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Charge storage mechanism of MOF-derived Mn2O3 as high performance cathode of aqueous zinc-ion batteries

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Journal of Energy Chemistry 2021年第1期30卷 277-283,I0009页

作者： Min Mao Xingxing wu Yi Hu Qunhui Yuan Yan-bing He Feiyu Kang Tsinghua Shenzhen International Graduate School Division of Energy&EnvironmentTsinghua UniversityShenzhen 518055GuangdongChina Laboratory of Advanced Materials Department of Materials Science and EngineeringTsinghua UniversityBeijing 100084China State Key Laboratory of Advanced Welding and Joining and School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055GuangdongChina

Aqueous Zinc-ion batteries(ZIB) are attracting immense attention because of their merits of excellent safety and quite cheap properties compared with lithium-ion batteries(LIB).Manganese oxide is one of the most important cathode materials of *** this paper,α-Mn2O3 used as cathode of ZIB is synthesized via Metal-Organic Framework(MOF)-derived method,which delivers a high specific capacity of225 mAh g^(-1) at 0.05 A g^(-1) and 92.7 mAh g^(-1) after 1700 cycles at 2 A g^(-1).The charge storage mechanism of α-Mn2O3 cathode is found to greatly depend on the discharge current *** lower current density discharging,the H+ and Zn2+ are successively intercalated into the α-Mn2O3 before and after the "turning point" of discharge voltage and their discharging products present obviously different morphologies changing from flower-like to large plate-like *** a higher current density,the low-voltage plateau after the turning point disappears due to the decrease of amount of Zn2+ intercalation and the H+intercalation is dominated in α-Mn2 *** study provides significant understanding for future design and research of high-performance Mn-based cathodes of ZIB.

关键词： Zinc ion batteries α-Mn2O3 Metal-organic framework(MOF) Charge storage mechanism

Relationship between homocysteine level and prognosis of elderly patients with acute ischemic stroke treated by thrombolysis with recombinant tissue plasminogen activator

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World Journal of Clinical Cases 2019年第22期7卷 3751-3756页

作者： Juan Li Fan Zhou Feng-xue wu Department of General Practice Jingzhou Central HospitalJingzhou 434100Hubei ProvinceChina Department of Neurology Jingzhou Central HospitalJingzhou 434100Hubei ProvinceChina

BACKGROUND Acute ischemic stroke(AIS)is mainly caused by cerebral blood flow disorders,which further leads to ischemic brain necrosis or *** role of homocysteine(Hcy),an independent risk factor for cardiovascular disease,in the development of atherosclerosis is gradually ***,studies are still rare and little is known about the relationship of Hcy level with the *** To explore the relationship between Hcy level and prognosis in elderly patients with AIS after thrombolytic therapy with recombinant tissue plasminogen activator(rtPA).METHODS A total of 120 patients with acute ischemic stroke who were admitted to Jingzhou Central Hospital and underwent recombinant tissue plasminogen activator treatment were randomly selected from January 2017 to December *** were divided into two groups according to the level of Hcy,with 60 patients in each *** with Hcy≥18.54 umol/L were included into a high-level group and those with Hcy0.05).The Modified Rankin scale(MRS)scores were significantly higher in the high-level group than in the low-level group before and 1 h after the treatment(P0.05).NIHSS and MRS scores were positively correlated with the prognosis after thrombolytic therapy(P<0.05).CONCLUSION The level of Hcy is closely related to the prognosis of elderly patients with acute ischemic stroke,and after rtPA treatment,the prognosis of elderly patients is improved significantly.

关键词： Hcy level Acute ischemic stroke Thrombolytic therapy Prognosis

Author correction to “Tumor-microenvironment activated duplex genome-editing nanoprodrug for sensitized near-infrared titania phototherapy” [Acta Pharm Sin B (2022) 4224-4234]

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Acta Pharmaceutica Sinica B 2024年第2期14卷 897-899页

作者： Zekun Li Yongchun Pan Shiyu Du Yayao Li Chao Chen Hongxiu Song Yueyao wu Xiaowei Luan Qin Xu Xiaoxiang Guan Yujun Song Xin Han Jiangsu Key Laboratory for Pharmacology and Safety Evaluation of Chinese Materia Medica School of Medicine&Holistic Integrative MedicineJiangsu Joint International Research Laboratory of Chinese Medicine and Regenerative MedicineNanjing University of Chinese MedicineNanjing 210023China College of Engineering and Applied Sciences Jiangsu Key Laboratory of Artificial Functional MaterialsState Key Laboratory of Analytical Chemistry for Life ScienceNanjing UniversityNanjing 210023China Department of Oncology The First Affiliated Hospital of Nanjing Medical UniversityNanjing 210029China

The authors regret that there is an error in the article Fig.5E due to the mistake of copying and pasting in the process of assembling figures and negligence in the *** it does not affect the conclusion,it is an obvio... 详细信息

关键词： journal correction conclusion

基于投入产出模型的内蒙古水资源利用效益评价与分析

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水电能源科学 2024年第9期42卷 25-28页

作者：杨正杨武王炳亮何进宇李淑霞宁夏大学土木与水利工程学院宁夏银川750000 宁夏大学宁夏黄河水联网数字治水重点实验室宁夏银川750000 宁夏大学旱区现代农业水资源高效利用教育部工程研究中心宁夏银川750000 宁夏水文水资源监测预警中心宁夏银川750021

贯彻黄河流域生态保护与高质量发展战略、落实“四水四定”发展理念、合理进行区域水资源配置是当前我国水资源管理的重中之重。利用投入产出模型分别分析并对比了内蒙古2012、2017年各部门的用水效率、用水效益、部门关联性及部门间虚... 详细信息

贯彻黄河流域生态保护与高质量发展战略、落实“四水四定”发展理念、合理进行区域水资源配置是当前我国水资源管理的重中之重。利用投入产出模型分别分析并对比了内蒙古2012、2017年各部门的用水效率、用水效益、部门关联性及部门间虚拟水的转移量的实际状况。结果表明,各部门完全用水系数总体呈下降趋势;农业部门产出乘数最高为自治区基础产业;建筑业等工业部门的影响力系数不断增大,对其他部门经济拉动力不断增强,可见主导产业仍为工业;内蒙古虚拟水流向主要为农业到制造业和建筑业,制造业到其他行业,农业部门是最大的虚拟水净输出部门及虚拟水流出源头。研究成果可以分析“十三五”以来内蒙古节水型社会建设成效以及为“十四五”以后水资源配置利用规划提供参考依据。

关键词：水资源投入产出模型水资源经济效益内蒙古

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影响呼伦贝尔草原土壤有机碳空间变异的主导因素

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中国农业科学 2024年第12期57卷 2378-2389页

作者：薛玮徐丽君聂莹莹吴欣珈严翊丹叶立明柳新伟青岛农业大学资源与环境学院北方干旱半干旱耕地高效利用全国重点实验室/内蒙古呼伦贝尔草原生态系统国家野外科学观测研究站/中国农业科学院农业资源与农业区划研究所根特大学地质系

【背景】土壤有机碳（SOC）是草地生态系统全球碳循环中的关键组成部分。在气候变化和草地土壤退化的背景下，草地碳循环的研究引起了广泛的关注，特别是对草地SOC在不同时间和空间尺度上的动态和驱动因素的深入分析。然而，对草地SOC... 详细信息

【背景】土壤有机碳（SOC）是草地生态系统全球碳循环中的关键组成部分。在气候变化和草地土壤退化的背景下，草地碳循环的研究引起了广泛的关注，特别是对草地SOC在不同时间和空间尺度上的动态和驱动因素的深入分析。然而，对草地SOC长期动态变化的估计和空间变异驱动因子分析目前主要基于遥感建模方法和模拟预测，而非直接测量。【目的】评估呼伦贝尔草原不同时期SOC空间变异因子的相对重要性及其变化特征。【方法】基于1980年全国第二次土壤调查数据，在2022年重复了呼伦贝尔草原第二次土壤调查的31个样点的土壤剖面，并通过建立多元线性模型和广义相加模型对这两个时期SOC变化及其驱动因子进行量化分析。【结果】1980—2022年，40年间呼伦贝尔草原SOC由17.25 g·kg-1增加到17.62 g·kg-1，增加了0.37 g·kg-1。气候因子的相对重要性从1980年的22.1%增加到2022年的72.9%。相比之下，地形和利用强度因子的相对重要性下降，分别从1980年的38.8%和39.2%下降到2022年的13.5%和13.5%。【结论】气候因子、地形和利用强度共同主导了呼伦贝尔草原土壤有机碳的空间变异。在过去的40多年里，影响草地SOC变化的气候因子已由次要贡献因素演变为主要控制因素。

关键词：有机碳空间变异回归模型气候地形驱动因子呼伦贝尔草原

活性碳负载纳米金属氧化物对AP热分解的催化性能

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火炸药学报 2024年第5期47卷 475-484,I0006页

作者：石小兵谢五喜李洋黄海涛胥会祥李勇宏曾丽媛庞维强西安近代化学研究所陕西西安710065

采用水热法制备了两种纳米金属氧化物(纳米CuO和纳米Fe_(2)O_(3)颗粒),将纳米CuO和纳米Fe_(2)O_(3)负载在活性碳上,制备成CuO@C、Fe_(2)O_(3)@C复合材料,并将其作为催化剂与高氯酸铵(AP)混合制备成混合物样品AP/CuO、AP/CuO@C、AP/Fe_(2... 详细信息

采用水热法制备了两种纳米金属氧化物(纳米CuO和纳米Fe_(2)O_(3)颗粒),将纳米CuO和纳米Fe_(2)O_(3)负载在活性碳上,制备成CuO@C、Fe_(2)O_(3)@C复合材料,并将其作为催化剂与高氯酸铵(AP)混合制备成混合物样品AP/CuO、AP/CuO@C、AP/Fe_(2)O_(3)、AP/Fe_(2)O_(3)@C;通过扫描电子显微镜(SEM)、差示扫描量热仪(DSC)、热重-微分热重分析(TG-DTG)和热重-红外光谱(TG-FTIR)联用等技术研究了4种催化剂对AP热分解的催化机理及分解动力学特性。结果表明,4种催化剂均将AP的两步分解反应催化为单放热峰,在5 K/min升温速率下,AP的分解峰温较纯AP分别提前90.1、73.4、65.4和69℃;AP/CuO@C分解主要气相产物有HCl、CO_(2)、N_(2)O、HNO_(3)和NO_(2),其中NO_(2)含量最高;AP/Fe_(2)O_(3)@C分解主要气相产物中CO_(2)含量显著提升,NO_(2)含量稍有降低。

关键词：物理化学水热法催化性能 AP 分解动力学气相产物金属氧化物活性炭燃烧催化剂

Burden of six major types of digestive system cancers globally and in China

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中华医学杂志(英文版) 2024年第16期137卷 1957-1964页

作者： Zhou Yueyang Song Kai Chen Yuqing Zhang Yuelun Dai Min wu Dong Chen Hongda Center for Prevention and Early Intervention National Infrastructures for Translational Medicine Institute of Clinical Medicine Peking Union Medical College Hospital Chinese Academy of Medical Science and Peking Union Medical College Beijing China Department of Gastroenterology Peking Union Medical College Hospital Chinese Academy of Medical Science and Peking Union Medical College Beijing China Department of Cancer Epidemiology National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing China Department of Gastroenterology People’s Hospital of Xizang Autonomous Region Lhasa Xizang autonomous region China

Background: Digestive system cancers constitute a significant number of cancer cases, but their burden is not uniform. As Global Cancer Observatory (GLOBOCAN) 2022 has recently updated its estimates of cancer burden, we aimed to investigate the burden of six major digestive system cancers both worldwide and in China, along with geographical and temporal variations in cancer-specific incidence and ***: We extracted data on primary cancers of the esophagus, stomach, colorectum, liver, pancreas, and gallbladder from the GLOBOCAN database for 2022. Age-standardized incidence and mortality rates were calculated and stratified by sex, country, region, and human development index (HDI). We used the 2022 revision of the World Population Prospects (United Nations) to obtain demographic data for various age groups in China from 1988 to 2012 and used the joinpoint model and the average annual percentage change (AAPC) to analyze cancer incidence trends in ***: In 2022, the estimated global incidence of digestive system cancers reached 4,905,882, with an estimated 3,324,774 cancer-related deaths. Colorectal cancer was most prevalent in terms of incidence and mortality. There was a significant correlation between the burden of gastrointestinal cancers and country HDI. From 1988 to 2012, the incidence of esophageal, gastric, and liver cancers declined in China, whereas colorectal and pancreatic cancer incidences continued to increase. By 2050, colorectal and liver cancers are projected to remain the leading cancer types in China in terms of incidence and mortality, ***: Digestive system cancers remain a significant public health challenge globally and in China. Although progress has been made in the prevention and control of some cancers, the burden of digestive system cancers persists. The implementation of tertiary prevention strategies must be intensified to reduce the incidence and mortality of digestive system cancers, mitigating t

关键词： Digestive system cancer Incidence Mortality GLOBOCAN 2022 China Global Esophagus cancer Stomach cancer Colorectal cancer

粗骨料纤维充填体的力学特性与能量损伤演变规律

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中国有色金属学报 2024年第7期34卷 2476-2490页

作者：薛希龙孙鹏程武拴军张晓龙卫国张元坤李佳乐顾元统胡瑞宁南华大学资源环境与安全工程学院衡阳421200 金川集团股份有限公司龙首矿金昌737100 镍钴共伴生资源开发与综合利用全国重点实验室金昌737100 中核韶关锦原铀业有限公司韶关512300

为提升充填体的抗拉性能、抗裂性能和韧性,通过抗压、巴西劈裂和落锤冲击试验研究了聚丙烯纤维对充填体强度特征、变形特征、抗冲击性能和能量演变的影响。结果表明:随着纤维掺量增加,充填体强度先增大后减小,弹性模量逐渐降低;掺入纤维... 详细信息

为提升充填体的抗拉性能、抗裂性能和韧性,通过抗压、巴西劈裂和落锤冲击试验研究了聚丙烯纤维对充填体强度特征、变形特征、抗冲击性能和能量演变的影响。结果表明:随着纤维掺量增加,充填体强度先增大后减小,弹性模量逐渐降低;掺入纤维后,充填体总耗能增加,达到峰值后释放动能减小,摩擦内能增加,可促进弹性应变能转变为耗散应变能;随着纤维掺量增加,充填体冲击耗能、延性比和韧性系数先增大后减小,终裂形态由“开裂即碎”演变为“裂而不碎”;掺入0.10%纤维的充填体抗拉强度、韧性和抗冲击等性能最优。强化机制主要是充填体内纤维“筋网结构”延缓裂纹产生、抑制裂纹扩展和提升能量吸收上限。研究成果有助于提升采场充填体顶板的稳定性,保障矿山生产作业安全。

关键词：混合粗骨料充填体纤维强度能量耗散落锤冲击试验

水滑石衍生CuMgFe-LDO催化剂协同净化氮氧化物和甲醇

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化工学报 2024年第5期75卷 1890-1902页

作者：徐欣欣冀芸丽武鲜凤安霞吴旭太原理工大学化学学院山西太原030024

NH_(3)-SCR催化剂同时去除NO_(x)和挥发性有机物(VOCs)引起了人们的广泛关注,然而,VOCs的存在会对脱硝反应产生负面影响,尤其在低温条件下。本研究选定水滑石衍生复合氧化物(Cu)MgFe-LDO催化剂探索协同脱除NO_(x)和甲醇性能,着重考察Cu... 详细信息

NH_(3)-SCR催化剂同时去除NO_(x)和挥发性有机物(VOCs)引起了人们的广泛关注,然而,VOCs的存在会对脱硝反应产生负面影响,尤其在低温条件下。本研究选定水滑石衍生复合氧化物(Cu)MgFe-LDO催化剂探索协同脱除NO_(x)和甲醇性能,着重考察Cu的引入以及CuO_(x)和FeO_(x)相互作用对协同反应的影响,并对所制备的催化剂进行表征测试。结果表明,含Cu催化剂的脱硝活性均高于MgFe-LDO催化剂,最佳催化剂Cu_(0.5)MgFe-LDO在230~300℃温窗内具有较好的脱硝活性和甲醇氧化性能。适量引入Cu加强了Cu、Fe物种间的相互作用,有利于氧化还原循环,从而产生更多的氧缺陷及活性氧,过量Cu掺杂会破坏催化剂结构,降低表面酸性,引入Cu可以减缓甲醇对SCR反应的抑制作用。这些结果可为实际应用SCR催化剂协同去除VOCs提供指导。

关键词：类水滑石 CuMgFe-LDO 甲醇氧化 NH3-SCR 协同脱除