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Chalcogen-dependent catalytic properties of RuX2 (X = s/se/Te) nanoparticles decorated carbon nanofibers for hydrogen evolution in acidic and alkaline media

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Nano Research 2024年第4期17卷 2528-2537页

作者： Chengkai he Yue Wei Jia Xu Yujie Wei Tao Wang Rongfei Liu Lvlv Ji Zhun Liu sheng Wang s.hool of materials science and Engineering Zhejiang Sci-Tech UniversityHangzhou 310018China Department of Physics Shaoxing UniversityShaoxing 312000China Zhejiang Kangjiesi New material Technology Co. LTDZhuji 311800China

Transition metal dichalcogenides(TmDs),with the general formula mX_(2)(m=mo/W/Fe/Co/Ni,etc.;X=s/se/Te),have attracted extensive research interests for hydrogen evolution reaction(hER).Compared with numerous studies on noble-metal-free TmDs,the chalcogen-dependent hER catalytic properties of noble-metal-based TmDs are lack of sufficient research ***,a facile electrospinning-assisted synthetic strategy is proposed to synthesize ruthenium dichalcogenides(RuX_(2),X=s/se/Te)nanoparticles decorated carbon nanofibers(CNFs).Benefiting from the identical nanofibrous morphology and exposed crystal planes of RuX_(2)(111),the catalytic activities of RuX_(2)@CNFs samples were investigated and compared in a fair and direct *** electrochemical measurements coupled with density functional theory calculations were carried out to probe their intrinsic hER catalytic activities,resulting in the catalytic activity order of Rus_(2)@CNFs>Ruse_(2)@CNFs>RuTe_(2)@CNFs in acidic media and that of Rus_(2)@CNFs>RuTe_(2)@CNFs>Ruse_(2)@CNFs in alkaline *** superior catalytic performance of Rus_(2)@CNFs mainly stems from the relative lower hER energy barriers and thereby the higher intrinsic catalytic activity of Rus_(2)(111),leading to ultralow overpotentials of 44 and 9 mV at 10 mA·cm^(-2) in acidic and alkaline media,***_(2)(111)is endowed with the more optimized gibbs free energy of hydrogen adsorption(Δgh*)than RuTe_(2)(111),but RuTe_(2)(111)shows enhanced catalytic property for h_(2)O dissociation and Oh-desorption than Ruse_(2)(111),therefore,resulting in the altered catalytic activity sequences for Ruse_(2) and RuTe_(2) in acidic and alkaline media.

关键词： hydrogen evolution reaction transition metal dichalcogenides carbon nanofibers electrocatalysis catalytic activity

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Feasibility study on Recovering human-Occupied Vehicle with An Offshore Crane

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China Ocean Engineering 2024年第4期38卷 648-662页

作者： hAN ming-yue XIE Peng XIAN hao-yi ZhONg Xin-xin ChEN sheng-lin sUN Tie-rui sUN Feng-lei s.hool of Ocean Engineering and Technology Sun Yat-Sen UniversityZhuhai 519082China Key Laboratory of Comprehensive Observation of Polar Environment(sun Yat-sen University) Ministry of EducationZhuhai 519082China guangzhou marine Engineering Corporation Guangzhou 510250China

Launching and recovering human-occupied vehicles.hOVs.has always been a challenging *** current recovery process requires staff to manually complete the tethering task,which is inefficient and endangers the lives of *** paper suggests moving the recovery position from the surface to underwater at approximately half the wavelength of the water depth(30−50 m underwater),where the hOV experiences less environmental *** ROV equipped with a ultra-short baseline beacon(UsBL)and a manipulator was used to complete the tethering ***,a shackle customized to the shape of the manipulator’s gripper is fitted to the end of the cable to simplify the tethering *** investigate the dynamic response of recovering the hOV using this suggested method,a comprehensive numerical model is developed in this *** effects of wind,surface waves,ocean currents,and nonlinear interaction between the installation vessel and the hOV are quantitatively *** results show that the proposed recovery method can reduce the motion amplitude of the hOV and that the wave has the greatest influence on the dynamic response of the hOV during the recovery *** model provides better insight into the proposed hOV recovery method and confirms the effectiveness of the heave compensation *** proposed approach aims to enhance safety and operational efficiency by reducing direct human involvement in the recovery process and mitigating potential *** finding holds particular significance,especially in environmentally sensitive areas,where reducing the impact on the surrounding ecosystem is crucial.

关键词： human-occupied vehicle recovery dynamic response active heave compensation

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Regulating the key performance parameters for hg-based IR NLO chalcogenides via bandgap engineering strategy

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Chinese Chemical Letters 2024年第10期35卷 516-520页

作者： A-Yang Wang sheng-hua Zhou mao-Yin Ran Xin-Tao Wu hua Lin Qi-Long Zhu state Key Laboratory of structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences (CAS) Fujian science & Technology Innovation Laboratory for Optoelectronic Information of China College of Chemistry Fuzhou University University of Chinese Academy of sciences

Recently, non-centrosymmetric（NCs） hg-based chalcogenides.have garnered significant interest due to their strong second-harmonic-generation intensities(deff), making them attractive candidates for infrared nonlinear optical（IR-NLO） application. however, achieving both wide band gaps（Eg） and large phasematched deffsimultaneously in these materials remains a challenge due to their inherent constraints on each other. In this research, we have successfully obtained two quaternary NCs.hg-based chalcogenides, Rb2hgge3s8and Cs.hgge3s8, by implementing a bandgap engineering strategy that involves alkali metal introduction and hg/ge ratio regulation. Both compounds consist of 2D [hg ge3s8]2–anionic layers made of 1D [hgges6]6–chains and dimeric [ge2s6]4–polyhedra arranged alternately, and the charge-balanced Rb+/Cs+cations located between these layers. Remarkably, Rb2hgge3s8and Cs.hgge3s8exhibit overall properties required for promising IR-NLO materials, including sufficient Pm deff（0.55–0.70 × Aggas2@2050 nm）, large Eg（3.27–3.41 e V）, giant laser-induced damage thresholds（17.4–19.7 ×Aggas2@1064 nm）, broad optical transmission intervals（0.32–17.5 μm）, and suitable theoretical birefringence（0.069–0.086@2050 nm）. Furthermore, in-depth theoretical analysis reveals that the exceptional IRNLO performance is attributed to the synergy effects of distorted [hgs4] and [ges4] tetrahedra. Our study provides a useful strategy for enhancing the Egand advancing hg-based IR-NLO materials, which is expected to extended and implemented in other chalcogenide systems.

关键词： Bandgap engineering strategy hg-based chalcogenides IR nonlinear material structure-activity relationship Wide energy gap

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Effect of La on the Corrosion Behavior and mechanism of 3Ni Weathering steel in a simulated marine Atmos.heric Environment

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Acta metallurgica sinica(English Letters) 2024年第2期37卷 308-324页

作者： gang Niu Rui Yuan R.D.K.misra Na gong Zhi-hui Zhang hao-Xiu Chen hui-Bin Wu Cheng-Jia shang Xin-Ping.mao Collaborative Innovation Center of steel Technology University of Science and Technology BeijingBeijing100083China Laboratory for Excellence in Advanced steel Research Department of MetallurgicalMaterials and Biomedical EngineeringUniversity of Texas at El PasoEl PasoTX79968USA Institute of materials Research and Engineering Agency for ScienceTechnologyand ResearchSingapore138634Singapore Department of materials science and Engineering University of TorontoTorontoONM5S 3E4Canada

The corrosion behavior and mechanism of 3Ni weathering steel in a simulated oceanic atmos.heric environment are investigated in order to comprehend the impacts of La,as determined through electrochemical analysis and rust layer *** results of this study demonstrate that the addition of La enhances the corrosion resistance of 3Ni weathering steel in the marine atmos.heric environment,thereby reducing the corrosion rate and improving the protection of the rust *** influence of La on corrosion resistance can be attributed to two primary ***,La functions as a grain refiner,minimizing the potential difference of the micro-regions on the substrate surface,thereby significantly reducing the corrosion of bare steel in the marine ***,La inhibits the process of Fe_(3)O_(4) oxidation back toγ-FeOOh during corrosion at the local site,thus decreasing the formation ofγ-FeOOh and enhancing the charge transfer *** research work may serve as a reference for expanding the application of rare earth elements in the field of weathering steel.

关键词： Weathering steel Rare earth Rust layer Corrosion behavior Corrosion resistance

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Amplitude analysis of the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)

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Chinese Physics C 2024年第8期48卷 6-33页

作者： m.Ablikim m.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban h.-R.Bao V.Batozskaya K.Begzsuren N.Berger m.Berlowski m.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Bruegg.mann h.Cai X.Cai A.Calcaterra g.F.Cao N.Cao s.A.Cetin J.F.Chang W.L.Chang g.R.Che g.Chelkov C.Chen C.h.Chen Chao Chen g.Chen h.s.Chen m.L.Chen s.J.Chen s.L.Chen s.m.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen s.K.Choi X.Chu g.Cibinetto F.Cossio J.J.Cui h.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko m.Destefanis F.De mori B.Fang s.s.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer g.Felici C.Q.Feng J.h.Feng Y.T.Feng K.Fis.her m.Frits.h C.D.Fu J.L.Fu Y.W.Fu h.gao Y.N.gao Yang gao s.garbolino I.garzia P.T.ge Z.W.ge C.geng E.m.gersabeck B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong.m.Y.Dong X.Dong.m.C.Du s.X.Du Z.h.Duan P.Egorov Y.h.Fan J.Fang JA.gilman K.goetzen L.gong W.X.gong W.gradl s.gramigna m.greco m.h.gu Y.T.gu C.Y.guan Z.L.guan A.Q.guo L.B.guo m.J.guo R.P.guo Y.P.guo A.guskov J.gutierrez K.L.han T.T.han X.Q.hao F.A.harris K.K.he K.L.he F.h.heinsius C.h.heinz Y.K.heng C.herold T.holtmann P.C.hong g.Y.hou X.T.hou Y.R.hou Z.L.hou B.Y.hu h.m.hu J.F.hu T.hu Y.hu g.s.huang K.X.huang L.Q.huang X.T.huang Y.P.huang T.hussain F.h\"olzken N.h\"usken N.in der Wies.he m.Irshad J.Jackson s.Janchiv J.h.Jeong Q.Ji Q.P.Ji W.Ji X.B.Ji X.L.Ji Y.Y.Ji X.Q.Jia Z.K.Jia D.Jiang h.B.Jiang P.C.Jiang s.s.Jiang T.J.Jiang X.s.Jiang Y.Jiang J.B.Jiao J.K.Jiao Z.Jiao s.Jin Y.Jin m.Q.Jing X.m.Jing T.Johansson s.Kabana N.Kalantar-Nayestanaki X.L.Kang X.s.Kang.m.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf m.Kuessner X.Kui A.Kupsc W.K\"uhn J.J.Lane P.Larin L.Lavezzi T.T.Lei Z.h.Lei h.Leithoff m.Lellmann T.Lenz C.Li C.Li C.h.Li Cheng Li D.m.Li F.Li g.Li h.Li h.B.Li h.J.Li h.N.Li hui Li J.R.Li J.s.Li K.Li L.J.Li L.K.Li Lei Li m.h.Li P.R.Li Q.m.Li Q.X.Li R.Li s.X.Li T.Li W.D.Li W.g.Li X.Li X.h.Li X.L.Li X.Y.Li Y Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780 BochumGermany Budker Institute of Nuclear Physics sB RAs(BINP) Novosibirsk 630090Russia Carnegie mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central south University Changsha 410083China China Center of Advanced science and Technology Beijing 100190China China University of geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COmsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200433China gsI helmholtzcentre for heavy Ion Research gmbh D-64291 DarmstadtGermany guangxi Normal University Guilin 541004China guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China hebei University Baoding 071002China helmholtz Institute mainz Staudinger Weg 18D-55099 MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China henan University of science and Technology Luoyang 471003China henan University of Technology Zhengzhou 450001China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of Technology madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly INFN Laboratori Nazionali di Frascati INFN Sezione di PerugiaI-06100PerugiaItaly INFN Laboratori Nazionali di Frascati University of PerugiaI-06100PerugiaItaly INFN sezione di Ferrara INFN Sezione di FerraraI-44122FerraraItaly INFN sezione di Ferrara University of FerraraI-44122FerraraItaly Inner mongolia University Hohhot 010021China Institute of modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de A

Using e^(+)e^(−)annihilation data corresponding to an integrated luminosity of 2.93 fb^(−1)taken at the center-of-mass energy√s=3.773 geV with the BEsIII detector,a joint amplitude analysis is performed on the decays D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η).The fit fractions of individual components are obtained,and large interferences among the dominant components of the decays D^(0)→a_(1)(1260)π,D^(0)→π(1300)π,D^(0)→ρ(770)ρ(770),and D^(0)→2(ππ)_(s)are observed in both *** the obtained amplitude model,the CP-even fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are determined to be(75.2±1.1_(stat).±1.5_(syst.))%and(68.9±1.5_(stat).±2.4_(syst.))%,*** branching fractions of D^(0)→π^(+)π^(−)π^(+)π^(−)and D^(0)→π^(+)π^(−)π^(0)π^(0)(non-η)are measured to be(0.688±0.010_(stat.)±0.010_(syst.))%and(0.951±0.025_(stat.)±0.021_(syst.))%,*** amplitude analysis provides an important model for the binning strategy in measuring the strong phase parameters of D^(0)→4πwhen used to determine the CKm angleγ(ϕ_(3))via the B^(−)→DK^(−)decay.

关键词： BEsIII D^(0)meson decays amplitude analysis CP-even fraction

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Boric Acid-Assisted Pyrolysis for high-Loading single-Atom Catalysts to Boost Oxygen Reduction Reaction in Zn-Air Batteries

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Energy & Environmental materials 2024年第2期7卷 102-110页

作者： Chenxi Xu Jiexing Wu Liang Chen Yi gong Boyang.mao Jincan Zhang Jinhai Deng.mingxuan mao Yan shi Zhaohui hou mengxue Cao huanxin Li haihui Zhou Zhongyuan huang Yafei Kuang state Key Laboratory for Chemo/Biosensing and Chemometrics and College of Chemistry and Chemical Engineering Hunan UniversityChangsha 410082China s.hool of Chemistry and Chemical Engineering Key Laboratory of Hunan Province for Advanced Carbon-based Functional MaterialsHunan Institute of Science and TechnologyYueyang 414006China Advanced Technology Institute University of SurreyGuildford Surrey GU27XHUK Department of Engineering University of Cambridge9 JJ Thomson AvenueCambridge CB30FAUK King's College London London SE11ULUK Department of Electrical and Electronic Engineering Imperial College LondonLondon SW72AZUK College of materials and metallurgy Guizhou UniversityGuiyang 550025China Department of Chemistry Physical&Theoretical Chemistry LaboratoryUniversity of OxfordSouth Parks RoadOxford OX13QZUK

The emerging of single-atom catalysts(sACs)offers a great opportunity for the development of advanced energy storage and conversion devices due to their excellent activity and durability,but the actual mass production of high-loading sACs is still ***,a facile and green boron acid(h_(3)BO_(3))-assisted pyrolysis strategy is put forward to synthesize sACs by only using chitosan,cobalt salt and h_(3)BO_(3)as precursor,and the effect of h_(3)BO_(3)is deeply *** results show that molten boron oxide derived from h_(3)BO_(3)as ideal high-temperature carbonization media and blocking.media play important role in the synthesis *** a result,the acquired Co/N/B tri-doped porous carbon framework(Co-N-B-C)not only presents.hierarchical porous structure,large specific surface area and abundant carbon edges but also possesses.high-loading single Co atom(4.2 wt.%),thus giving rise to outstanding oxygen catalytic *** employed as a catalyst for air cathode in Zn-air batteries,the resultant Co-N-B-C catalyst shows remarkable power density and long-term ***,our work gains deep insight into the role of h_(3)BO_(3)and provides a new avenue to synthesis of high-performance sACs.

关键词： boric acid oxygen reduction reaction single-atom catalysts Zn-air batteries

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Determination of the number ofψ(3686)events taken at BEsⅢ

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Chinese Physics C 2024年第9期48卷 8-20页

作者： m.Ablikim m.N.Achasov P.Adlarson O.Afedulidis X.C.Ai R.Aliberti A.Amoroso Q.An Y.Bai O.Bakina I.Balossino Y.Ban h.-R.Bao V.Batozskaya K.Begzsuren N.Berger m.Berlowski m.Bertani D.Bettoni F.Bianchi E.Bianco A.Bortone I.Boyko R.A.Briere A.Bruegg.mann h.Cai X.Cai A.Calcaterra g.F.Cao N.Cao s.A.Cetin J.F.Chang g.R.Che g.Chelkov C.Chen C.h.Chen Chao Chen g.Chen h.s.Chen h.Y.Chen m.L.Chen s.J.Chen s.L.Chen s.m.Chen T.Chen X.R.Chen X.T.Chen Y.B.Chen Y.Q.Chen Z.J.Chen Z.Y.Chen s.K.Choi g.Cibinetto F.Cossio J.J.Cui h.L.Dai J.P.Dai A.Dbeyssi R.E.de Boer D.Dedovich C.Q.Deng Z.Y.Deng A.Denig I.Denysenko m.Destefanis F.De mori B.Ding X.X.Ding Y.Ding Y.Ding J.Dong L.Y.Dong.m.Y.Dong X.Dong.m.C.Du s.X.Du Y.Y.Duan Z.h.Duan P.Egorov Y.h.Fan J.Fang J.Fang s.s.Fang W.X.Fang Y.Fang Y.Q.Fang R.Farinelli L.Fava F.Feldbauer g.Felici C.Q.Feng J.h.Feng Y.T.Feng.m.Frits.h C.D.Fu J.L.Fu Y.W.Fu h.gao X.B.gao Y.N.gao Yang gao s.garbolino I.garzia L.ge P.T.ge Z.W.ge C.geng E.m.gersabeck A.gilman K.goetzen L.gong W.X.gong W.gradl s.gramigna m.greco m.h.gu Y.T.gu C.Y.guan Z.L.guan A.Q.guo L.B.guo m.J.guo R.P.guo Y.P.guo A.guskov J.gutierrez K.L.han T.T.han F.hanis.h X.Q.hao F.A.harris K.K.he K.L.he F.h.heinsius C.h.heinz Y.K.heng C.herold T.holtmann P.C.hong g.Y.hou X.T.hou Y.R.hou Z.L.hou B.Y.hu h.m.hu J.F.hu s.L.hu T.hu Y.hu g.s.huang K.X.huang L.Q.huang X.T.huang Y.P.huang T.hussain F.hölzken N.hüsken N.in der Wies.he J.Jackson s.Janchiv J.h.Jeong Q.Ji Q.P.Ji W.Ji X.B.Ji X.L.Ji Y.Y.Ji X.Q.Jia Z.K.Jia D.Jiang h.B.Jiang P.C.Jiang s.s.Jiang T.J.Jiang X.s.Jiang Y.Jiang J.B.Jiao J.K.Jiao Z.Jiao s.Jin Y.Jin m.Q.Jing X.m.Jing T.Johansson s.Kabana N.Kalantar-Nayestanaki X.L.Kang X.s.Kang.m.Kavatsyuk B.C.Ke V.Khachatryan A.Khoukaz R.Kiuchi O.B.Kolcu B.Kopf m.Kuessner X.Kui N.Kumar A.Kupsc W.Kühn J.J.Lane P.Larin L.Lavezzi T.T.Lei Z.h.Lei m.Lellmann T.Lenz C.Li C.Li C.h.Li Cheng Li D.m.Li F.Li g.Li h.B.Li h.J.Li h.N.Li hui Li J.R.Li J.s.Li Ke Li L.J.Li L.K.Li Lei Li m.h.Li P.R.Li Q.m.Li Q.X.Li R.Li s.X.Li T.Li W.D.Li W.g.Li X.Li X.h.Li X.L.Li X.Z.Li Xi Institute of high Energy Physics Beijing 100049China Beihang University Beijing 100191China Bochum Ruhr-University D-44780BochumGermany Budker Institute of Nuclear Physics sB RAs(BINP) Novosibirsk 630090Russia Carnegie mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China Central south University Changsha 410083China China Center of Advanced science and Technology Beijing 100190China China University of geosciences Wuhan 430074China Chung-Ang University Seoul06974Republic of Korea COmsATs University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000LahorePakistan Fudan University Shanghai 200433China gsI helmholtzcentre for heavy Ion Research gmbh D-64291DarmstadtGermany guangxi Normal University Guilin 541004China guangxi University Nanning 530004China hangzhou Normal University Hangzhou 310036China hebei University Baoding 071002China helmholtz Institute mainz Staudinger Weg 18D-55099MainzGermany henan Normal University Xinxiang 453007China henan University Kaifeng 475004China henan University of science and Technology Luoyang 471003China henan University of Technology Zhengzhou 450001China huangshan College Huangshan 245000China hunan Normal University Changsha 410081China hunan University Changsha 410082China Indian Institute of Technology madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati (A)INFN Laboratori Nazionali di FrascatiI-00044FrascatiItaly(B)INFN Sezione di PerugiaI-06100PerugiaItaly(C)University of PerugiaI-06100PerugiaItaly INFN sezione di Ferrara (A)INFN Sezione di FerraraI-44122FerraraItaly(B)University of FerraraI-44122FerraraItaly Inner mongolia University Hohhot 010021China Institute of modern Physics Lanzhou 730000China Institute of Physics and Technology Peace Avenue 54BUlaanbaatar 13330Mongolia Instituto de Alta Investigación Universidad de TarapacáCasilla 7DArica 1000000Chile Jilin University Changchun 130012China Joha

The number ofψ(3686)events collected by the BEsⅢdetector during the 2021 run period is determined to be(2259.3±11.1)×10~6 by counting inclusiveψ(3686)hadronic *** uncertainty is systematic and the statistical uncertainty is ***,the numbers ofψ(3686)events collected during the 2009 and 2012run periods are updated to be(107.7±0.6)×10~6 and(345.4±2.6)×10~6,*** numbers are consistent with the previous measurements within one standard *** total number ofψ(3686)events in the three data samples is(2712.4±14.3)×10~6.

关键词： ψ(3686) inclusive process hadronic events BEsⅢdetector

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3,5-二硝基苯甲酸功能化的金属有机框架CAU-10-Nh-DNBA荧光检测硫化氢

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高等学校化学学报 2024年第8期45卷 80-88页

作者：龚文朋周林楠黄冈师范学院化学化工学院黄冈438000

设计合成了一种基于3,5-二硝基苯甲酸功能化的金属有机框架CAU-10-Nh-DNBA荧光探针,可直接用于h_(2)s的检测.首先,以三氯化铝和5-氨基间苯二甲酸为原料,在溶剂热条件下合成了金属有机框架CAU-10-Nh_(2);然后,在水溶液中,以CAU-10-Nh_(2)... 详细信息

设计合成了一种基于3,5-二硝基苯甲酸功能化的金属有机框架CAU-10-Nh-DNBA荧光探针,可直接用于h_(2)s的检测.首先,以三氯化铝和5-氨基间苯二甲酸为原料,在溶剂热条件下合成了金属有机框架CAU-10-Nh_(2);然后,在水溶液中,以CAU-10-Nh_(2)和3,5-二硝基苯甲酸(DNBA)为原料,在偶联剂1-乙基-(3-二甲基氨基丙基)碳二亚胺盐酸盐(EDC)和N-羟基琥珀酰亚胺(Nhs)的共同作用下,合成了CAU-10-Nh-DNBA.采用红外光谱、X射线衍射谱、固体核磁共振波谱、X射线光电子能谱和扫描电子显微镜对其进行了表征.结果表明,CAU-10-Nh-DNBA的激发和发射波长分别为320和412 nm;h_(2)s可使CAU-10-Nh-DNBA荧光增强;并考察了ph值、时间和温度对检测效果的影响.在最佳实验条件下,CAU-10-Nh-DNBA对h_(2)s的检出限为2.43μmol/L,线性范围为3.9~62.5μmol/L,具有选择性高的优点.该探针可应用于人血清样品中h_(2)s含量的检测,样品回收率为94.5%~96.1%.

关键词：金属有机框架 3,5-二硝基苯甲酸功能化荧光检测硫化氢

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Evidence for particle acceleration approaching PeV energies in the W51 complex

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science Bulletin 2024年第18期69卷 2833-2841页

作者： LhAAsO Collaboration Zhen Cao F.Aharonian Axikegu Y.X.Bai Y.W.Bao D.Bastieri X.J.Bi Y.J.Bi W.Bian A.V.Bukevich Q.Cao W.Y.Cao Zhe Cao J.Chang J.F.Chang A.m.Chen E.s.Chen h.X.Chen Liang Chen Lin Chen Long Chen m.J.Chen m.L.Chen Q.h.Chen s.Chen s.h.Chen s.Z.Chen T.L.Chen Y.Chen N.Cheng Y.D.Cheng.m.Y.Cui s.W.Cui X.h.Cui Y.D.Cui B.Z.Dai h.L.Dai Z.g.Dai Danzengluobu X.Q.Dong K.K.Duan J.h.Fan Y.Z.Fan J.Fang J.h.Fang K.Fang C.F.Feng h.Feng L.Feng s.h.Feng X.T.Feng Y.Feng Y.L.Feng s.gabici B.gao C.D.gao Q.gao W.gao W.K.gao m.m.ge L.s.geng g.giacinti g.h.gong Q.B.gou m.h.gu F.L.guo X.L.guo Y.Q.guo Y.Y.guo Y.A.han m.hasan h.h.he h.N.he J.Y.he Y.he Y.K.hor B.W.hou C.hou X.hou h.B.hu Q.hu s.C.hu D.h.huang T.Q.huang W.J.huang X.T.huang X.Y.huang Y.huang X.L.Ji h.Y.Jia K.Jia K.Jiang X.W.Jiang Z.J.Jiang.m.Jin m.m.Kang I.Karpikov D.Kuleshov K.Kurinov B.B.Li C.m.Li Cheng Li Cong Li D.Li F.Li h.B.Li h.C.Li Jian Li Jie Li K.Li s.D.Li W.L.Li W.L.Li X.R.Li Xin Li Y.Z.Li Zhe Li Zhuo Li E.W.Liang Y.F.Liang s.J.Lin B.Liu C.Liu D.Liu D.B.Liu h.Liu h.D.Liu J.Liu J.L.Liu m.Y.Liu R.Y.Liu s.m.Liu W.Liu Y.Liu Y.N.Liu Q.Luo Y.Luo h.K.Lv B.Q.ma L.L.ma X.h.ma J.R.mao Z.min W.mitthumsiri h.J.mu Y.C.Nan A.Neronov L.J.Ou P.Pattarakijwanich Z.Y.Pei J.C.Qi m.Y.Qi B.Q.Qiao J.J.Qin A.Raza D.Ruffolo A.sáiz m.saeed D.semikoz L.shao O.shchegolev X.D.sheng F.W.shu h.C.song Yu.V.stenkin V.stepanov Y.su D.X.sun Q.N.sun X.N.sun Z.B.sun J.Takata P.h.T.Tam Q.W.Tang R.Tang Z.B.Tang W.W.Tian C.Wang C.B.Wang g.W.Wang h.g.Wang h.h.Wang J.C.Wang Kai Wang Kai Wang L.P.Wang L.Y.Wang P.h.Wang R.Wang W.Wang X.g.Wang X.Y.Wang Y.Wang Y.D.Wang Y.J.Wang Z.h.Wang Z.X.Wang Zhen Wang Zheng Wang D.m.Wei J.J.Wei Y.J.Wei T.Wen C.Y.Wu h.R.Wu Q.W.Wu s.Wu X.F.Wu Y.s.Wu s.Q.Xi J.Xia g.m.Xiang D.X.Xiao g.Xiao Y.L.Xin Y.Xing D.R.Xiong Z.Xiong D.L.Xu R.F.Xu R.X.Xu W.L.Xu L.Xue D.h.Yan J.Z.Yan T.Yan C.W.Yang C.Y.Yang F.Yang F.F.Yang L.L.Yang.m.J.Yang R.Z.Yang W.X.Yang Y.h.Yao Z.g.Yao L.Q.Yin N.Yin X.h.You Z.Y.You Y.h.Yu Q.Yuan h.Yue h.D.Zeng T.X.Zeng W.Zeng.m.Zha B.B.Zhang F.Zhang h.Zhang 不详 Key Laboratory of Particle Astrophysics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of sciences Beijing 100049China TIANFU Cosmic Ray Research Center ChengduChina Dublin Institute for Advanced studies 31 Fitzwilliam Place2 DublinIreland max-Planck-Institut for Nuclear Physics P.O.Box 103980Heidelberg 69029Germany s.hool of Physical science and Technology&s.hool of Information science and Technology Southwest Jiaotong UniversityChengdu 610031China s.hool of Astronomy and space science Nanjing UniversityNanjing 210023China Center for Astrophysics Guangzhou UniversityGuangzhou 510006China Tsung-Dao Lee Institute&s.hool of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Institute for Nuclear Research of Russian Academy of sciences Moscow 117312Russia hebei Normal University Shijiazhuang 050024China University of science and Technology of China Hefei 230026China state Key Laboratory of Particle Detection and Electronics China Key Laboratory of Dark matter and space Astronomy&Key Laboratory of Radio Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjing 210023China Research Center for Astronomical Computing Zhejiang LaboratoryHangzhou 311121China Key Laboratory for Research in galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China s.hool of Physics and Astronomy Yunnan UniversityKunming 650091China Key Laboratory of Cosmic Rays(Tibet University) Ministry of EducationLhasa 850000China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China s.hool of Physics and Astronomy(Zhuhai)&s.hool of Physics(guangzhou)&sino-French Institute of Nuclear Engineering and Technology(Zhuhai) Sun Yat-sen UniversityZhuhai 519000&Guangzhou 510275GuangdongChina Institute of Frontier and Interdisciplinary science Shandong UniversityQingdao 266237China APC UniversitéParis Cité

Theγ-ray emission from the W51 complex is widely acknowledged to be attributed to the interaction between the cosmic rays(CRs)accelerated by the shock of supernova remnant(sNR)W51C and the dense molecular clouds in the adjacent star-forming region,***,the maximum acceleration capability of W51C for CRs remains *** on observations conducted with the Large high Altitude Air shower Observatory(LhAAsO),we report a significant detection ofγrays emanating from the W51 complex,with energies from 2 to 200 *** LhAAsO measurements,for the first time,extend theγ-ray emission from the W51 complex beyond 100 TeV and reveal a significant spectrum bending at tens of *** combining the"π^(0)-decay bump"featured data from Fermi-LAT,the broadbandγ-ray spectrum of the W51 region can be well-characterized by a simple pp-collision *** observed spectral bending feature suggests an exponential cutoff at~400 TeV or a power-law break at~200 TeV in the CR proton spectrum,most likely providing the first evidence of sNRs serving as CR accelerators approaching the PeV ***,two young star clusters within W51B could also be theoretically viable to produce the most energeticγrays observed by *** findings strongly support the presence of extreme CR accelerators within the W51 complex and provide new insights into the origin of galactic CRs.

关键词： UhE c-ray Cosmic rays sNR W51C star clusters

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大孔树脂纯化香蕉皮缩合单宁的吸附特性分析与工艺优化

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农业工程学报 2024年第13期40卷 302-310页

作者：盛倩茹王娟华南理工大学食品科学与工程学院广州510640

为提高香蕉皮缩合单宁提取物纯度,提升其后续研究与利用价值,该研究采用大孔树脂吸附法纯化香蕉皮缩合单宁,通过比较6种大孔树脂的吸附与解吸性能,筛选出最适宜的树脂型号,并从动力学和热力学的角度分析该树脂对香蕉皮缩合单宁的吸附特... 详细信息

为提高香蕉皮缩合单宁提取物纯度,提升其后续研究与利用价值,该研究采用大孔树脂吸附法纯化香蕉皮缩合单宁,通过比较6种大孔树脂的吸附与解吸性能,筛选出最适宜的树脂型号,并从动力学和热力学的角度分析该树脂对香蕉皮缩合单宁的吸附特性,探究其纯化工艺条件。结果表明:hP-20型大孔树脂是纯化香蕉皮缩合单宁的适宜树脂;静态吸附-解吸动力学试验表明hP-20树脂分别在8、5 h内能够完成对香蕉皮缩合单宁的吸附、解吸过程,该吸附过程符合伪二阶动力学方程(R^(2)=0.997 2);Freundlich热力学模型适用于解释树脂与缩合单宁间的相互作用,这是一种发生在多分子层表面的吸附,模型常数K_(F)与温度成正相关,表明升温利于吸附的进行;热力学参数计算结果为Δgh=5.13 kJ/mol,Δs=47.28 J/mol·K,进一步证明了该过程是自发的、吸热的过程,且物理吸附占据主导作用,无序性有所增加。较佳的纯化参数是上样浓度为6 mg.mL、上样流速为1.5 mL/min、上样量为200 mL、洗脱液乙醇浓度为70%、洗脱流速为1.5 mL/min、洗脱液用量为120 mL。经该条件纯化后,香蕉皮缩合单宁纯度由5.79%提高到68.44%。说明hP-20树脂和优化参数对香蕉皮缩合单宁的纯化效果良好。

关键词：单宁树脂纯化香蕉皮缩合单宁吸附特性

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