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Cu_(3)P nanoparticles confined in nitrogen/phosphorus dual-doped porous carbon nanosheets for efficient potassium storage

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Journal of Energy Chemistry 2022年第3期31卷 339-347,I0009页

作者： Yuanxing Yun Baojuan Xi Yu Gu Fang Tian Weihua Chen Jinkui Feng Yitai Qian Shenglin Xiong Key Laboratory of Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringState Key Laboratory of Crystal MaterialsShandong UniversityJinan 250100ShandongChina Key Laboratory of Material Processing and Mold of Ministry of Education Zhengzhou UniversityZhengzhou 450001HenanChina Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityJinan 250061ShandongChina

Immobilizing primary electroactive nanomaterials in porous carbon matrix is an effective approach for boosting the electrochemical performance of potassium-ion batteries (PIBs) because of the synergy among functional components. Herein, an integrated hybrid architecture composed of ultrathin Cu_(3)P nanoparticles (~20 nm) confined in porous carbon nanosheets (Cu_(3)P⊂NPCSs) as a new anode material for PIBs is synthesized through a rational self-designed self-templating strategy. Benefiting from the unique structural advantages including more active heterointerfacial sites, intimate and stable electrical contact, effectively relieved volume change, and rapid K^(+) ion migration, the Cu_(3)P⊂NPCSs indicate excellent potassium-storage performance involving high reversible capacity, exceptional rate capability, and cycling stability. Moreover, the strong adsorption of K^(+) ions and fast potassium-ion reaction kinetics in Cu_(3)P⊂NPCSs is verified by the theoretical calculation investigation. Noted, the intercalation mechanism of Cu_(3)P to store potassium ions is, for the first time, clearly confirmed during the electrochemical process by a series of advanced characterization techniques.

关键词： Cu_(3)P Potassium-ion batteries Nitrogen/phosphorus dual-doped porous carbon sheets Intercalation mechanism Heterointerface

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Triggering heteroatomic interdiffusion in one-pot-oxidation synthesized NiO/CuFeO_(2) heterojunction photocathodes for efficient solar hydrogen production from water splitting

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Rare Metals 2023年第3期42卷 853-861页

作者： Fei Han Wei Xu Chun-Xu Jia Xiang-Tao Chen Ying-Peng Xie Chao Zhen Gang Liu Key Laboratory of Resources Chemicals and Materials(Shenyang University of Chemical Technology) Ministry of EducationShenyang 110142China 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 Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China

Delafossite CuFeO_(2) is a promising photocathode material for cost-efficiently photoelectrochemical(PEC)water splitting,but the unfavorable conductivity and fast recombination dynamics of photogenerated carriers limit its PEC activity for water ***,we developed a heterostructure photocathode consisting of the Cu-doped NiO(Cu:NiO)hole selective layer(HSL)and Ni-doped CuFeO_(2)(Ni:CuFeO_(2))active layer by simply annealing a homogeneous Cu-Fe oxalate layer grown on the Ni film deposited on the fluorine doped tin oxide(FTO)*** obtained heterostructure of Cu:NiO/Ni:CuFeO_(2) with enhanced charge carrier transportability and high-quality interface greatly promotes the separation of photogenerated ***,the Cu:NiO/Ni:CuFeO_(2) photocathode exhibits a high photocurrent density of~0.9 mA·cm^(-2 )at 0.2 V(*** hydrogen electrode,RHE),outperforming most of the reported bare CuFeO_(2) photocathodes in the *** the photocurrent density can be further improved to 1.2 mA·cm^(-2) after decorating NiSx cocatalyst.

关键词： Photoelectrochemical(PEC)water splitting NiO/CuFeO_(2)hybrid photocathode Heteroatomic interdiffusion

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Modulating charge separation and transfer for high-performance photoelectrodes via built-in electric field

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International Journal of Minerals,Metallurgy and materials 2024年第5期31卷 1126-1146页

作者： Houyan Cheng Peng Liu Yuntao Cui Ru Ya Yuxiang Hu Jinshu Wang Key Laboratory of Advanced Functional Materials of Education Ministry of China Faculty of Engineering and ManufacturingBeijing University of TechnologyBeijing 100124China Key Laboratory of Cryogenic Science and Technology and Beijing Key Lab of Cryo-Biomedical Engineering Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China Inner Mongolia Academy of Science and Technology Hohhot 010020China

Constructing a built-in electric field has emerged as a key strategy for enhancing charge separation and transfer,thereby improving photoelectrochemical ***,considerable efforts have been devoted to this *** review systematically summarizes the impact of built-in electric fields on enhancing charge separation and transfer mechanisms,focusing on the modulation of built-in electric fields in terms of depth and ***,mechanisms and tuning strategies for built-in electric fields are ***,the state-of-the-art works regarding built-in electric fields for modulating charge separation and transfer are summarized and categorized according to surface and interface ***,current strategies for constructing bulk built-in electric fields in photoelectrodes are explored,and insights into future developments for enhancing charge separation and transfer in high-performance photoelectrochemical applications are provided.

关键词： photoelectrochemical water splitting bulk built-in electric field cation intercalation charge separation and transfer

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Extra-conventional strengthening mechanisms in non-recrystallized grains of an extruded Mg-Gd-Zr alloy

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Journal of Magnesium and Alloys 2024年第11期12卷 4561-4573页

作者： Qiang Yang Shuhui Lv Kai Guan Zefeng Xie Xin Qiu State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022PR China School of Materials Science and Engineering Changchun University of Science and Technology130022PR China Key Laboratory of Automobile Materials of Ministry of Education&School of Materials Science and Engineering Jilin UniversityChangchun 130022PR China

Mg-RE(RE=rare earth)based alloys generally exhibit outstanding mechanical ***,their high-strength seems to be unexplained using classic strengthening mechanisms in some ***,a Mg^(-1)3Gd-0.4Zr(wt%)alloy that was fabricated by a conventional differential thermal extrusion plus artificial aging treatment exhibits ultra-high yield strength over 510 MPa in both tension and *** using Cs-corrected scanning transmission electron microscopy(STEM)show two unusual microstructures in non-recrystallized grains as:a large density of basal stacking faults(SFs)and profuse distortion areas(DAs).Atomic-resolution STEM imaging indicates that basal SFs are consisted of two types of intrinsic SFs,namely I_(1) and I_(2),and DAs are self-assembled by(c)and(c+a)screw *** strengthening mechanisms are analogous to grain boundary strengthening and dispersion strengthening,respectively,contributing satisfactory yield-strength increments of~46 MPa and~76 MPa,***,DAs improved aging hardening by inducing novel clusters at DA-related boundaries,or increasing the number density ofβH'precipitate and promoting their distribution along a certain *** work supplements the strengthening mechanisms in traditional high-strength Mg-RE(-Zr)based alloys and provides novel insights in the development of ultra-high-strength Mg alloys.

关键词： Magnesium alloys Transmission electron microscopy(TEM) Microstructure Strengthening mechanism Distortion area

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2D Undulated Metal Hydrogen-Bonded Organic Frameworks with Self-Adaption Interlayered Sites for Highly Efficient C–C Coupling in the Electrocatalytic CO2 Reduction

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Nano-Micro Letters 2025年第7期17卷 231-241页

作者： Jianning Lv Wenrui Li Shuai Li Shuo Xu Zunhang Lv Zhejiaji Zhu Lu Dai Bo Wang Pengfei Li Key Laboratory of Cluster Science Ministry of Education Beijing Key Laboratory of Photoelectronic/ElectrophotonicSchool of Chemistry and Chemical EngineeringBeijing Institute of Technology Petrochina Petrochemical Research Institute Advanced Technology Research Institute (Ji'nan) Beijing Institute of Technology Advanced Research Institute of Multidisciplinary Science Beijing Institute of Technology (Zhuhai)

The hydrogen-bonded organic frameworks （HOFs） as a new type of porous framework materials have been widely studied in various ***,the lack of appropriate active sites,low intrinsic conductivity,and poor stability limited their performance in the field of ***,we designed two 2D metal hydrogen-bonded organic frameworks (2D–M–HOF,M=Cu2+or Ni2+) with coordination compounds based on 2,3,6,7,14,15-hexahydroxyl cyclotricatechylene and transition metal ions (Cu2+and Ni2+),*** crystal structure of 2D–Cu–HOF is determined by continuous rotation electron diffraction,indicating an undulated 2D hydrogen-bond network with interlayeredπ-π*** flexible structure of 2D–M–HOF leads to the formation of self-adaption interlayered sites,resulting in superior activity and selectivity in the electrocatalytic conversion of CO2to C2products,achieving a total Faradaic efficiency exceeding 80%due to the high-efficiency C–C *** experimental results and density functional calculations verify that the undulated 2D–M–HOF enables the energetically favorable formation of*OCCHO *** work provides a promising strategy for designing HOF catalysts in electrocatalysis and related processes.

关键词： Electrocatalytic CO2 reduction Flexible structure Hydrogen-bonded organic frameworks Self-adaption interlayered sites

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Degradation and biocompatibility of one-step electrodeposited magnesium thioctic acid/magnesium hydroxide hybrid coatings on ZE21B alloys for cardiovascular stents

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Journal of Magnesium and Alloys 2024年第1期12卷 120-138页

作者： Zhao-Qi Zhang Bing-Zhi Li Pei-Duo Tong Shao-Kang Guan Li Wang Zheng-Hui Qiu Cun-Guo Lin Rong-Chang Zeng School of Material Science and Engineering&Henan Key Laboratory of Advanced Magnesium Alloy&Key Laboratory of Materials Processing and Mold Technology(Ministry of Education) Zhengzhou University100 Science RoadZhengzhou 450001China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research InstituteQingdao 266101China Corrosion Laboratory for Light Metals College of Material Science and EngineeringShandong University of Science and TechnologyQingdao 266590China

Constructing a functional hybrid coating appears to be a promising strategy for addressing the poor corrosion resistance and insufficient endothelialization of Mg-based ***,the steps for preparing composite coatings are usually complicated and ***,a novel composite coating,composed of bioactive magnesium thioctic acid(MTA)layer formed by deposition and corrosion-resistant magnesium hydroxide(Mg(OH)_(2))layer grown in situ,is simply fabricated on ZE21B alloys via one-step *** electron microscopy(SEM)shows that the electrodeposited coating has a compact and uniform *** the high adhesion of the MTA/Mg(OH)_(2)hybrid coating is also confirmed by the micro-scratch *** test,scanning kelvin probe(SKP),and hydrogen evolution measurement indicate that the hybrid coating effectively reduces the degradation rate of Mg *** experiment and cell culture trial detect that the composite coating is of fine ***,the preparation mechanism of MTA/Mg(OH)_(2)hybrid coatings is discussed and *** coating shows a great potential application for cardiovascular stents.

关键词： Magnesium alloy Corrosion resistance Hybrid coating Endothelialization Biocompatibility

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Unveiling size-fluorescence correlation of organic nanoparticles and its use in nanoparticle size determination

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Aggregate 2024年第1期5卷 331-336页

作者： Wu-Jie Guo Shixiang Ma Hui Wang Lu Qiao Lei Chen Chenyu Hong Bin Liu Xiaoyan Zheng Hui-Qing Peng State Key Laboratory of Chemical Resource Engineering Beijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijingChina Key Laboratory of Cluster Science of Ministry of Education Beijing Key Laboratory of Photoelectronic/Electro-photonic Conversion MaterialsKey Laboratory of Medicinal Molecule Science and Pharmaceutics Engineering of Ministry of Industry and Information TechnologySchool of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijingChina

Quantitatively establishing the correlation between nanoparticle size and fluorescence is essential for understanding the behavior and functionality of fluorescent nanoparticles(FNPs).However,such exploration focusing on organic FNPs has not been achieved to ***,we employ the use of supramolecular polymeric FNPs prepared from tetraphenylethylene-based bis-ureidopyrimidinone monomers(bis-UPys)to relate the size to the fluorescence of organic *** an equal concentration of bis-UPys,a logarithmic relationship between them is built with a correlation coefficient higher than *** calculations indicate that variations in fluorescence intensity among FNPs of different sizes are attributed to the distinct molecular packing environments at the surface and within the interior of the *** leads to different nonradiative decay rates of the embedded and exposed bis-UPys and thereby changes the overall fluorescence quantum yield of nanoparticles due to their different specific surface *** established fluorescence intensity-size correlation possesses fine universality and reliability,and it is successfully utilized to estimate the sizes of other nanoparticles,including those in highly diluted dispersions of *** work paves a new way for the simple and real-time determination of nanoparticle sizes and offers an attractive paradigm to optimize nanoparticle functionalities by the size effect.

关键词： aggregation-induced emission fluorescence detection fluorescent nanoparticle nanoparticle size supramolecular polymer

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Design and fabrication of NiFe_(2)O_(4)/few-layers WS_(2) composite for supercapacitor electrode material

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Frontiers of materials science 2023年第3期17卷 83-94页

作者： Xicheng Gao Jianqiang Bi Lulin Xie Chen Liu Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials(Ministry of Education) School of Materials Science and EngineeringShandong UniversityJinan 250061China

Few-layers WS_(2) was obtained through unique chemical liquid exfoliation of commercial WS_(2).Results showed that after the exfoliation process,the thickness of WS_(2) reduced ***,the NiFe_(2)O_(4) nanosheets/WS_(2) composite was successfully synthesized through a facile hydrothermal method at 180°C,and then proven by the analyses of field emission scanning electron microscopy,X-ray diffraction,and X-ray photoelectron *** composite showed a high specific surface area of 86.89 m^(2)·g^(−1) with an average pore size of 3.13 ***,in the threeelectrode electrochemical test,this composite exhibited a high specific capacitance of 878.04 F·g^(−1) at a current density of 1 A·g^(−1),while in the two-electrode system,the energy density of the composite could reach 25.47 Wh·kg^(−1) at the power density of 70 W·kg^(−1) and maintained 13.42 Wh·kg^(−1) at the higher power density of 7000 W·kg^(−1).All the excellent electrochemical performances demonstrate that the NiFe_(2)O_(4) nanosheets/WS_(2) composite is an excellent candidate for supercapacitor applications.

关键词： WS_(2) chemical liquid exfoliation NiFe_(2)O_(4) composite supercapacitor

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Effect of water loss during curing on hydration reaction and hydrates conversion in calcium aluminate cement-bonded castables

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Journal of Iron and Steel Research International 2024年第9期31卷 2133-2141页

作者： Zhong-zhuang Zhang Xiao-yu Wang Song-zhu Chu Jin-yan Zeng Yuan-dong Mu You-qi Li Zhong-tao Luo Guo-tian Ye Henan Key Laboratory of High Temperature Functional Ceramics School of Materials Science and EngineeringZhengzhou UniversityZhengzhou450001HenanChina School of Materials Science and Engineering Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou450000HenanChina Jiangsu Jingxin New Materials Co. Ltd.Yangzhou225000JiangsuChina

Free water available in calcium aluminate cement(CAC)-bonded castables is crucial for the hydration of CAC and the conversion of hydration products in the curing and drying processes,as both the hydration and conversion reactions are dissolution–precipitation *** elucidate the effect of different levels of free water loss upon the hydration of CAC,the conversion of hydration products and the mechanical strength of the CAC-bonded castables,the CAC-bonded castables were subjected to sealed and unsealed curing conditions at 50℃ and drying at 110℃.The results demonstrate that the fast removal of free water during unsealed curing would hinder the conversion from 2CaO·Al_(2)O_(3)·8H_(2)O to 3CaO·Al_(2)O_(3)·6H_(2)O and consequently prevent the deterioration of *** a comparison,although sealed-cured samples have less water loss and high degree of hydration of CAC,they still show lower strength than the unsealed samples after *** following drying process further accelerates the hydration of residual calcium aluminate clinkers for both the sealed and unsealed samples,but still does not favor the conversion from 2CaO·Al_(2)O_(3)·8H_(2)O to 3CaO·Al_(2)O_(3)·6H_(2)O in the unsealed-cured samples.

关键词： Water loss Hydration Conversion Mechanical strength Calcium aluminate cement

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Multiple impacts of trace Tb addition on the secondary recrystallization andmagnetostriction of Fe–Ga thin sheet

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International Journal of Minerals,Metallurgy and materials 2025年第4期32卷 902-914页

作者： Jiande Liu Zhenghua He Yuhui Sha Xiaofei Zhu Hongbo Hao Lijia Chen Liang Zuo School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Shenyang Key Laboratory of Advanced Structural Materials and Applications Shenyang University of TechnologyShenyang 110870China Key Laboratory for Anisotropy and Texture of Materials(Ministry of Education) Northeastern UniversityShenyang 110819China Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China

Fe–Ga sheets with large magnetostriction are required for improving the conversion efficiency under the ultra-high frequencymagnetic field. Trace Tb element doping can simultaneously improve the magnetostriction and ductility of Fe–Ga alloy. However, the im-pact of trace Tb doping on the microstructure and magnetostriction of Fe–Ga thin sheets is an open question. In this paper, the effects oftrace Tb addition on the secondary recrystallization and magnetostriction of Fe–Ga thin sheets are systematically studied by comparing thecharacteristics evolution of precipitation, texture, and nanoinclusions. The results indicate that trace Tb addition accelerates the secondaryrecrystallization of Goss texture due to the combined action of the bimodal size distributed precipitates, smaller grains, and more HEGBsin primary recrystallization. After quenching at 900℃, the magnetostriction value in 0.07 at %Tb-doped Fe_(81)Ga_(19) thin sheets increases by 30% to that of Fe_(81)Ga_(19) thin sheets. The increase in magnetostriction is attributed to the decrease in the number of Tb-rich precipitates andthe higher density of the nanometer-sized modified-D0_(3) inclusions induced by the dissolving of trace Tb elements after quenching. Theseresults demonstrate a simple and efficient approach for preparing Fe–Ga thin sheets with a large magnetostrictive coefficient by a combin-ation of trace RE element addition and conventional rolling method.

关键词： magnetostriction alloy thin sheets RE dopant secondary recrystallization precipitate phase nanoheterogeneity.

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