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Research 2024年第1期2023卷 271-280页

作者： Qing Xia Rui Liu Xueqin Chen Zixuan Chen jun-jie zhu State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023P.R.China Shenzhen Research Institute of Nanjing University Shenzhen 518000P.R.China

Metal nanomaterials can facilitate microbial extracellular electron transfer(EET)in the electrochemically active ***,the role of nanomaterials/bacteria interaction in this process is still ***,we reported the single-cell voltammetric imaging of Shewanella oneidensis MR-1 at the single-cell level to elucidate the metal-enhanced EET mechanism in vivo by the Fermi level-responsive graphene *** oxidation currents of~20 fA were observed from single native cells and gold nanoparticle(AuNP)-coated cells in linear sweep voltammetry *** the contrary,the oxidation potential was reduced by up to 100 mV after AuNP *** revealed the mechanism of AuNP-catalyzed direct EET decreasing the oxidation barrier between the outer membrane cytochromes and the *** method offered a promising strategy to understand the nanomaterials/bacteria interaction and guide the rational construction of EET-related microbial fuel cells.

关键词： Fermi voltammetry Electron

Advances of Electrochemical and Electrochemiluminescent Sensors Based on Covalent Organic Frameworks

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Nano-Micro Letters 2024年第2期16卷 395-422页

作者： Yue Cao Ru Wu Yan‑Yan Gao Yang Zhou jun‑jie zhu Key Laboratory for Organic Electronics and Information Displays(KLOEID)and Institute of Advanced Materials(IAM) Nanjing University of Posts and Telecommunications(NJUPT)Nanjing 210023People’s Republic of China State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023People’s Republic of China

Covalent organic frameworks(COFs),a rapidly developing category of crystalline conjugated organic polymers,possess highly ordered structures,large specific surface areas,stable chemical properties,and tunable pore *** the first report of boroxine/boronate ester-linked COFs in 2005,COFs have rapidly gained popularity,showing important application prospects in various fields,such as sensing,catalysis,separation,and energy *** them,COFs-based electrochemical(EC)sensors with upgraded analytical performance are arousing extensive *** this review,therefore,we summarize the basic properties and the general synthesis methods of COFs used in the field of electroanalytical chemistry,with special emphasis on their usages in the fabrication of chemical sensors,ions sensors,immunosensors,and ***,the emerged COFs in the electrochemiluminescence(ECL)realm are thoroughly covered along with their preliminary ***,final conclusions on state-of-the-art COFs are provided in terms of EC and ECL sensors,as well as challenges and prospects for extending and improving the research and applications of COFs in electroanalytical chemistry.

关键词： Covalent organic frameworks Electrochemistry Electrochemiluminescence Sensors

Lipid concentration and composition in xylem sap of woody angiosperms from a tropical savanna and a seasonal rainforest

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Plant Diversity 2024年第1期46卷 126-133页

作者： Ling-Bo Huang Xinyi Guan Amy Ny Aina Aritsara jun-jie zhu Steven Jansen Kun-Fang Cao State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources Guangxi Key Laboratory of Forest Ecology and ConservationGuangxi UniversityDaxuedong Road 100NanningGuangxi 530004China Institute of Botany Ulm UniversityAlbert-Einstein-Allee 11Ulm89081Germany

Lipids may play an important role in preventing gas embolisms by coating nanobubbles in xylem *** studies on xylem sap lipids have been reported for temperate plants,and it remain unclear whether sap lipids have adaptational significance in tropical *** this study,we quantify the lipid composition of xylem sap for angiosperm species from a tropical savanna(seven species)and a seasonal rainforest(five species)using mass *** found that all twelve species studied contained lipids in their xylem sap,including galactolipids,phospholipids and triacylglycerol,with a total lipid concentration ranging from 0.09 to 0.26 nmol/*** was no difference in lipid concentration or composition between plants from the two sites,and the lipid concentration was negatively related to species’open vessel ***,savanna species showed little variation in lipid composition between the dry and the rainy *** results support the hypothesis that xylem sap lipids are derived from the cytoplasm of individual conduit cells,remain trapped inside individual conduits,and undergo few changes in composition over consecutive seasons.A xylem sap lipidomic data set,which includes 12 tropical tree species from this study and 11 temperate tree species from literature,revealed no phylogenetic signals in lipid composition for these *** study fills a knowledge gap in the lipid content of xylem sap in tropical trees and provides additional support for their common distribution in xylem sap of woody *** appears that xylem sap lipids have no adaptive significance.

关键词： Xylem sap Lipids Tropical savanna Tropical rainforest Vessels

Deep-Red to Near-Infrared Carbon Dots in Biosensing and Bio-medical Applications

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Chinese Journal of Chemistry 2023年第18期41卷 2354-2370页

作者： Shan Huang Li Yan Xiaojun Chen jun-jie zhu Schoolof Chemistry and Molecular Engineering Nanjing TechUniversityNanjingJiangsu 211816China Schoolof Chemistry and chemical Engineering Nanjing UniversityNanjingJiangsu 210023China

Comprehensive Summary,With the rapid development in the field of biomedical diagnosis and treatment,carbon dots(CDs)with favorable photostability,biocompatibility and high quantum yields for deep-red to near-infrared emission have attracted the attention of a majority of *** enlarging the sp2 domain in the core of CDs,doping them with heteroatoms like nitrogen and sulfur,applying hydrothermal,electrochemical,or microwave-assisted techniques,CDs can be made with the aforementioned photoemission *** view of these excellent properties,CDs are flourishing in biosensing and biomedical applications,so that a thorough description and discussion of this topic is beneficial to capture the up-to-date progress of CDs in this field,providing suggestions and considerations for readers.

关键词： Carbon dots Biosensing Biomedical Biotechnology Cancer therapy Antibacterial

DNA functionalized plasmonic nanoassemblies as SERS sensors for environmental analysis

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聚集体(英文)

聚集体(英文) 2023年第2期4卷 62-82页

作者： Jinxiang Li Xueqin Chen jun-jie zhu School of Chemistry and Chemical Engineering Nanjing UniversityNanjingPR China

Surface-enhanced Raman scattering(SERS)is among the most widely applied analytical techniques due to its easy execution and extreme *** molecules can be detected and distinguished based upon the fingerprint spectra that arise when absorbed on the SERS substrates surface,particularly on the SERS-active ***,rational fabricating the enhancing substrates plays a key role in broadening SERS *** DNA functionalized plasmonic nanoassemblies,where DNA acts as both structure basis and functional unit,combine the specificity of DNA recognition,and modulate the assembly of plasmonic nanoparticles(NPs).Specifically designed DNA not only improves the selectivity to target molecules but also promotes the sensitivity of the optical signals through precisely regulating the distance between the molecule and the substrate.A variety of DNA-functionalized SERS sensors have been reported and obtained well performance in the analysis of heavy metal ions in water,toxins,pesticide residues,antibiotics,hormones,illicit drugs,or other small *** review places an emphasis on the design and sensing strategies of the DNA-functionalized plasmonic nanoassemblies,as well as basic principles of Raman enhancement,and recent advances for environmental *** current challenges and potential trends in the development of DNAfunctionalized SERS sensors for environmental pollutant monitoring in complicated scenarios are subsequently discussed.

关键词： assemblies DNA environmental analysis nanostructures SERS

Aqueous-phase synthesis of upconversion metal-organic frameworks for ATP-responsive in situ imaging and targeted combinational cancer therapy

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Chinese Chemical Letters 2022年第1期33卷 314-319页

作者： Lin Yang Shuaidong zhu Zhimei He Xiangli Li Jiangning Chen Sai Bi jun-jie zhu State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringSchool of Life SciencesNanjing UniversityNanjing 210023China College of Chemistry and Chemical Engineering Qingdao UniversityQingdao 266071China

Herein,the nanoscaled ATP-responsive upconversion metal-organic frameworks(UCMOFs)are aqueousphase synthesized for co-delivery of therapeutic protein cytochrome c(Cyt c)and chemodrugs doxorubicin(DOX),achieving targeted combinational therapy of human cervical *** UCMOFs are rationally fabricated by growing ZIF-90 on mesoporous silica-coated upconversion nanoparticles(UCNPs),in which the ZIF-90 layer attenuates the upconversion luminescence(UCL)and the rigid frameworks increase the stability of encapsulated *** the UCMOF@DOX/Cyt c are internalized into HeLa cells via specific recognition of sgc8 aptamers,the intracellular ATP triggers the dissolution of ZIF-90 into Zn^(2+),which facilitates not only the release of Cyt c and DOX but also the restoration of UCL for real-time monitoring of drug *** has been demonstrated that the therapeutic efficacy is greatly improved by the combination of caspase-mediated apoptosis activated by Cyt c(protein therapeutics),DNA fragmentation induced by DOX(chemotherapy),and Zn;-promoted generation of reactive oxygen species(ROS)(oxidative stress).Overall,our proposed multifunctional UCMOFs provide an effective platform for targeted combinational cancer therapy and in situ imaging,which hold great promise in biomedical and clinical applications.

关键词： Upconversion nanoparticles Metal-organic frameworks ATP response In situ imaging Targeted combinational therapy

Live microalgal cells modified by L-cys/Au@carbon dots/bilirubin oxidase layers for enhanced oxygen reduction in a membrane-less biofuel cell

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SmartMat 2022年第2期3卷 298-310页

作者： Sili Qing Lin-Lin Wang Li-Ping Jiang Xiaoge Wu jun-jie zhu State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjingChina Environment Science and Engineering College Yangzhou UniversityYangzhouChina

Electrochemical oxygen reduced reaction(ORR)is a critical element in clean energy *** efforts to enhance gas transfer to the reaction interface,the low solubility of O_(2)molecules and slow diffusion rate in liquid electrolyte is still a significant ***,we design an artificial outer membrane on microalgal cells,which consists of a carbon dots/bilirubin oxidase(CDs/BOD)ORR catalyst layer and a L-cystine/Au nanoporous O_(2)supply layer.O_(2)generated by photosynthesis from microalgal cells then can be directly transported to the CDs/BOD catalytic interfaces,overcoming the sluggish gas transfer in the ***,the cathode constructed by the fabricated microalgal cells realizes an ORR current density of 655.2μA/cm^(2) with fast ORR kinetics,which is 2.68 times higher than that of a BOD cathode fed with pure O_(2).A membrane-less glucose/O_(2)biofuel cell is further developed using the hybrid artificial cells as the cathode,and the power density is 2.39 times higher than that of a BOD cathode biofuel cell in O_(2)saturated *** biomimetic design supplies O_(2)directly to the carbon dots/BOD catalyst layer from the microalgae membrane through a nanoporous L-cys/Au layer,providing an alternative solution for the transfer barrier of O_(2)in the electrolyte.

关键词： biofuel cells carbon dots microalgal cells O_(2)supply in situ

Spray pyrolysis-derived W-doped MoSe2/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 Technology School of Chemistry and Chemical Engineering Hunan Institute of Science and Technology Hunan Province Key Laboratory of Materials Surface & Interface Science and Technology Material Science and Engineering SchoolCentral South University of Forestry and Technology International Iberian Nanotechnology Laboratory (INL)

Two-dimensional MoSe2is a promising candidate for lithium-ion battery ***,its conductivity and lithium storage volumetric effect still need to be *** this work,W-doped MoSe2/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 MoSe2and 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 MoSe2（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 MoSe2/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-1after 300 cycles at a current density of 1 A·g-1.

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

Preparation of vanadium-based electrode materials and their research progress in solid-state flexible supercapacitors

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Rare Metals 2024年第2期43卷 431-454页

作者： Rui-jie zhu Jiang Liu Chao Hua Hao-Yu Pan Yi-jun Cao Meng Li Zhongyuan Critical Metals Laboratory Zhengzhou UniversityZhengzhou450001China School of Chemical Engineering Zhengzhou UniversityZhengzhou450001China

Solid-state flexible supercapacitors(SCs)have many advantages of high specific capacitance,excellent flexibility,fast charging and discharging,high power density,environmental friendliness,high safety,light weight,ductility,and long cycle *** are the ideal choice for the development of flexible energy storage technology in the future,and provide a good prospect for energy storage *** present,solid-state flexible SCs are widely used for portable electronic equipment and wearable energy storage equipment,the research of them has become the focus of a growing number of *** material is the key part of SCs and always determines the electrochemical performance of *** has been a hotspot and focus of ***-based compounds are considered to be a promising electrode material for SCs because of variable valence,open structure,high theoretical capacity,and low ***,this study first gives an overview of solid-state flexible SCs,then reviews the current research status of vanadium-based electrode materials in solid-state flexible SCs,and proposes some strategies to solve some problems of vanadium-based electrode materials.

关键词： Vanadium-based materials Flexible energy storage Specific capacitance Supercapacitors(SCs)

Sonochemical Synthesis of Two Dimensional C3N4 Nanosheets Supported Palladium Composites and Their Electrocatalytic Activity for Oxygen Reduction and Methanol Oxidation Reaction

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Chinese Journal of Chemistry 2017年第6期35卷 969-976页

作者： Lingxia Zuo Liping Jiang jun-jie zhu State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical Engineering Nanjing University Nanjing Jiangsu 210093 China

The preparation of highly active electrocatalysts with good durability and low cost for fuel cells is highly desir- able but still remains a significant challenge. Here we synthesized two dimensional （2D） C3N4 nanosheets supported palladium composites （C3N4/Pd） via a simple and convenient sonochemical approach. We have systematically stud- ied the electrocatalytic performance of as-prepared catalysts. We found that the prepared C3N4/Pd composites pos- sessed excellent catalytic activity and stability for oxygen reduction reaction （ORR） in alkaline media. Encourag- ingly, the C3N4/Pd catalysts exhibit the excellent electrocatalytic activity for methanol oxidation reaction （MOR） in alkaline media, even better than that of the commercial Pt/C catalyst, The excellent electrocatalytic performance of the 2D C3N4 nanosheets supported palladium composites catalysts results from their synergy effect between the ul- trathin substrate material with large surface area and excellent dispersion of palladium nanoparticles. This study demonstrates that sonochemical method opens up a new avenue for the preparation of electrocatalysts for fuel cells. We expect these materials are likely to find uses in a broad range of applications, for example, fuel cells, solar cells, batteries and other electrochemical analysis.

关键词： sonochemical method C3N4/Pd oxygen reduction reaction methanol oxidation reaction