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Achieving structurally stable O3-type layered oxide cathodes through site-specific cation-anion co-substitution for sodium-ion batteries

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Journal of Energy Chemistry 2024年第6期93卷 411-418,I0011页

作者： Yihao Shen Chen Cheng Xiao Xia Lei Wang Xi Zhou Pan zeng jianrong zeng Liang Zhang Institute of Functional Nano&Soft Materials(FUNSOM) Soochow UniversitySuzhou 215123JiangsuChina Institute for Advanced Study School of Mechanical EngineeringChengdu UniversityChengdu 610106SichuanChina Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow UniversitySuzhou 215123JiangsuChina

O3-type layered oxides have garnered great attention as cathode materials for sodium-ion batteries because of their abundant reserves and high theoretical ***,challenges persist in the form of uncontrollable phase transitions and intricate Na^(+)diffusion pathways during cycling,resulting in compromised structural stability and reduced capacity over *** study introduces a special approach employing site-specific Ca/F co-substitution within the layered structure of O_(3)-NaNi_(0.5)Mn_(0.5)O_(2) to effectively address these ***,the strategically site-specific doping of Ca into Na sites and F into O sites not only expands the Na^(+)diffusion pathways but also orchestrates a mild phase transition by suppressing the Na^(+)/vacancy ordering and providing strong metal-oxygen bonding strength,*** as-synthesized Na_(0.95)Ca_(0.05)Ni_(0.5)Mn_(0.5)O_(1.95)F_(0.05)(NNMO-CaF)exhibits a mild O3→O3+O'3→P3 phase transition with minimized interlayer distance variation,leading to enhanced structural integrity and stability over extended *** a result,NNMO-CaF delivers a high specific capacity of 119.5 mA h g^(-1)at a current density of 120 mA g^(-1)with a capacity retention of 87.1%after 100 *** study presents a promising strategy to mitigate the challenges posed by multiple phase transitions and augment Na^(+)diffusion kinetics,thus paving the way for high-performance layered cathode materials in sodium-ion batteries.

关键词： Sodium-ion batteries O3-type layered oxides Site-specific co-doping Phase transition

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Supported Cu/Ni Bimetallic Cluster Electrocatalysts Boost CO_(2) Reduction

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Precision Chemistry 2024年第3期2卷 96-102页

作者： Depeng Wang Jiazhi Wang Zhi Wang Ning Zhang jianrong zeng Haixia Zhong Xinbo Zhang State Key Laboratory of Rare Earth Resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Supported metal clusters with the integrated advantages of single-atom catalysts and conventional nanoparticles held great promise in the electrocatalytic carbon dioxide reduction(ECO_(2)R)operated at low overpotential and high current ***,its precise synthesis and the understanding of synergisti-cally catalytic effects remain ***,we report a facile method to synthesize the bimetallic Cu and Ni clusters anchored on porous carbon(Cu/Ni-NC)and achieve an enhanced ECO_(2)*** aberration-corrected high-angle annular dark-field scanning transmission electron microscopy and synchrotron X-ray absorption spectroscopy were employed to verify the metal dispersion and the coordination of Cu/Ni clusters on *** a result of this route,the target Cu/Ni-NC exhibits excellent electrocatalytic performance including a stable 30 h electrolysis at 200 mA cm^(-2) with carbon monoxide Faradaic efficiency of∼95.1%using a membrane electrode assembly electrolysis *** with the in situ analysis of the surface-enhanced Fourier transform infrared spectroelectrochemistry,we propose that the synergistic effects between Ni and Cu can effectively promote the H_(2)O dissociation,thereby accelerate the hydrogenation of CO_(2)to*COOH and the overall reaction process.

关键词： electrocatalytic CO_(2)reduction bimetallic cluster synergistic catalysis membrane electrode assembly electrolysis cell in situ surface-enhanced infrared absorption spectroscopy

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Modeling the impact of the viaduct on particles dispersion from vehicle exhaust in street canyons

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Science China(Technological Sciences) 2012年第1期55卷 48-55页

作者： ZHANG ChuanFu WEN Mou zeng jianrong ZHANG GuiLin FANG HaiPing LI Yan Key Laboratory of Nuclear Analysis Technique Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China Shanghai Institute of Applied Mathematics and Mechanics Shanghai University Shanghai 200072 China

In this paper, the impact of the viaduct on flow and traffic exhausting particles dispersion within urban street canyons was numerically simulated using a computational fluid dynamics （CFD） model. Two-dimensional flow and dispersion of particles from traffic exhausts were modeled using the standard k-e turbulence model. The street canyons with a viaduct at different widths and different heights above the ground are simulated. The results show that the airflow in street canyon is evidently in- fluenced by the viaduct： The position of the main vortex center is changed, especially there are two strong vortexes when the viaduct is placed at 10 m height above the ground. It is found based on the study of the particles number concentrations （PNCs） that the viaduct may mitigate the pollution level in the street canyon sometimes. The impact of the viaduct width on PNCs is stronger than that of the height. The study of PNDs reveals that the mean PNCs at the wall of upwind building increase when a viaduct is placed in street canyon. In addition, it is found based on the study of mean particles residence time （PRT） that the removal of the particles strongly correlates to the mean PNCs. The results indicate that the viaduct is an important factor to influence the flow patterns and particles dispersion in street canyons.

关键词： street canyon viaduct particles number distribution CFD simulation mean particle residence time

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广藿香^(60)Co-γ射线辐射诱变植株的筛选及评价

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热带作物学报 2024年第2期45卷 278-287页

作者：巫锴丽刘键锺李成梅曾建荣庞玉新严寒静广东药科大学中药学院广东广州510006 深圳市宝安人民医院广东深圳518101 广东潮州卫生健康职业学院广东潮州515632 贵州中医药大学药学院贵州贵阳550025

为应对广藿香药材需求量急速增加、无突出优点的品种且品种单一的情况,解决广藿香道地药材缺失及种质退化、种质来源混乱、易遭受病害虫害等问题,本研究通过辐照诱变育种,设置梯度剂量的^(60)Co-γ射线,对愈伤组织、丛生芽、生根苗3种... 详细信息

为应对广藿香药材需求量急速增加、无突出优点的品种且品种单一的情况,解决广藿香道地药材缺失及种质退化、种质来源混乱、易遭受病害虫害等问题,本研究通过辐照诱变育种,设置梯度剂量的^(60)Co-γ射线,对愈伤组织、丛生芽、生根苗3种不同生长阶段的广藿香进行辐照处理,观测再生植株外观形态,筛选出变异植株,测量其农艺性状和生理生化指标,采用气相色谱-质谱联用技术(GC-MS)测定其主要挥发性成分广藿香酮及百秋李醇含量。结果表明:愈伤组织和丛生芽对^(60)Co-γ射线较为敏感,死亡率较高,生根苗对^(60)Co-γ射线较为耐受,死亡率较低,最佳诱变育种的方式是采用100Gy^(60)Co-γ射线辐照处理生根苗,其诱变率高达10%。本研究最终获得29株广藿香变异植株,分别为三叶轮生、异型叶、深裂叶、狭叶、卷叶、下卷叶和紫色叶7种形态类型植株,通过比较分析渗透调节物质(可溶性糖、可溶性蛋白和游离脯氨酸)、抗氧化物质(丙二醛、过氧化物酶、过氧化氢酶)、广藿香酮和百秋李醇含量,最终筛选得到15株具有潜力植株,分别为:抗逆且高有效成分植株SY7和ZY1;对环境敏感且高有效成分植株SY15、SY18和XY1;抗逆植株SY2、SY6、SY19、YY2、YY9和XJY1;高有效成分植株SY10和SY17;“酮型”广藿香植株SY3和JY1。其中SY7和ZY1为双重优良特性新种质,2株“酮型”广藿香植株对于解决道地药材缺失及其种质退化等问题具有应用价值。本研究采用^(60)Co-γ射线辐照诱变方法选育的广藿香变异植株,具有较强抗逆性、高有效成分等优点,为广藿香诱变育种以及新品种选育提供成熟方法和潜在种质。

关键词：广藿香 ^(60)Co-γ射线生理生化指标 GC-MS 百秋李醇广藿香酮

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Sulfur speciation and bioaccumulation in camphor tree leaves as atmospheric sulfur indicator analyzed by synchrotron radiation XRF and XANES

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Journal of Environmental Sciences 2013年第3期25卷 605-612页

作者： jianrong zeng Guilin Zhang Liangman Bao Shilei Long Mingguang Tan Yan Li Chenyan Ma Yidong Zhao Shanghai Institute of Applied Physics Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Synchrotron Radiation Laboratory Institute of High Energy PhysicsChinese Academy of Sciences

Analyzing and understanding the effects of ambient pollution on plants is getting more and more attention as a topic of environmental biology.A method based on synchrotron radiation X-ray fluorescence and X-ray absorption near edge structure spectroscopy was established to analyze the sulfur concentration and speciation in mature camphor tree leaves （CTLs）,which were sampled from 5 local fields in Shanghai,*** SO2 concentration,SO42-concentration in atmospheric particulate,SO42-and sulfur concentration in soil were also analyzed to explore the relationship between ambient sulfur sources and the sulfur nutrient cycling in *** sulfur concentration in mature camphor tree leaves was 766-1704 mg/*** mainly detected sulfur states and their corresponding compounds were ＋6 （sulfate,include inorganic sulfate and organic sulfate）,＋5.2 （sulfonate）,＋2.2 （suloxides）,＋0.6 （thiols and thiothers）,＋0.2 （organic sulfides）.Total sulfur concentration was strongly correlated with sulfate proportion with a linear correlation coefficient up to 0.977,which suggested that sulfur accumulated in CTLs as sulfate *** sulfur compounds （organic sulfides,thiols,thioethers,sulfoxide and sulfonate） assimilation was sufficed to meet the nutrient requirement for growth at a balanced level around 526 mg/*** sulfate accumulation mainly caused by atmospheric sulfur pollution such as SO2 and airborne sulfate particulate instead of soil *** urban to suburb place,sulfate in mature CTLs decreased as the atmospheric sulfur pollution reduced,but a dramatic increase presented near the seashore,where the marine sulfate emission and maritime activity pollution were *** sulfur concentration and speciation in mature CTLs effectively represented the long-term biological accumulation of atmospheric sulfur pollution in local environment.

关键词： synchrotron radiation X-ray fluorescence X-ray absorption near edge structure sulfur speciation sulfur bioaccumulation camphor tree leaves

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DR3TBDTT Based Ternary Blends Containing Conjugated Polymers： Crystallization Determines Morphology and Performance

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Chinese Journal of Chemistry 2018年第5期36卷 437-442页

作者： Jingping Yin Weihua Zhou Qingyun Ai Xiangchuan Meng Siqi Liu Zoukangning Yu jianrong zeng Yiwang Chen College of Chemistry Nanchang University 999 Xuefu Avenue Nanchang Jiangxi 330031 China School of Materials Science and Engineering Nanchang University 999 Xuefu Avenue Nanchang Jiangxi 330031 China Shanghai Synchrotron Radiation Facility (SSRF) Shanghai Institute of Applied Physics Chinese Academy of Sciences Shanghai 201800 China

How the conjugated polymers affect the crystallization of DR3TBDTT, in addition to the corresponding morphology and performance, is not well understood. In this work, the weakly crystalline polymer PTB7-Th and highly crystalline polymers of PCDTBT and P3HT were incorporated into DR3TBDTT：PC71BM system to investigate the variation of crystallization, morphology and performance. It is demonstrated that PTB7-Th is the most effective additive to improve the PCE value of DR3TBDTT：PC71BM to 5.7%, showing the nucleating agent reducing the crystallization correlation length （CCL） value of DR3TBDTT from 18.7 nm to 17.0 rim, in addition to the optimized morphology. In contrast, the PCDTBT and P3HT could induce the crystallization of DR3TBDTT, leading to much higher CCL value as well as obvious phase separation. Despite of energy level alignment, the crystallization of DR3TBDTT influenced by polymers determines the corresponding morphology of active layers and photovoltaic performance.

关键词： crystallization morphology ternary blends organic solar cells

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Pd–Ni–P metallic glass nanoparticles for nonenzymatic glucose sensing

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Progress in Natural Science:Materials International 2023年第2期33卷 244-249页

作者： Yu Lou Zhongzheng Yao Shu Fu Sinan Liu Xindong Zhu Wen Huang Min Dong jianrong zeng He Lin He Zhu Si Lan Herbert Gleiter Institute of Nanoscience School of Materials Science and Engineering Nanjing University of Science and Technology Shanghai Synchrotron Radiation Facility Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai Institute of Applied Physics Chinese Academy of Sciences Center for Neutron Scattering City University of Hong Kong Shenzhen Research Institute

Metallic glass nanoparticles hold great promise as nonenzymatic glucose sensors due to their rich low-coordinated active sites and high biocompatibility. However,their non-periodic atomic structure and unclear structure-property relationship pose significant challenges for realizing and optimizing their sensing performance. In this work, Pd–Ni–P metallic glass nanoparticles with variable compositions were successfully prepared as nonenzymatic glucose sensors via a laser-evaporated inertgas condensation method. The electrochemical tests show that the sensor based on Pd41.25Ni41.25P17.5nanoparticles shows a wide linear detection range(0.003–1.31m M), high sensitivity(516 μA m M-1cm-2), and high stability(～97.8% current retention after 1000 cycles). Local structural investigations using synchrotron pair distribution function and high-resolution microscopic techniques reveal a strong structural correlation within short-to medium-range orders in the Pd41.25Ni41.25P17.5nanoparticles, which can be well retained after electrochemical cycling. These atomic-scale structural characteristics might be responsible for the high sensing performance. This study demonstrates the high applicability of Pd–Ni–P metallic glass nanoparticles as sensitive and stable non-enzymatic glucose sensors.

关键词： Nanoparticles

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Characteristics of secondary inorganic aerosol and sulfate species in size-fractionated aerosol particles in Shanghai

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Journal of Environmental Sciences 2014年第5期26卷 1040-1051页

作者： Shilei Long jianrong zeng Yan Li Liangman Bao Lingling Cao Ke Liu Liang Xu Jun Lin Wei Liu Guanghua Wang Jian Yao Chenyan Ma Yidong Zhao Shanghai Institute of Applied Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Synchrotron Radiation Laboratory Institute of High Energy Physics Chinese Academy of Sciences

Sulfate, nitrate and ammonium （SNA） are the dominant species in secondary inorganic aerosol, and are considered an important factor in regional haze formation. Size-fractionated aerosol particles for a whole year were collected to study the size distribution of SNA as well as their chemical species in Shanghai. SNA mainly accumulated in fine particles and the highest average ratio of SNA to particulate matter （PM） was observed to be 47% in the fine size fraction （0.49-0.95 ~tm）. Higher sulfur oxidation ratio and nitrogen oxidation ratio values were observed in PM of fine size less than 0.95 ~tm. Ion balance calculations indicated that more secondary sulfate and nitrate would be generated in PM of fine size （0.49-0.95 p.m）. Sulfur K-edge X-ray absorption near-edge structure （XANES） spectra of typical samples were analyzed. Results revealed that sulfur mainly existed as sulfate with a proportion （atomic basis） more than 73% in all size of PM and even higher at 90% in fine particles. Sulfate mainly existed as （NH4）2SO4 and gypsum in PM of Shanghai. Compared to non-haze days, a dramatic increase of （NH4）2SO4 content was found in fine particles on haze days only, which suggested the promoting impact of （NH4）2SO4 on haze formation. According to the result of air mass backward trajectory analysis, more （NH4）2SO4 would be generated during the periods of air mass stagnation. Based on XANES, analysis of sulfate species in size-fractionated aerosol particles can be an effective way to evaluate the impact of sulfate aerosols on regional haze formation.

关键词： sulfate particulate matter XANES

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Mutual feedback between algal blooming and global warming

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Journal of Oceanology and Limnology 2024年第3期42卷 787-801页

作者： jianrong MA Guijun YANG Xianfu ZHAO Boqiang QIN Kun SHAN Botian ZHOU Yan zeng Jingfu WANG Jingan CHEN Chongqing Institute of Green and Intelligent Technology Chinese Academy of SciencesChongqing 400714China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China School of Environment and Ecology Jiangnan UniversityWuxi 214122China Key Laboratory of Ministry of Water Resources for Ecological Impacts of Hydraulic-projects and Restoration of Aquatic Ecosystem Institute of HydroecologyMinistry of Water Resources&Chinese Academy of SciencesWuhan 430079China State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China

Global warming and algal blooms have been two of the most pressing problems faced by the world *** recent decades,numerous studies indicated that global warming promoted the expansion of algal ***,research on how algal blooms respond to global warming is *** warming coupled with eutrophication promoted the rapid growth of phytoplankton,which resulted in an expansion of algal *** blooms are affected by the combined effects of global warming,including increases in temperatures,CO_(2)concentration,and nutrient input to aquatic systems by extreme weather *** the growth of phytoplankton requires CO_(2),they appear to act as a carbon ***,algal blooms will release CH4,CO_(2),and inorganic nitrogen when they die and *** substrate nitrogen increases from decompose algal biomass,more N2O will be released by nitrification and *** comparison to CO_(2),CH4has 28-fold and N2O has 265-fold greenhouse ***,algal blooms in the polar regions may contribute to melting glaciers and sea ice(will release greenhouse gas,which contribute to global warming)by reducing surface albedo,which consequently would accelerate global ***,algal blooms and global warming could form feedback loops which prevent human survival and *** researches shall examine the mechanism,trend,strength,and control strategies involved in this mutual ***,it will promote global projects of environmental protection combining governance greenhouse gas emissions and algal blooms,to form a geoengineering for regulating the cycles of carbon,nitrogen,and phosphorus.

关键词： climate change carbon neutrality eutrophication greenhouse gas glaciers melting geoengineering

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Effect of Ultrashort Pulsed Laser and X-Ray Irradiation on Au^+ -Doped Glass

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光学学报 2003年第S1期23卷 112-113页

作者： Huidan zeng, jianrong Qiu, Xiongwei Jiang, Congshan Zhu and Fuxi Gan(Photon Craft Project, Shanghai Institute of Optics and Fine Mechanics, CAS, P. R. China, Tel: 86-21 -59911897, Fax: 86-21-59929373, E-mail: zenghuidan@***) Photon Craft Project Shanghai Institute of Optics and Fine Mechanics CAS P. R. China

Au nanoparticles were precipitated inside Au+-doped glass samples after irradiation by femtosecond laser or x-ray. Femtosecond laser and X-ray irradiation result in decreasing of anneal temperature and critical size f... 详细信息

关键词： of as were Effect of Ultrashort Pulsed Laser and X-Ray Irradiation on Au Doped Glass into for Del on APPI

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