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Schiff-base polymer derived FeCo-N-doped porous carbon flowers as bifunctional oxygen electrocatalyst for long-life rechargeable zinc-air batteries

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Journal of Energy Chemistry 2023年第1期76卷 470-478,I0012页

作者： Yusong Deng Jiahui Zheng Bei Liu Huaming Li Mei Yang Zhiyu Wang College of Chemistry Xiangtan UniversityXiangtan 411105HunanChina Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education Key Laboratory of Polymeric Materials&Application Technology of Hunan ProvinceKey Laboratory of Advanced Functional Polymeric Materials of College of Hunan ProvinceXiangtan UniversityXiangtan 411105HunanChina State Key Lab of Fine Chemicals Liaoning Key Lab for Energy Materials and Chemical EngineeringPSU-DUT Joint Center for Energy ResearchSchool of Chemical Engineering Dalian University of TechnologyDalian 116024LiaoningChina

Rational design and exploration of low-cost and robust bifunctional oxygen electrocatalysts are vitally important for developing high-performance zinc-air batteries(ZABs).Herein,we reported a facile yet cost-efficient approach to construct a bifunctional oxygen reduction reaction(ORR)/oxygen evolution reaction(OER)electrocatalyst composed of N-doped porous carbon nanosheet flowers decorated with Fe Co nanoparticles(Fe Co/N-CF).Rational design of this catalyst is achieved by designing Schiff-base polymer with unique molecular structure via hydrogen bonding of cyanuramide and terephthalaldehyde polycondensate in the presence of metal *** exhibits excellent activity and stability for electrocatalysis of ORR/OER,enabling ZAB with a high peak power density of 172 m W cm^(-2)and a large specific capacity of 811 m A h g^(-1)Znat large *** rechargeable ZAB demonstrates excellent durability for 1000 h with slight voltage decay,far outperforming a couple of precious Pt/Ir-based *** functional theory(DFT)calculations reveal that high activity of bimetallic Fe Co stems from enhanced O_(2)and OH-adsorption and accelerated O_(2)dissociation by OAO bond activation.

关键词： Rechargeable zinc-air batteries Oxygen electrocatalyst Schiff-base polymer Bimetallic FeCo N-doped porous carbon

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Carbon encapsulated magnetic nanoparticles produced by hydrothermal reaction

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Chinese Chemical Letters 2007年第4期18卷 487-490页

作者： Nong Yue He Ya Fei Guo Yan Deng Zhi Fei Wang Song Li Hong Na Liu State Key Laboratory of Bioelectronics Southeast University Nanjing 210096 China b Key Laboratory of Green-Packaging and Application of Bionanotechnology of Hunan Province Zhuzhou Institute of Technology Zhuzhou 412008 China

Carbon encapsulated magnetic nanoparticles （CEMNs） were synthesized by heating an aqueous glucose solution containing Fe-Au （Au coated Fe nanoparticles） nanoparticles at 160-180 ℃ for 2 h. This novel hydrothermal approach is not only simple but also provides the surface of CEMNs with functional groups like--OH. The formation of carbon encapsulated magnetic nanoparticles was not favored when using pure Fe nanoparticles as cores because of the oxidation of Fe nanoparticles by 1-120 during the reaction and, therefore, the surfaces of the naked Fe nanoparticles had to be coated by Au shell in advance. TEM, XRD, XPS and VSM measurments characterized that they were uniform carbon spheres containing some embedded Fe-Au nanoparticles, with a saturation of 14.6 emu/g and the size of the typical product is -350 nm.

关键词： Carbon encapsulated magnetic nanoparticles Hydrothermal reaction Gold shell

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Progress in developing self-consolidating concrete(SCC)constituting recycled concrete aggregates:A review

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International Journal of Minerals,Metallurgy and Materials 2021年第4期28卷 522-537页

作者： Yu-Xuan Liu Tung-Chai Ling Kim-Hung Mo Key Laboratory for Green&Advanced Civil Engineering Materials and Application Technology of Hunan Province College of Civil EngineeringHunan UniversityChangsha 410082China Department of Civil Engineering Faculty of EngineeringUniversity of MalayaMalaysia

Recycled concrete aggregate(RCA)derived from demolition waste has been widely explored for use in civil engineering *** of the promising strategies globally is to incorporate RCA into concrete ***,the use of RCA in high-performance concrete,such as self-consolidating concrete(SCC),has only been studied in the past *** paper summarizes recent publications on the use of coarse and/or fine RCA in *** expected,the high-water absorption and porous structure of RCA have posed challenges in producing a high-fluidity *** to an analysis of published data,a lower strength reduction(within 23%regardless of coarse RCA content)is observed in SCC compared with vibrated concrete,possibly due to the higher paste content in the SCC matrix,which enhances the weak surface layer of RCA and interfacial transition ***,SCC tends to become less durable with RCA substitution although the deterioration can be minimized by using treated RCA through removing or strengthening the adhered *** date,the information reported on the role of RCA in the long-term performance of SCC is still limited;thus,a wide range of research is needed to demonstrate the feasibility of RCA–SCC in field applications.

关键词： self-consolidating concrete construction and demolition waste recycled concrete aggregate(RCA) durability property enhancement

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Electrosynthesis of Azobenzenes Directly from Nitrobenzenes

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Chinese Journal of Chemistry 2021年第12期39卷 3334-3338页

作者： Yanfeng Ma Shanghui Wu Shuxin Jiang Fuhong Xiao Guo-Jun Deng Key Laboratory for Green Organic Synthesis and Application of Hunan Province Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of EducationCollege of ChemistryXiangtan UniversityXiangtanHunan 411105China Guangdong Provincial Key Laboratory of Luminescence from Molecular Aggregates(South China University of Technology) GuangzhouGuangdong 510640China

The electrochemical reduction strategy of nitrobenzenes is *** chemistry occurs under ambient *** protocol uses inert electrodes and the solvent,DMSO,plays a dual role as a reducing *** synthetic value has been demons... 详细信息

关键词： Azo compounds Nitro reduction Electrochemistry Nitrobenzenes Green chemistry

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Biowaste derived porous carbon sponge for high performance supercapacitors

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Journal of Materials Science & technology 2021年第36期95卷 105-113页

作者： Wenbin Zhang Bei Liu Mei Yang Yijiang Liu Huaming Li Pingle Liu College of Chemistry Xiangtan UniversityXiangtan 411105China Postdoctoral Station of Chemical Engineering and Technology Xiangtan UniversityXiangtan 411105China Key Laboratory of Polymeric Materials&Application Technology of Hunan Province Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Provinceand Key Lab of Environment-Friendly Chemistry and Application in Ministry of EducationXiangtan UniversityXiangtan 411105China College of Chemical Engineering Xiangtan UniversityXiangtan 411105China

Here,an agricultural waste(the stem pith of helianthus annuus,SPHA)is firstly used as the precursor for preparing three-dimensional(3D)porous carbon sponge(PCS).The as-prepared 3D PCS(SPHA-700)possesses unique sponge-like structure,large specific surface area(SSA)and high nitrogen doping level(4.52 at.%),which benefit the enhancement of conductivity(5.8 S cm;)and *** a binder-free electrode for solid-state symmetric supercapacitor,SPHA-700 delivers a relatively high specific capacitance of137.1 F g^(-1)at 0.5 Ag^(-1).Moreover,activated SPHA-700(SPHA-ac-700–2)displays an even higher specific capacitance(403.6 F g^(-1)at 0.5 Ag^(-1))in 6.0 M KOH *** SPHA-ac-700–2-based symmetrical supercapacitor can offer high specific capacitance(271 F g^(-1)at 1 Ag^(-1))and good rate capability(82.1%of capacitance retention at 1–80 Ag^(-1))in 6.0 M KOH electrolyte,together with high energy density(23.3 Wh kg^(-1)at 450 W kg^(-1))in 1.0 M Na_(2)SO_(4)*** excellent performance of SPHA-ac-700–2 is believed to have originated from the crushed sponge-like structure,O/N-co-doping(10.6 at.%O and3.3 at.%N),high SSA,large total pore volume,and hierarchical pore structure.

关键词： Agricultural waste Carbon sponge Three-dimension Supercapacitors

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Development of Customer Side Electric Safety Perception Module 5

Development of Customer Side Electric Safety Perception Modu...

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5th International Conference on Information Technologies and Electrical Engineering, ICITEE 2022

作者： Xiao, Yu Liu, Xiaoping Xiao, Xiangqi Wu, Wenxian Luo, Yujian Peng, Pei Liu, Hongyu Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology Changsha China

ISBN: (纸本)9781450396806

With the development of power Internet of things, as an important sensing device at the end of the perception layer of the power Internet of things, the technical function of the smart meter is given more requirements;Aiming at the problems of electric shock, fire and other problems that endanger the safety of power grid and personal safety caused by the potential safety hazards of customer-side electricity consumption, improve the safety management ability of customer-side electricity consumption, and support the realization of considerable and controllable safety of customer-side electricity consumption, this paper proposes an electricity safety perception module that meets the technical specifications of the extended module of intelligent internet of things energy meter. © 2022 ACM.

关键词： Internet of things

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Gold Nanoparticle-based Layer-by-Layer Enhancement of DNA Hybridization Electrochemical Signal at Carbon Nanotube Modified Carbon Paste Electrode

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Chinese Chemical Letters 2006年第6期17卷 795-798页

作者： Li Bo NIE Jian Rong CHEN Yu Qing MIAO Nong Yue HE College of Chemistry and Life Science Zhejiang Normal University Jinhua 321004 Key Laboratory of Green-packaging and Application of Bionanotechnology of Hunan Province Hunan University of Technology Zhuzhou 412008 State Key Laboratory of Bioelectronics Southeast University Nanjing 210096

Colloid gold nanoparticle-based layer-by-layer amplification approach was applied to enhance the electrochemical detection sensitivity of DNA hybridization at carbon nanotube modified carbon paste electrodes （CNTPEs）. Streptavidin was immobilized onto the surface of CNTPEs, and the conjugation of biotin labeled target oligonucle,otides to the above immobilized streptavidin was performed, followed by the hybridization of target oligonucleotides with the gold nanoparticle-labeled DNA probe and then the layer-by-layer enhanced connection of gold nanoparticles, on which oligonucleotides complementary to the DNA probe were attached, to the hybridization system. The differential pulse voltammetry （DPV） signal of total gold nanoparticles was monitored. It was found that the layer-by-layer colloidal gold DPV detection enhanced the sensitivity by about one order of magnitude compared with that of one-layer detection. One-base mismatched DNA and complementary DNA could be distinguished clearly.

关键词： Carbon nanotubes carbon paste electrode gold nanoparticles layer-by-layer amplifycation sensitivity.

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Energy Loss Analysis of Distributed Rooftop Photovoltaics in Industrial Parks

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Energy Engineering 2023年第2期120卷 511-527页

作者： Yu Xiao Kai Li HongqiaoHuang Haibo Tan Hua Li State Grid Hunan Electric Power Corporation Limited ChangshaChina Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology ChangshaChina Hunan Institute of Metrology and Inspection ChangshaChina

The analysis of the loss of distributed photovoltaic power generation systems involves the interests of energy users,energy-saving service companies,and power grid companies,so it has always been the focus of the industry and society in some manner or ***,the related analysis for an actual case that considers different cooperative corporations’benefits is lacking in the presently available *** paper takes the distributed rooftop photovoltaic power generation project in an industrial park as the object,studies the analysis and calculation methods of line loss and transformer loss,analyzes the change of transformer loss under different temperatures and different load rates,and compares the data and trend of electricity consumption and power generation in industrial parks before and after the photovoltaic *** paper explores and practices the analysis method of the operating loss of distributed photovoltaic power generation and provides an essential reference for the benefit analysis and investment cost estimation of distributed photovoltaic power generation systems in industrial *** analyzed results reveal that the change loss is stable after the photovoltaic is connected,and there is no additional transformer *** before and after the photovoltaic system installation,there was no significant change in the total monthly data difference between the total meter and the sub-meter.

关键词： Distributed photovoltaic generation line loss transformer loss power generation

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Simultaneous extraction of DNA and RNA from Escherichia coli BL 21 based on silica-coated magnetic nanoparticles

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Science China Chemistry 2015年第11期58卷 1774-1778页

作者： Jiuhai Wang Zeeshan Ali Nianyue Wang Wenbiao Liang Hongna Liu Fu Li Haowen Yang Lei He Libo Nie Nongyue He Zhiyang Li State Key Laboratory of Bioelectronics School of Biological Science and Medical Engineering Southeast University Clinical Laboratory the Second Hospital of Nanjing Jiangsu Province Blood Center Economical Forest Cultivation and Utilization of 2011 Collaborative Innovation Center in Hunan Province Hunan Key Laboratory of Green Packaging and Application of Biological Nanotechnology Hunan University of Technology Department of Laboratory Medicine the Second Affiliated Hospital of Nanjing Medical University

The extraction of nucleic acid is recognized as one of the most essential steps in molecular biology for initiating other downstream applications such as sequencing, amplification, hybridization, and cloning. Many commercial kits and methods are currently available that allow the extraction of only one type of nucleic acids-DNA or RNA. However, in parallel clinical detection of several diseases, a method for simultaneous extraction of both DNA and RNA from the same source is needed in such cases. In this study, a method for simultaneous extraction of DNA and RNA from bacteria based on magnetic nanoparticles(MNPs) was described. Lysis buffers were prepared to help the nucleic acid released and adsorbed to MNPs. Then, two washing buffers were used to remove the contamination of proteins and carbohydrates. The nucleic acids were finally eluted by Deoxyribonuclease(DNase) and Ribonucleases(RNase) free water. Different factors which might affect the purification of the nucleic acid were investigated, and the quantity and quality parameters of the nucleic acid were also recorded. The DNA and RNA extracted from bacteria were then respectively subjected to polymerase chain reaction(PCR) and reverse transcription PCR(RT-PCR) to further confirm its quality. The results indicated that our method can be successfully used to simultaneously extract DNA and RNA from bacteria.

关键词： nucleic acids simultaneous extraction magnetic nanoparticles （MNPs） bacteria

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Synergistic Effect of Alloying Atoms on Intrinsic Stacking-Fault Energy in Austenitic Steels

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Acta Metallurgica Sinica(English Letters) 2017年第3期30卷 272-279页

作者： Ling-Hong Liu Tou-Wen Fan Cui-Lan Wu Pan Xie Ding-Wang Yuan Jiang-Hua Chen Center for High-Resolution Electron Microscopy College of Materials Science and Engineering Hunan UniversityChangsha 410082 China College of Science Central South University of Forestry and Technology Changsha 410004 China Hunan Province Key Laboratory for Spray Deposition Technology and Application Hunan University Changsha 410082 China

Intrinsic stacking-fault energy is a critical parameter influencing the various mechanical performances of aus- tenitic steels with high Mn concentrations. However, quantitative calculations of the stacking-fault energy （SFE） of the face-centered cubic （fcc） Fe, including the changes in concentrations and geometrical distribution of alloying atoms, cannot be obtained by using previous computation models. On the basis of the interaction energy model, we evaluated the effects of a single alloying atom （i.e., Mn, A1, Si, C and N）, as well as its aggregates, including the Mn-X dimer and Mn2-X trimer （X = A1, Si, C and N） on the SFE of the fcc Fe via first-principle calculations. Given low concentrations （〈10 wt%） of alloying atoms, dimers and trimers, theoretical calculations reveal the following：（1） Alloying atom Mn causes a decrease in the SFE, whereas A1, Si, C and N significantly increase the SFE; （2） combination with other alloying atoms to form the Mn-X dimer （X = A1, Si, C and N） exerts an effect on SFE that, to a certain extent, is close to that of the corresponding single X atom; （3） the interaction between Mnz-X and the stacking fault is stronger than that of the corresponding single X atom, inducing a significant increase in the SFE of fcc Fe. The theoretical results we obtained demonstrate that the increase in SFE in high-Mn steel originates from the synergistic effect of Mn and other trace alloy atoms.

关键词： Stacking-fault energy Synergism First-principle calculation Austenitic steel Alloying effect

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