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One-step floating conversion of biomass into highly graphitized and continuous carbon nanotube yarns

Green Energy & Environment 2023年第6期8卷 1711-1718页

作者： Gongxun Zhai Qianqian Wang Fuyao Liu Zexu Hu Chao Jia Dengxin Li Hengxue Xiang Meifang Zhu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China

The rapid growth of the demand for carbon nanotubes(CNTs) has greatly promoted their large-scale synthesis and development. However,the continuous production of CNT fibers by floating catalyst chemical vapor deposition(FCCVD) requires a large amount of non-renewable carbon sources. Here, the continuous production of highly graphitized CNT yarns from biomass tannic acid(TA) is reported. The chelation of TA and catalyst promotes the rapid cracking of biomass into carbon source gas, and the pyrolysis cracking produces the reducing gas, which solves the problems of the continuous production of CNT yarns using biomass. Through simple twisting, the mechanical strength of CNT yarn can reach 886 ± 46 MPa, and the electrical conductivity and graphitization(IG/ID) can reach 2 × 10^(5)S m^(-1)and 6.3, respectively. This work presents a promising solution for the continuous preparation of CNT yarns based on green raw material.

关键词： Carbon nanotube Tannic acid Biomass Pyrolysis Floating catalyst chemical vapor deposition

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Tailor-made high elasticity and low-hysteresis hydrogels based on asymmetric H-bonding crosslinking for wearable applications

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Science China Chemistry 2025年第3期68卷 1117-1125页

作者： Xiaofang Shi Nan Shi Miaomiao Dang Chengyu Ji Yingjie Li Peiyi Wu Zhiguo Hu Collaborative Innovation Centre of Henan Province for Green Manufacturing of Fine Chemicals Henan Engineering Laboratory of Chemical Pharmaceutical and Biomedical MaterialsSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiang 453007China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of ChemistryChemical Engineering and Biotechnology&Center for Advanced Low-dimension MaterialsDonghua UniversityShanghai 201620China

The conventional method of fabricating hydrogels constantly confronts the conflict between elasticity and toughness,limiting their repetitive *** the desired elasticity through a simple and low-cost approach is a significant challenge for hydrogels,particularly through rational molecular ***,low-hysteresis and high-toughness hydrogels are developed from the design of a new feature monomer,N-acryloylethylsemicarbazide(NACE).Based on a concept of“asymmetric Hbonding design”,the unique double and triple H-bonding of NACE can result in a novel asymmetric crosslinking polymer with alternating strong and weak H-bonding *** NACE is copolymerized with acrylamide(AM)to regulate the mechanical properties of hydrogel via H-bonding *** P(NACE-AM)ionic hydrogels are obtained simply and rapidly via one-step photopolymerization without a chemical cross-linking *** P(NACE-AM)hydrogels combine superb mechanical elasticity and toughness,and excellent ionic conductivity,showing great potential as durable ionic conductive devices for wearable utilization.

关键词： new feature monomer asymmetric H-bonding low-hysteresis hydrogel wearable sensor

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Electrospinning engineering of gas electrodes for high-performance lithium-gas batteries

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Carbon Energy 2024年第10期6卷 353-398页

作者： Jingzhao Wang Xin Chen Jianan Wang Xiangming Cui Ze Wang Guangpeng Zhang Wei Lyu Maxim Shkunov S.Ravi P.Silva Yaozu Liao Kai Yang Wei Yan State Key Laboratory of Multiphase Flow in Power Engineering Department of Environmental Science and EngineeringSchool of Energy and Power EngineeringXi'an Jiaotong UniversityXi'anChina Advanced Technology Institute University of SurreyGuildfordSurreyUK State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghaiChina

Lithium-gas batteries(LGBs)have garnered significant attention due to their impressive high-energy densities and unique gas conversion ***,the practical application of LGBs faces substantial challenges,including sluggish gas conversion kinetics inducing in low-rate performance and high overpotential,along with limited electrochemical reversibility leading to poor cycle *** imperative task is to develop gas electrodes with remarkable catalytic activity,abundant active sites,and exceptional electrochemical ***,a versatile and well-established technique for fabricating fibrous nanomaterials,has been extensively explored in LGB *** this work,we emphasize the critical structure-property for ideal gas electrodes and summarize the advancement of employing electrospun nanofibers(NFs)for performance enhancement in *** elucidating the fundamental principles of LGBs and the electrospinning technique,we focus on the systematic design of electrospun NF-based gas electrodes regarding optimal structural fabrication,catalyst handling and activation,and catalytic site optimization,as well as considerations for large-scale *** demonstrated principles and regulations for electrode design are expected to inspire broad applications in catalyst-based energy applications.

关键词： carbon nanofibers electrocatalyst electrospinning gas electrodes metal-gas batteries

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The mortise and tenon structure enabling lamellar carbon composites of ultra-high bending strength

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Journal of materials Science & Technology 2023年第2期133卷 249-258页

作者： Zhaojun Li Kunpeng Lin Hailiang Fang Hui Yu Junzhuo Wang Yimin Miao Lianjun Wang Jianlin Li Wan Jiang State Key Laboratory of Marine Resource Utilization in South China Sea School of Materials Science and EngineeringHainan UniversityHaikou 570228China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China School of Materials and Chemical Engineering Pingxiang UniversityPingxiang 337055China

Carbon materials are important but find little application in bending components due to their unsatisfy-ing bending strength(300-500 MPa).To fabricate carbon composites of high bending strength is a tough task,even using carbon fibers(CFs)structures as *** we report lamellar carbon com-posites of ultra-high bending strength(>1.2 GPa)produced from CFs cloths coated with nano-diamond(ND)particles by spark plasma sintering(SPS).When NDs are sandwiched between CFs cloths,some ND particles penetrate into interstices between *** the sintering,the ND particles are transformed into graphite onions;this transformation is associated with an active state of carbon atoms participating in the *** a result,the carbon onions strongly bond the CFs together,helping consolidate the com-pacts into strong lamellar carbon composite *** produced graphite onions from the NDs located at crossings of CFs tows form a robust mortise and tenon structure,which helps the bending strength of the lamellar composite from the compact of 40 wt.%NDs exceed 1.2 *** as-prepared compos-ite possesses the highest specific bending strength of all current high temperature structural materials reported so *** work may pave a new way for high performance carbon materials.

关键词： Carbon fibers(CFs) Diamond Carbon composite Strength

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In situ irradiated XPS investigation on S-scheme TiO_(2)/Bi_(2)S_(3)photocatalyst with high interfacial charge separation for highly efficient photothermal catalytic CO_(2)reduction

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Journal of materials Science & Technology 2024年第22期189卷 86-95页

作者： Jing Yang Juan Wang Guohong Wang Kai Wang Jinmao Li Li Zhao Hubei Key Laboratory of Pollutant Analysis and Reuse Technology College of Chemistry and Chemical EngineeringHubei Normal UniversityHuangshi 435002China Hubei Key Laboratory of Polymer Materials School of Materials Science and EngineeringHubei UniversityWuhan 430062China

The combination of S-scheme heterojunction and photothermal effect is a promising strategy to achieve efficient CO_(2)photoreduction into solar fuel due to the boosted charge carrier separation efficiency and faster surface reaction ***,unique photothermal-coupled TiO_(2)/Bi_(2)S_(3)S-scheme heterojunction nanofibers were fabricated and applied to a full-spectrum CO_(2)photoreduction *** functional theory calculation and experimental analyses have confirmed the generation of the internal electric field and the S-scheme electron transfer pathway,leading to a highly efficient charge carrier *** to the excellent photothermal conversion capacity of Bi_(2)S_(3),the photogenerated electron transfer rate,and surface reaction rate were further accelerated in hybrid *** the synergistic effect of Sscheme heterojunction and photothermal effects,the optimal TiO_(2)/Bi_(2)S_(3)nanofibers achieved 7.65μmol h^(–1)of CH_(4)production rate,which is 5.24 times higher than that of pristine TiO_(2).Moreover,the morphology reconstruction of Bi_(2)S_(3)in hybrids facilitates the CH4 selectivity was significantly improved from 64.2%to 88.7%.Meanwhile,the CO_(2)photoreduction reaction route over TiO_(2)/Bi_(2)S_(3)nanofibers was investigated based on in-situ Fourier transform infrared *** work provides some useful hints for designing highly efficient photothermal-coupled photocatalysts for CO_(2)photoreduction.

关键词： TiO_(2)/Bi_(2)S_(3) S-scheme heterojunction Photocatalytic CO_(2)reduction Photothermal effect

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Enhanced plasmonic absorption of Pt cuboctahedra-WO_(3)nanohybrids used as visible light photocatalysts for overall water splitting

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Nano Research 2023年第4期16卷 5919-5928页

作者： Qiaoling Chen Yiwei Tan State Key Laboratory of Materials-Oriented Chemical Engineering School of Chemistry and Chemical EngineeringNanjing Tech UniversityNanjing 211816China

Localized surface plasmon resonance(LSPR)effects of nanoscale plasmonic metals/semiconductor composites have been extensively applied into visible light ***,Pt nanoparticles(NPs)with the visible LSPR absorption maxima have rarely been used as a photosensitizer to facilitate photocatalytic reactions,especially the photocatalytic overall water splitting(POWS)reaction,presumably because they feature weak light ***,we present that the increased plasmonic absorption and local field enhancement can be achieved in the wide visible range by exploiting the simulated and experimental expressions of Pt nanocuboctahedra and Pt cuboctahedra-WO_(3)nanohybrids(Pt-WO3).First,monodisperse Pt cuboctahedra with different sizes,a hierarchical WO_(3)nanoarchitecture composed of radially patterned WO_(3)nanopillars,and Pt-WO_(3)were systematically ***,visible plasmonic Pt-WO_(3)photocatalysts were employed in the POWS tests and exhibited the significant activity enhancement in the visible light *** apparent quantum efficiency(AQE)of greater than 7%within the range of visible light has been achieved for the optimal Pt-WO3.

关键词： localized surface plasmon resonance plasmonic photocatalysis overall water splitting plasmonic Pt nanoparticles WO_(3)

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A novel septenary high-entropy(oxy)hydroxide electrocatalyst for boosted oxygen evolution reaction

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Journal of Materiomics 2024年第2期10卷 348-354页

作者： Lingjie Zhang Fangshi Fan Xiaomin Song Weiwei Cai Jie Ren Hui Yang Ningzhong Bao State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhouZhejiang310027China State Key Laboratory of Material-Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjingJiangsu210009China

High-entropy materials(HEMs)have attracted extensive attention in the field of electrochemical catal-ysis due to their unique ***,the preparation of high-entropy catalysts typically relies on high-temperature,energy-intensive,and time-consuming synthesis methods due to their compositional *** this study,a facile low-temperature electrochemical reconstruction approach is adopted to synthesize Ag-decorated septenary Co-Cu-Fe-Mo-Zn-Ag-Ru high-entropy(oxy)hydroxide electro-catalysts for oxygen evolution reaction(OER).By introducing Ag and Ru elements and implanting Ag nanoparticles to co-regulate the electronic structure of the catalysts,the as-prepared catalyst achieves remarkable OER performance with a low overpotential of 298 mV at 100 mA/cm^(2)and a small Tafel slope of 30.1 mV/dec in 1 mol/L *** work offers a valuable strategy for developing high-performance high-entropy OER electrocatalysts.

关键词： High-entropy materials Septenary metallic(oxy)hydroxide Oxygen evolution reaction Electrochemical reconstruction Oxygen vacancy

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Challenges and opportunities in 2D materials for high-performance aqueous ammonium ion batteries

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National Science Review 2025年第2期12卷 348-365页

作者： Jie Xu Tao Liu Xusheng Dong Xiaoyi Dong Wanhai Zhou Xiaojie Li Dongliang Chao Zhen Zhou Ruizheng Zhao EngineeringResearch Center of Advanced Functional Material Manufacturing of Ministry of Education School of Chemical EngineeringZhengzhou University Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials State Key Laboratory of Molecular Engineering of Polymers and School of Chemistry and Materials Fudan University State Key Laboratory of Inorganic Synthesis and Preparative Chemistry College of Chemistry Jilin University

Aqueous ammonium ion batteries（AAIBs） have attracted considerable attention due to their high safety and rapid diffusion kinetics. Unlike spherical metal ions, NH4+forms hydrogen bonds with host materials,leading to a unique storage mechanism. A variety of electrode materials have been proposed for AAIBs, but their performance often falls short in terms of future energy storage needs. Hence, there is a critical need to design and develop advanced electrode materials for AAIBs. 2D materials, with their tunable interlayer spacing, remarkable interfacial chemistry and abundant surface functional groups, are an ideal choice for electrode materials for NH4+storage. This review highlights the latest research on 2D electrode materials for AAIBs, providing insights into their working principles, NH4+storage mechanisms and control strategies for designing high-performance AAIBs. Furthermore, a summary and future perspectives on 2D electrode materials in the development of AAIBs are provided, aiming to promote the advancement of high-performance AAIBs.

关键词： aqueous ammonium ion batteries non-metallic charge carriers 2D electrode materials storage mechanisms control strategies

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Graphdiyne/hierarchical flower-like Sr2Co2O5 S-scheme heterojunction for enhanced photocatalytic hydrogen evolution

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材料科学技术（英文版） 2025年第10期213卷 241-251页

作者： Zhengyu Zhou Jing Wang Maierhuban Reheimujiang Zhiliang Jin School of Chemistry and Chemical Engineering Ningxia Key Laboratory of Solar Chemical Conversion TechnologyKey Laboratory for Chemical Engineering and TechnologyState Ethnic Affairs CommissionNorth Minzu UniversityYinchuan 750021PR China School of Materials Science & Engineering Tianjin University of TechnologyTianjin 300384PR China

The activity of photocatalysts can be significantly regulated by designing micro-scale interfacial *** present study demonstrates the skillful construction of a graphdiyne/Sr2Co2O5 S-scheme heterojunction,exhibiting exceptional stability,excellent proton adsorption,and remarkable photocat-alytic *** the basis of in-situ XPS and calculation of work function,it is proved that the electron migration path between the interface of graphdiyne and Sr2Co2O5 conforms to the S-scheme hetero-junction *** recombination rate of photogenerated carriers is significantly reduced by virtue of the synergistic effect of the internal electric field and band edge bending while preserving the in-herent redox ability of the *** strong coupling between layered graphdiyne and hierarchical flower-like Sr2Co2O5 effectively enhances the specific surface area of graphdiyne/Sr2Co2O5 heterojunction,thereby facilitating H2O *** with experiments and DFT calculations,it was found that both graphdiyne and Sr2Co2O5 have a direct band gap,which makes their electronic transitions with-out the assistance of phonons,thus improving the efficiency of solar energy *** study offers insights into the potential application of graphdiyne and metal oxides in the field of photocatalytic hy-drogen evolution.

关键词： Hydrogen evolution Graphdiyne In-situ XPS S-scheme heterojunction DFT

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Intrinsic pentagon defect engineering in multiple spatial-scale carbon frameworks for efficient triiodide reduction

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Journal of Energy Chemistry 2024年第8期95卷 20-28,I0002页

作者： Siyi Hou Xuedan Song Chang Yu Jiangwei Chang Yiwang Ding Yingbin Liu Xiubo Zhang Weizhe Liu Jieshan Qiu State Key Lab of Fine Chemicals Liaoning Key Lab for Energy Materials and Chemical EngineeringFrontier Science Center for Smart MaterialsSchool of Chemical EngineeringDalian University of TechnologyDalian 116024LiaoningChina Liaoning Key Lab for Energy Materials and Chemical Engineering Frontier Science Center for Smart MaterialsSchool of ChemistryDalian University of TechnologyDalian 116024LiaoningChina State Key Laboratory of Chemical Resource Engineering College of Chemical EngineeringBeijing University of Chemical TechnologyBeijing 100029China

Intrinsic topological defect engineering has been proven as a promising strategy to elevate the electrocatalytic activity of carbon ***,the controllable construction of high-density and specific topological defects in carbon frameworks to reveal the relationship between reactivity and defect structure remains a challenging ***,the intrinsic pentagon carbon sites that can favor electron overflow and enhance their binding affinity towards the intermediates of catalytic reaction are firstly presented by the work function and the p-band center *** experimentally verify this,the cage-opening reaction of fullerene is proposed and utilized for synthesizing carbon quantum dots with specific pentagon configuration(CQDs-P),subsequently utilizing CQDs-P to modulate the micro-scale defect density of three-dimensional reduced graphene oxide(rGO)viaπ-π*** multiple spatial-scale rGO-conjugated CQDs-P structure simultaneously possesses abundant pentagon and edge defects as catalytic active sites and long-range-orderedπelectron delocalization system as conductive *** defects-rich CQDs-P/rGO-4 all-carbon-based catalyst exhibits superb catalytic activity for triiodide reduction reaction with a high photoelectric conversion efficiency of 8.40%,superior to the Pt reference(7.97%).Theoretical calculations suggest that pentagon defects in the carbon frameworks can promote charge transfer and modulate the adsorption/dissociation behavior of the reaction intermediates,thus enhancing the electrocatalytic activity of the *** work confirms the role of intrinsic pentagon defects in catalytic reactions and provides a new insight into the synthesis of defects-rich carbon catalysts.

关键词： Defect engineering Pentagon carbon Carbon quantum dots Electrocatalytic activity Triiodide reduction

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