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Spray pyrolysis-derived W-doped MoSe_(2)/rGO paper-like microspheres:optimization of microstructure and mesostructure for enhanced lithium storage

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Rare Metals 2024年第7期43卷 3019-3031页

作者： Wei Wang Jun-Yu chen Jie Ouyang Hong Yin ao-Jie Li Liang chen Jun-Lin Huang Yu-can Zhu Gang-Yong Li Zhao-Hui Hou Key Laboratory of Hunan Province for Advanced carbon-based Functional Materials Hunan Institute of Science and TechnologyYueyang 414006China School of chemistry and chemical Engineering Hunan Institute of Science and TechnologyYueyang414006China Hunan Province Key Laboratory of Materials Surface&Interface Science and Technology Material Science and Engineering SchoolCentral South University of Forestry and TechnologyChangsha 410004China International Iberian Nanotechnology Laboratory(INL) AvMestre Jose Veiga4715-330 BragaPortuga

Two-dimensional MoSe_(2) is a promising candidate for lithium-ion battery ***,its conductivity and lithium storage volumetric effect still need to be *** this work,W-doped MoSe_(2)/rGO paper-like microspheres are successfully prepared through ultrasonic spray pyrolysis,achieving optimization at both the microstructure and mesostructure to enhance the lithium storage performance of the ***,by utilizing the similar two-dimensional structure between MoSe_(2) and rGO,self-assembly is achieved through spray pyrolysis,resulting in a well-defined van der Waals heterostructure at the interface on the microscale,enhancing the electron and ion transfer capability of the ***,the mesoscale paper-like microsphere morphology provides additional volume expansion buffering ***,W-doping not only increases the interlayer spacing of MoSe_(2)(0.73 nm),thereby reducing the diffusion resistance of Li+,but also allow for the modulation of the energy band structure of the *** functional theory(DFT)calculations confirm that W-doped MoSe_(2)/rGO exhibits the narrowest bandgap(0.892 eV).Therefore,the composite demonstrates excellent lithium storage performance,maintaining a specific capacity of 732.9 mAh·g^(-1)after 300 cycles at a current density of 1 A·g^(-1).

关键词： Molybdenum selenide Heterostructure Microspheres Li-ion batteries Kinetics

A synthesis of the cretaceous wildfire record related to atmospheric oxygen levels?

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Journal of Palaeogeography 2024年第1期13卷 149-164页

作者： Da-Wei Lü Wen-xu Du Zhi-Hui Zhang Yuan Gao Tian-Tian Wang Jin-cheng xu ao-cong Zhang cheng-Shan Wang Shandong Provincial Key Laboratory of Depositional Mineralization and Sedimentary Minerals College of Earth Sciences and EngineeringShandong University of Science and TechnologyQingdao 266590Shandong ProvinceChina School of Earth Sciences and Resources China University of GeosciencesBejing 100083China Institute of Earth Sciences China University of Geosciences(Bejing)Beijing 100083China

The cretaceous was a significant greenhouse period in Earth's history with higher atmospheric cO_(2) levels and temperatures than today. Although evidence of combustion has been widely described from the cretaceous deposits, our understanding of the spatiotemporal diversification pattern and process of the cretaceous wildfires is still limited. In this study, we comprehensively synthesize a total of 271 published cretaceous wildfire occurrences based on the by-products of burning, including fossil charcoal, pyrogenic inertinite(fossil charcoal in coal), and pyrogenic polycyclic aromatic hydrocarbons(PAHs). Spatially, the dataset shows a distinctive distribution of reported wildfire evidence characterized by high concentration in the middle latitudinal areas of the Northern Hemisphere(30°N-60°N) over the cretaceous. Temporally, an overall increasing trend of the reported wildfire data from the Early cretaceous to the Late cretaceous is coincident with higher atmospheric O_(2) levels. However, the spatial and temporal patterns may result from many types of factors, such as taphonomy, preservation, and researcher biases, instead of a real picture of the cretaceous wildfire evolution. To better understand the spatiotemporal diversification of the cretaceous wildfire, more investigations on the record of wildfire occurrences during this period would be necessary in the future.

关键词： Wildfire cretaceous Atmospheric oxygen Taphonomy charcoal

Preparation of yttrium oxide coating with enhanced thermal shock resistance on refractories used for titanium alloy melting and casting

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Journal of Iron and Steel Research International 2024年第6期31卷 1411-1422页

作者： ao chen Yan Ma Zhou-fu Wang Hao Liu xi-tang Wang Sen-na chen chen-xin Zhang Zi-yi Tang Wei-dong Fu Wei cheng The State Key Laboratory of Refractories and Metallurgy Wuhan University of Science and TechnologyWuhan 430081HubeiChina xiangyang Juli High Technology Material co. Ltd.Xiangyang 441705HubeiChina xiangyang Public Inspection and Testing center Xiangyang 441000HubeiChina

In order to enhance the service life of refractories for melting and casting of titanium alloy,preparation of yttrium oxide coatings on the refractories surface is an effective *** improvement of thermal shock stability of the coating is beneficial to its spalling resistance during the high-temperature service,and the available slurry with good performance is the *** effects of the varieties and contents of dispersant(sodium tripolyphosphate,sodium hexametaphosphate,sodium pyrophosphate,citric acid and polycarboxylate ammonium salt)and binder(aluminum dihydrogen phosphate,zirconium acetate and yttria sol)on the stability,rheological and thixotropic properties of yttrium oxide waterbased slurry were investigated,and the effects of slurry composition design on the thermal shock resistance of the coating were *** results showed that the introduction of polycarboxylate ammonium salt as dispersant significantly improved the stability of the slurry,and the varieties of the binders had significant effects on the dispersibility of the *** aluminum dihydrogen phosphate and polycarboxylate ammonium salt were used as binder and dispersant,respectively,the slurry had better stability,suitable rheological and thixotropic *** using aluminum dihydrogen phosphate as binder,the coating had good thermal shock resistance and no obvious cracks were observed for the coating after thermal shock,which was attributed to the yttrium aluminate binding phase generated in the *** effective method was provided for preparing yttrium oxide coatings with enhanced thermal shock resistance applied in the process of titanium alloy melting and casting.

关键词： Yttrium oxide-Slurry Stability Rheological property Thixotropic property-coating Thermal shock resistance

Sport medicine among the past three decades in china

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chinese Medical Journal 2024年第7期137卷 757-761页

作者： Yingfang ao Wenqiang Yan Yue Wu Institute of Sports Medicine of Peking University Beijing 100191China Beijing Key Laboratory of Sports Injuries Beijing 100191China

In 1955,Professor Mianyu Qu,the founder of chinese sports medicine,and the older generation of sports medicine practitioners,founded china’s sports medicine in response to the needs of the development of national sports and *** therst 30 years of the establishment of sports medicine,they played an important role in the academic development,talent cultivation,international communication,construction of the society and organization,national Olympic glory,and national*** contributions established a solid foundation for the rapid development of china’s sports medicine in the following 30 years.

关键词： sports academic medicine

Building stabilized cu_(0.17)Mn_(0.03)V_(2)O_(5−□)·2.16H_(2)O cathode enables an outstanding room‐/low‐temperature aqueous Zn‐ion batteries

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carbon Energy 2024年第8期6卷 25-35页

作者： ao Wang Dai‐Huo Liu Lin Yang Fang xu Dan Luo Haozhen Dou mengqin Song chunyan xu Beinuo Zhang Jialin Zheng Zhongwei chen Zhengyu Bai Key Laboratory of Green chemical Media and Reactions Ministry of EducationCollaborative Innovation Center of Henan Province for Green Manufacturing of Fine ChemicalsSchool of Chemistry and Chemical EngineeringHenan Normal UniversityXinxiangHenanChina The State Key Laboratory of catalysis(SKLc) Power Battery and System Research CenterDalian Institute of Chemical PhysicsChinese Academy of SciencesDalianChina

Vanadium oxide cathode materials with stable crystal structure and fast Zn^(2+)storage capabilities are extremely important to achieving outstanding electrochemical performance in aqueous zinc‐ion *** this work,a one‐step hydrothermal method was used to manipulate the bimetallic ion intercalation into the interlayer of vanadium *** pre‐intercalated cu ions act as pillars to pin the vanadium oxide(V‐O)layers,establishing stabilized two‐dimensional channels for fast Zn^(2+)*** occupation of Mn ions between V‐O interlayer further expands the layer spacing and increases the concentration of oxygen defects(Od),which boosts the Zn^(2+)diffusion *** a result,as‐prepared cu_(0.17)Mn_(0.03)V_(2)O_(5−□)·2.16H_(2)O cathode shows outstanding Zn‐storage capabilities under room‐and lowtemperature environments(e.g.,440.3 mAh g^(−1)at room temperature and 294.3 mAh g^(−1)at−60°c).Importantly,it shows a long cycling life and high capacity retention of 93.4%over 2500 cycles at 2 A g^(−1)at−60°***,the reversible intercalation chemistry mechanisms during discharging/charging processes were revealed via operando x‐ray powder diffraction and ex situ Raman *** strategy of a couple of 3d transition metal doping provides a solution for the development of superior room‐/lowtemperature vanadium‐based cathode materials.

关键词： aqueous zinc‐ion batteries cu_(0.17)Mn_(0.03)V_(2)O_(5−□)·2.16H_(2)O oxygen defects room‐/lowtemperature performance stabilized nanostructure

Electrolytes additives for Zn metal anodes: regulation mechanism and current perspectives

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Rare Metals 2024年第9期43卷 4162-4197页

作者： Yu-Zhe Zhang Huai-Sheng ao Qi Dong Shao-Jie Zhang Zhi-Guo Hou Na-Na Wang xue-Song xie Jian Rong Zhong-Yu Li School of Environmental Science and Engineering Changzhou University School of Petrochemical Engineering Changzhou University Hefei National Laboratory for Physical Science at Microscale School of Chemistry and Materials Science University of Science and Technology of China Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials Innovation Campus University of Wollongong Department of chemical and Materials Engineering University of Alberta

With distinct advantages such as high gravimetric and volumetric capacity(5855 mAh·cm-3and 820mAh·g-1), low redox potential(-0.762 V vs. standard hydrogen electrode（SHE）), high abundance, low toxicity and intrinsic safety of Zn metal anode, Zn-ion batteries have become a potential alternative to Li-ion ***, several challenges still need to be addressed prior to the practical applications of Zn-ion batteries, such as dendrite growth during Zn plating/stripping and interfacial side reactions on the Zn surface. Such issues can be addressed by introducing additives to regulate the components and structures of the electrolyte. In this review, we systematically discussed the core issues of metallic Zn anodes and comprehensively summarized a novel perspective of the regulation mechanism of inhibiting dendrite growth or interfacial side reactions in Zn anodes by introducing additives into aqueous ***, some discussions and prospects for aqueous Zn ion batteries（AZIBs） are presented for future research.

关键词： AZIBs current perspectives Electrolyte additives Regulation mechanism Zn metal anode

A rapid assessment of MWRI-RM/FY3G brightness temperature

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Atmospheric and Oceanic Science Letters 2024年第3期17卷 42-46页

作者： Wenying He xinran xia Shengli Wu Peng Zhang Hongbin chen xiang'ao xia Yuquan Zhou Miao cai LAGEO Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina School of Hydrology and Water Resources Nanjing University of Information Science&TechnologyNanjingChina National Satellite Meteorological centure Chinese Meteorological AdministrationBeijingChina college of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijingChina Key Laboratory of cloud-Precipitation Physics and Weather Modification CMABeijingChina

2023年4月发射的FY-3G上搭载17个频率的测雨微波成像仪(MWRI-RM),其业务定标的微波亮温(Tb)数据于2023年10月23日公开发布.本文比对了发布10天的MWRI-RM与全球降水测量(GPM)卫星上的微波成像仪(GMI)相匹配的Tb数据,并借助辐射传输模式... 详细信息

2023年4月发射的FY-3G上搭载17个频率的测雨微波成像仪(MWRI-RM),其业务定标的微波亮温(Tb)数据于2023年10月23日公开发布.本文比对了发布10天的MWRI-RM与全球降水测量(GPM)卫星上的微波成像仪(GMI)相匹配的Tb数据,并借助辐射传输模式进行双差分(DD)交叉定标分析,旨在快速评估新一代MWRI-RM观测数据质量.观测比较表明,MWR1-RM与GMI测量的Tb一致性很好,大多通道的平均偏差(MBE)和均方根误差(RMSE)均小于1K.两种传感器由于观测角度略有不同在水面产生约0.5 K差异.DD分析也展示出MWRI-RM的大多数通道性能与GMI相当接近,尤其是首次启用的高频166 GHz和183 GHz.

关键词： FY3G MWRI-RM GMI 亮度温度双差分方法

Influence of extraction voltage on electron and ion behavior characteristics

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chinese Physics B 2024年第4期33卷 553-559页

作者：徐翱甘娉娉石元杰陈磊 Institute of Electronic Engineering China Academy of Engineering PhysicsMianyang 621999China

The characteristics of the extracted ion current have a significant impact on the design and testing of ion source *** this paper,a 2D in space and 3D in velocity space particle in cell(2D3V PIc)method is utilized to simulate plasma motion and ion extraction characteristics under various initial plasma velocity distributions and extraction voltages in a cartesian coordinate *** plasma density is of the order of 10^(15)m^(-3)-10^(16)m^(-3)and the extraction voltage is of the order of 100 V-1000 *** study investigates the impact of various extraction voltages on the velocity and density distributions of electrons and positive ions,and analyzes the influence of different initial plasma velocity distributions on the extraction *** simulation results reveal that the main reason for the variation of extraction current is the spacecharge force formed by the relative aggregation of positive and negative net *** lays the foundation for a deeper understanding of extraction beam characteristics.

关键词： extraction voltage plasma ion beam ion current

High patatin like phospholipase domain containing 8 expression as a biomarker for poor prognosis of colorectal cancer

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World Journal of Gastrointestinal Oncology 2024年第3期16卷 787-797页

作者： Peng-Yang Zhou De-xiang Zhu Yi-Jiao chen Qing-Yang Feng Yi-Hao Mao ao-Bo Zhuang Jian-Min xu Department of General Surgery Zhongshan Hospital Fudan UniversityShanghai 200032China

BAcKGROUND Patatin like phospholipase domain containing 8(PNPLA8)has been shown to play a significant role in various cancer *** studies have focused on its roles as an antioxidant and in lipid ***,the role of PNPLA8 in colorectal cancer(cRc)progression is *** To explore the prognostic effects of PNPLA8 expression in *** A retrospective cohort containing 751 consecutive cRc patients was ***8 expression in tumor samples was evaluated by immunohistochemistry staining and semi-quantitated with immunoreactive *** patients were divided into high and low PNPLA8 expression groups based on the cut-off va-lues,which were calculated by x-tile *** prognostic value of PNPLA8 was identified using univariate and multivariate cox regression *** over-all survival(OS)rates of cRc patients in the study cohort were compared with Kaplan-Meier analysis and Log-rank *** PNPLA8 expression was significantly associated with distant metastases in our cohort(P=0.048).cRc patients with high PNPLA8 expression indicated poor OS(median OS=35.3,P=0.005).cRc patients with a higher PNPLA8 expression at either stage I and II or stage III and IV had statistically significant shorter *** patients with left-sided colon and rectal cancer,the survival curves of two PN-PLA8-expression groups showed statistically significant *** analysis also confirmed that high PNPLA8 expression was an independent prog-nostic factor for overall survival(hazard ratio HR=1.328,95%cI:1.016-1.734,P=0.038).

关键词： Biomarker colorectal cancer Expression level Overall survival Patatin like phospholipase domain containing 8 Prognosis