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Frontiers of Materials Science 2012年第2期6卷 149-159页

作者： Jing SUN Ling-hao HE Qiao-Ling Zhao Li-Fang CAI Rui SONG yong-mei hao Zhi MA WeiHUANG Key Lab of Surface and Interface Sciences of Henan Provincial Zhengzhou University of Light IndustryZhengzhou 450002China Shanghai Institute of Organic Chemistry Chinese Academy of SciencesShanghai 200032china College of Chemistry and Chemical Engineering Gracluate University of Chinese Academy of SciencesBeijing 100049China Laboratory of Advanced Polymer Materials Institute of Chemistry Chinese Academy of SciencesBeijing 100080China

An effective method was used to Ioidal suspensions of highly reduced graphene produce stable and homogeneous coloxide （RGO） in N,N-dimethylformamide （DMF） without the assistance of dispersing agents. According to the results of general characterization, relatively pure graphene sheets with the morphology of single layer or few-layer structure were obtained. Then nanocomposite powders of RGO and poly （vinylidene fluoride）（PVDF） were prepared by vacuum filtration of the mixed dispersions of both components. The nanocomposites exhibit a high-frequency capacitative response with small equivalent series resistance （ESR） at 0.4Q, a nearly rectangular cyclic voltammogram and possess a rapid current response as electrodes for supercapacitor in 5mol/L KOH electrolyte. Furthermore, after 600 galvanostatic charge/ discharge cycles, the supercapacitor still performs a very high stability and efficiency of capacitance.

关键词： reduced graphene oxide (RGO) poly(vinylidene fluoride) (PVDF) nano.,composite supercapacitor

Modification on crystallization of poly（vinylidene fluoride）（PVDF） by solvent extraction of poly（methyl methacrylate）（PMMA） in PVDF/PMMA blends

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Frontiers of Materials Science 2011年第4期5卷 388-400页

作者： Jing SUN Lu YAO Qiao-Ling Zhao Jin HUANG Rui SONG Zhi MA Ling-hao HE Wei HUANG yong-mei hao Key Laboratory of Surface and Interface Sciences of Henan Province Zhengzhou University of Light Industry Zhengzhou 450005 China Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China College of Chemistry and Chemical Engineering Graduate University of Chinese Academy of Sciences Beijing 100049 China Laboratory of Advanced Polymer Materials Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

The crystallization modification of poly（vinylidene fluoride）（PVDF） was investigated for the blend films of PVDF and poiy（methyl methacrylate）（PMMA）. The mass crystallinity （Xc） and further, the β-phase content （F（β）） of PVDF, were studied for the asprepared blend films with different mass ratios. In addition, the variations of Xc and F（β） were systematically probed once the PMMA component was removed from the related blend systems. DSC, FTIR and XRD measurements all indicated that 1）Xc, F（β） and even the content of a-phase （F（a）） decreased with the addition of PMMA; 2） with the extraction of PMMA, both Xc and F（β） increased while F（a） decreased. It is worth noting that the increase of Xc and F（β） depended on the relative amount of extracted PMMA （EpMMA）, i.e., the more PMMA was removed, the more Xc and F（β） increased. These results reveal the hindrance effect from the PMMA constituent to the crystallization of PVDF, and consequently, this restriction would be released when the PMMA was extracted.

关键词： poly(vinylidene fluoride) poly(methyl methacrylate) blend film crystallization

NiNC Catalysts in CO_(2)-to-CO Electrolysis

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Nano-Micro Letters 2025年第4期17卷 363-366页

作者： hao Zhang Menghui Qi yong Wang Department of Chemical Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Department of Chemistry University of OxfordOxford OX13TAUK Advanced Materials and Catalysis Group Department of ChemistryInstitute of CatalysisZhejiang UniversityHangzhou 310058People’s Republic of China

CO_(2)-to-CO electrolyzer technology converts carbon dioxide into carbon monoxide using electrochemical methods,offering significant environmental and energy benefits by aiding in greenhouse gas mitigation and promoting a carbon circular *** study by Strasser et *** Nature Chemical Engineering presents a high-performance CO_(2)-to-CO electrolyzer utilizing a NiNC catalyst with nearly 100%faradaic efficiency,employing innovative diagnostic tools like the carbon crossover coefficient(CCC)to address transport-related failures and optimize overall ***’s research demonstrates the potential of NiNC catalysts,particularly NiNC-IMI,for efficient CO production in CO_(2)-to-CO electrolyzers,highlighting their high selectivity and ***,challenges such as localized CO_(2)depletion and mass transport limitations underscore the need for further optimization and development of diagnostic tools like *** for optimizing catalyst structure and operational parameters offer avenues for enhancing the performance and reliability of electrochemical CO_(2)reduction catalysts.

关键词： NiNC catalysts CO_(2)-to-CO electrolyzer Faradaic efficiency Carbon crossover coefficient(CCC) Mesoporous structures

Flotation separation of chalcopyrite from pyrite using mineral fulvic acid as selective depressant under weakly alkaline conditions

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 313-325页

作者： Zhi-hao SHEN Shu-ming WEN Jia-mei hao Qi-cheng FENG State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization Faculty of Land Resource EngineeringKunming University of Science and TechnologyKunming 650093China

Mineral fulvic acid(MFA)was used as an eco-friendly pyrite depressant to recover chalcopyrite by flotation with the use of the butyl xanthate as a *** experiments showed that MFA produced a stronger inhibition effect on pyrite than on *** separation of chalcopyrite from pyrite was realized by introducing 150 mg/L MFA at a pulp pH of approximately *** copper grade,copper recovery,and separation efficiency were 28.03%,84.79%,and 71.66%,*** adsorption tests,zeta potential determinations,and localized electrochemical impedance spectroscopy tests showed that more MFA adsorbed on pyrite than on chalcopyrite,which weakened the subsequent interactions between pyrite and the *** force microscope imaging further confirmed the adsorption of MFA on pyrite,and X-ray photoelectron spectroscopy results indicated that hydrophilic Fe-based species on the pyrite surfaces increased after exposure of pyrite to MFA,thereby decreasing the floatability of pyrite.

关键词： mineral fulvic acid chalcopyrite pyrite flotation separation

Preparation of Low Ratio Magnesium Ccement by Acid Leaching Treatment of Boron Mud

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Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 120-129页

作者： YANG mei ZHANG Mingzhe CHEN hao School of Materials Science and Engineering Shenyang Jianzhu UniversityShenyang 110168China School of Physical Science and Technology Shenyang Normal UniversityShenyang 110168China

The effects of liquid-solid ratio and reaction time on the leaching rate of magnesium at room temperature were investigated,as well as the effects of the molar ratio of MgO/MgCl_(2),the amount of water added,and the amount of acid-impregnated slag dosed on the compressive strength and water resistance of *** results showed that the magnesium element in the boron mud could be maximally leached under the conditions of 1:1 concentration of hydrochloric acid at room temperature,liquid-solid ratio of 2.5 mL·g^(-1),and reaction time of 5 h,and the main products were amorphous SiO_(2) as well as a small amount of magnesium olivine which had not been completely *** LR-MOC prepared using the acid-soaked mixture could reach a softening coefficient of 0.85 for 28 d of water immersion when the molar ratio of MgO/MgCl_(2) was 2.2,the amount of water added was 0 g,and the acid-soaked slag dosing was 40 wt%,which also led to an appreciable late-strength,with an increase of 19.4%in compressive strength at 28 d compared to that at 7 *** previous studies,LR-MOC prepared in this way has a final strength phase that is not the more easily hydrolysed 3-phase but the lath-like *** this phenomenon,we analyzed the mechanism and found that,during the acid leaching process,a part of amorphous SiO_(2) dissolved in the acid leaching solution formed a silica sol,in which Mg^(2+)played a bridging role to make the silica sol more *** the addition and hydrolysis of MgO,the silica sol gel coagulation slows down,providing a capping layer to inhibit the hydrolysis of the 5-phase crystals and providing some strength after *** amorphous SiO_(2) in the other part of the acid-impregnated slag generated M-S-H gel with Mg^(2+)and OH-,which synergised with the dense structure composed of interlocking crystals to improve the water resistance of LR-MOC.

关键词： boron mud magnesium chloride-oxygen cement acid immersion water resistance silica sol

Deciphering theαrelaxation and the anelastic-to-plastic transition in the deep glassy state

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Science China(Physics,Mechanics & Astronomy) 2025年第3期68卷 131-138页

作者： Qi hao Guanghui Xing Eloi Pineda Claudio Fusco Laurent Chazeau Jean-Marc Pelletier Yunjiang Wang yong Yang Jichao Qiao School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi’an710072China Department of Physics Institute of Energy TechnologiesUniversitat Politècnica de CatalunyaBarcelona08019Spain Univ Lyon INSA LyonUniversitéClaude Bernard Lyon 1CNRSMATEISUMR5510Villeurbanne69621France State Key Laboratory of Nonlinear Mechanics Institute of MechanicsChinese Academy of SciencesBeijing100190China School of Engineering Science University of Chinese Academy of SciencesBeijing100049China Department of Mechanical Engineering College of EngineeringCity University of Hong KongHong Kong999077China Department of Materials Science and Engineering College of EngineeringCity University of Hong KongHong Kong999077China State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment Northwestern Polytechnical UniversityXi’an710072China Key Laboratory of Aircraft Structural Integrity Ministry of Industry and Information TechnologyXi’an710072China

In contrast to their conventional crystalline counterparts,amorphous solids exhibit diverse dynamic relaxation mechanisms under external *** challenge to understanding their behavior lies in unifying microscopic dynamics,relaxation,and macroscopic *** study establishes a potential link by quantifying the characteristic time of the anelastic-to-plastic transition through dynamic mechanical relaxation and stress relaxation tests across a wide temperature range in both the supercooled liquid and the glassy *** is found that the stress relaxation time in the glassy solids follows an Arrhenius relationship,aligning with the mainαrelaxation time,and unveils a finding:αrelaxation continues to govern deformation even below the glass transition,challenging previous assumptions of the role of secondaryβrelaxation.A hierarchically constrained atomic dynamics model rationalizes the temperature dependence ofαrelaxation and the transition fromβtoαrelaxation,also providing evidence that the stretched exponent in the Kohlrausch-Williams-Watts equation can serve as an order *** work highlights the role ofαrelaxation in the glassy state and contributes to elucidating the potential correlation between relaxation and deformation in amorphous materials.

关键词： dynamic relaxation nonelastic deformation metallic glasses aging

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New poly-types of LPSO structures in a non-equilibrium Mg_(97)Zn_(1)Y_(1.6)Ca_(0.4)alloy

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China Foundry 2025年第1期22卷 83-89页

作者： Qian-qian Jin Zi-hui Tang Wen-long Xiao Xiu-yu Qu Xu-hao Han Lin mei Xiao-hong Shao Xiu-liang Ma School of Biological and Chemical Engineering Guangxi University of Science and TechnologyLiuzhou 545006GuangxiChina Center for the Structure of Advanced Matter School of Electronic EngineeringGuangxi University of Science and TechnologyLiuzhou 545006GuangxiChina Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Bay Area Center for Electron Microscopy Songshan Lake Materials LaboratoryDongguan 523808GuangdongChina

In this study,a comprehensive analysis of microstructural features,morphology,crystal structures,and interface structures of long-period stacking ordered(LPSO)structures in a non-equilibrium Mg_(97)Zn_(1)Y_(16)Ca_(0.4)alloy cast in a steel mold was carried *** addition of Ca element plays an important role in the refinement of LPSO *** result reveals new poly-types including 20H F2F2F4,60R(F2F3F3)_(3),and 66H F2F3F3F2(F6)_(4)featuring a 6-Mg structure,alongside the prevalent 18R and 14H LPSO *** incoherent interface between 20H and the Mg matrix is split into two dislocation arrays,leading to the formation of a segment of 60R_(1).Moreover,the superstructure 116L,designated as(F2)_(18)F4,is formed through the ordered distribution of F4 stacking faults in 18R.

关键词： LPSO structures crystal structure Mg alloys heterogeneous interface

Positive effect of Mo on mechanical properties of a Ni-42W-10Co-xMo medium heavy alloy

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China Foundry 2025年第1期22卷 108-116页

作者： Guo-xin Cao Jian-xin Dong yong-sheng He He Jiang Fang hao Zhi-hua Nie Teng-fei Ma Bao-quan Fu School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China Xi'an Superalloy Technology Co. Ltd.Xi’an 710299China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China Key Laboratory of Air-driven Equipment Technology of Zhejiang Province Quzhou UniversityQuzhou 324000ZhejiangChina

In this study,a novel Ni-W-Co-Mo medium heavy alloy(MHA)was designed to improve its mechanical strength via Mo *** the Ni-42W-10Co-x Mo alloy series,where x represents the weight percent of Mo and varies between 0,1,2,5,and 10,the microstructure transitions from a dendritic structure to a hypo-eutectic structure as the Mo content increases from 0 to 5wt.%.Moreover,as the Mo content increases from 0 to 10wt.%,the distribution of theμ-phase shifts from being individually dispersed to forming aggregates,and its volume fraction rises from 0.5%to 7.9%.Notably,theμ-phase evolves into an eutectic microstructure,which helps in minimizing the segregation of *** change is accompanied by a substantial enhancement in mechanical properties;specifically,the compressive yield strength at room temperature increases from 350 MPa to 646 MPa,indicating a significant 85%***,the microhardness increases from 230 HV to 304 *** dynamics simulations further reveal that the strengthening mechanism of Ni-42W-10Co-x Mo alloys is Mo-induced solid solution strengthening and precipitation strengthening.

关键词： medium-heavy alloys Ni-based alloy mechanical properties solid solution strengthening precipitation strengthening

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Low-concentration atropine(0.01%)on quantitative contrast sensitivity function in Chinese children with myopia

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International Journal of Ophthalmology(English edition) 2025年第1期18卷 117-124页

作者： Yu-hao Ye Yi-yong Xian Fang Liu Zhong-Lin Lyu Xing-Tao Zhou Jing Zhao Department of Ophthalmology and Optometry Eye&ENT Hospital of Fudan UniversityShanghai 200031China NHC Key Laboratory of Myopia(Fudan University) Key Laboratory of MyopiaChinese Academy of Medical SciencesShanghai 200000China Shanghai Research Center of Ophthalmology and Optometry Shanghai 200000China Shanghai Engineering Research Center of Laser and Autostereoscopic 3D for Vision Care(20DZ2255000).Shanghai 200030 China Division of Arts and Sciences NYU ShanghaiShanghai 200000China Center for Neural Science and Department of Psychology New York UniversityNew York 10012USA NYU-ECNU Institute of Brain and Cognitive Science NYU ShanghaiShanghai 200000China

AIM:To investigate the effect of 0.01%low-concentration atropine(LA)on quantitative contrast sensitivity function(qCSF)in children with ***:This paired case-control study included 90 eyes of 58 children who were sex-,age-,and refractionmatched and equally divided into two groups:the 0.01%LA group had undergone 6mo use of daily 0.01%atropine and control group was naïve to *** ophthalmic examinations and qCSF test without refractive correction were *** groups were compared in monocular and binocular qCSF parameters,including the area under logCSF,CSF acuity,and contrast sensitivity(CS)at 1.0-18.0 cycle per degree(cpd).RESULTS:In the monocular comparison,the CSF acuity of the LA group was significantly higher than that of the control group(7.58±5.51 vs 6.37±4.22 cpd,P<0.05).The subgroup analysis showed that in the 6-9y group,CSF acuity was significantly higher in the LA group than the control group(8.76±6.19 vs 6.54±4.25 cpd,P<0.05),and in the Female group,low refraction sphere group,and high refraction cylinder group,the CS at high spatial frequencies(12.0 and 18.0 cpd)were significantly higher in the LA group than in the control group(all P<0.05).In the binocular test,CSF acuity and CS at 12.0 cpd were significantly higher in the LA group than in the control group(10.95±7.00 vs 8.65±5.12 cpd;0.17±0.33 vs 0.06±0.16,respectively;both P<0.05).CONCLUSION:Use of LA may result in improved CS in children with early onset myopia.

关键词： low-concentration atropine myopia quantitative contrast sensitivity function Chinese children

OsbZIP27 coordinates with OsHUB1 and OsHUB2 to modulate drought tolerance in rice

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Journal of Genetics and Genomics 2025年第2期52卷 168-178页

作者： Zuntao Xu Yachun Yang Fei Zhang hao Li Hui Ma Wenge Wu yong Ding Anhui Province Key Laboratory of Rice Genetics and Breeding Rice Research InstituteAnhui Academy of Agricultural SciencesHefeiAnhui 230031China Biological Breeding Laboratory of Anhui Province HefeiAnhui 230031China Ministry of Education Key Laboratory for Membraneless Organelles and Cellular Dynamics HefeiAnhui 230027China School of Life Sciences University of Science and Technology of ChinaHefeiAnhui 230027China The Grain Industry Research Institute of Anhui Agricultural University HefeiAnhui 230036China

Histone H2B ubiquitination(H2Bub)is positively linked to transcriptional activation,but the genetic programs affected by H2Bub to enhance drought tolerance remain largely ***,we show that OsbZIP27 interacts directly with OsHUB1/2 to regulate drought tolerance in rice by binding to the promoters of OsHAK1 and OsGLN1 to achieve H2Bub and transcriptional ***,mutations in OsbZIP27 reduce transcription of OsHAK1 and OsGLN1,resulting in increased sensitivity to drought ***,loss of OsHUB1 and OsHUB2 function causes hypersensitivity to drought stress,whereas OsHUB2 overexpression enhances drought ***,our results indicate that OsbZIP27 coordinates with OsHUB1/2 to enhance rice drought tolerance by increasing H2Bub and expression of OsHAK1 and OsGLN1.

关键词： H2B monoubiquitination Drought stress bZIP transcription factor Ring domain protein Potassium transporter Glucanase