Aqueous zinc-ion batteries have broad application prospects due to the eco-friendliness,cost-economy and high safety.However,the scarcity of high-performance cathodes with outstanding rate capability and long lifespan...Aqueous zinc-ion batteries have broad application prospects due to the eco-friendliness,cost-economy and high safety.However,the scarcity of high-performance cathodes with outstanding rate capability and long lifespan has affected their development.Herein,we report a metallic vanadium trioxide material intercalated with phase transformation as cathode applied in aqueous zinc-ion batteries.It offers satisfactory electrochemical performances with a high specific capacity(435 mAh g^(-1) at 0.5 A g^(-1)),decent power density(5.23 kW kg^(-1))and desired energy density(331 Wh kg^(-1)),as well as good cyclability.The superior performance originates from the stable structure and fast Zn^(2+)diffusion,enabled by the pre-intercalation of Zn^(2+)and water molecules.展开更多
The widespread nitrogen oxides(NOx,mainly in NO)in the atmosphere have threatened human health and ecological environment.The dilute NO(ppb)is difficult to efficiently remove via the traditional process due to its cha...The widespread nitrogen oxides(NOx,mainly in NO)in the atmosphere have threatened human health and ecological environment.The dilute NO(ppb)is difficult to efficiently remove via the traditional process due to its characteristics of low concentration,wide range,large total amount,etc.Photocatalysis can utilize solar energy to purify NO pollutants under mild conditions,but its application is limited due to the low selectivity of nitrate and poor activity of NO removal.The underlying reason is that the interface mechanism of NO oxidation is not clearly understood,which leads to the inability to accurately regulate the NO oxidation process.Herein,the recent advances in the photocatalytic oxidation of NO are summarized.Firstly,the common strategies to effectively regulate carrier dynamics such as morphology control,facet engineering,defect engineering,plasma coupling,heterojunction and single-atom catalysts are discussed.Secondly,the progress of enhancing the adsorption and activation of reactants such as NO and O_(2) during NO oxidation is described in detail,and the corresponding NO oxidation mechanisms are enumerated.Finally,the challenges and prospects of photocatalytic NO oxidation are presented in term of nanotechnology for air pollution control.This review can shed light on the interface mechanism of NO oxidation and provide illuminating information on designing novel catalysts for efficient NOx control.展开更多
DNA sequencers have become increasingly important research and diagnostic tools over the past 20 years.In this study,we developed a single-molecule desktop sequencer,GenoCare 1600(GenoCare),which utilizes amplificatio...DNA sequencers have become increasingly important research and diagnostic tools over the past 20 years.In this study,we developed a single-molecule desktop sequencer,GenoCare 1600(GenoCare),which utilizes amplification-free library preparation and two-color sequencing-by-synthesis chemistry,making it more user-friendly compared with previous single-molecule sequencing platforms for clinical use.Using the GenoCare platform,we sequenced an Escherichia coli standard sample and achieved a consensus accuracy exceeding 99.99%.We also evaluated the sequencing performance of this platform in microbial mixtures and coronavirus disease 2019(COVID-19)samples from throat swabs.Our findings indicate that the GenoCare platform allows for microbial quantitation,sensitive identification of the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)virus,and accurate detection of virus mutations,as confirmed by Sanger sequencing,demonstrating its remarkable potential in clinical application.展开更多
Rational engineering of oxygen vacancy(VO) at atomic precision is the key to comprehensively understanding the oxygen chemistry of oxide materials for catalytic oxidations. Here, we demonstrate that VO can be spatiall...Rational engineering of oxygen vacancy(VO) at atomic precision is the key to comprehensively understanding the oxygen chemistry of oxide materials for catalytic oxidations. Here, we demonstrate that VO can be spatially confined on the surface through a sophisticated surface hydrogen bond(HB) network.The HB network is constructed between a hydroxyl-rich Bi OCl surface and polyprotic phosphoric acid,which remarkably decreases the formation energy of surface VO by selectively weakening the metal–oxygen bonds in a short range. Thus, surface-confined VO enables us to unambiguously distinguish the intrafacial and suprafacial oxygen species associated with NO oxidation in two classical catalytic systems.Unlike randomly distributed bulk VO that benefits the thermocatalytic NO oxidation and lattice O diffusion by the dominant intrafacial mechanism, surface VOis demonstrated to favor the photocatalytic NO oxidation through a suprafacial scheme by energetically activating surface O2, which should be attributed to the spatial confinement nature of surface VO.展开更多
Rapid development ofwearable electronicswith various functionalities has stimulated the demand to construct functional fiber devices due to their merits of mechanical flexibility,weavability,miniaturization,and integr...Rapid development ofwearable electronicswith various functionalities has stimulated the demand to construct functional fiber devices due to their merits of mechanical flexibility,weavability,miniaturization,and integrability.To this end,fiber components which can realize the functions of energy storage and conversion,actuating plus sensing have gained increasing concerns.Herein,we summarize the recent progress with respect to fiber material preparation,innovative structure design,and device performance in this review,also highlighting the possibility of integrated fiber electronics as an extension of application,the remaining challenges and future perspectives toward next-generation smart systems and to facilitate their commercialization.展开更多
文摘针对当前航天飞行训练模拟器交付后边训边改的新情况,为研究和改进其质量管理方法,基于国军标《质量管理体系要求》的相关要求,引入经典“比例积分微分(Proportional-Integral-Derivative Control,PID)”控制理论,建立本地化质量管理模型。该模型从系统联试、教员试训和专家确认3个方面进行质量管理调控,再通过训练保障环节检验和反馈质量控制效果,实现了质量管理闭环控制。无论是整个航天飞行训练模拟器质量管理,还是其“导航、制导与控制(Guidance Navigation and Control,GNC)”仿真软件等子系统的质量管理,该模型均行之有效,可快速达到预期的质量管理目标。
基金financially supported by the National Natural Science Foundation of China(51872139,51902158,and 51903121)the Recruitment Program of Global Experts(1211019)+2 种基金the“Six Talent Peak”Project of Jiangsu Province(XCL-043,XCL-021 and XCL-018)the Natural Science Foundation of Jiangsu Higher Education Institutions(19KJB430002 and 18KJB150016)the start-up fund from Nanjing Tech University(3983500197 and 3827401784)。
文摘Aqueous zinc-ion batteries have broad application prospects due to the eco-friendliness,cost-economy and high safety.However,the scarcity of high-performance cathodes with outstanding rate capability and long lifespan has affected their development.Herein,we report a metallic vanadium trioxide material intercalated with phase transformation as cathode applied in aqueous zinc-ion batteries.It offers satisfactory electrochemical performances with a high specific capacity(435 mAh g^(-1) at 0.5 A g^(-1)),decent power density(5.23 kW kg^(-1))and desired energy density(331 Wh kg^(-1)),as well as good cyclability.The superior performance originates from the stable structure and fast Zn^(2+)diffusion,enabled by the pre-intercalation of Zn^(2+)and water molecules.
基金supported by the National Natural Science Foundation of China(Nos.22022608,21876113,22176127,21261140333,22106105 and 62071300)the Shanghai Engineering Research Center of Green Energy Chemical Engineering(No.18DZ2254200)+3 种基金“111”Innovation and Talent Recruitment Base on Photochemical and Energy Materials(No.D18020)Shanghai Government(Nos.22010503400,18SG41 and YDZX20213100003002)Shanghai Scientific and Technological Innovation Project(No.21DZ1206300)Shanghai Sailing Program(No.22YF1430400)。
文摘The widespread nitrogen oxides(NOx,mainly in NO)in the atmosphere have threatened human health and ecological environment.The dilute NO(ppb)is difficult to efficiently remove via the traditional process due to its characteristics of low concentration,wide range,large total amount,etc.Photocatalysis can utilize solar energy to purify NO pollutants under mild conditions,but its application is limited due to the low selectivity of nitrate and poor activity of NO removal.The underlying reason is that the interface mechanism of NO oxidation is not clearly understood,which leads to the inability to accurately regulate the NO oxidation process.Herein,the recent advances in the photocatalytic oxidation of NO are summarized.Firstly,the common strategies to effectively regulate carrier dynamics such as morphology control,facet engineering,defect engineering,plasma coupling,heterojunction and single-atom catalysts are discussed.Secondly,the progress of enhancing the adsorption and activation of reactants such as NO and O_(2) during NO oxidation is described in detail,and the corresponding NO oxidation mechanisms are enumerated.Finally,the challenges and prospects of photocatalytic NO oxidation are presented in term of nanotechnology for air pollution control.This review can shed light on the interface mechanism of NO oxidation and provide illuminating information on designing novel catalysts for efficient NOx control.
文摘DNA sequencers have become increasingly important research and diagnostic tools over the past 20 years.In this study,we developed a single-molecule desktop sequencer,GenoCare 1600(GenoCare),which utilizes amplification-free library preparation and two-color sequencing-by-synthesis chemistry,making it more user-friendly compared with previous single-molecule sequencing platforms for clinical use.Using the GenoCare platform,we sequenced an Escherichia coli standard sample and achieved a consensus accuracy exceeding 99.99%.We also evaluated the sequencing performance of this platform in microbial mixtures and coronavirus disease 2019(COVID-19)samples from throat swabs.Our findings indicate that the GenoCare platform allows for microbial quantitation,sensitive identification of the severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)virus,and accurate detection of virus mutations,as confirmed by Sanger sequencing,demonstrating its remarkable potential in clinical application.
基金the National Key Research and Development Program of China (2016YFA0203000)National Natural Science Funds for Distinguished Young Scholars (21425728)+2 种基金the National Natural Science Foundation of China (21872061)111 Project (B17019)Self-Determined Research Funds of CCNU from the Colleges’ Basic Research and Operation of MOE (CCNU16A02029)。
文摘Rational engineering of oxygen vacancy(VO) at atomic precision is the key to comprehensively understanding the oxygen chemistry of oxide materials for catalytic oxidations. Here, we demonstrate that VO can be spatially confined on the surface through a sophisticated surface hydrogen bond(HB) network.The HB network is constructed between a hydroxyl-rich Bi OCl surface and polyprotic phosphoric acid,which remarkably decreases the formation energy of surface VO by selectively weakening the metal–oxygen bonds in a short range. Thus, surface-confined VO enables us to unambiguously distinguish the intrafacial and suprafacial oxygen species associated with NO oxidation in two classical catalytic systems.Unlike randomly distributed bulk VO that benefits the thermocatalytic NO oxidation and lattice O diffusion by the dominant intrafacial mechanism, surface VOis demonstrated to favor the photocatalytic NO oxidation through a suprafacial scheme by energetically activating surface O2, which should be attributed to the spatial confinement nature of surface VO.
基金NationalNatural Science Foundation ofChina,Grant/Award Numbers:51872139,51903121Natural Science Foundation ofJiangsu Province,Grant/Award Number:BK20190683+2 种基金Natural Science Foundationof Jiangsu Higher Education Institutions,Grant/Award Number:18KJB150016“SixTalent Peak”Project of Jiangsu Province,Grant/Award Numbers:XCL-043,XCL-018Natural Science BasicResearch ProgramofShaanxi,Grant/Award Number:2019JLM-28。
文摘Rapid development ofwearable electronicswith various functionalities has stimulated the demand to construct functional fiber devices due to their merits of mechanical flexibility,weavability,miniaturization,and integrability.To this end,fiber components which can realize the functions of energy storage and conversion,actuating plus sensing have gained increasing concerns.Herein,we summarize the recent progress with respect to fiber material preparation,innovative structure design,and device performance in this review,also highlighting the possibility of integrated fiber electronics as an extension of application,the remaining challenges and future perspectives toward next-generation smart systems and to facilitate their commercialization.
