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Microemulsion synthesis of Mesoporous β-tricalcium Phosphate Powder with a Novel System

Journal of Wuhan University of technology(materials Science) 2022年第4期37卷 773-778页

作者： BIELEC Monikaq HUANG An XIA Yuhao DAI Honglian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyShenzhen 5180ooChina Shenzhen Institute of Wuhan University of Technology Wuhan 430070China

The synthesis of mesoporous β-tricalcium phosphate(β-TCP)powder was performed by using the microemulsion approach,with hexadecyltrimethyl ammonium bromide(CTAB)/cyclohexane/n-octyl alcohol microemulsion *** influences of different pH values and calcination temperatures on the phase composition of the β-TCP powder were *** in vitro proliferation of bone marrow mesenchymal stem cells(BMSCs)in the suspensions of β-TCP powders with meso-structure was *** phase composition,mesoporous structure,powder morphology,cell morphology and the optical density(OD)were characterized through X-ray diffraction(XRD),field emission scanning electron microscopy(FESEM),Fourier transform infrared(FTIR)spectroscopy,Nadsorption-desorption isotherms,inverted phase contrast microscopy and Multiskan spectrum,*** mesoporous β-TCP powder with specific surface area of 12.85 m^(2)/g and the average pore size 7.11 nm was obtained through the microemulsion approach(100 g/L CTAB/250 mL/L cyclohexane/250 mL/L n-octyl alcohol)with a controlled pH of 7.0,after calcinating the powder at 800℃.It was confirmed that mesoporous β-TCP powder benefits the activity of BMSCs more than the non-mesoporous β-TCP powder.

关键词： β-tricalcium phosphate mesoporous microemulsion bone marrow mesenchymal stem cells

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Scalable graphene foam with ultrahigh conductivity for stabilizing Pt towards efficient hydrogen evolution

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Nano Research 2024年第8期17卷 6968-6976页

作者： Ming Zhao Meng Huang Huihui Jin Dayin He Wei Qian Zixin Zhang Daping He State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China School of Information Engineering Wuhan University of TechnologyWuhan 430070China School of Chemistry and Materials Science University of Science and Technology of ChinaHefei 230026China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya 572000China

For the carbon-based catalyst to be active and stable,especially in harsh electrochemical environments,the key is to decrease the concentration of defects and raise the degree of graphitization of the carbon ***,we develop a highly graphitized graphene foam with multiplicated structure to fabricate self-supporting Pt-based catalysts for efficient and stable hydrogen evolution reaction(HER)*** foam(GO-2850)is obtained through an ultra-high temperature treatment at 2850℃,with perfect graphene structure and extremely low defect,ensuring high electrical conductivity and corrosion ***,its multiplicated structure provides an inherently favorable environment for the dispersion of Pt nanoparticles(Pt NPs)and offers abundant channels for electrolyte infiltration during the catalytic *** a result,the as-prepared Pt/GO-2850 is far active and stable than the Pt NPs supported on commercial carbon paper(Pt/CP)counterpart toward catalyzing HER,exhibiting an outstanding activity and long-term durability(300 h@10 mA·cm^(−2))in acidic/alkaline/seawater *** can be attributed to the stronger interaction between the lower-defect GO-2850 substrate and Pt,as evidenced by characterization and theoretical *** work extends further insight into the design self-supporting catalysts of high activity and stability with promising prominent application toward green energy devices.

关键词： graphene foam high graphitization Pt nanoparticles hydrogen evolution reaction long-term stability

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Atomically dispersed dual Fe centers on nitrogen-doped bamboo-like carbon nanotubes for efficient oxygen reduction

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Nano Research 2022年第3期15卷 1966-1972页

作者： Ligang Ma Junlin Li Zhiwei Zhang Hao Yang Xueqin Mu Xiangyao Gu Huihui Jin Ding Chen Senlin Yan Suli Liu Shichun Mu School of Electronic Engineering Nanjing Xiaozhuang UniversityNanjing 211171China Nanjing Key Laboratory of Optometric Materials and Technology Jinling Institute of TechnologyNanjing 211169China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Key Laboratory of Advanced Functional Materials of Nanjing Nanjing Xiaozhuang UniversityNanjing 211171China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China

Interfacial atomic configuration between dual-metal active species and nitrogen-carbon substrates is of great importance for improving the intrinsic activity of catalysts toward oxygen reduction reaction(ORR).Thus,from the atomic-scale engineering we develop a high intrinsic activity ORR catalyst in terms of incorporating atomically dispersed dual Fe centers(single Fe atoms and ultra-small Fe atomic clusters)into bamboo-like N-doped carbon *** from atomically dispersed dual-Fe centers on the atomic interface of Fe-Nx/carbon nanotubes,the fabricated dual Fe centers catalyst exhibits an extremely high ORR activity(E_(onset)=1.006 V;E_(1/2)=0.90 V),beyond state-of-the-art Pt/***,this catalyst also shows a superior kinetic current density of 19.690 mA·cm^(−2),which is 7 times that of state-of-the-art Pt/***,based on the excellent catalyst,the primary Zn-air battery reveals a high power density up to 137 mW·cm^(−2) and sufficient potential cycling stability(at least 25 h).Undoubtedly,given the unique structure–activity relationship of dual-Fe active species and metal-nitrogen-carbon substrates,the catalyst will show great prospects in highly efficient electrochemical energy conversion devices.

关键词： atomic configuration single Fe atoms atomically dispersed Fe clusters N-doped bamboo-like carbon nanotubes oxygen reduction reaction

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Conversion of magnetron-sputtered sacrificial intermediate layer into a stable FeCo-LDH catalyst for oxygen evolution reaction

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Nano Research 2024年第5期17卷 4307-4313页

作者： Zhiquan Lang Guang-Ling Song Xingpeng Liao Wenzhong Huang Yixing Zhu Haipeng Wang Dajiang Zheng Center for Marine Materials Corrosion and Protection College of MaterialsXiamen UniversityXiamen 361005China Department of Ocean Science and Engineering Southern University of Science and TechnologyShenzhen 518055China State Key Laboratory of Physical Chemistry of Solid Surfaces Xiamen UniversityXiamen 361005China The University of Queensland St.LuciaOLD 4072Australia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China

Controllable and scalable preparation of electrocatalyst materials holds significant importance for their practical *** sputtering is a highly effective synthesis method,known for its producing uniform films and allowing easy control of component *** this paper,we propose an in-situ synthesis method for layered double hydroxide(LDH)electrocatalysts through sacrificing magnetron sputtered *** resulting FeCo-LDH catalyst demonstrated a low overpotential of only 300 mV at 10 mA·cm^(-2).Furthermore,we conducted spectroscopic analysis to investigate the surface changes of the catalysts during the oxygen evolution reaction(OER)*** findings indicated that the formation of Co oxyhydroxides plays a beneficial role in enhancing the catalytical performance of the FeCo-LDH for OER *** restructuring strategy of converting a magnetron-sputtered sacrificial film into a catalytical LDH introduces a new avenue to the synthesis of transition metal-based electrocatalysts.

关键词： magnetron co-sputtering surface reconstruction electrocatalyst oxygen evolution reaction

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Highly Selective Photocatalytic Conversion of Glucose on Holo-Symmetrically Spherical Three-Dimensionally Ordered Macroporous Heterojunction Photonic Crystal

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CCS Chemistry 2023年第8期5卷 1773-1788页

作者： Ting-Wei Wang Zhi-Wen Yin Yin-Hao Guo Fang-Yuan Bai Jun Chen Wenda Dong Jing Liu Zhi-Yi Hu Lihua Chen Yu Li Bao-Lian Su State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology430070 Wuhan Nanostructure Research Centre(NRC) Wuhan University of Technology430070 Wuhan Laboratory of Inorganic Materials Chemistry(CMI) University of NamurB-5000 Namur

Photocatalytic conversion of biomass is considered an effective,clean,and environmentally friendly route to obtain high-valued chemicals and ***,the limited conversion efficiency and poor selectivity are still the main bottlenecks for photocatalytic biomass ***,we report the highly selective photocatalytic conversion of glucose solution on holosymmetrically spherical three-dimensionally ordered macroporous TiO_(2)-CdSe heterojunction photonic crystal structure(s-TCS).The obtained s-TCS photocatalysts show excellent stability and strong light harvesting,uniform mass diffusion and exchange,and efficient photogenerated electrons/holes separation and *** optimized s-TCS-4 photocatalyst displays the highest photocatalytic performance for glucose oxidation and hydrogen *** glucose conversion,lactic acid selectivity,and yield on s-TCS-4 are about 95.9%,94.3%,and 96.4%,*** photocatalytic production of lactic acid for s-TCS-4(18.5 g/L)is 2.3 times higher than the pure spherical TiO_(2) photonic crystal without CdSe(s-TiO_(2),8.1 g/L),and the hydrogen production rate of s-TCS-4 is 9.4 times that of s-TiO_(2).For the first time,we reveal that the photocatalytic conversion of glucose to lactic acid is a third-order and four-electron-involved *** work could shed some new light on the efficient photocatalysis conversion of biomass to highly value-added products with high selectivity and yield,and simultaneously sustainable hydrogen evolution.

关键词： TiO_(2)-CdSe heterojunction spherical photonic crystal high-selective photocatalytic glucose conversion lactic acid photocatalytic H2 production four-electron involved reaction third-order reaction

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Rational design and synthesis of Cr_(1-x)Te/Ag_(2)Te composites for solid-state thermoelectromagnetic cooling near room temperature

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Chinese Physics B 2024年第5期33卷 580-586页

作者：孙笑晨谢承昊陈思汗万京伟谭刚健唐新峰 State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China International School of Materials Science & Engineering Wuhan University of TechnologyWuhan 430070China

materials with both large magnetocaloric response and high thermoelectric performance are of vital importance for all-solid-state thermoelectromagnetic *** two properties,however,hardly coexist in single phase materials except previously reported hexagonal Cr_(1-x)Te half metal where a relatively high magnetic entropy change(-△S_(M))of~2.4 J·kg^(-1)·K^(-1)@5 T and a moderate thermoelectric figure of merit(ZT)of~1.2×10^(-2)@300 K are simultaneously *** we aim to increase the thermoelectric performance of Cr_(1-x)Te by compositing with semiconducting Ag_(2)*** is discovered that the in-situ synthesis of Cr_(1-x)Te/Ag_(2)Te composites by reacting their constitute elements above melting temperatures is unsuccessful because of strong phase ***,at elevated temperatures(T>800 K),Cr_(1-x)Te has a much lower deformation energy than Ag_(2)Te and tends to become more Cr-deficient by capturing Te from Ag_(2)***,Ag is insufficiently reacted and as a metal it deteriorates *** then rationalize the synthesis of Cr_(1-x)Te/Ag_(2)Te composites by ex-situ mix of the pre-prepared Cr_(1-x)Te and Ag_(2)Te binary compounds followed by densification at a low sintering temperature of 573 K under a pressure of 3.5 *** show that by compositing with 7 mol%Ag_(2)Te,the Seebeck coefficient of Cr_(1-x)Te is largely increased while the lattice thermal conductivity is considerably reduced,leading to 72%improvement of *** comparison,-△S_(M)is only slightly reduced by 10%in the *** work demonstrates the potential of Cr_(1-x)Te/Ag_(2)Te composites for thermoelectromagnetic cooling.

关键词： thermoelectromagnetic cooling thermoelectric magnetocaloric composite chromium telluride

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In-situ selective surface engineering of graphene micro-supercapacitor chips

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Nano Research 2022年第2期15卷 1492-1499页

作者： Yiming Chen Minghao Guo Lin Xu Yuyang Cai Xiaocong Tian Xiaobin Liao Zhaoyang Wang Jiashen Meng Xufeng Hong Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528200China Faculty of Materials Science&Chemistry China University of GeosciencesWuhan 430074China

Surface modification of graphene oxide(GO)is a powerful strategy to develop its energy density for electrochemical energy ***,pre-modified GO always exhibits unsatisfactory hydrophilia and its ink-relevant utilization is extremely *** GO ink is widely utilized in fabricating micro energy storage devices via extrusion-based 3D-printing,simultaneously obtaining satisfactory hydrophilia and high energy density still remains a *** this work,an in-situ surface engineering strategy was employed to enhance the performance of GO micro-supercapacitor *** dimensionally printed GO micro-supercapacitor chips were treated with pyrrole monomer to achieve selective and spontaneous anchoring of polypyrrole on the microelectrodes without affecting interspaces between the finger *** interface-reinforced graphene scaffolds were edge-welded and exhibited a considerably improved specific capacitance,from 13.6 to 128.4 mF·cm^(-2).These results are expected to provide a new method for improving the performance of micro-supercapacitors derived from GO inks and further strengthen the practicability of 3D printing techniques in fabricating energy storage devices.

关键词： 3D-printing in-situ modification selective surface engineering edge-welded graphene micro-supercapacitors

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Catalytic hosts with strong adsorption strength for long shelf-life lithium-sulfur batteries under lean electrolyte

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Nano Research 2023年第1期16卷 427-438页

作者： Siyuan Zhao Huayu Pei Quan Yang Kangli Liu Yuanyuan Huang Zhuo Wang Guosheng Shao Jinping Liu Junling Guo State Center for International Cooperation on Designer Low-carbon&Environmental Materials School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Zhengzhou Materials Genome Institute Xingyang 450100China School of Chemistry Chemical Engineering and Life ScienceState Key Laboratory of Advanced Technology for Materials Synthesis and ProcessingWuhan University of TechnologyWuhan 430070China

Low electrolyte/sulfur ratio(E/S)is an important factor in increasing the energy density of lithium-sulfur batteries(LSBs).Recently,the E/S has been widely lowered using catalytic hosts that can suppress“shuttle effect”during cycling by relying on a limited adsorption ***,the shelf-lives of these cathodes have not yet received ***,we show that the selfdischarge of sulfur cathodes based on frequently-used catalytic hosts is serious under low E/S because the“shuttle effect”during storage process caused by polysulfides(PSs)disproportionation cannot be suppressed using a limited adsorption *** further prove that the adsorption strength toward PSs,which is unfortunately weak in commonly-used catalytic hosts,is critical for effectively hindering the disproportionation of the ***,to verify this conclusion,we prepare a sulfur-doped titanium nitride(S-TiN)catalytic array *** the adsorption strength and catalytic activity of TiN can be improved by S doping simultaneously,the constructed S/S-TiN cathodes under a low E/S(6.5μL·mg−1)exhibit better shelf-life and cycle-stability than those of S/TiN *** work suggests that enhancing the adsorption strength of catalytic hosts,while maintaining their function to reduce E/S,is crucial for practical LSBs.

关键词： lithium-sulfur battery low electrolyte/sulfur ratio(E/S) self-discharge catalytic host adsorption strength

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Peridynamic Modeling of Brittle Fracture in Mindlin-Reissner Shell Theory

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 715-746页

作者： Sai Li Xin Lai Lisheng Liu Department of Engineering Structure and Mechanics Wuhan University of TechnologyWuhan430070China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan University of TechnologyWuhan430070China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan430070China

In this work,wemodeled the brittle fracture of shell structure in the framework of Peridynamics Mindlin-Reissener shell theory,in which the shell is described by material points in themean-plane with its drilling rotation neglected in kinematic *** improve the numerical accuracy,the stress-point method is utilized to eliminate the numerical instability induced by the zero-energy mode and *** crack surface is represented explicitly by stress points,and a novel general crack criterion is proposed based on *** of the critical stretch used in common peridynamic solid,it is convenient to describe thematerial failure by using the classic constitutive model in continuum *** this work,a concise crack simulation algorithm is also provided to describe the crack path and its development,in order to simulate the brittle fracture of the shell *** examples are presented to validate and demonstrate our proposed *** reveal that our model has good accuracy and capability to represent crack propagation and branch spontaneously.

关键词： Peridynamic brittle fracture Reissner-Mindlin shell theory

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TiO_(2)/In_(2)S_(3)S-scheme photocatalyst with enhanced H_(2)O_(2)-production activity

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Nano Research 2023年第4期16卷 4506-4514页

作者： Yi Yang Bei Cheng Jiaguo Yu Linxi Wang Wingkei Ho State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Laboratory of Solar Fuel Faculty of Materials Science and ChemistryChina University of Geosciences388 Lumo RoadWuhan 430074China Department of Science and Environmental Studies The Education University of Hong KongTai PoHong Kong 999077China

Photocatalytic production of hydrogen peroxide(H_(2)O_(2))is an ideal pathway for obtaining solar ***,an S-scheme heterojunction is constructed in hybrid TiO_(2)/In_(2)S_(3)photocatalyst,which greatly promotes the separation of photogenerated carriers to foster efficient H_(2)O_(2)*** composite photocatalysts show a high H_(2)O_(2)yield of 376μmol/(L·h).The mechanism of charge transfer and separation within the S-scheme heterojunction is well studied by computational methods and *** functional theory and in-situ irradiated X-ray photoelectron spectroscopy results reveal distinct features of the S-scheme heterojunction in the TiO_(2)/In_(2)S_(3)hybrids and demonstrate charge transfer *** density functional theory calculation and electron paramagnetic resonance results suggest that O_(2)reduction to H_(2)O_(2)follows stepwise one-electron ***_(2)S_(3)shows a much stronger interaction with O_(2)than TiO_(2)as well as a higher reduction ability,serving as the active sites for H_(2)O_(2)*** work provides a novel design of S-scheme photocatalyst with high H_(2)O_(2)evolution efficiency and mechanistically demonstrates the improved separation of charge carriers.

关键词： step-scheme heterojunction photocatalytic H_(2)O_(2)production TiO_(2)/In_(2)S_(3)nanofibres

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