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Multiple structural defects in ultrathin NiFe-LDH nanosheets synergistically and remarkably boost water oxidation reaction

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Nano Research 2022年第1期15卷 310-316页

作者： Zhongyin Zhao Qi Shao jiangyan xue Bolong Huang Zheng Niu Hongwei Gu Xiaoqing Huang Jianping Lang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic UniversityHung HornKowloonHong Kong SARChina

Modifying electrocatalysts nanostructures and tuning their electronic properties through defects-oriented synthetic strategies are:essential to improve the oxygen evolution reaction(OER)performance of electrocatalysts.Current synthetic strategies about.electrocatalysts mainly target the single or double structural defects,while the researches about the synergistic effect of multiple'structural defects are rare.In this work,the ultrathin NiFe layered double hydroxide nanosheets with a holey structure,oxygen;vacancies and Ni^(3+)defects on nickel foam(NiFe-LDH-NSs/NF)are prepared by employing a simple and green H202-assisted etching 1 method.The synergistic effect ofthe above three defects leads to the exposure of.more active sites and significant improvement of:the intrinsic activity.The optimized catalyst exhibits an excellent OER performance with an extraordinarily low overpotential of 170 mV;at to mA·cm^(-2) and a small Tafel slope of 39.3 mV·dec^(-1) in 1 M KOH solution.Density functional theory calculations reveal this OER;performance arises from pseudo re-oxidized metal-stable Ni^(3+)near oxygen vacancies(O_(vac)),which suppresses 3d-e_(g) of Ni-site and!elevates d-band center towards the competitively low electron-transferbarrier.This work provides a new insight to fabricate advanced electrocatalysts for renewable energy conversion technologies.

关键词： layered double hydroxide holey structures oxygen vacancies Ni3+defects oxygen evolution reaction

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One-pot pyrolysis synthesis of highly active Ru/RuOx nanoclusters for water splitting

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Nano Research 2022年第2期15卷 1020-1026页

作者： Fengyuan Zhu jiangyan xue Lingjian Zeng Jingrui Shang Shuanglong Lu xueqin Cao Brendan F.Abrahams Hongwei Gu Jianping Lang College of Chemistry Chemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China School of Chemical and Material Engineering Jiangnan UniversityWuxi 214122China School of Chemistry University of MelbourneVictoria 3010Australia

Using simple methods to obtain efficient catalysts has been a long-standing goal for researchers.In this work,the employment of a one-pot pyrolysis reaction to achieve molecular confinement,has led to the preparation of ruthenium(Ru)-based nanoclusters in a carbon matrix.A unique feature of the synthetic approach employed is that solvent and substrates were calcined together.As solvent evaporates,during calcination,the substrates form a dense solid which has the effect of limiting the aggregation of Ru centers during the carbonization process.The catalyst prepared in this simple manner showed an impressively high activity with respect to the hydrogen/oxygen evolution reaction(HER/OER).The Ru nanoclusters(Ru NCs),as the hydrogen evolution reaction(HER)catalysts,require ultralow overpotentials of 5 mV and 5.1 mV at-10 mA·cm^(-2) in 1.0 M KOH,and 0.5 M H_(2)SO_(4),respectively.Furthermore,the catalyst prepared by the one-pot method has higher crystallinity,a higher Ru content and an ultrafine cluster size,which contributes to its exceptional electrochemical performance.Meanwhile,the RuO_(x) nanoclusters(RuO_(x) NCs),obtained by oxidizing the aforementioned Ru NCs,exhibited good oxygen evolution reaction(OER)performance with an overpotential of 266 mV at 10 mA·cm^(-2).When applied to overall water splitting,Ru/RuO_(x) nanoclusters as the cathode and anode catalysts can reach 10 mA·cm^(-2) at cell voltages of only 1.49 V in 1 M KOH.

关键词： pyrolysis ruthenium nanoclusters ruthenium dioxide nanoclusters hydrogen evolution reaction oxygen evolution reaction overall water splitting

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Contribution of the Chinese Meridian Project to space environment research:Highlights and perspectives

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Science China Earth Sciences 2023年第7期66卷 1423-1438页

作者： Chi WANG Jiyao XU Libo LIU Xianghui xue Qinghe ZHANG Yongqiang HAO Gang CHEN Hui LI Guozhu LI Bingxian LUO Yajun ZHU jiangyan WANG State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China School of Earth and Space Sciences University Science and Technology of ChinaHefei 230026China Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China School of Earth and Space Sciences Peking UniversityBeijing 100191China Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072China Key Laboratory of Science and Technology on Environmental Space Situation Awareness National Space Science CenterChinese Academy of SciencesBeijing 100190China

The Chinese Meridian Project(CMP)is devoted to establishing a comprehensive ground-based monitoring network for China’s space weather research.CMP is a major national science and technology infrastructure project with the participation of more than 10 research institutions and universities led by the National Space Science Center of the Chinese Academy of Sciences.CMP is planned to be constructed in two phases:CMP phasesⅠandⅡ.The first phase(CMP-Ⅰ)started construction in2008 and completed in 2012,after which it entered the operation stage.The 10-year observation of CMP-Ⅰhas made significant scientific discoveries and achievements in the research fields of the middle and upper atmospheric fluctuations,metal layers in the mesosphere and lower thermosphere,ionospheric disturbances and irregularities,geomagnetic disturbances,and influences of solar activity.The review summarizes the main observations and research achievements,space weather forecast modeling and methods based on CMP-Ⅰover the past 10 years,and presents a future extension perspective along with the construction of CMP-Ⅱ.

关键词： Chinese Meridian Project Ground-based observation network Space weather Solar-terrestrial physics

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Construction Progress of Chinese Meridian Project PhaseⅡ

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空间科学学报 2022年第4期42卷 539-545页

作者： WANG Chi XU Jiyao LÜDaren YUE Xinan xue Xianghui CHEN Gang YAN Jingye YAN Yihua LAN Ailan WANG jiangyan WANG Xin TIAN Yufang State Key Laboratory of Space Weather National Space Science CenterChinese Academy of SciencesBeijing 100190 LAGEO Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029 Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100191 School of Earth and Space Sciences University Science and Technology of ChinaHefei 230026 Department of Space Physics School of Electronic InformationWuhan UniversityWuhan 430072

The Chinese Meridian Project(CMP)is the Space Environment Ground Based Comprehensive Monitoring Network of China,a national major science and technology infrastructure project.The CMP consists of the Space Environment Monitoring System,Data Communication System,and Science Application System.Its construction has been divided into two steps:the PhaseⅠwas from 2008 to 2012;the PhaseⅡstarted at the end of 2019,expected to be completed at the end of 2023.Beyond 2023,the CMP as a whole will be in operation to make observations.This report introduces the construction progress of CMP PhaseⅡin the past two years,covering the construction progress of both the Data Communication System and the Science Application System.As for the Space Environment Monitoring System,this report mainly gives an introduction to the construction progress of large-scale advanced monitoring equipment,such as,the solar radio telescope,interplanetary scintillation telescope,incoherent scatter radar,high frequency radar,MST radar,and large-aperture Helium Lidar.In addition,this paper presents the construction plan for the next two years and the future outlook as well.

关键词： Chinese Meridian Project(CMP) Ground-based observation network Space weather Solar-terrestrial physics

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Transparent perovskite glass-ceramics for visual optical thermometry

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Journal of Rare Earths 2021年第6期39卷 712-717,I0004页

作者： Qihua Yang Lei Zhao Zhaohui Fang Ze Yang jiangyan Cao Yiyu Cai Dacheng Zhou xue Yu Jianbei Qiu Xuhui Xu Faculty of Materials Science and Engineering Kunming University of Science and TechnologyKunming 650093China School of Physics and Opto-Electronic Technology Baoji University of Arts and SciencesBaoji 721016China Key Laboratory of Advanced Materials of Yunnan Province Kunming 650093China

Optical thermometers have aroused considerable attention in recent years,and the increasing demand of sensitivity for practical application encourages the investigation on developing innovative non-contact optical thermo metric materials with higher sensitivity and accuracy.Perovskite quantum dots(QDs)with excellent temperature-dependence optical properties,provide a feasible approach to realizing the detection of temperature change,however,their poor high temperature thermal stability and the facile realization to obtain the production remain a daunting challenge.Herein,growing Tb^(3+)-doped CsPbl_(3) QDs in situ in borosilicate glass is proposed,which ensures the phase stability,and high-efficiency florescence output of the all-inorganic perovskite as a temperature sensor.A higher absolute and relative temperature sensitivity(0.0398 K^(-1) and 7.12%/K,respectively),along with the visible color change from orange-red to yellow-green with the increase of temperature is accomplished.Notably,the repeatable florescence intensity of Tb^(3+)-doped CsPbl_(3) QDs under high temperature enables their temperature sensing application.

关键词： CsPbI_(3)quantum dots Thermometry Thermal stability Visual change Rare earths

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Proteomics Uncovers a Role for Enhanced Ultraviolet-B Radiation on Wheat Leaves

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American Journal of Plant Sciences 2013年第6期4卷 1227-1232页

作者： jiangyan Duan xue Tian Zhenhu Jia College of Life Science Shanxi Normal University Linfen China

Wheat (Triticum aestivum), as a kind of important economic crop cultured in the Northern China, is affected by present-day enhanced ultraviolet-B (UV-B) radiation. To get the information of the impact by UV-B radiation on it, the proteins of wheat (Jin mai NO.8) leaves, which were divided into the normal light group (CK) and UV-B radiation group (B), were extracted and ran at SDS-PAGE at different treatment days (5, 6, 7). The proteins were also analyzed by run two-dimensional gel electrophoresis (2-DE), which allowed the identification of some significantly different gel spots. The proteins spots were further verified by Matrix-Assisted Laser Desorption/lonization-time of Flight Mass Spectrometry. The results showed: 1) the enhanced UV-B affects the growth of the wheat, as the visual changes appear on the sixth day;2) the proteins expressions between the B group and the CK group were remarkably different on the sixth day;3) the proteins of wheat leaves of the sixth day were further analyzed by 2-DE revealed that twenty-one protein points were identificated between the B group and the CK group. Among these twenty-one proteins, six proteins of them were up-regulated and twelve proteins of them were down-regulated, three new proteins were expressed only in the B group. Three proteins among six proteins, which were up-regulated, were further verified as RuBisCo large subunit binding protein;SOD;Calmodulin. The result indicates wheat could improve genes encoding proteins in their leaves and protect themselves, when enhanced UV-B affects the growth of the wheat.

关键词： Wheat Ultraviolet-B Radiation 2-DE

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Analysis of Chicken T Cell-Mediated Responses on Thymus after Immune Stress

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Journal of Immune Based Therapies, Vaccines and Antimicrobials 2014年第2期3卷 22-28页

作者： Zhenhu Jia Yufang Cao Yaju xue Fangxiang Li Min Liu Cai Zhang Yufei Yang jiangyan Duan College of Life Science Shanxi Normal University Linfen China

In order to assess chicken T cell-mediated responses after immune stress, 200 two-week-old chickens were randomly divided into control group(C) and treatment groups (T1 and T2). The live I-type of Newcastle disease vaccine (ND) was taken as the source of immunological stress. The chickens in group (T2) were injected with overdose of live I-type Newcastle disease vaccine. After vaccination, the dynamic changes of CD4+, CD8+T cells on thymus were detected by immunohisto-chemistry. The ultra-structure of T cells on thymus of the chickens in group (T2) was observed by electron microscopic. The result showed: (1) After immune stress, from day 1 to day 5, the number of the CD4+T cells significantly declined and reached the bottom at day 5, but the number of the CD8+T cells increased dramatically and peaked at day 5. (2) After immune stress, from day 1 to day 5, part of T cells of chicken thymus came with apoptotic and pathological changes of putrescence continually. These results underscore: the immune stress can cause transient immune adjustment. These changes for chickens were the self-protection mechanism of immune system to adapt to survival and avoid immune disorder.

关键词： T Cells Chicken Thymus Immunological Stress

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基于中西医临床病证特点的自身免疫性肝炎动物模型分析

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中药药理与临床 2023年第11期39卷 100-103,114页

作者：王雪吴宿慧李寒冰李根林徐江雁河南中医药大学河南省仲景方药健康衰老产业工程研究中心郑州450046

自身免疫性肝炎是一种由免疫介导的慢性进行性肝脏疾病,近几年,自身免疫性肝炎的患病率在全世界范围内逐渐增高,复制吻合中西医临床病证特点的动物模型是进行自身免疫性肝炎相关研究的基础。基于自身免疫性肝炎的中西医临床病证特点、... 详细信息

自身免疫性肝炎是一种由免疫介导的慢性进行性肝脏疾病,近几年,自身免疫性肝炎的患病率在全世界范围内逐渐增高,复制吻合中西医临床病证特点的动物模型是进行自身免疫性肝炎相关研究的基础。基于自身免疫性肝炎的中西医临床病证特点、病因病机、诊断标准和中医辨证分型,汇总现有的动物模型造模方法、模型特征,并对其临床吻合度进行分析。发现在众多的自身免疫性肝炎动物模型中,Con A诱导模型、人源CYP2D6诱导模型和肝抗原诱导模型的西医临床吻合度较高。综合分析可以发现,自身免疫性肝炎与中医病证相符的模型较少且吻合度低,很难体现中医辨证论治的特点。因此,建立与中医证候更吻合的动物模型是以后研究的重点。

关键词：自身免疫性肝炎动物模型临床病证臌胀胁痛

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益气活血方对大鼠腰椎间盘突出的影响及机制

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中国药房 2024年第10期35卷 1186-1192页

作者：白雪孙孝先郭杨马勇刘孟敏姜宏林顺曹瑞袁永丰刘锦涛南京中医药大学中西医结合学院南京210023 南京中医药大学骨伤修复与重建新技术实验室南京210023 南京中医药大学附属苏州市中医院骨伤科江苏苏州215008 泰州市姜堰中医院脊柱骨伤科江苏泰州225300 南京中医药大学附属医院放射科南京210023

目的探讨益气活血方(YQHX)对大鼠腰椎间盘突出的影响及机制。方法大鼠随机分为假手术组、模型组、核因子κB(NF-κB)抑制剂组(QNZ组,1 mg/kg)、YQHX组(9.1 g/kg)及联合组(YQHX+QNZ组,剂量同各单药组),每组10只。除假手术组外,其余各组... 详细信息

目的探讨益气活血方(YQHX)对大鼠腰椎间盘突出的影响及机制。方法大鼠随机分为假手术组、模型组、核因子κB(NF-κB)抑制剂组(QNZ组,1 mg/kg)、YQHX组(9.1 g/kg)及联合组(YQHX+QNZ组,剂量同各单药组),每组10只。除假手术组外,其余各组大鼠建立腰椎间盘突出症模型,各给药组大鼠腹腔注射QNZ和/或灌胃YQHX,每天给药1次,连续8周。评估各组大鼠椎间盘突出严重程度,观察椎间盘组织形态学变化、髓核细胞自噬变化,检测血清中肿瘤坏死因子α(TNF-α)水平、椎间盘组织中B细胞淋巴瘤2/腺病毒E1B相互作用蛋白3(BNIP3)、苄氯素1(Beclin-1)阳性细胞百分比,核因子κB(NF-κB)p65磷酸化水平,肿瘤坏死因子受体相关因子2(TRAF-2)、TRAF-3、BNIP3、微管相关蛋白轻链3B(LC3B)蛋白表达水平,以及NF-κB p65、LC3B、p62、BNIP3及Beclin-1 mRNA表达水平。结果与模型组比较,YQHX组大鼠椎间盘Pfirrmann分级评分显著降低,病理损伤减轻;髓核细胞自噬小体数量增加;血清中TNF-α水平和椎间盘组织中p62 mRNA表达水平均显著降低;椎间盘组织中BNIP3、Beclin-1阳性细胞百分比,NF-κB p65磷酸化水平,TRAF-2、TRAF-3、BNIP3、LC3B蛋白表达水平,NF-κB p65、LC3B、BNIP3、Beclin-1 mRNA表达水平均显著升高(P<0.05)。加入QNZ可部分逆转YQHX组上述指标的变化。结论YQHX可能通过激活NF-κB信号通路促进大鼠椎间盘自噬水平升高,减轻炎症反应,延缓腰椎间盘突出症进展。

关键词：腰椎间盘突出炎症反应 NF-κB信号通路自噬

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基于纳米铂修饰电极的电化学法测定对苯二酚

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分析试验室 2020年第10期39卷 1199-1202页

作者：霍燕燕雪瑶武江艳韩权西安文理学院化学工程学院西安710065

利用5-(5-氰基-2-吡啶偶氮)-2,4-二氨基甲苯(5-CN-PADAT)与Pt(IV)生成稳定的络合物,采用循环伏安法,扫描电位范围为-1.35^-0.35 V,沉积35圈,制备了Pt NPs-5-CN-PADAT修饰电极。采用X射线粉末衍射法、场发射扫描电镜对其进行了表征,并研... 详细信息

利用5-(5-氰基-2-吡啶偶氮)-2,4-二氨基甲苯(5-CN-PADAT)与Pt(IV)生成稳定的络合物,采用循环伏安法,扫描电位范围为-1.35^-0.35 V,沉积35圈,制备了Pt NPs-5-CN-PADAT修饰电极。采用X射线粉末衍射法、场发射扫描电镜对其进行了表征,并研究了对苯二酚在该电极上的电化学行为。结果表明:在p H 2.0的磷酸盐缓冲溶液中,对苯二酚在该修饰电极上产生一对明显的氧化还原峰。基于此建立了一种测定对苯二酚的电化学传感新方法,对苯二酚浓度在3~100μmol/L范围内与峰电流呈线性关系,检出限为0.103μmol/L。方法用于实际样品的分析,回收率为97.0%~114.8%。

关键词：电化学纳米铂/GCE修饰电极对苯二酚纳米传感器

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