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Optimizing high-coordination shell of Co-based single-atom catalysts for efficient ORR and zinc-air batteries

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Journal of Energy Chemistry 2024年第8期95卷 306-314,I0007页

作者： Yugang Qi Qing Liang kexin Song Xinyan Zhou Meiqi Liu Wenwen Li Fuxi Liu Zhou Jiang Xu Zou Zhongjun Chen Wei Zhang Weitao Zheng Key Laboratory of Automobile Materials MOE School of Materials Science&Engineering Electron Microscopy Centerand International Center of Future ScienceJilin Provincial International Cooperation Key Laboratory of High-Efficiency Clean Energy MaterialsJilin UniversityChangchun 130012JilinChina Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Atom-level modulation of the coordination environment for single-atom catalysts(SACs)is considered as an effective strategy for elevating the catalytic *** the MNxsite,breaking the symmetrical geometry and charge distribution by introducing relatively weak electronegative atoms into the first/second shell is an efficient way,but it remains challenging for elucidating the underlying mechanism of ***,a practical strategy was reported to rationally design single cobalt atoms coordinated with both phosphorus and nitrogen atoms in a hierarchically porous carbon derived from metal-organic frameworks.X-ray absorption spectrum reveals that atomically dispersed Co sites are coordinated with four N atoms in the first shell and varying numbers of P atoms in the second shell(denoted as Co-N/P-C).The prepared catalyst exhibits excellent oxygen reduction reaction(ORR)activity as well as zinc-air battery *** introduction of P atoms in the Co-SACs weakens the interaction between Co and N,significantly promoting the adsorption process of ^(*)OOH,resulting in the acceleration of reaction kinetics and reduction of thermodynamic barrier,responsible for the increased intrinsic *** discovery provides insights into an ultimate design of single-atom catalysts with adjustable electrocatalytic activities for efficient electrochemical energy conversion.

关键词： Electrocatalytic Oxygen reduction reaction Single atom catalyst Shell coordination optimization

Remote-controlled dexamethasone-duration on eye-surface with a micelle-magnetic nanoparticulate co-delivery system for dry eye disease

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Acta Pharmaceutica Sinica B 2024年第8期14卷 3730-3745页

作者： Qinxiang Zheng Chaoxiang Ge kexin Li Longxin Wang Xiaoyu Xia Xiao Liu Rashid Mehmood Jianliang Shen Kaihui Nan Wei Chen Sen Lin National Engineering Research Center of Ophthalmology and Optometry Eye HospitalWenzhou Medical UniversityWenzhou 325027China National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhou 325027China Zhejiang Engineering Research Center for Tissue Repair Materials Wenzhou InstituteUniversity of Chinese Academy of SciencesWenzhou 325000China School of Chemical Engineering UNSW SydneyHigh StreetBuilding E10KensingtonNSW 2052Australia Adult Cancer Program Lowy Cancer Research CentreUNSW SydneyCorner Botany&High StreetsKensingtonNSW 2052Australia

Dexamethasone(DEX)is used to treat ocular surface ***,regulating DEX duration in tears while preventing its absorption into the anterior chamber is critical for balancing its therapy effects and the side *** this study,a novel magnetic nanoparticle(MNP)-micelle(MC)codelivery system(MMDS)was *** MC moiety in the MMDS served as the carrier for DEX and the MNP part endowed the MMDS with magnetic-responsive *** extend its residency,the MMDS was magnetically attracted by an external magnet after instilling,which acted as a precorneal drug-depot enabling a sustainable release of DEX in *** combination of magnet treatment,the topical instillation of MMDS@DEX significantly prolonged the DEX-retention in tears and increased the DEX-concentration in the cornea and conjunctiva,as well as concurrently reduced the DEX-level in the aqueous humor,when compared with the commercial DEX eye drop *** combination of MMDS@DEX and magnet treatment exerted significantly better therapeutic effects against DED with smaller side effects than conventional treatments including DEX suspension,commercial DEX eye drops,as well as the MMDS@DEX treatment *** present work provided a new method for the effective delivery of DEX to ocular surface tissues while reducing its side effects,which will be beneficial to the treatments of a wide range of ocular surface diseases.

关键词： Magnetic nanoparticle Micelle Dexamethasone Eye drop Bioavailability Dry eye disease Cornea Conjunctiva

Insights into the electron transfer mechanisms of peroxydisulfate activation by modified metal-free acetylene black for degradation of sulfisoxazole

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Chinese Chemical Letters 2024年第8期35卷 349-356页

作者： Chunxiu Yu Zelin Wu Hongle Shi Lingyun Gu kexin Chen Chuan-Shu He Yang Liu Heng Zhang Peng Zhou Zhaokun Xiong Bo Lai State Key Laboratory of Hydraulics and Mountain River Engineering College of Architecture and EnvironmentSichuan UniversityChengdu 610065China Sichuan Academy of Eco-Environmental Sciences Chengdu 610041China Sino-German Centre for Water and Health Research Sichuan UniversityChengdu 610065China

Herein,a modified metal-free acetylene black(MMF-AB)catalyst was synthesized by a simple solvothermal-calcination method and designed successfully to activate peroxodisulfate(PDS)for the degradation of sulfisoxazole(SIZ).Due to the doping of N,S and O metal-free elements,the modified catalyst showed excellent catalytic performance with 100%SIZ removal within 30 *** first-order reaction rate constants(evaluating catalytic efficiencies and activity)of MMF-AB(kobs=0.105 min^(−1))was 3 times higher than pure-AB(k_(obs)=0.029 min^(−1)).Interestingly,it was demonstrated that the reaction sys-tem is based on the transfer of electrons from SIZ to PDS to realize an electron-transfer-based mechanism by the evidence of premixing,electron paramagnetic resonance(EPR)spectroscopy,salt-bridge experi-ments and electrochemical *** introduction of recyclable filtration device solved the secondary pollution caused by the dispersion of the powdered catalyst in the treated water,which further proved the practicality and superiority of the MMF-AB catalyst.

关键词： Peroxydisulfate Sulfisoxazole Acetylene black Electrochemical Electron transfer

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能量桩温度及变形特性现场实测研究

安徽理工大学学报（自然科学版） 2022年第3期42卷 36-43页

作者：尹可心 Roxana Vasilescu 南京航空航天大学土木与机场工程系江苏南京211106 南特中央理工学院土木工程系大西洋卢瓦尔省南特44321 PINTO建筑工程公司特殊基础工程部伊勒-维莱讷省富热尔35300

能量桩技术作为一种利用浅层地热能的新技术,可以有效降低建筑物能源消耗,减少二氧化碳排放。为研究能量桩系统在运行前后的较长时期内的进/出口换热液体温度、桩身温度以及轴向变形等特征,对位于法国塞纳-马恩省的Sept Sorts镇某新建... 详细信息

能量桩技术作为一种利用浅层地热能的新技术,可以有效降低建筑物能源消耗,减少二氧化碳排放。为研究能量桩系统在运行前后的较长时期内的进/出口换热液体温度、桩身温度以及轴向变形等特征,对位于法国塞纳-马恩省的Sept Sorts镇某新建污水预处理厂房的能量桩系统开展了现场全尺监测试验。监测结果显示,换热管网进口(T_(inlet))和出口(T_(outlet))液体之间的平均温度差约为5℃,表明该能量桩系统具有良好的换热能力。在能量桩运行前,随深度增加,桩身温度先减小然后趋于稳定,最终保持在13℃左右(桩体深度>5m)。在能量桩运行后,在装有换热管的7m深度范围内桩身温度基本保持恒定。此外,能量桩运行前后的桩身温度变化幅度相差不大,均小于10℃。由能量桩运行引起的桩身轴向变形与由季节性土体温度变化引起的轴向变形具有相同的数量级,但前者沿桩体上的区域分布更加均匀。在监测期间,桩身轴向应变变化范围为-50μm/m~+30μm/m,数值虽小但在设计中不应忽略。

关键词：能量桩温度变化轴向应变现场试验

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中国二手车在线司法拍卖的非参数估计

系统工程理论与实践 2024年第9期44卷 3049-3061页

作者：刘年青许可欣厦门大学邹至庄经济研究院厦门361005 厦门大学经济学院厦门361005 中国计量大学经济与管理学院杭州310018 上海财经大学经济学院上海200000

近些年来,中国在线司法拍卖发展迅速,对该领域的实证研究具有十分重要的现实意义.这篇文章采用阿里巴巴平台上中国二手车在线司法拍卖的数据,对选择性进入模式下增价拍卖的进入成本进行了非参数估计.基于Athey和Haile(2002)以及Levin和S... 详细信息

近些年来,中国在线司法拍卖发展迅速,对该领域的实证研究具有十分重要的现实意义.这篇文章采用阿里巴巴平台上中国二手车在线司法拍卖的数据,对选择性进入模式下增价拍卖的进入成本进行了非参数估计.基于Athey和Haile(2002)以及Levin和Smith(1994)提出的识别策略,我们提出了一种两步估计法.通过对实证结果进行分析,我们得出以下四点结论:1)私人价值的经验分布符合随机占优性质,且进入后价值分布估计值的置信区间较为紧密.2)进入成本的估计值对于评估价格具有单调性,评估价格越高,进入成本估计值也会越高.3)增价拍卖获得的收益高于一价密封拍卖,且在低中高百分位数上都具有明显优势.4)当进入成本减少时,收益会有所改善;当进入成本增加时,收益会出现下降.且进入成本降低带来的收益改善幅度,比进入成本提高带来的收益降低幅度更大.

关键词：在线司法拍卖选择性进入进入成反事实分析

Protective effect of BlingLife®-berry extract on blue lightinduced eye damage and its mechanism

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Asian Journal of Traditional Medicines 2024年第1期19卷 1-9页

作者： Jiaxiang Ding Chenfeng Shou kexin Xie School of Public Foundation Bengbu Medical CollegeBengbu 233000China Department of Emergency Surgery the Second HospitalAnhui Medical UniversityHefei 230001China State Key Laboratory of Pharmaceutical Biotechnology School of life SciencesNanjing UniversityNanjing 210023China

This study aims to investigate the protective effects of BlingLife®-berry extract on the ***®-berry extract is a mixture of high-quality natural berries,including blackcurrant,aromia,bilberry and *** main active ingredient responsible for theeye-protective effects is *** are natural water-soluble pigments belonging to the flavonoid class,and theyhave multiple benefits,including improving vision,anti-inflammatory and antibacterial properties,and antioxidant *** the dual benefits of anthocyanins in protecting vision and eliminating free radicals,this study explores the comprehensive eye protective effects of BlingLife®-berry extract in terms of combating blue light-induced eye damage and oxidative stress-inducedvisual *** results provide robust evidence for the in vivo effects and further technological applications of BlingLife®-berry extract.

关键词： BlingLife®-berry extract combination anthocyanins antioxidant protecting vision eliminating radicals

Rehmanniae Radix Praeparata aqueous extract improves hepatic ischemia/reperfusion injury by restoring intracellular iron homeostasis

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Chinese Journal of Natural Medicines 2024年第9期22卷 769-784页

作者： ZHANG yinhao JIA kexin LI Yufei MA Zhi FAN Guifang LUO Ranyi LI Yajing YANG Yang LI Fanghong LIU Runping LIU Jia LI Xiaojiaoyang School of Life Sciences Beijing University of Chinese MedicineBeijing 100029China School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing 100029China Available online 20 Sep.2024

Hepatic ischemia/reperfusion injury(HIRI)is a common pathophysiological condition occurring during or after liver resection and transplantation,leading to hepatic viability impairment and functional ***,ferroptosis,a newly recognized form of programmed cell death,has been implicated in *** Radix Praeparata(RRP),extensively used in Chinese herbal medicine for its hepatoprotective,anti-inflammatory,and antioxidant properties,presents a potential therapeutic ***,the mechanisms by which RRP mitigates HIRI,particularly through the regulation of ferroptosis,remain *** this study,we developed a HIRI mouse model and monocrotaline(MCT)-and erastin-induced in vitro hepatocyte injury *** conducted whole-genome transcriptome analysis to elucidate the protective effects and mechanisms of RRP on *** RRP aqueous extract was characterized by the presence of acteoside,rehmannioside D,and *** results demonstrate that the RRP aqueous extract ameliorated oxidative stress,reduced intracellular iron accumulation,and attenuated HIRI-induced liver ***,RRP significantly inhibited hepatocyte death by restoring intracellular iron homeostasis both in vivo and in ***,the RRP aqueous extract reduced intrahepatocellular iron accumulation by inhibiting ZIP14-mediated iron uptake,promoting hepcidin-and ferroportin-mediated iron efflux,and ameliorating mitochondrial iron aggregation through upregulation of Cisd1 ***,siRNA-mediated inhibition of hamp synergistically enhanced the RRP aqueous extract's inhibitory effect on *** conclusion,our study elucidates the mechanisms by which RRP aqueous extracts alleviate HIRI,highlighting the restoration of iron metabolic *** findings position RRP as a promising candidate for clinical intervention in HIRI treatment.

关键词： Hepatic ischemia/reperfusion injury Rehmanniae Radix Praeparata Ferroptosis Intracellular iron homeostasis

GAFEE:5 Steps to Teach Effectively

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教育技术与创新 2024年第3期6卷 56-71页

作者： kexin Li Yi Dai Jincheng Li School of Education City University of MacaoChina

The authors first propose the GAFEE(Goal-Oriented Engagement,Autonomous Exploration,Feedback-Enhanced Explanation,Challenge-Driven Elaboration,Collaborative Evaluation,Iterative Design,and Technological Synergy)instructional design model,which is based on the integration of gamified teaching and the 5E teaching *** aims to address the issue of gamification not being systematically incorporated into the curriculum,while also enhancing engagement in the educational setting,stimulating interest in learning,and achieving better learning *** theoretical application of the GAFEE model is demonstrated through a hypothetical case involving a fourth-grade English class,highlighting its potential to improve students'vocabulary acquisition,grammar comprehension,and speaking *** study argues that the GAFEE model offers a novel approach to enhancing instructional practices by leveraging gamification *** also emphasizes the need for empirical research to validate the model's effectiveness and broader applicability in gamified educational settings.

关键词： Gamification 5E model GAFEE instructional design

Unlocking the potential of thin-film composite reverse osmosis membrane performance:Insights from mass transfer modeling

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Chinese Chemical Letters 2024年第5期35卷 66-76页

作者： kexin Yuan Yulei Liu Haoran Feng Yi Liu Jun Cheng Beiyang Luo Qinglian Wu Xinyu Zhang ying Wang Xian Bao Wanqian Guo Jun Ma State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China College of Architecture and Environment Sichuan UniversityChengdu 610065China School of Municipal and Environmental Engineering Shandong Jianzhu UniversityJi’nan 250101China College of Water Conservancy and Hydropower Engineering Sichuan Agricultural UniversityYaan 625014China

Thin-film composite(TFC)reverse osmosis(RO)membranes have attracted considerable attention in water treatment and desalination processes due to their specific separation ***,the trade-off effect between water flux and salt rejection poses huge challenges to further improvement in TFC RO membrane *** research works have been dedicated to optimizing membrane fabrication and modification for addressing this *** the meantime,several reviews summarized these ***,the existing reviews seldom analyzed these methods from a theoretical perspective and thus failed to offer effective optimization directions for the RO process from the root *** this review,we first propose a mass transfer model to facilitate a better understanding of the entire process of how water and solute permeate through RO membranes in detail,namely the migration process outside the membrane,the dissolution process on the membrane surface,and the diffusion process within the ***,the water and salt mass transfer behaviors obtained from model deduction are comprehensively analyzed to provide potential guidelines for alleviating the trade-off effect between water flux and salt rejection in the RO ***,inspired by the theoretical analysis and the accurate identification of existing bottlenecks,several promising strategies for both regulating RO membranes and optimizing operational conditions are proposed to further exploit the potential of RO membrane *** review is expected to guide the development of high-performance RO membranes from a mass transfer theory standpoint.

关键词： Reverse osmosis Mass transfer model Trade-off effect Membrane performance Optimization strategies