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Enhancing MXene-based supercapacitors:Role of synthesis and 3D architectures

Journal of Energy chemistry 2024年第4期91卷 1-26页

作者： Wen Siong Poh Wen Jie Yiang Wee-Jun Ong Pau Loke Show chuan Yi foo School of Energy and chemical Engineering Xiamen University MalaysiaSelangor Darul EhsanMalaysia&College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005FujianChina Kelip-kelip!center of Excellence for Light Enabling Technologies Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia center of Excellence for NaNo Energy&catalysis Technology(cONNEcT) Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia Department of chemical Engineering Khalifa UniversityShakhbout Bin Sultan St-Zone 1Abu DhabiUnited Arab Emirates Zhejiang Provincial Key Laboratory for Subtropical Water Environment and Marine Biological Resources Protection Wenzhou UniversityWenzhou 325035ZhejiangChina Department of chemical and Environmental Engineering Faculty of Science and EngineeringUniversity of Nottingham MalaysiaJalan Broga43500 SemenyihSelangor Darul EhsanMalaysia Department of Sustainable Engineering Saveetha School of EngineeringSIMATSChennai 602105India

MXene has been the limelight for studies on electrode active materials,aiming at developing supercapacitors with boosted energy density to meet the emerging influx of wearable and portable electronic *** its various desirable properties including intrinsic flexibility,high specific surface area,excellent metallic conductivity and unique abundance of surface functionalities,its full potential for electrochemical performance is hindered by the notorious restacking phenomenon of MXene *** to its two-dimensional(2D)nature and surface functional groups,inevitable Van der Waals interactions drive the agglomeration of nanosheets,ultimately reducing the exposure of electrochemically active sites to the electrolyte,as well as severely lengthening electrolyte ion transport *** a result,energy and power density deteriorate,limiting the application versatility of MXene-based *** 3D architectures using 2D nanosheets presents as a straightforward yet ingenious approach to mitigate the fatal flaws of ***,the sheer number of distinct methodologies reported,thus far,calls for a systematic review that unravels the rationale behind such 3D MXene structural ***,this review aims to serve this purpose while also scrutinizing the structure–property relationship to correlate such structural modifications to their ensuing electrochemical performance ***,the physicochemical properties of MXene play fundamental roles in determining the effective charge storage capabilities of 3D MXene-based *** largely depends on different MXene synthesis techniques and synthesis condition variations,hence,elucidated in this review as ***,the challenges and perspectives for achieving viable commercialization of MXene-based supercapacitor electrodes are highlighted.

关键词： MXene 3D architectures Synthesis design Supercapacitor Energy storage

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Allying interfacial engineering of 2D carbon nanosheet-,graphene-,and graphdiyne-based heterostructured electrocatalysts toward hydrogen evolution and overall water splitting

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Electron 2024年第1期2卷 106-163页

作者： Wuwei Mo Joel Jie foo Wee‐Jun Ong School of Energy and chemical Engineering Xiamen University MalaysiaSepangSelangor Darul EhsanMalaysia center of Excellence for NaNo Energy&catalysis Technology(cONNEcT) Xiamen University MalaysiaSepangSelangor Darul EhsanMalaysia State Key Laboratory of Physical chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamenChina Gulei Innovation Institute Xiamen UniversityZhangzhouChina Shenzhen Research Institute of Xiamen University ShenzhenChina

Electrochemical hydrogen evolution reaction(HER)and overall water splitting(OWS)for renewable energy generation have recently become a highly promising and sustainable strategy to tackle energy crisis and global warming arising from our overreliance on fossil ***,tremendous research breakthroughs have been made in 2D carbon-based heterostructured electrocatalysts in this *** heterostructures are distinguished by their remarkable electrical conductivity,exposed active sites,and mechanical ***,with fundamental mechanisms of electrocatalytic OWS summarized,our review critically emphasized on state-of-the-art 2D carbon nanosheet-,graphene-,and graphdiyne-based heterostructured electrocatalysts in HER and OWS since ***,the three emerging carbonaceous substrates tend to be incorporated with metal carbides,phosphides,dichalcogenides,nitrides,oxides,nanoparticles,single atom catalysts,or layered double ***,fascinating structural engineering and facile synthesis strategies were also unraveled to establish the structure-activity relationship,which will enlighten future electrocatalyst developments toward ameliorated HER and OWS ***,computational results from density functional theory simulations were highlighted as well to better comprehend the synergistic effects within the ***,current stages and future recommendations of this brand-new electrocatalyst type were concluded and discussed for advanced catalyst designs and future practical applications.

关键词： 2D carbon-based heterostructures electrocatalysis hydrogen evolution reaction interfacial engineering overall water splitting

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释放多孔纳米结构的活力:可持续电催化水分解

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chinese Journal of catalysis 2024年第3期58卷 37-85页

作者：罗健颖傅捷叶丰铭梁汉锋王伟俊厦门大学马来西亚分校能源与化工学院马来西亚雪兰莪州厦门大学马来西亚分校纳米能源与催化技术卓越中心(CONNECT)马来西亚雪兰莪州厦门大学化学与化工学院固体表面物理化学国家重点实验室福建厦门361005 厦门大学古雷创新学院福建漳州363200 厦门大学深圳研究院广东深圳518057

电化学整体水分解(OWS)作为一种很有应用前景的能源转换技术,可用于生产清洁的可再生氢燃料,引起了人们的广泛关注.然而,水分解反应的半反应,即析氧反应(OER),因动力学缓慢、水分解热力学势垒高和能量消耗大等问题制约了OWS的广泛应用.... 详细信息

电化学整体水分解(OWS)作为一种很有应用前景的能源转换技术,可用于生产清洁的可再生氢燃料,引起了人们的广泛关注.然而,水分解反应的半反应,即析氧反应(OER),因动力学缓慢、水分解热力学势垒高和能量消耗大等问题制约了OWS的广泛应用.研究发现,采用地球储量丰富的元素设计的多孔材料可以显著提高活性位点数量及其可及性,增大比表面积,优化反应物的吸附/脱附,改善传质,进而表现出较好的电催化活性.因此,系统梳理总结多孔纳米材料在电催化分解水领域的研究进展具有重要的意义.本文综述了近年来用于析氢反应,OER和OWS的多孔电催化剂的研究进展.聚焦于合成策略的最新进展,并结合多孔结构在电催化剂中的独特作用进行了讨论.概述了各种新兴的多孔电催化剂改性策略,包括结构工程、相工程、缺陷工程和应变工程;重点介绍了合成方法、多孔材料性能提升、机理理解、集成实验、水分解的理论研究和先进的改性策略,并提出了合成工艺.特别总结了结构-活性关系的研究成果,为设计和改性具有独特性能的多孔材料提供参考.最后,本文强调了当前多孔电催化剂所面临的科学挑战和未来发展方向,旨在为推动多孔电催化剂在电化学水分解领域的应用和发展提供借鉴.

关键词：多孔材料电催化析氢反应析氧反应水分解

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An early report: a modified porphyrin-linked metronidazole targeting intracellular Porphyromonas gingivalis in cultured oral epithelial cells

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International Journal of Oral Science 2017年第3期9卷 167-173页

作者： Ping Ye Jiho chang Lin Feng foo Benjamin c-M Yap Institute of Dental Research Centre for Oral Health Westmead Hospital Affiliation of Faculty of Dentistry the University of Sydney

Porphyromonas gingivalis （P. gingivalis） has a strong association with the pathogenesis of periodontal disease. Recurrence of periodontal disease following therapy is attributed to numerous factors, and of growing interest is the potential problem of intracellular bacteria that are able to persist and multiply within the host cell, thereby facilitating relapse of infection. The effect of antibiotic therapy in controlling P. gingivalis is questionable. Accordingly, while metronidazole is very effective against anaerobic extracellular P. gingivalis by disrupting the DNA of anaerobic microbial cells, this antibiotic does not effectively penetrate into mammalian cells to inhibit intracellular bacteria. Therefore in the present study, a modified porphyrin-linked metronidazole adducts, developed in our laboratory, was used to kill intracellular P. gingivalis. A series of experiments were performed, including cytotoxicity assays and cellular uptake of adducts by flow cytometry coupled with live cell imaging analysis, P. gingivalis invasion and elimination assays, and the analysis of colocalization of P. gingivalis and porphyrin-linked metronidazole by confocal laser scanning microscopy. Findings indicated that P. gingivalis and porphyrin-linked metronidazole were colocalized in the cytoplasm, and this compound was able to kill P. gingivalis intracellular with a sufficient culture time. This is a novel antimicrobial approach in the elimination of P. gingivalis from the oral cavity.

关键词： porphyrin-linked metronidazole Porphyromonas gingivalis periodontitis oral epithelial cells

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研究神经胶质细胞的新兴技术

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神经损伤与功能重建 2020年第10期15卷 F0003-F0003页

作者： Hélène Hirbec Nicole Déglon lynette c foo Inbal Goshen Jaime Grutzendler Emilie Hangen Tirzah Kreisel Nathalie Linck Julien Muffat Sara Regio Sybille Rion carole Escartin 杜一星 Institute for Functional Genomics(IGF) University of MontpellierCNRSINSERMMontpellierFrance Laboratory of Neurotherapies and Neuromodulation Department of Clinical NeuroscienceLausanne University HospitalUniversity of LausanneLausanneSwitzerland Laboratory of Neurotherapies and Neuromodulation Neuroscience Research CenterLausanne University Hospital and University of LausanneLausanneSwitzerland Neuroimmunology and Neurodegeneration Section The Neuroscience and Rare Diseases Discovery and Translational AreaF.Hoffman-La RocheBaselSwitzerland Edmond and Lily Safra center for Brain Sciences The Hebrew University of JerusalemJerusalemIsrael Department of Neurology Yale University School of MedicineNew HavenConnecticutUSA Department of Neuroscience Yale University School of MedicineNew HavenConnecticutUSA commissariatà l'Energie Atomique et aux Energies Alternatives Département de la Recherche FondamentaleInstitut de Biologie François JacobMIRCenFontenay-aux-RosesFrance centre National de la Recherche Scientifique Neurodegenerative Diseases LaboratoryUniversitéParis-SudUniversitéParis-SaclayUMR 9199Fontenay-aux-RosesFrance Program in Neurosciences and Mental Health The Hospital for Sick Childrenand Department of Molecular GeneticsThe University of TorontoTorontoCanada 不详

大脑的发育、生理功能和病理与神经元和不同类型的神经胶质细胞(如星形胶质细胞、小胶质细胞、少突胶质细胞和少突胶质细胞的前体细胞等)之间的相互作用密切相关。研究脑功能及其功能障碍,除了神经元之外,还需要对不同类型的神经胶质细... 详细信息

大脑的发育、生理功能和病理与神经元和不同类型的神经胶质细胞(如星形胶质细胞、小胶质细胞、少突胶质细胞和少突胶质细胞的前体细胞等)之间的相互作用密切相关。研究脑功能及其功能障碍,除了神经元之外,还需要对不同类型的神经胶质细胞进行研究。近年来,多项技术突破使“神经胶质科学家”能够解决新的具有挑战性的生物学问题。这些技术发展使得以中/高含量工作流研究特定细胞类型的作用成为可能,并在保存完好的环境中对其相互作用进行精细的分析。本综述阐明了几种可能揭示神经胶质细胞在特定脑功能或疾病中作用的尖端实验方法。这些实验方法包括高级细胞培养,诱导多能干细胞(iPSc)衍生的人神经胶质细胞,病毒载体,原位胶质细胞成像,光学遗传学和化学遗传学方法,以及高内涵分子分析。本文还阐述了某些技术的临床转化,通过特定的脑成像方法以监控患者的神经胶质细胞。本文亦讨论了每种技术的优点,缺陷和未来发展,并提供了选定的示例以说明现在如何可以解决特定的“胶质生物学”问题。

关键词：神经胶质细胞少突胶质细胞小胶质细胞星形胶质细胞脑功能细胞培养细胞类型脑成像

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Dimensional heterojunction design:The rising star of 2D bismuthbased nanostructured photocatalysts for solar-to-chemical conversion

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Nano Research 2023年第4期16卷 4310-4364页

作者： Joel Jie foo Sue-Faye Ng Wee-Jun Ong School of Energy and chemical Engineering Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia center of Excellence for NaNo Energy&catalysis Technology(cONNEcT) Xiamen University MalaysiaSelangor Darul Ehsan 43900Malaysia college of chemistry and chemical Engineering Xiamen UniversityXiamen 361005China Shenzhen Research Institute of Xiamen University Shenzhen 518057China

With the fast-pace digitalization evolution in the current generation’s lifestyle and the industry revolution,the energy demand has been ***,the two-dimensional(2D)bismuth-based nanomaterials emerged as a promising photocatalyst candidate in solar fuel conversion,not only for its exceptional light absorption capability and tunable optical properties,but it also can be synthesized into diverse variety of nanomaterials with different ranges of potential gap and band position to fulfill the potential requirement of wide range of photocatalytic ***,the weak light harvesting ability and ultrafast charge recombination has restricted its potential in commercial ***,recent researches have been focusing on tackling these issues by incorporating some modification strategies such as heteroatom doping,vacancy engineering,facet engineering,bismuth rich strategy and heterojunction ***,this review article presents the state-of-the-art modifications on 2D bismuth-based parent material,specifically on the relationship between each of the modification strategy on the electronic properties and surface chemistry in achieving boosted photocatalytic *** the view of the unique charge interaction between two semiconductors with different dimensions,we systematically discuss the rational heterostructure design from the dimensionality perspective,namely,point-to-face,line-to-face,face-to-face,and bulk-to-face in solar fuel conversion to provide inspiring insights for future interface ***,the challenges and the future research outlook in the solar-to-fuel conversion are highlighted to push forward the design of high-performance bismuth-based photocatalyst in realizing commercialscale solar-to-fuel conversion.

关键词： 2D heterojunction 2D nanomaterial cO_(2)reduction water splitting N2 fixation Z-scheme

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A 3D multi-field element for simulating the electromechanical coupling behavior of dielectric elastomers

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Acta Mechanica Solida Sinica 2017年第4期30卷 374-389页

作者： Jun Liu choon chiang foo Zhi-Qian Zhang Institute of High Performance computing A*STAR

We propose a multi-field implicit finite element method for analyzing the electromechanical behavior of dielectric elastomers. This method is based on a four-field variational principle, which includes displacement and electric potential for the electromechanical coupling analysis, and additional independent fields to address the incompressible constraint of the hyperelastic material. Linearization of the variational form and finite element discretization are adopted for the numerical implementation. A general FEM program framework is devel- oped using c＋＋ based on the open-source finite element library *** to implement this proposed algorithm. Numerical examples demonstrate the accuracy, convergence properties, mesh-independence properties, and scalability of this method. We also use the method for eigenvalue analysis of a dielectric elastomer actuator subject to electromechanical loadings. Our finite element implementation is available as an online supplementary material.

关键词： Dielectric elastomer Electromechanical coupling Implicit multi-field finite element method Eigenvalue problem

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Solar-powered chemistry: Engineering low-dimensional carbon nitride-based nanostructures for selective cO_(2) conversion to c_(1)- c_(2) products

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InfoMat 2022年第1期4卷 40-104页

作者： Sue-Faye Ng Joel Jie foo Wee-Jun Ong School of Energy and chemical Engineering Xiamen University MalaysiaSepangSelangorMalaysia center of Excellence for NaNo Energy&catalysis Technology(cONNEcT) Xiamen University MalaysiaSepangSelangorMalaysia college of chemistry and chemical Engineering Xiamen UniversityXiamenChina

cO_(2)capture and conversion has been prospected as an auspicious technology to simultaneously tackle the rise in global cO_(2)emission and produce valueadded fuels with the goal of accomplishing carbon neutrality.A sustainable route to achieve this is via the utilization of solar energy,thereby harnessing the abundant and nonexhaustive resource to shift our reliance away from rapidly depleting fossil *** carbon nitride(g-c_(3)N_(4))and its allotrope have earned its rank as a fascinating metal-free photocatalyst due to its superior stability,high surface-area-to-volume ratio,and tunable surface *** leveraging these properties,robust carbon nitride-based nanostructures are engineered for photocatalytic cO_(2)conversion to energy-rich c_(1)-c_(2) product,which is indispensable in the chemical ***,this review presents the latest panorama of experimental and computational research on tuning the local electronic,surface chemical coordination environment,charge dynamics and optical properties of low-dimensional carbon nitride and its allotropes toward highly selective and efficient cO_(2)*** name a few,structural engineering,point-defect engineering,heterojunction construction,and cocatalyst *** advance this frontier,critical insights are elucidated to establish the structure-performance relationship and unravel primary factors dictating the selectivity of c_(1)-c_(2) molecules from cO_(2)***-field assisted photocatalysis such as with electric(photoelectro-)and heat(photothermal)is discussed to uncover the synergistic contributions that drive the development in ***,future challenges and prospects are outlined for the potential application of solar-driven cO_(2)conversion,along with the scale-up strategy from the economic viewpoint toward the rational development of high-efficiency carbon nitride catalysts.

关键词： carbon nitride cO_(2)reduction external fields interfacial design nanostructure photocatalysis

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Optimization and evaluation of reduced graphene oxide hydrogel composite as a demulsifier for heavy crude oil-in-water emulsion

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chinese Journal of chemical Engineering 2021年第5期34卷 297-305页

作者： Kin Kit Fong Inn Shi Tan Henry chee Yew foo Man Kee Lam Adrian chiong Yuh Tiong Steven Lim Department of Petroleum Engineering Faculty of Engineering and ScienceCurtin UniversityCDT 25098009 MiriSarawakMalaysia Department of chemical Engineering Faculty of Engineering and ScienceCurtin UniversityMiri 98009Malaysia chemical Engineering Department Universiti Teknologi PETRONASSeri Iskandar 32610Malaysia HIcoE-centre for Biofuel and Biochemical Research Institute of Self-Sustainable BuildingUniversiti Teknologi PETRONASSeri Iskandar 32610Malaysia Department of chemical Engineering Lee Kong Chian Faculty of Engineering and ScienceUniversiti Tunku Abdul RahmanKajang 43000Malaysia centre for Photonics and Advanced Materials Research Universiti Tunku Abdul RahmanKajang 43000Malaysia

The rising production of produced water from oilfields had been proven to bring detrimental environmental *** this study,an efficient,recyclable,and environmental-friendly reduced graphene oxide immobilizedκ-carrageenan hydrogel composite(κcaGO)was fabricated as an alternative sorbent for crude oil-in-water ***(PEI)was employed to form a stable hydrogel *** conditions for the immobilization of graphene oxide(GO)on PEI-modifiedκ-carrageenan(κc)beads were optimized *** immobilization yield of 77%was attained at 2%PEI,2 h immobilization activation time,and pH ***,the synthesizedκcaGO is capable of demulsification with an average demulsification efficiency of 70%.It was found that the demulsification efficiency increases with salinity andκcaGO dosage,and it deteriorates under alkaline *** phenomena can be attributed to the interfacial interactions betweenκcaGO and the ***,theκcaGO can be recycled to use for up to six cycles without significant leaching and *** such,the synthesizedκcaGO could be further developed as a potential sorbent substitute for the separation of crude oil from produced water.

关键词： Graphene oxide κ-carrageenan Adsorbents Demulsification composites Waste water

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Mesomorphic behaviour of new azomethine liquid crystals having terminal bromo substituent

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chinese chemical Letters 2012年第2期23卷 177-180页

作者： Sie Tiong Ha Teck Leong Lee Siew Ling Lee Guan Yeow Yeap Yip foo Win Siew Teng Ong Department of chemical Science Faculty of ScienceUniversiti Tunku Abdul RahmanJln UniversitiBandar Barat31900 KamparMalaysia Ibnu Sina Institute for Fundamental Science Studies Universiti Teknologi Malaysia81310 UTM SkudaiMalaysia Liquid crystal Research Laboratory School of Chemical SciencesUniversiti Sains Malaysia11800 MindenMalaysia Department.of chemical Science Faculty of ScienceUniversiti Tunku Abdul RahmanJln UniversitiBandar Barat31900 KamparMalaysia

A homologous series of azomethine esters,4-n-alkanoyloxybenzylidene-4＇-bromoanilines possessing even number of carbon atoms at the terminal alkanoyloxy chain（c_（n-1）H_（2n-1）cOO- n = 8,10,12,14,16,18） was synthesized and *** n-octanoyloxy to n-dodecanoyloxy derivatives exhibited enantiotropic smectic A and smectic B phases,n-tetradecanoyloxy to n-octadecanoyloxy derivatives possessed enantiotropic smectic A and monotropic smectic B properties.n-Decanoyloxy derivatives demonstrated the optimum exhibition for both smectic A and smectic B *** was found that the length of terminal alkanoyloxy chain has an influence on mesomorphic properties.

关键词： Liquid crystals Schiff base ester Enantiotropic Smectic A Smectic B

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