proposed a novel dual-stream network that outperformed several state-of-the-art models, achieving an overall classification accuracy of 83.11%. Additionally, we introduced the GELAN-E (generalized efficient layer aggregation network) model for waste object detection tasks, obtaining a mean average precision (mAP50) of 63%, surpassing other state-of-the-art detection models. These advancements demonstrate significant progress in the field of intelligent waste management, paving the way for more efficient and effective solutions. © The Author(s) 2024.

关键词： Deep learning for waste management Intelligent waste management Object detection in waste management Sustainable waste processing Urban solid waste Waste image classification

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Porphyrin-Grafted Poly(ethylene terephthalate) as a Reusable and Highly Selective Colorimetric Probe for Mercuric Ion Contaminants in Aqueous Samples

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ACS Applied Materials and Interfaces 2024年第30期16卷 39195-39205页

作者： Atayde, Eduardo C. Takenaka, Yasumasa Abe, Hideki Wu, Ming-Rou Wu, Kevin C.-W. Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Department of Chemistry National Tsing Hua University Department of Chemical Engineering National Taiwan University Bioplastic Research Team RIKEN Center for Sustainable Resource Science Department of Chemical Engineering and Materials Science Yuan Ze University Department of Chemical Engineering Chung Yuan Christian University

Heavy metals are the most hazardous water pollutants, with severe health and environmental consequences. Among these, mercuric (Hg2+) ions are known to cause detrimental health issues in both humans and aquatic life. ... 详细信息

Heavy metals are the most hazardous water pollutants, with severe health and environmental consequences. Among these, mercuric (Hg²⁺) ions are known to cause detrimental health issues in both humans and aquatic life. Due to this, several analytical techniques have been devised to detect and quantify the amount of this ion. However, most of these require advanced instrumentation, prolonged analysis time, and sample preparation. In this study, a low-cost and highly reusable colorimetric probe was developed by grafting porphyrin to poly(ethylene terephthalate) sheets using an oxazoline polymer as covalent adhesive. Upon exposure to trace amounts of Hg²⁺ in solution, the fabricated material visually transitioned from faint brownish pink to green by the complexation mechanism. Additionally, the transparency of this probe allowed the quantitative spectrophotometric determination of the Hg²⁺ concentration in aqueous samples. It was also shown that the material is highly stable, which can be reused for more than 50 times without significant decline in its performance, hence, making it suitable for the onsite monitoring of mercuric ion contamination in different bodies of water. © 2024 The Authors. Published by American chemical Society.

关键词： colorimetric probe mercuric ion oxazoline PET porphyrin

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Efficient predictions of formation energies and convex hulls from density functional tight binding calculations

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Journal of Materials science & Technology 2023年第10期141卷 236-244页

作者： Anshuman Kumar Zulfikhar A.Ali Bryan M.Wong Materials Science&Engineering Program University of California-RiversideRiverside92521CAUSA Department of Physics&Astronomy University of California-RiversideRiverside92521CAUSA Materials Science&Engineering Program Department of Chemical&Environmental EngineeringDepartment of Physics&Astronomyand Department of ChemistryUniversity of California-RiversideRiverside92521CAUSA

Defects in materials significantly alter their electronic and structural properties,which affect the per-formance of electronic devices,structural alloys,and functional ***,calculating all the possible defects in complex materials with conventional Density Functional Theory(DFT)can be compu-tationally *** enhance the efficiency of these calculations,we interfaced Density Functional Tight Binding(DFTB)with the Clusters Approach to Statistical Mechanics(CASM)software package for the first *** SiC and ZnO as representative examples,we show that DFTB gives accurate results and can be used as an efficient computational approach for calculating and pre-screening formation ener-gies/convex *** DFTB+CASM implementation allows for an efficient exploration(up to an order of magnitude faster than DFT)of formation energies and convex hulls,which researchers can use to probe other complex systems.

关键词： CASM DFTB DFT Formation energy Convex hull

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