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An ultra-sensitive biosensor for circulating microRNA detection with Fe single-atom enhanced cathodic luminol-O2 electrochemiluminescence

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Nano Research 2024年第9期17卷 7926-7934页

作者： Yudie Sun Yunxiang han mingyue Wang mingfu Ye Konglin Wu Kui Zhang School of Chemistry and Chemical Engineering Anhui University of TechnologyMa'anshan 243032China Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science MOEQingdao University of Science and TechnologyQingdao 266042China Engineering Research Center of Biofilm Water Purification and Utilization Technology of ministry of Education Anhui University of TechnologyMa'anshan 243032China

Circulating microRNAs(miRNAs)play a pivotal role in the occurrence and development of acute myocardial infarction(AmI),and precise detection of them holds significant clinical *** development of luminol-based luminophores in the field of electrochemiluminescence(ECL)for miRNA detection has been significant,while their effectiveness is hindered by the instability of co-reactant hydrogen peroxide(H_(2)O_(2)).In this work,an iron single-atom catalyst(Fe-PNC)was employed for catalyzing the luminol-O2 ECL system to achieve ultra-sensitive detection of myocardial *** miRNA triggers a hybridization chain reaction(HCR),resulting in the generation of a DNA product featuring multiple sticky ends that facilitate the attachment of Fe-PNC probes to the electrode *** Fe-PNC catalyst exhibits high promise and efficiency for the oxygen reduction reaction(ORR)in electrochemical energy conversion *** resulting ECL biosensor allowed ultrasensitive detection of myocardial miRNA with a low detection limit of 0.42 fm and a wide linear range from 1 fm to 1.0 ***,it demonstrates exceptional performance when evaluated using serum samples collected from patients with *** work expands the application of single-atom catalysis in ECL sensing and introduces novel perspectives for utilizing ECL in disease diagnosis.

关键词： circulating miRNAs single-atom catalyst luminol-O2 electrochemiluminescence hybridization chain reaction

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Development of hyaluronic acid-based edible film for alleviating dry mouth

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Food Science and Human Wellness 2023年第2期12卷 371-377页

作者： Dong-Keon Kweon Jung-ah han Jinwoo Bio Co. Ltd.Yongin 17111Korea Department of Food and Nutrition Sangmyung UniversitySeoul 03016Korea

For alleviating dry mouth symptoms,edible films based on hyaluronic acid(HA)with 3 different m(800,1200 and 2300 kDa)were prepared(800 F,1200 F and 2300 F,respectively),and the properties as well as effectiveness were *** concentration of each HA dispersion for film forming was set as 3.0%,1.5%or 1.0%,for the m800,1200 and 2300 kDa,respectively,based on the *** 800 F showed the highest thickness,tensile strength,and water vapor transparency,whereas obtained the lowest transparency and elongation at break among *** of the HA films showed safety against microorganism during 28 storage day at 40℃with 60%*** optimum site for film attachment in mouth was the palate,and800 F was the most effective for stimulating saliva secretion,eliciting a 38%increase compared to control(without film),tested by the elderly over 65 years *** the sensory test,800 F was also the most *** on above results,the edible films effectively stimulating saliva secretion could be produced with HA,and the physical,sensory characteristics as well as disintegration times of the film could be controlled by mand the dissolution concentration of HA.

关键词： Edible film Hyaluronic acid Saliva stimulating Tensile strength Thickness

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Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries

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Journal of Energy Chemistry 2024年第1期88卷 532-542,I0012页

作者： Ruo Wang Jiawei Li Bing han Qingrong Wang Ruohong Ke Tong Zhang Xiaohu Ao Guangzhao Zhang Zhongbo Liu Yunxian Qian Fangfang Pan Iseult Lynch Jun Wang Yonghong Deng Department of materials Science&Engineering School of Innovation and EntrepreneurshipSouthern University of Science and TechnologyShenzhen 518055GuangdongChina School of Geography Earth and Environmental SciencesUniversity of BirminghamEdgbastonBirmingham B152TTUK Key Laboratory of marine Environmental Corrosion and Bio-Fouling Institute of OceanologyChinese Academy of SciencesQingdao 266071ShandongChina Shenzhen CAPCHEm Technology Co. Ltd.Shenzhen 518118GuangdongChina CALB Group Co. Ltd.Changzhou 213200JiangsuChina

Li metal batteries using high-voltage layered oxides cathodes are of particular interest due to their high energy ***,they suffer from short lifespan and extreme safety concerns,which are attributed to the degradation of layered oxides and the decomposition of electrolyte at high voltage,as well as the high reactivity of metallic *** key is the development of stable electrolytes against both highvoltage cathodes and Li with the formation of robust interphase films on the ***,we report a highly fluorinated ether,1,1,1-trifluoro-2-[(2,2,2-trifluoroethoxy)methoxy]ethane(TTmE),as a cosolvent,which not only functions as a diluent forming a localized high concentration electrolyte(LHCE),but also participates in the construction of the inner solvation *** TTmE-based electrolyte is stable itself at high voltage and induces the formation of a unique double-layer solid electrolyte interphase(SEI)film,which is embodied as one layer rich in crystalline structural components for enhanced mechanical strength and another amorphous layer with a higher concentration of organic components for enhanced *** Li||Cu cells display a noticeably high Coulombic efficiency of 99.28%after 300 cycles and Li symmetric cells maintain stable cycling more than 3200 h at 0.5 mA/cm^(2) and 1.0m ah/cm^(2).In addition,lithium metal cells using LiNi_(0.8)Co_(0.1)mn_(0.1)O_(2) and Li CoO_(2) cathodes(both loadings~3.0 m ah/cm^(2))realize capacity retentions of>85%over 240 cycles with a charge cut-off voltage of 4.4 V and 90%for 170 cycles with a charge cut-off voltage of 4.5 V,*** study offers a bifunctional ether-based electrolyte solvent beneficial for high-voltage Li metal batteries.

关键词： Lithium metal batteries High-voltage layered oxides Fluorinated ether-based electrolytes Solid electrolyte interphase Cathode electrolyte interphase

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稀土离子(RE=La3+,Gd3+,Lu3+)掺杂Na3V2（PO4）3/C正极材料的制备及电化学性能研究

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中国稀土学报 2024年第4期42卷 719-729页

作者：焦韩曹轶韩华玮郭世宏龙震天津理工大学功能晶体研究院天津理工大学化学化工学院

在钠离子电池正极材料体系中，钠超离子导体型Na3V2（PO4）3（NVP）因其高电压平台和良好的循环稳定性而备受关注，然而，其本征电导率较差严重限制了其实际应用。通过球磨辅助固相法制备了稀土离子(La3+,Gd3+,Lu3+)掺杂的Na3V2-xREx（... 详细信息

在钠离子电池正极材料体系中，钠超离子导体型Na3V2（PO4）3（NVP）因其高电压平台和良好的循环稳定性而备受关注，然而，其本征电导率较差严重限制了其实际应用。通过球磨辅助固相法制备了稀土离子(La3+,Gd3+,Lu3+)掺杂的Na3V2-xREx（PO4）3/C （x=0,0.01,0.03,0.05）正极材料。通过X射线衍射（XRD）、扫描电镜（SEm）、X射线能谱（EDS）证实了稀土离子(La3+,Gd3+,Lu3+)在NVP/C结构中的成功掺杂，同时通过电化学测试研究了稀土离子(La3+,Gd3+,Lu3+)掺杂对NVP/C的电化学性能的影响。结果表明，La3+和Gd3+的掺杂均能在不同程度上改善NVP/C材料的电化学性能。NVP/C-La0.03和NVP/C-Gd0.03在1C倍率下的初始放电比容量分别为110和105.5 m ah·g-1,200次循环后容量保持率分别为97.5%和95.7%。在这些掺杂样品中NVP/C-La0.03表现出的电化学性能最佳，即使在5C的倍率下循环500次后，放电比容量仍可达100.05 m ah·g-1。因此，适当的稀土离子掺杂对提高NVP/C正极材料的电化学性能有一定的提升作用，为钠离子电池正极材料的深入探索提供了基础研究支撑。

关键词：钠离子电池磷酸钒钠正极材料稀土离子掺杂

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Synthesis of crosslinked polystyrene particles by seeded batch polymerization with monomer absorption

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Transactions of Nonferrous metals Society of China 2011年第A1期21卷 153-159页

作者： Ki-Chang LEE han.ah WI Department of Polymer Science and Engineering Engineering Research Institute Gyeongsang National University

A highly crosslinked, monodispersed polystyrene(PS) particle was prepared by a seeded batch dispersion polymerization with a monomer absorption method. Prior to polymerization, 1.9 μm monodispersed PS seed particles were treated under an optimum condition of monomer absorption. The effects of divinylbenzebe(DVB) concentration and polymerization temperature were examined for styrene(in PS seed)/styrene(in the second stage) mass ratio of 1:1 in the medium range of EtOH/water mass ratio of 100/0-80/20 and 2.3 μm uniform crosslinked PS particles containing 15%-20% (mass fraction) DVB were prepared at 60-70 °C. The results show that monomer absorption before the second stage of polymerization is more effective to prepare highly crosslinked monodispersed PS particles.

关键词：聚苯乙烯颗粒间歇聚合体吸收交联种子合成单分散聚合单体

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Sodium-Coordinated Polymeric Phthalocyanines as Stable High-Capacity Organic Anodes for Sodium-Ion Batteries

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Energy & Environmental materials 2023年第4期6卷 22-30页

作者： Jeongyeon Lee Yoonbin Kim Soyong Park Kang Ho Shin Gun Jang min Jun Hwang Daekyu Kim Kyung-ah min Ho Seok Park Byungchan han Dennis K.P.Ng Lawrence Yoon Suk Lee Department of Applied Biology and Chemical Technology and Research Institute for Smart Energy The Hong Kong Polytechnic UniversityHung HomKowloon Hong Kong SAR China Department of Chemistry The Chinese University of Hong KongShatinNew Territories Hong Kong SAR China Convergence Research Center for Energy and Environmental Sciences Sungkyunkwan UniversitySuwon Korea Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoul Korea School of Chemical Engineering Sungkyunkwan UniversitySuwon Korea

Sodium-ion batteries(SIBs)have attracted considerable interest as an alternative to lithium-ion batteries owing to their similar electrochemical performance and superior long-term cycle *** materials are regarded as promising anode materials for constructing SIBs with high capacity and good ***,utilization of organic materials is rather limited by their low energy density and poor stability at high current *** overcome these limitations,we utilized a novel polymeric disodium phthalocyanines(pNaPc)as SIB anodes to provide stable coordination sites for Na ions as well as to enhance the stability at high current *** varying the linker type during a one-pot cyclization and polymerization process,two pNaPc anodes with O-(O-pNaPc)and S-linkers(S-pNaPc)were prepared,and their structural and electrochemical properties were *** O-pNaPc binds Na ions with a lower binding energy compared with S-pNaPc,which leads to more facile Na-ion coordination/dissociation when engaged as SIB *** use of O-pNaPc significantly improves the redox kinetics and cycle stability and allows the fabrication of a full cell against Na_(3)V_(2)(PO_(4))_(2)F_(3)/C cathode,which demonstrates its practical application with high energy density(288 Wh kg^(-1))and high power density(149 W kg^(-1)).

关键词： coordination chemistry organic anode phthalocyanine polymerization sodium ion battery

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公路隧道喷射型ECC物理力学性能及其喷层稳定性

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工程科学与技术 2024年第3期56卷 109-121页

作者：胡时李晓芳蔡海兵韩辰悦宋海清安徽理工大学土木建筑学院安徽淮南232001 清华大学山西清洁能源研究院山西太原030032 同济大学土木工程学院上海200092 安徽文达信息工程学院城市建设学院安徽合肥231201

传统纤维增强水泥基复合材料(ECC)存在成本高、收缩大和应用场景局限等问题,且关于开挖扰动下公路隧道喷射型ECC层稳定性的研究尚不完善,此外缺乏对其工程应用后的监测评估。基于此,本文研究了公路隧道喷射型ECC的物理力学性能,分析了... 详细信息

传统纤维增强水泥基复合材料(ECC)存在成本高、收缩大和应用场景局限等问题,且关于开挖扰动下公路隧道喷射型ECC层稳定性的研究尚不完善,此外缺乏对其工程应用后的监测评估。基于此,本文研究了公路隧道喷射型ECC的物理力学性能,分析了开挖扰动下围岩及喷射型ECC层的稳定性,并通过现场监测分析了其应用效果。结果表明:将脱硫石膏、混杂纤维、机制砂、膨胀剂和减缩剂引入ECC中,所研发的喷射型ECC物理力学性能满足公路隧道喷射混凝土的要求。基于数值模拟,当支护12 m后,喷射型ECC层的拉伸和压缩最大主应力较C25喷射混凝土(C25SC)层分别提高了36.8%、28.4%,并且其内侧拱顶的最大竖向位移较C25SC可降低3.15%,仅为1.23 mm。基于现场实测,在近似相同的围岩地质条件下,使用喷射型ECC较C25SC,能够降低10.26%的竖直沉降变形,此外其喷层表面未发现开裂、线状渗水等情况。因此,喷射型ECC在公路隧道支护领域具有广阔的应用前景。

关键词：喷射型ECC 公路隧道物理力学性能数值模拟稳定性

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密闭管道内瓦斯爆炸卷扬沉积煤尘爆炸传播特性

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煤炭学报 2024年第4期49卷 1941-1951页

作者：江丙友洪汉苏明清鲁昆仑杨炳辉王培龙丁大伟安徽理工大学工业粉尘防控与职业安全健康教育部重点实验室安徽淮南232001 中国安全生产科学研究院北京100012 安徽理工大学安全科学与工程学院安徽淮南232001

为了探究密闭管道内瓦斯爆炸卷扬沉积煤尘爆炸的传播特性,在自主研制的瓦斯爆炸卷扬沉积煤尘爆炸试验系统内,从爆炸压力、火焰以及压力-火焰的耦合关系等方面,研究了不同瓦斯体积分数及煤尘质量浓度下瓦斯爆炸卷扬沉积煤尘爆炸的爆炸压... 详细信息

为了探究密闭管道内瓦斯爆炸卷扬沉积煤尘爆炸的传播特性,在自主研制的瓦斯爆炸卷扬沉积煤尘爆炸试验系统内,从爆炸压力、火焰以及压力-火焰的耦合关系等方面,研究了不同瓦斯体积分数及煤尘质量浓度下瓦斯爆炸卷扬沉积煤尘爆炸的爆炸压力传播特性及火焰传播特性,并利用Fluent数值模拟软件分析了煤尘的卷扬分散特征。结果表明:密闭管道内瓦斯体积分数为10%时的最大爆炸压力整体高于瓦斯体积分数为12%和8%时的最大爆炸压力。当瓦斯体积分数为10%,煤尘质量浓度为250 g/m^(3)时,最大爆炸压力传播规律表现为在瓦斯段先升后降再升,到达煤尘段后持续上升;随着煤尘质量浓度的增加,在瓦斯段则表现为先升后降,在煤尘段依旧持续上升。当瓦斯体积分数为8%和12%时,最大爆炸压力随煤尘质量浓度增加呈上升趋势,而瓦斯体积分数为10%时则呈现下降趋势。密闭管道内火焰锋面到达时间与传播距离呈正相关,瓦斯体积分数为10%时火焰锋面到达各测点的时间短于瓦斯体积分数为12%和8%的传播时间。火焰传播速度随传播距离呈先增大后减小的趋势,当瓦斯体积分数为10%时,火焰传播速度最快。密闭管道内瓦斯爆炸卷扬沉积煤尘爆炸的爆炸压力-时间曲线会出现2次峰值。第1次峰值是由瓦斯爆炸的前驱冲击波产生,当火焰传播至煤尘段后,压力同时开始上升,且压力峰值时刻和火焰峰值时刻耦合,达到第2次压力峰值,随着火焰信号的消失,压力逐渐减小直至反应停止。密闭管道内前驱冲击波与反射波使得煤尘卷扬分散,形成“漩涡状”煤尘云,促进煤粉与爆燃波接触。当煤尘质量浓度一定时,体积分数为10%瓦斯的卷扬程度优于体积分数12%和8%瓦斯;当瓦斯体积分数一定时,煤尘卷扬程度随煤尘质量浓度的增加而递减。

关键词：密闭管道瓦斯爆炸煤尘爆炸煤尘卷扬火焰传播特性压力-火焰耦合

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A one-for-all strategy of polyimide coating layer for resolving the comprehensive issues of phosphorus anode

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Journal of Energy Chemistry 2022年第7期31卷 276-282,I0008页

作者： muyao han Shaojie Zhang Yu Cao Chengyu han Xu Li Yiming Zhang Zhanxu Yang Jie Sun Key Laboratory for Green Chemical Technology of ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin UniversityTianjin 300350China School of Petrochemical Engineering Liaoning Petrochemical UniversityFushun 113001LiaoningChina

Phosphorus is a promising anode with high capacity (2596 mah g^(-1)and 6075~6924 mah cm^(-3)),low lithium-ion diffusion barrier (0.08 e V),and appropriate lithiation potential (~0.7 V vs Li+/Li).However,it faces the problems of huge volume expansion (~300%),low electronic conductivity (10^(-14)~10^(2)S cm^(-1)),soluble intermediates (lithium polyphosphides,Li_(x)Ps),degradation in air,and low thermal *** this work,phosphorus/carbon nanotube composites were coated with a polyimide layer,which plays the roles of a buffer layer to relieve the volume expansion of phosphorus,an obstruct layer to confine LixPs,an inert layer to prevent the degradation of phosphorus in air,a heat resistant layer to improve the thermal stability of the *** resulting composites (P/CNT@PI) display high capacity retention of798.1 m ah g^(-1)after 150 cycles at 1 A g^(-1),achieving 17 times as much as the control sample (P/CNT).

关键词： Phosphorus anode Polyimide Lithium-ion batteries Surface coating

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磷酸氧钒钠纳米片的可控制备研究

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化学学报 2024年第3期82卷 274-280页

作者：张东彬袁欣然辛亚男刘天豪韩慧果杜光超滕艾均鞍钢集团北京研究院有限公司北京102211 成都先进金属材料产业技术研究院股份有限公司成都610300 攀钢集团研究院有限公司钒钛资源综合利用国家重点实验室四川攀枝花617000

基于磷酸氧钒钠的制备条件苛刻、颗粒粒径大和电导率差等问题,提出了一种制备纳米片状磷酸氧钒钠的新方法.通过特定条件下的表面能调控技术,实现纳米片状磷酸氧钒钠的可控制备.通过对不同生长时间的产物进行监测分析,研究了纳米片的形... 详细信息

基于磷酸氧钒钠的制备条件苛刻、颗粒粒径大和电导率差等问题,提出了一种制备纳米片状磷酸氧钒钠的新方法.通过特定条件下的表面能调控技术,实现纳米片状磷酸氧钒钠的可控制备.通过对不同生长时间的产物进行监测分析,研究了纳米片的形成过程.结合密度泛函理论(DFT)模拟计算,分析了片状磷酸氧钒钠的成片机理.调控不同硫酸根的添加量,研究了不同硫酸根条件下磷酸氧钒钠的微观形貌变化规律,验证了片状磷酸氧钒钠的成片机制.研究SO_(4)^(2-)离子在不同晶面的吸附改变了不同晶面的表面能大小,改变了磷酸氧钒钠晶核优势生长取向,实现了定向生长与自组装,最终获得了独特的纳米片状磷酸氧钒钠.由于独特的纳米片状微观形貌,所制备的片状磷酸氧钒钠具有更高的比表面积和压实密度.其比表面积为16.2m^(2)/g,优于纳米颗粒状磷酸氧钒钠的4.3m^(2)/g,压实密度达到1.86 g/cm^(3),高于颗粒状磷酸氧钒钠的1.77 g/cm^(3).此外,纳米片状磷酸氧钒钠还表现出优异的储钠性能.在0.1 C电流密度条件下,纳米片状磷酸氧钒钠的放电比容量达到93.76m ah/g,大于相同放电电流密度下,纳米颗粒状磷酸氧钒钠的82.85 mah/g.同时,10 C电流密度条件下,循环100次后,仍能保持105%的初始容量(相同情况下,纳米颗粒状磷酸氧钒钠仅有92%),表现出良好的循环稳定性.

关键词：纳米片磷酸氧钒钠可控制备表面能取向生长

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