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Chinese Chemical Letters 2024年第5期35卷 77-84页

作者： xiao-Hong Yi Chong-Chen Wang Beijing Key Laboratory of Functional Materials for Building structure and Environment Remediation School of Environment and Energy EngineeringBeijing University of Civil Engineering and ArchitectureBeijing 100044China

Water pollution caus.d.by global population growth,urban expansion and industrialization development is one of the urgent issues that need to be address.d.in the 21st *** to now,it was challenging for metal-organic frameworks(MOFs)to be us.d.in the actual water treatment due to that the powder MOFs suffered from difficult reuse,poor water stability and easy *** is an effective strategy to immobilize MOFs powder onto porous sponge foam carriers for accomplishing large flux,facile recycling,easy processing water treatment *** this review article,the fabrication approaches and applications of different MOFs/sponge composites were highlighted,in which the fluorescence detection of pollutants,adsorption and separation of pollutants,catalytic reduction and oxidation of pollutants were ***,the future challenges and opportunities of MOF/sponge for water treatment are propos.d.aiming to provide in-depth guidance for the future design and manufacture of the immobilized MOFs onto sponge foams.

关键词： Metal-organic frameworks sponge foam Water decontamination Adsorption Catalysis

Adsorption and sensing characteristics of insulating gas C4F7N on 3d late transition metal-phthalocyanine:Theoretical and experimental study

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High Voltage 2024年第4期9卷 870-878页

作者： dachang Chen Ziang Zheng Cong Zhang Yi Luo song xiao Qing Miao Ke Liu Beibei xiao school of Electrical and Electronic Engineering Wuhan Polytechnic UniversityWuhanChina Beijing International s&T Cooperation Base for Plasma science and Energy Conversion Institute of Electrical EngineeringChinese Academy of SciencesBeijingChina school of Electrical Engineering and Automation Wuhan UniversityWuhanChina school of Energy and Power Engineering Jiangsu University of Science and TechnologyZhenjiangChina

Heptafluoroisobutyronitrile(C_(4)F_(7)N)is being cons.d.red as a promising alternative to the greenhouse gas sF6 in the electrical ***,its biotoxicity necessitates the development of gas sensing technology to detect leaked C_(4)F_(7)N.A combination of density functional theory and experiments was employed to evaluate the adsorption and sensing performance of different metal-phthalocyanines as potential sensing materials for C_(4)F_(7)N *** study included exploring adsorption configurations with adsorption energies,electron transfer,and adsorption distance,as well as comparisons of electronic properties,electron distribution,and density of states.d.s)among the ***,gas sensing experiments were conducted using different MPcs to detect 25-100 ppm C_(4)F_(7)*** results revealed that Mn-Pc,Fe-Pc,Co-Pc,and Zn-Pc exhibited cons.d.rable chemical interactions,while Ni-Pc and Cu-Pc showed weaker adsorption *** findings were further elucidated bas.d.on the electron density and dOs of atomic ***,gas sensing experiments indicated that Co-Pc demonstrated a higher response compared to Fe-Pc at the same concentration of C_(4)F_(7)***,the theoretical and experimental insights offer valuable guidance for C_(4)F_(7)N detection and provide a systematic approach to screen and explore organometallic polymer-bas.d.gas sensors applicable in various fields.

关键词： adsorption phthalocyanine Adsorption

Foreshock as a source Region of Electron-scale Magnetic Holes in the solar Wind at 1 au

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Foreshock as a Source Region of Electron-scale Magnetic Hole...

Particle segregation mechanism of s.d.system in a rotating drum

作者： Wang,G.Q. Volwerk,M. xiao,s.d. Wu,M.Y. Chen,Y.Q. Zhang,T.L.

Electron-scale magnetic holes(EsMHs) can dissipate energy and transport electrons in astrophysical *** are often observed in the solar wind at 1 au,but whether they are locally generated remains *** we investigate the EsMHs in the solar wind at 1 au bas.d.on observations of the Magnetospheric Multiscale(MMs) and Acceleration,Reconnection,

关键词： Foreshock as a source Region of Electron-scale Magnetic Holes in the solar Wind at 1 au MMs

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Particuology 2024年第10期93卷 300-308页

作者： Erliang xiao Wei Zhang Zhipeng Chi Ran Li Hui Yang school of Optical-Electricaland Computer Engineering University of Shanghai for Science and Technology Shanghai 200093Chin Collegeof Medical instrumentation hanghai Universty of Medicine&Health ScienceShanghaiChina

Complex segregation occurs in a binary particle system with differing particle sizes and densities,particularly when the larger particles are heavier(s.d.system,i.e.,size minus.d.nsity system).Predicting the segregation pattern driven by multiple mechanisms simultaneously is often *** study explores the segregation mechanisms in a quasi-2d circular drum containing a s.d.system,realizing a transition between the s-core and Core-and-band patterns by adjusting the drum rotation *** the transition of the segregation pattern,only the s-core pattern chiefly driven by the percolation mechanism is initially *** the rotation speed increases,the buoyancy mechanism and particle diffusion gradually strengthen,jointly driving the formation of the Core-and-band pattern.A dimensionless strength ratio,λ=H/h,where H and h respectively represent the diffusion and buoyancy strengths at length scales,is introduced to elucidate this *** Core-and-band pattern emerges whenλreached 1.4.

关键词： Particle segregation s.d.ystem segregationmechanisms competition segregation pattern Rotating drum

3d robust anisotropic diffusion filtering algorithm for sparse view neutron computed tomography 3d image reconstruction

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Nuclear science and Techniques 2024年第3期35卷 13-29页

作者： Yang Liu Teng-Fei Zhu Zhi Luo xiao-Ping Ouyang school of Nuclear science and Engineering North China Electric Power UniversityBeijing 102206China state Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China state Key Laboratory of Intense Puls.d.Radiation simulation and Effect Xi’an 710024China

The most critical part of a neutron computed tomography(NCT) system is the image processing algorithm,which directly affects the quality and speed of the reconstructed *** types of noise in the system can degrade the quality of the reconstructed ***,to improve the quality of the reconstructed images of NCT systems,efficient image processing algorithms must be *** anisotropic diffusion filtering(AdF) algorithm can not only effectively suppress the noise in the projection data,but also preserve the image edge structure information by reducing the diffusion at the image ***,we propose the application of the AdF algorithm for NCT image *** compare the performance of different algorithms in NCT systems,we reconstructed images using the ordered subset simultaneous algebraic reconstruction technique(Os-sART) algorithm with different regular terms as image processing *** the iterative reconstruction,we selected two image processing algorithms,the Total Variation and split Bregman solved total variation algorithms,for comparison with the performance of the AdF ***,the filtered back-projection algorithm was us.d.for comparison with an iterative *** reconstructing the projection data of the numerical and clock models,we compared and analyzed the effects of each algorithm applied in the NCT *** on the reconstruction results,Os-sART-AdF outperformed the other algorithms in terms of denoising,preserving the edge structure,and suppressing *** example,when the 3d shepp–Logan was reconstructed at 25 views,the root mean square error of Os-sART-AdF was the smallest among the four iterative algorithms,at only *** universal quality index,mean structural similarity,and correlation coefficient of the reconstructed image were the largest among all algorithms,with values of 0.9877,0.9878,and 0.9887,respectively.

关键词： NCT Os-sART sparse-view Anisotropic diffusion filtering

Field-Aligned Currents Originating From the Chaotic Motion of Electrons in the Tilted Current sheet:MMs Observations

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Field-Aligned Currents Originating From the Chaotic Motion o...

sparse-view neutron CT 3d image reconstruction algorithm bas.d.on split Bregman method

作者： Wang,G.Q. Zhang,T.L. Wu,M.Y. xiao,s.d. Wang,G. Chen,Y.Q. sun,J.C. Volwerk,M.

Field-aligned currents often appear at the neutral sheet in the tilted current sheet,however,their origins are still *** we investigate two flapping motion events using the Magnetospheric Multiscale mission *** current densities mainly contributed by electrons appear near the neutral sheet in the severely titled current sheet in both events.

关键词： Field-Aligned Currents Originating From the Chaotic Motion of Electrons in the Tilted Current sheet:MMs Observations MMs

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Nuclear science and Techniques 2024年第9期35卷 41-55页

作者： Teng-Fei Zhu Yang Liu Zhi Luo xiao-Ping Ouyang school of Nuclear science and Engineering North China Electric Power UniversityBeijing 102206China state Key Laboratory of Nuclear Resources and Environment East China University of TechnologyNanchang 330013China state Key Laboratory of Intense Puls.d.Radiation simulation and Effect Xi’an 710024China

As a complement to X-ray computed tomography(CT),neutron tomography has been extensively us.d.in nuclear engineer-ing,materials science,cultural heritage,and industrial *** of the attenuation matrix for neutron tomography with a traditional analytical algorithm requires hundreds of projection views in the range of 0°to 180°and typically takes several hours to *** a low time-resolved resolution degrades the quality of neutron *** the number of projection acquisitions is an important approach to improve the time resolution of images;however,this requires efficient reconstruction ***,sparse-view reconstruction algorithms in neutron tomography need to be *** this study,we investigated the three-dimensional reconstruction algorithm for sparse-view neu-tron CT *** enhance the reconstructed image quality of neutron CT,we propose an algorithm that uses Os-sART to reconstruct images and a split Bregman to solve for the total variation(sBTV).A comparative analysis of the performances of each reconstruction algorithm was performed using simulated and actual experimental *** to the analyzed results,Os-sART-sBTV is superior to the other algorithms in terms of denoising,suppressing artifacts,and preserving detailed structural information of images.

关键词： Neutron CT Os-sART sparse-view 3d reconstruction split Bregman Total variation

Functionalization of cellulose carbon dots with different elements(N,B and s)for mercury ion detection and anti-counterfeit applications

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Chinese Chemical Letters 2024年第7期35卷 355-359页

作者： xiaoning Li Quanyu shi Meng Li Ningxin song Yumeng xiao Huining xiao Tony d.James Lei Feng second Affiliated Hospital of dalian Medical University Dalian 116023China Hebei Key Lab of Power Plant Flue Gas Multi-Pollutants Control Department of Environmental Science and EngineeringNorth China Electric Power UniversityBaoding 071003China department of Chemical Engineering and Limerick Pulp&Paper Centre University of New Brunswick15 Dineen DriveFredericton NB E3B 5A3Canada department of Chemistry University of BathBath BA27AYUnited Kingdom school of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

Mercury ion(Hg^(2+)),as one of the most toxic heavy metal ions,accumulates easily in the environment,which can generate potential hazards to the ecosystem and human *** effectively detect and remove Hg^(2+),we fabricated four types of carbon dots(Cds)using carboxymethyl nanocellulose as a carbon source doped with different elements using a hydrothermal *** the Cds exhibited a strong fluorescence emission,excitation-dependent emission and possess.d.good water ***,the four fluorescent Cds were us.d.for Hg^(2+)recognition in aqueous solution,where the Cds-N exhibited better sensitivity and selectivity for Hg^(2+)detection,with a low limit of detection of 8.29×10^(-6)mol/*** was.d.termined that the fluorescence quenching could be ascribed to a photoinduced charge-transfer processes between Hg^(2+)and the *** addition,the Cds-N were us.d.as a smart invisible ink for anticounterfeiting,information encryption and ***,the Cds-N were immers.d.into a cellulose(CMC)-bas.d.hydrogel network to prepare fluorescent hydrogels capable of simultaneously detecting and adsorbing Hg^(2+).We anticipate that this research will open possibilities for a green method to synthesize fluorescent Cds for metal ion detection and fluorescent ink production.

关键词： Carbon dots Functional groups Hg^(2+)detection Mechanism Anti-counterfeiting

A mixed-valence polyoxometalate-bas.d.3d inorganic framework cathode material for high-efficiency rechargeable AZIBs

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Rare Metals 2024年第8期43卷 3677-3691页

作者： Qing Han Hao-Ran xiao Tao Zhou Bing-Chuan Li Liu Yang Ling-Ling Xie Xue-Jing Qiu Xian-Yong Wu Li-Min Zhu xiao-Yu Cao school of Chemistry and Chemical Engineering Henan University of TechnologyZhengzhou 450001China Key Laboratory of High specific Energy Materials for Electrochemical Power sources of Zhengzhou City Zhengzhou 450001China College of Materials Engineering Henan University of EngineeringZhengzhou450007China school of Environmental Engineering Henan University of TechnologyZhengzhou 450001China department of Chemistry University of Puerto Rico-Rio Piedras CampusSan JuanPR 00925USA

The global trend towards new energy storage systems has stimulated the development of electrochemical energy storage *** these technologies,rechargeable aqueous zinc-ion batteries(AZIBs)have attracted cons.d.rable interest as a potential alternative to lithium-ion batteries(LIBs.d.e to their affordable cost,environmental compatibility and high safety *** this study,a high-quality electrode for AZIBs has been successfully developed using a dehydrated mixed-valence polyoxometalate-bas.d.three-dimensional(3d)inorganic framework material known as[H_6Mn_(3)V^Ⅳ_(15)V-^Ⅴ_(4O)_(46)(H_2O)_(12)](3d-MnVO).This innovative 3d-MnVO material is built from the alternate connections of{V_(19)O_(46)}"sphere-shaped"clusters andμ_(2)-{Mn(H_(2)O)_(4)}bridges,where each{V_(19)O_(46)}cluster is surrounded by three pairs of vertically distributed{Mn(H_(2)O)_(4)}units,thus resulting in the 3d interpenetrating grid-like network from the infinite[-{V_(19)O_(46)}-μ_(2)-Mn(H_(2)O)_(4)-{V_(19)O_(46)}]_∞chains in three mutually perpendicular *** 3d framework structure of 3d-MnVO possesses abundant oxygen vacancies,spacious and multi-level interconnected channels for ion transport,which facilitates the efficient intercalation/deintercalation of hydrated Zn^(2+)into the pores of the primary structure via the intercalation capacitance *** a result,the 3d-MnVO electrode exhibits excellent diffusion rates and minimal interfacial *** a current density of 0.1 A·g^(-1),the 3d-MnVO cathode delivers a commendable discharge capacity of170.5 mAh·g^(-1)with 81.6%capacity retention after100 charge/discharge ***,even at a high current density of 1.0 A·g^(-1),the 3d-MnVO electrode delivers a remarkable reversible capacity of198.9 mAh·g^(-1).Our research results provide valuable insights into the development of advanced polyoxometalate-bas.d.3d inorganic framework electrode materials for high-performance rechargeable AZIBs.

关键词： Cathode Polyoxometalate 3d inorganic framework Zinc-ion batteries Energy storage mechanism

Facile sERs screening of melamine in bovine milk with 2d printed AgNPs/glass fabric filter paper as the flexible substrate

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Food science and Human Wellness 2024年第5期13卷 2595-2600页

作者： shiyao Wang Yanan Zhao xiao Wei Yisheng Chen College of Food science and Engineering Shanxi Agricultural UniversityTaigu 030801China Food Nutrition and safety Institute Shanxi Agricultural UniversityTaiyuan 030031China school of Food science and Technology Jiangnan UniversityWuxi 214122China

Melamine is one of the most frequently detected adulterants in dairy *** current study proposes a surface-enhanced Raman spectroscopy(sERs)-bas.d.analytical tool for fast and reliable screening of melamine in bovine milk.A hand-held Raman spectrometer was us.d.in conjunction with a substrate compos.d.of silver nanoparticles(AgNPs)that was 2d printed onto glass fiber(GF)filter *** optimized conditions,a sensitive and fingerprint-like signal at 674 cm^(-1) was *** AgNPs/GF substrate exhibited high sensitivity to melamine in milk down to 1.9498×10^(-5)mg/mL,which is well below the UsA and EU safety limits(2.5×10^(-3)mg/mL).Remarkably,the propos.d.technology was also highly reproducible,showing spot-to-spot and block-to-block variations below 3.3%and 4.9%at 674 cm^(-1) in Raman intensity,*** characteristic peak intensity and concentration of melamine showed an acceptable linear relationship(R^(2)=0.9909)within the range of 0.0001-1 mg/***,the method established in this study can provide an efficient and effective method for the quantitative target screening and detection of melamine in dairy products.

关键词： 2d print Melamine Milk surface-enhanced Raman spectroscopy(sERs) flexible substrate