检索结果-南通市图书馆

Co/CoO heterojunction rich in oxygen vacancies introduced by O2 plasma embedded in mesoporous walls of carbon nanoboxes covered with carbon nanotubes for rechargeable zinc-air battery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Carbon Energy 2024年第7期6卷 14-25页

作者： Leijun Ye weiheng Chen Zhong-Jie jiang Zhongqing jiang Key Laboratory of Optical Field Manipulation of Zhejiang Province Department of PhysicsZhejiang Sci-Tech UniversityHangzhouChina Department of Mechanical Engineering Ningbo University of TechnologyNingboChina Guangzhou Key Laboratory for Surface Chemistry of Energy Materials Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy MaterialsCollege of Environment and EnergySouth China University of TechnologyGuangzhouChina

Herein,Co/CoO heterojunction nanoparticles(nPs)rich in oxygen vacancies embedded in mesoporous walls of nitrogen-doped hollow carbon nanoboxes coupled with nitrogen-doped carbon nanotubes(P-Co/CoOV@nHCnb@nCnT)are well designed through zeolite-imidazole framework(ZIF-67)carbonization,chemical vapor deposition,and O_(2) plasma *** a result,the threedimensional nHCnbs coupled with nCnTs and unique heterojunction with rich oxygen vacancies reduce the charge transport resistance and accelerate the catalytic reaction rate of the P-Co/CoOV@nHCnb@nCnT,and they display exceedingly good electrocatalytic performance for oxygen reduction reaction(ORR,halfwave potential[EORR,1/2=0.855 V *** hydrogen electrode])and oxygen evolution reaction(OER,overpotential(η_(OER,10)=377mV@10mA cm^(−2)),which exceeds that of the commercial Pt/C+RuO_(2) and most of the formerly reported ***,both the aqueous and flexible foldable all-solid-state rechargeable zinc-air batteries(ZAbs)assembled with the P-Co/CoOV@nHCnb@nCnT catalyst reveal a large maximum power density and outstanding long-term cycling ***-principles density functional theory calculations show that the formation of heterojunctions and oxygen vacancies enhances conductivity,reduces reaction energy barriers,and accelerates reaction kinetics *** work opens up a new avenue for the facile construction of highly active,structurally stable,and cost-effective bifunctional catalysts for ZAbs.

关键词： heterojunction oxygen evolution/reduction reaction oxygen vacancies rechargeable zinc–air battery three‐dimensional nitrogen‐doped hollow carbon nanoboxes

Mo_(2)b_(2)O_(2)Mbene for Efficient Electrochemical CO Reduction to C_(2)Chemicals:Computational Exploration

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第6期7卷 342-350页

作者： bikun Zhang Jianwen jiang Department of Chemical and biomolecular Engineering National University of SingaporeSingapore 117576Singapore

Emerging as a new class of two-dimensional materials with atomically thin layers,Mbenes have great potential for many important applications such as energy storage and *** mitigating carbon footprint,there has been increasing interest in CO_(2)/CO conversion on Mbenes,but mostly focused on C_(1)products.C^(2+)chemicals generally possess higher energy densities and wider applications than C_(1)***,C–C coupling is technically challenging because of high energy requirement and currently few catalysts are suited for this ***,we explore electrochemical CO reduction reaction to C_(2)chemicals on Mo_(2)b_(2)O_(2)Mbene via density-functional theory ***,the most favorable CO–COH coupling is revealed to be a spontaneous and barrierless process,making Mo_(2)b_(2)O_(2)an efficient catalyst for C–C *** C_(1)and C_(2)chemicals,ethanol is predicted to be the primary ***,by charge and bond analysis,it is unraveled that there exist significantly more unbonded electrons in the C atom of intermediate*COH than other C_(1)intermediates,which is responsible for the facile C–C *** an atomic scale,this work provides microscopic insight into C–C coupling process and suggests Mo_(2)b_(2)O_(2)a promising catalyst for electrochemical CO reduction to C_(2)chemicals.

关键词： C_(2)chemicals C-C coupling density-functional theory Mbene Mo2b2O2

Drug-Target Interactions Prediction based on Signed Heterogeneous Graph neural networks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Electronics 2024年第1期33卷 231-244页

作者： Ming CHEn Yajian jiang Xiujuan LEI Yi PAn Chunyan JI wei jiang College of Information Science and Engineering Hunan Normal University School of Computer Science Shaanxi Normal University Faculty of Computer Science and Control Engineering Shenzhen Institute of Advanced TechnologyChinese Academy of Sciences Computer Science Department BNU-HKBU United International College

Drug-target interactions(DTIs) prediction plays an important role in the process of drug *** computational methods treat it as a binary prediction problem, determining whether there are connections between drugs and targets while ignoring relational types information. Considering the positive or negative effects of DTIs will facilitate the study on comprehensive mechanisms of multiple drugs on a common target, in this work, we model DTIs on signed heterogeneous networks, through categorizing interaction patterns of DTIs and additionally extracting interactions within drug pairs and target protein pairs. we propose signed heterogeneous graph neural networks(SHGnns), further put forward an end-to-end framework for signed DTIs prediction, called SHGnn-DTI,which not only adapts to signed bipartite networks, but also could naturally incorporate auxiliary information from drug-drug interactions(DDIs) and protein-protein interactions(PPIs). For the framework, we solve the message passing and aggregation problem on signed DTI networks, and consider different training modes on the whole networks consisting of DTIs, DDIs and PPIs. Experiments are conducted on two datasets extracted from Drug bank and related databases, under different settings of initial inputs, embedding dimensions and training modes. The prediction results show excellent performance in terms of metric indicators, and the feasibility is further verified by the case study with two drugs on breast cancer.

关键词： Drugs Training Proteins Measurement Message passing Prediction methods Graph neural networks

weighted multilinear p-adic Hardy operators and commutators on p-adic Herz-type spaces

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Applied Mathematics(A Journal of Chinese Universities) 2024年第3期39卷 554-570页

作者： MA Teng ZHOU jiang College of Mathematics and System Sciences Xinjiang UniversityUrumqi 830046China

In this paper,we introduce the weighted multilinear p-adic Hardy operator and weighted multilinear p-adic Ces`aro operator,we also obtain the boundedness of these two operators on the product of p-adic Herz spaces and p-adic Morrey-Herz spaces,the corresponding operator norms are also established in each ***,the boundedness of commutators of these two operators with symbols in central bounded mean oscillation spaces and Lipschitz spaces on p-adic Morrey-Herz spaces are also given.

关键词： Morrey-Herz spaces weighted multilinear p-adic Hardy operator commutators operator norms

维普期刊数据库

bionic functional membranes for separation of oil-in-water emulsions

在线全文

学校读者我要写书评

暂无评论

Friction 2024年第9期12卷 1909-1928页

作者： Chaolang CHEn Ruisong jiang Zhiguang GUO School of Mechanical Engineering Sichuan UniversityChengdu 610065China School of Materials Science and Engineering Hubei UniversityWuhan 430062China

The separation of oil-in-water emulsion is an urgent challenge because its massive production and discharge from daily and industrial activities have caused severe hazards to the ecosystem and serious threats to human *** technology is considered an outstanding solution strategy for the separation of oil-in-water emulsions due to its unique advantages of low cost,high efficiency,easy operation,and environmental ***,the membrane is easily fouled by the emulsion oil droplets during the separation process,causing a sharp decline in permeation flux,which greatly inhibits the long-term use of the membrane and largely shortens the membrane’s ***,it was found that endowing the membranes with special wettability e.g.,superhydrophilic and superoleophobic can greatly enhance the permeability of the continuous water phase and inhibit the adhesion of oil droplets,thus promoting the separation performance and anti-oil-fouling property of membrane for oily *** this paper,we review and discuss the recent developments in membranes with special wettability for separating oil-in-water emulsions,including the mechanism analysis of emulsion separation membrane,membrane fouling issues,design strategies,and representative studies for enhancing the membrane’s anti-oil-fouling ability and emulsion separation performance.

关键词： bionic surface membranes wettability oil-in-water emulsions oil-water separation

Prediction of chemical short-range order in high-/medium-entropy alloys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2024年第2期169卷 115-123页

作者： Pei-Yu Cao Jing wang Ping jiang Yun-jiang wang Fu-Ping Yuan Xiao-Lei wu State Key Laboratory of nonlinear Mechanics Institute of MechanicsChinese Academy of ScienceBeijing 100190China School of Engineering Science University of Chinese Academy of SciencesBeijing 100049China

Chemical short-range orders(CSROs),as the built-in sub-nanoscale entities in a high-/medium-entropy alloy(H/MEA),have aroused an ever-increasing *** multi-principal elements in an H/MEA to form a complex concentrated solution,a variety of sub-systems of species exist to induce the metastable ordered compounds as candidates for ultimate *** issues remain pending on the origin of CSROs as to how to judge if CSRO will form in an H/MEA and particularly,what kind of CSROs would be stably produced if there were multiple ***,the first-principles method,along with the proposed local formation energy calculation in allusion to the atomic-scale chemical heterogeneities,is used to predict the CSRO formation based on the mechanical stability,thermodynamic formation energy,and electronic *** simulations are detailed in an equiatomic ternary VConi MEA with three kinds of potential compounds,i.e.,L1_(1),L1_(2),and b2,in the face-centered cubic *** turns out that L1_(1)is stable but hard to grow up so as to become the final CSRO.L1_(1)is further predicted as CSROs in CrConi,but unable to form in FeConi and CrMnFeConi *** predictions are consistent with the experimental *** findings shed light on understanding the formation of *** method is applicable to other H/MEAs to design and tailor CSROs by tuning chemical species/contents and thermal processing for high performance.

关键词： Short-range order High-entropy alloy Microstructure First-principles calculation Gibbs free energy Local electronic density of states

Intermediate-mass black holes in Green pea galaxies(IMbH-GP)I:A candidate sample from LAMOST and SDSS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2024年第10期67卷 147-161页

作者： Ruqiu Lin Zhen-Ya Zheng Fang-Ting Yuan Jun-Xian wang Chunyan jiang ning jiang Lingzhi wang Linhua jiang Xiang Ji Shuairu Zhu Xiaodan Fu Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China School of Astronomy and Space Sciences University of Chinese Academy of SciencesBeijing 100049China CAS Key Laboratory for Research in Galaxies and Cosmology Department of AstronomyUniversity of Science and Technology of ChinaHefei 230026China Chinese Academy of Sciences South America Center for Astronomy(CASSACA) National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China CAS Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China Kavli Institute for Astronomy and Astrophysics Peking UniversityBeijing 100871China Department of Astronomy School of PhysicsPeking UniversityBeijing 100871China

The scaling relation of central massive black holes(M_(bH)s)and their host galaxies is well-studied for supermassive bHs(SM_(bH)s,M_(bH)≥10^(6)M_(⊙)).However,this relation has large uncertainties in the mass range of the intermediate-mass bHs(IM_(bH)s,M_(bH)~10^(3)-10^(6)M_(⊙)).Since Green pea(GP)galaxies are luminous compact dwarf galaxies,which may be likely to host less massive SM_(bH)s or even IM_(bH)s,we systematically search for M_(bH)s in a large sample of 2190 GP galaxies at znd SDSS spectroscopic ***,we report a newly discovered sample of 59 M_(bH) candidates with broad Hα*** sample has a median stellar mass of 108.83±0.11M_(⊙)and hosts M_(bH)s with single-epoch virial masses ranging from M_(bH)~10^(4.7)to 10^(8.5)M_(⊙)(median 105.85±0.64M_(⊙)).Among the 59 M_(bH) candidates,36 have black hole masses M_(bH)≤10^(6)M_(⊙)(IM_(bH) candidates),one of which even has M_(bH)■10^(5)M_(⊙).we find that the M_(bH)-M_(*)relation of our M_(bH) sample is consistent with the M_(bH)-M_(bulge)relation for SM_(bH)s,while is above the M_(bH)-M_(*)relation for M_(bH)s in dwarf galaxies in the same mass ***,we show that 25 M_(bH) candidates,including 4 IM_(bH) candidates,have additional evidence of black hole activities,assessed through various methods such as the broad-line width,bPT diagram,mid-infrared color,X-ray luminosity,and radio *** studies show that it is very promising to find IM_(bH)s in GP galaxies,and the bH sample so obtained enables us to probe the connection between the M_(bH)s and compact dwarf galaxies in the low-redshift Universe.

关键词： SMbHs IMbHs Green pea galaxies compact dwarf galaxies

维普期刊数据库

Defect Engineering and Carbon Supporting to Achieve ni‑Doped CoP_(3) with High Catalytic Activities for Overall water Splitting

在线全文

学校读者我要写书评

暂无评论

nano-Micro Letters 2024年第11期16卷 569-584页

作者： Daowei Zha Ruoxing wang Shijun Tian Zhong‑Jie jiang Zejun Xu Chu Qin Xiaoning Tian Zhongqing jiang Department of Physics Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China Department of Materials and Chemical Engineering Ningbo University of TechnologyNingbo 315211People’s Republic of China Guangzhou Key Laboratory for Surface Chemistry of Energy Materials Guangdong Engineering and Technology Research Center for Surface Chemistry of Energy MaterialsCollege of Environment and EnergySouth China University of TechnologyGuangzhou 510006People’s Republic of China

This work reports the use of defect engineering and carbon supporting to achieve metal-doped phosphides with high activities and stabilities for the hydrogen evolution reaction(HER)and the oxygen evolution reaction(OER)in alkaline ***,the nitrogen-doped carbon nanofiber-supported ni-doped CoP_(3) with rich P defects(Pv·)on the carbon cloth(p-niCoP/nCFs@CC)is synthesized through a plasma-assisted phosphorization *** p-niCoP/nCFs@CC is an efficient and stable catalyst for the HER and the *** only needs overpotentials of 107 and 306 mV to drive 100 mA cm^(-2) for the HER and the OER,*** catalytic activities are higher than those of other catalysts reported *** high activities of the p-niCoP/nCFs@CC mainly arise from its peculiar structural *** density functional theory calculation indicates that the Pv·richness,the ni doping,and the carbon supporting can optimize the adsorption of the H atoms at the catalyst surface and promote the strong electronic couplings between the carbon nanofiber-supported p-niCoP with the surface oxide layer formed during the OER *** gives the p-niCoP/nCFs@CC with the high activities for the HER and the *** used in alkaline water electrolyzers,the p-niCoP/nCFs@CC shows the superior activity and excellent stability for overall water splitting.

关键词： Plasma Electrocatalysis Hydrogen evolution reaction Oxygen evolution reaction water splitting

维普期刊数据库

numerical investigation of transient gas–solid heat transfer in a packed bed:Impact of intra-particle thermal diffusion

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第7期90卷 404-411页

作者： Hanqiao Che Yuanhe Yue Zhaohua jiang Duan Li School of Mechanical Engineering Guangxi UniversityNanningGuangxi530004China School of Chemical Engineering University of BirminghamBirminghamB152TTUK Hebei Engineering Research Center of Advanced Energy Storage Technology and Equipment School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China Hebei Key Laboratory of Thermal Science and Energy Clean Utilization School of Energy and Environmental EngineeringHebei University of TechnologyTianjin300401China School of Mechatronics and Vehicle Engineering Chongqing Jiaotong UniversityChongqing400074China School of Instrumentation and Opto-Electronic Engineering Beihang UniversityBeijing 100191China

The transient heat transfer behaviours in a packed bed have been studied using coupled computational fluid dynamics(CFD)and discrete element method(DEM).Intra-particle thermal diffusion,which is a crucial but rarely explored issue,is considered by introducing a one-dimensional diffusion equation in the DEM *** achieve a sufficiently long physical time of simulations,we further reduce the computational cost by applying periodic boundary condition to a small segment of the packed *** study demonstrates a shifting peak heat flow rate from the bottom to the top of the packed bed during the initial warming *** affirm that the influence of thermal diffusion within a particle is noteworthy only for particles exhibiting a high biot number(e.g.,bi=1.2).This insight enriches our understanding of heat transfer mechanisms in packed beds and their practical engineering applications.

关键词： Packed bed Intra-particle heat transfer CFD–DEM