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Plasmonic tandem heterojunctions enable high-efficiency charge transfer for broad spectrum photocatalytic hydrogen production

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Journal of Energy Chemistry 2025年第1期100卷 710-720页

作者： Wenxuan Chen Xiu-Qing Qiao Guo Hui Bojing Sun Dongfang Hou Meidi Wang Xueqian Wu Tao Wu Dong-Sheng Li College of materials and Chemical Engineering Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials China Three Gorges University Hubei Three Gorges Laboratory College of Chemistry and materials Science and Guangdong Provincial Key Laboratory of Supramolecular Coordination Chemistry Jinan University

Rational engineering of semiconductor photocatalysts for efficient hydrogen production is of great significance but still challenging,primarily due to the limitations in charge transfer ***,a fascinating plasmonic tandem heterojunction with the hc-CdS/Mo2C@C heterostructure is aimfully prepared for effectively promoting the charge separation kinetics of the CdS photocatalyst via the synergistic strategy of phase junction,Schottky junction,and photothermal *** difference in atomic configuration between cubic-CdS （c-CdS） and hexagonal-CdS （h-CdS） leads to effective charge separation through a typical Ⅱ charge transfer mechanism,and plasmonic Schottky junction further extracts the electrons in the hc-CdS phase junction to realize gradient charge ***,the photothermal effect of Mo2C@C helps to expand the light absorption,accelerate charge transfer kinetics,and reduce the hydrogen evolution energy *** carbon layer provides a fast channel for charge transfer and protects the photocatalyst from *** a result,the optimized hc-cmc photocatalyst exhibits a significantly high photocatalytic H2production activity of 28.63 mmol/g/h and apparent quantum efficiency of 61.8%,surpassing most of the reported *** study provides a feasible strategy to enhance the charge transfer kinetics and photocatalytic activity of CdS by constructing plasmonic tandem heterogeneous junctions.

关键词： Heterojunctions LSPR Photocatalyst Phase junction Schottky junction Photothermal effect

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Porous carbon materials for CO_(2)capture,storage and electrochemical conversion

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materials Reports(Energy) 2023年第2期3卷 43-61,I0002页

作者： Changmin Kim Siddulu Naidu Talapaneni Liming Dai Australian Carbon materials Centre(A-cmc) School of Chemical EngineeringUniversity of New South WalesSydneyNSW2052Australia

Continuous accumulation and emission into the atmosphere of anthropogenic carbon dioxide(CO_(2)),a major greenhouse gas,has been recognized as a primary contributor to climate change associated with the global warming and acidification of *** has led to drastic changes in the natural ecosystem,and hence an unhealthy ecological environment for human ***,the effective mitigation of the ever increasing CO_(2)emission has been recognized as the most important global *** achieve zero carbon footprint,novel materials and approaches are required for potentially reducing the CO_(2)release,while our current fossil-fuel-based energy must be replaced by renewable energy free from *** this paper,porous carbons with hierarchical pore structures are promising for CO_(2)adsorption and electrochemical CO_(2)reduction owing to their high specific surface area,excellent catalytic performance,low cost and long-term *** efficient gas-phased(electro)catalysis involves the access of reactants to active sites at the gas-liquid-solid triple phase,the hierarchical porous carbon materials possess multiple advantages for various CO_(2)-related applications with enhanced volumetric and gravimetric activities(e.g.,CO_(2)uptake and current density)for practical *** studies have demonstrated that porous carbon materials exhibited notable activities as CO_(2)adsorbents and provided facile conducting pathways and mass diffusion channels for efficient electrochemical CO_(2)reduction even under the high current operation ***,we summarize recent advances in porous carbon materials for CO_(2)capture,storage,and electrochemical *** and challenges on the rational design of porous carbon materials for scalable and practical CO_(2)capture and conversion are also discussed.

关键词： Porous carbons Carbon dioxide storage Carbon dioxide reduction Electrocatalysts Carbon dioxide adsorbents Doped carbon

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Thermo-oxidative degradation of Nylon 1010 films:Colorimetric evaluation and its correlation with material properties

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Chinese Chemical Letters 2017年第5期28卷 949-954页

作者： Li-Hai Cai Zhi-Guo Qi Jun Xu Bao-Hua Guo Zhong-Yao Huang Key Laboratory of Advanced materials of Ministry of Education Department of Chemical EngineeringTsinghua UniversityBeijing 100084China Institute of Petroleum Logistical Support DepartmentCMCBeijing 102300China

The thermo-oxidative aging behaviors of Nylon 1010 films were studied by various analytical methods,such as measuring the chromaticity,relative viscosity,carbonyl index,UV absorbance at 280 nm and elongation at break of the aged *** thermo-oxidative aging plots of the results obtained via these various methods at different temperatures are subjected to the time-temperature superposition analysis,which are found to be well *** b＊ values are used as X axis and the other results,i.e.,relative viscosity,carbonyl index,UV absorbance at 280 nm and elongation at break,are used as V axis,*** relationship between the b values and the other results is obtained,from which we can derive the changes of physical and chemical properties at different b＊ *** the b＊ values can be quickly determined by using a portable spectrophotometer,the on-line evaluation of the thermo-oxidative aging of Nylon 1010 can be realized.

关键词： Nylon 1010 Colorimetric evaluation Thermo-oxidative degradation Carbonyl index UV absorbance Elongation at break Activation energy

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A review of potential mechanisms and uses of SGLT2 inhibitors in ischemia-reperfusion phenomena

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World Journal of Diabetes 2022年第9期13卷 683-695页

作者： Victor Quentin Manveer Singh Lee S Nguyen Intensive Care Medicine CMC Ambroise ParéNeuilly-sur-Seine 92200France Research and Innovation CMC Ambroise ParéNeuilly-sur-Seine 92200France

Recently added to the therapeutic arsenal against chronic heart failure as a first intention drug,the antidiabetic drug-class sodium-glucose cotransporter-2 inhibitors(SGLT2i)showed efficacy in decreasing overall mortality,hospitalization,and sudden death in patients of this very population,in whom chronic or acute ischemia count among the first ***,this benefit was observed independently from diabetic status,and benefited both preserved and altered ventricular ejection *** feature,observed in several large randomized controlled trials,suggests additional effects from SGLT2i beyond isolated glycemia ***,both in-vitro and animal models suggest that inhibiting the Na+/H+exchanger(NHE)may be key to preventing ischemia/reperfusion injuries,and by extension may hold a similar role in ischemic damage control and ischemic ***,several other mechanisms may be explored which may help better target those who may benefit most from SGLT2i *** of a large therapeutic margin with few adverse events,ease of prescription and potential pharmacological efficacity,SGLT2i could be candidate for wider *** this review,we aim to summarize all evidence which link SGLT2i and ischemia/reperfusion injuries modulation,by first listing known mechanisms,including metabolic switch,prevention of lethal arrythmias and others,which portend the latter,and second,hypothesize how the former may interact with these mechanisms.

关键词： SGLT2 inhibitors Ischemia-reperfusion injuries Sodium-proton exchanger Myocardial ischemia Immunomodulation

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Hierarchically porous cmc/rGo/CNFs aerogels for leakage-proof mirabilite phase change materials with superior energy thermal storage

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Frontiers of materials Science 2022年第4期16卷 49-61页

作者： Fenglan CHEN Xin LIU Zhengya WANG Shengnian TIE Chang-An WANG New Energy Photovoltaic Industry Research Center Qinghai UniversityXining 810016China School of Chemical Engineering Qinghai UniversityXining 810016China State Key Lab of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

As a kind of essential hydrated salt phase change energy storage materials,mirabilite with high energy storage density and mild phase-transition temperature has excellent application potential in the problems of solar time and space ***,there are some disadvantages such as supercooling,substantial phase stratification and leakage problem,limiting its further *** this work,for the preparation of shaped mirabilite phase change materials(MPcMs),graphene(GO),sodium carboxymethyl cellulose(cmc),and carbon nanofibers(CNFs)were used as starting materials to prepare lightweight cmc/rGO/CNFs carbon aerogel(CGCA)as support with stable shape,high specific surface area,and well-arranged hierarchically porous *** results show that CGCA has regular layered plentiful pores and stable foam structure,and the pore and sheet interspersed structure in CGCA stabilizes PcMs via capillary force and surface *** hydrophilic aerogels supported MPCMs decrease mirabilite leaking and reduce supercooling to around *** latent heats of melting and crystallization of CGCA-supported mirabilite phase change materials(CGCA-PCMs)are 157.1 and 114.8 J-g-1,***,after 1500 solid-liquid cycles,there is no leakage,and the retention rate of crystallization latent heat is 45.32%,exhibiting remarkable thermal cycling stability.

关键词： carbon aerogel mirabilite phase change material supercooling thermal cycling stability

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Recent advances in flexible batteries:From materials to applications

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Nano Research 2023年第4期16卷 4821-4854页

作者： Fuwei Xiang Fang Cheng Yongjiang Sun Xiaoping Yang Wen Lu Rose Amal Liming Dai College of Chemical Science and Engineering Yunnan UniversityKunming 650091China Institute of Energy Storage Technologies Yunnan UniversityKunming 650091China Australian Carbon materials Centre(A-cmc) School of Chemical EngineeringUniversity of New South WalesSydneyNSW 2052Australia

Along with the rapid development of flexible and wearable electronic devices,there have been a strong demand for flexible power sources,which has in turn triggered considerable efforts on the research and development of flexible *** ideal flexible battery would have not only just high electrochemical performance but also excellent mechanical ***,battery constituent components,chemistry systems,device configurations,and practical applications are all pivotal aspects that should be thoroughly ***,we systematically and comprehensively review the fundamentals and recent progresses of flexible batteries in terms of these important ***,we first discuss the requirements for constituent components,including the current collector,electrolyte,and separator,in flexible *** then elucidate battery chemistry systems that have been studied for various flexible batteries,including lithium-ion batteries,non-lithium-ion batteries,and high-energy metal *** is followed by discussions on the device configurations for flexible batteries,including onedimensional fiber-shaped,two-dimensional film-shaped,and three-dimensional structural ***,we summarize recent efforts in exploring practical applications for flexible *** challenges and future opportunities for the research and development of flexible batteries are also discussed.

关键词： flexible batteries flexible power sources wearable electronics electrochemistries battery applications

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Accelerating the design of multicomponent rare earth silicates for SiC_(f)/SiC cmc by combinatorial material chip design and high throughput screening

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Journal of materials Science & Technology 2023年第19期150卷 96-103页

作者： Xirui Lv Yiming Lei Zhao Zhang Jie Zhang Jingyang Wang Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China

High throughput experimentation is employed to establish a ternary system with the compositional range of 30.8 mol.%-75.7 mol.%SiO_(2),16.6 mol.%-61.7 mol.%Yb_(2)O_(3),and 6.3 mol.%-4.1 moll.%Ho_(2)O_(3) through co-sputtering deposition on one combinatorial material *** their application in advanced SiC_(f)/SiC cmc,the phase composition and mechanical properties of samples with various RE/Si ratios and Yb/Ho ratios are comprehensively *** stability and thermal expansion compatibility between SiC and RE silicates with different compositions are also *** materials for the application of environmental barrier coating and interphase for SiC_(f)/SiC cmc are screened respectively according to the above trends and *** work is a case study to establish a composition-property library for RE_(2)O_(3)-SiO_(2) *** is inspired more complicated multicomponent RE silicates could be prepared and characterized by high throughput experimentation,accelerating the design and screening of promising optimal candidates.

关键词： High throughput experimentation RE silicates Phase stability Mechanical properties

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Charge transfer of carbon nanomaterials for efficient metal‐free electrocatalysis

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Interdisciplinary materials 2022年第1期1卷 28-50页

作者： Rajib Paul Qingfeng Zhai Ajit K.Roy Liming Dai Department of Macromolecular Science and Engineering Case School of EngineeringCase Western Reserve UniversityClevelandOhioUSA Australian Carbon materials Centre(A-cmc) School of Chemical EngineeringUniversity of New South WalesSydneyNew South WalesAustralia materials and Manufacturing Directorate Air Force Research LaboratoryDaytonOhioUSA

Recently,carbon-based metal-free electrocatalysts(C‐MFECs)have drawn considerable research attention because of their attractive physicochemical characteristics,cost-effectiveness,and ability to convert and store energy *** intramolecular charge transfer among different parts of the carbon electrocatalyst and/or intermolecular charge transfer between elec-trocatalyst and electrolyte dictate the ultimate energy conversion *** results and theoretical analyses have demonstrated that rational design of metal-free carbon nanomaterials,coupled with proper in-tramolecular charge transfer through heteroatom doping,incorporation of Stone-Wales defects,and/or intermolecular charge transfer through adsorp-tion of appropriate molecules/moieties,can promote efficient *** this article,we will first provide the related theoretical principles and then present an overview on the rational design and development of C-MFECs for efficient charge transfer,followed by elucidating charge-transfer processes for different electrocatalytic reactions related to renewable energy conversion and environmental remediation ***,the current challenges and future perspectives in this exciting field will be discussed.

关键词： carbon catalyst charge transfer defect doping

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Rare earth monosilicates as oxidation resistant interphase for SiCf/SiC cmc:Investigation of SiC_(f)/Yb_(2)SiO_(5)model composites

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Journal of Advanced Ceramics 2022年第5期11卷 702-711页

作者： Xirui LV Mengkun YUE Xue FENG Xiaoyan LI Yumin WANG Jiemin WANG Jie ZHANG Jingyang WANG Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China AML Department of Engineering MechanicsTsinghua UniversityBeijing 100084China Center for Mechanics and materials Tsinghua UniversityBeijing 100084China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

Model composites consisting of SiC fiber and Yb_(2)SiO_(5)were processed by the spark plasma sintering(SPS)*** mechanical compatibility and chemical stability between Yb_(2)SiO_(5)and SiC fiber were studied to evaluate the potential application of Yb monosilicate as the interphase of silicon carbide fiber reinforced silicon carbide ceramic matrix composite(SiC_(f)/SiC cmc).Two kinds of interfaces,namely mechanical and chemical bonding interfaces,were achieved by adjusting sintering ***_(f)/Yb_(2)SiO_(5)interfaces prepared at 1450 and 1500℃exhibit high interface strength and debond energy,which do not satisfy the crack deflection criteria based on He-Hutchison *** spectrum analyzation indicates that the thermal expansion mismatch between Yb_(2)SiO_(5)and SiC contributes to high compressive thermal stress at interface,and leads to high interfacial *** layer at interface in model composite sintered at 1550℃is related to the diffusion promoted by high temperature and DC electric filed during *** is inspired that the interfacial parameters could be adjusted by introducing Yb_(2)Si_(2)O_(7)-Yb_(2)SiO_(5)interphase with controlled composition to optimize the mechanical fuse mechanism in SiC_(f)/SiC cmc.

关键词： silicon carbide fiber reinforced silicon carbide ceramic matrix composite(SiCf/SiC cmc) interphase rare earth(RE)silicates interfacial parameters

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Tunable strength of SiCf/β-Yb_(2)Si_(2)O_(7) interface for different requirements in SiCf/SiC cmc:Inspiration from model composite investigation

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Journal of materials Science & Technology 2021年第8期67卷 165-173页

作者： Xirui Lv Mengkun Yue Wenfan Yang Xue Feng Xiaoyan Li Yumin Wang Jiemin Wang Jie Zhang Jingyang Wang Shenyang National Laboratory for materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China School of materials Science and Engineering University of Science and Technology of ChinaShenyang 110016China AML Department of Engineering MechanicsTsinghua UniversityBeijing 100084China Center for Mechanics and materials Tsinghua UniversityBeijing 100084China Institute of Metal Research Chinese Academy of ScienceShenyang 110016China

Model composites consisting of Si C fiber embedded inβ-Yb_(2)Si_(2)O_(7) matrix were processed by Spark Plasma Sintering method and the feasibility of tunable Si Cf/Yb_(2)Si_(2)O_(7) interface in Si C-based cmcs were *** and strengthened Si Cf/Yb_(2)Si_(2)O_(7) interfaces were achieved by adjusting sintering *** indentation crack test and fiber push out experiments clearly demonstrated the different debonding mechanisms in the *** interfaces sintered at 1200 and 1250℃exhibited crack deflection at interface in indentation *** low debond energy at the interface,which were comparable to those of Py C or BN,satisfied the well-recognized interfacial debond and crack deflection criteria for *** interface was strengthened by atomic bonding in model composite sintered at 1450℃,leading to crack penetrating into Si C fiber and high debond *** strong interface may be promising in Si Cf/Si C cmc to withstand higher combustion temperature,because Yb_(2)Si_(2)O_(7) will provide plastic deformation capacity,which would serve as weak interphase for crack deflection and energy ***,it is possible to design the capability of Si C_(f)/RE_(2)Si_(2)O_(7) interface for different requirements by adjusting interfacial strength or debond energy to reach optimal mechanical fuse mechanism in SiC_(f)/SiC cmc.

关键词： SiCf/SiC composite Interphase Rare earth disilicate Tunable interface

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