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Electrochemical energy storage application of CuO/CuO@Ni-CoMoO4·0.75H2O nanobelt arrays grown directly on Cu foam

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Progress in Natural Science:Materials International 2022年第2期32卷 163-170页

作者： Bingbing Zhang qian liu Kaibing Xu Rujia Zou Chunrui Wang Department of Physics Donghua University Research Center for Analysis and Measurement Donghua University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University

Supercapacitors are attracting huge research interest because they are expected to achieve battery-level energy density,and they have a longer calendar life and shorter charging ***,due to the out shell materials without contact extra freeway for charge transports,the out shell materials have still limited contribution to high capacitance for array structure at high ***,CO/CO@Ni-CMO NBs were designed and synthesized on Cu foam substrates with CuO NBs as cores or extra freeway and Ni-CoMoO4·0.75 H2O nanobelt as shell by an easily synthetic *** NBs will provide electron "superhighways" and extra outside freeway for charge storage and ***,the Ni doped CoMoO4·0.75 H2O NBs are conducive to the electrical conductivity,and open space among these nanosheets can act as an "ion reservoir",the increment of active sites and the contribution of capacitive ***,the CO@Ni-CMO NBs directly grown on Cu foam could avoid the "dead" volume caused by the tedious process of mixing active materials with polymer binders/conductive *** expected,the CO/CO@Ni-CMO NBs exhibited the high specific capacitance,the good rate performance and the excellent electrochemical stability.

关键词： CuO/ [email protected] –CoMoO 4 ·0.75H 2 O Nanobelt arrays Multipath transfer electrons High specific capacitance Cyclic stability

Engineered biocontainable RNA virus vectors for non-transgenic genome editing across crop species and genotypes

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Molecular Plant 2023年第3期16卷 616-631页

作者： qian liu Chenglu Zhao Kai Sun Yinlu Deng Zhenghe Li State Key Laboratory of Rice Biology Institute of BiotechnologyZhejang UniversityHangzhouChina Ministry of Agricutture Key Laboratory of Molecular Biology of Crop Pathogens and Insect Pests Zhejiang UniversityHangzhouChina Key Laboratory of Biology of Crop Pathogens and Insects of Zhejang Province Zhejang UniversityHangzhouChina

CRISPR/Cas genome-editing tools provide unprecedented opportunities for basic plant biology research and crop ***,the lack of robust delivery methods has limited the widespread adoption of these revolutionary technologies in plant ***,we report an efficient,non-transgenic CRISPR/Cas delivery platform based on the engineered tomato spotted wilt virus(TSWV),an RNA virus with a host range of over 1000 plant *** eliminated viral elements essential for insect transmission to liberate genome space for accommodating large genetic cargoes without sacrificing the ability to infect plant *** resulting non-insect-transmissible viral vectors enabled effective and stable in planta delivery of Cas12a and Cas9 nucleases as well as adenine and cytosine base *** systemically infected plant tissues,the deconstructed TSWV-derived vectors induced efficient somatic gene mutations and base conversions in multiple crop species with little genotype *** with heritable,bi-allelic mutations could be readily regenerated by culturing the virus-infected tissues in vitro without antibiotic ***,we showed that antiviral treatment with ribavirin during tissue culture cleared the viral vectors in 100%of regenerated plants and further augmented the recovery of heritable *** many plants are recalcitrant to stable transformation,the viral delivery system developed in this work provides a promising tool to overcome gene delivery bottlenecks for genome editing in various crop species and elite varieties.

关键词： genome editing CRISPR-Cas base editor RNA virus vector tomato spotted wilt virus bunyavirus delivery non-transgenic

Direct growth of globally aligned graphene nanoribbons on reconstructed sapphire substrate using PECVD

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Nano Research 2023年第1期16卷 62-69页

作者： Mingzhi Zou Weiming liu Yue Yu Shanshan Wang Bo Xu liu qian Tianze Tong Jin Zhang College of Chemistry and Molecular Engineering Beijing Science and Engineering Center for NanocarbonsBeijing National Laboratory for Molecular SciencesPeking UniversityBeijing 100871China Science and Technology on Advanced Ceramic Fibers and Composites Laboratory College of Aerospace Science and EngineeringNational University of Defense TechnologyChangsha 410000China

Graphene nanoribbons(GNRs)are regarded as an ideal candidate for beyond-silicon ***,synthesis of aligned GNR arrays on insulating substrates with high efficiency is *** this work,we develop a facile strategy,involving KOH pre-treatment and high-temperature annealing,to construct parallel steps on the two-fold symmetry a-plane sapphire *** GNRs as narrow as 15.1 nm with global alignment across a region of 20 mm^(2)are then grown on the step edgeenriched substrate through plasma enhanced chemical vapor deposition(PECVD)*** align well along the atomic steps on sapphire([■]direction)with their widths and densities swiftly adjustable by step morphology modification on substrate surface.A step-edge confined growth mechanism is proposed,attributing the constraint on the nanoribbon broadening to a relatively low growth temperature in PECVD,which restrains the activation energy to suppress GNRs across step edges on sapphire and prevents detrimental nanoribbon *** results provide a new perspective for scalable synthesizing well aligned nanoribbons of other two-dimensional materials.

关键词： graphene nanoribbon(GNR) global alignment sapphire insulating substrates plasma enhanced chemical vapor deposition(PECVD)

3D Distinct Element Back Analysis Based on Rock Structure Modelling of SfM Point Clouds:The Case of the 2019 Pinglu Rockfall of Kaili,China

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Journal of Earth Science 2024年第5期35卷 1568-1582页

作者： Zhen Ye qiang Xu qian liu Xiujun Dong Feng Pu State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of TechnologyChengdu 610059China Institute of Applied Geosciences Graz University of TechnologyGraz 8010Austria

This paper introduces the use of point cloud processing for extracting 3D rock structure and the 3DEC-related reconstruction of slope failure,based on a case study of the 2019 Pinglu *** basic processing procedure involves:(1)computing the point normal for HSV-rendering of point cloud;(2)automatically clustering the discontinuity sets;(3)extracting the set-based point clouds;(4)estimating of set-based mean orientation,spacing,and persistence;(5)identifying the block-forming arrays of discontinuity sets for the assessment of *** effectiveness of our rock structure processing has been proved by 3D distinct element back *** results show that Sf M modelling and rock structure computing provides enormous cost,time and safety incentives in standard engineering practice.

关键词： unmanned aerial vehicle(UAV) 3D point cloud rock structure karst discontinuity sets engineeringgeology

Rational design of dual sites induced local electron rearrangement for enhanced photocatalytic oxygen activation

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Chinese Chemical Letters 2024年第11期35卷 232-237页

作者： Ruru Li qian liu Hui Li Fengbin Sun Zhurui Shen School of Materials Science and Engineering Nankai UniversityTianjin 300350China Weather Modification Centre China Meteorological AdministrationBeijing 100081China

Efficient activation of molecular oxygen(O_(2))is considered a promising technique for the removal of ***,how to effectively regulate electrons distribution to promote O_(2)activation remains a challenge at *** this study,phosphorus and sodium co-doped carbon nitride(PNaCN)were designed to rearrange the electrons distribution to activate O_(2)for the degradation of *** generation of·O_(2)~-was innovatively observed via in-situ O_(2)fitting Fourier transform infrared(FTIR)spectroscopy,demonstrating the outstanding O_(2)activation ability of *** functional theory(DFT)further confirmed that the rational co-doping led to the rearrangement of local electrons,resulting in electron-rich Na sites and electron-deficient P *** sites exhibited greater susceptibility to O_(2)adsorption and charge ***,the degradation rate of tetracycline was increased by 2.44 times using co-doped *** study provides a new inspiration for enhancing O_(2)activation by inducing electrons rearrangement.

关键词： Electrons rearrangement Co-doping O_(2)activation Photocatalysis Tetracycline degradation

Two-dimensional g-C_(3)N_(4)nanosheets-based photo-catalysts for typical sustainable processes

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Chinese Chemical Letters 2023年第11期34卷 63-73页

作者： Xiaodong Zhao qian liu Xiaolei Li Huiming Ji Zhurui Shen Key Laboratory of Advanced Ceramics and Machining Technology Ministry of EducationSchool of Materials Science and EngineeringTianjin UniversityTianjin 300072China School of Materials Science and Engineering Nankai UniversityTianjin 300350China

Graphitic carbon nitride(g-C_(3)N_(4))has been widely studied as a visible light responsive photocatalyst in recent years,due to its facile synthesis,low cost,high stability,and appropriate bandgap/band *** this review,we firstly introduce and compare various exfoliation approaches of bulk g-C_(3)N_(4)into ultrathin g-C_(3)N_(4)***,many modification strategies of g-C_(3)N_(4)nanosheets are also reviewed,including heterojunction construction,doping,defect control,and structure ***,the charge transfer mechanism in g-C_(3)N_(4)nanosheets based heterojunctions is present,e.g.,Z-scheme,S-scheme and other ***,the photocatalytic applications of g-C_(3)N_(4)nanosheets based photocatalysts are summarized including environmental remediation,energy generation and storage,organic synthesis,and *** review ends with a summary and some perspectives on the challenges and new directions in exploring g-C_(3)N_(4)nanosheets-based photocatalysts.

关键词： Graphitic carbon nitride(g-C_(3)N_(4)) nanosheets Exfoliation approaches Hetero-junction Z-scheme mechanism Photo-catalytic applications

Review on Renewable Energy Source Fault Characteristics Analysis

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 963-972页

作者： Tianshu Bi Bin Yang Ke Jia Liming Zheng qian liu Qixun Yang School of Electrical and Electronic Engineering North China Electric Power UniversityBeijing 102206China

The increase of renewable energy sources(RESs),especially wind power and photovoltaic,is bringing different fault features to the power system compared with the traditional syn-chronous generator,resulting in the urgent need for precise fault *** to the sequentially activated fault features,the short circuit characteristics of RES can be divided into three fault *** the staged framework of fault duration,the published research is reviewed to provide a systematic analysis of RES fault ***'s concluded that the hardware parameter determines the sub-transient fault features of RES,whereas RES control begins to dominate during the following transient ***,the neglection of voltage transition and unavailable RES output phase shall impede the application of the analytical conclusions in protection *** solve the existing problems,interaction among RES and networks must be figured ***,the fault calculation of the integral RES-grid system is offered as the research prospect.

关键词： Fault characteristics analysis fault stages renewable energy sources

Amorphous Electrode:From Synthesis to Electrochemical Energy Storage

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Energy & Environmental Materials 2023年第6期6卷 113-140页

作者： Jiawei Zhang Yu Li Zhen Chen qian liu Qingguo Chen Minghua Chen School of Electrical and Electronic Engineering Key Laboratory of Engineering Dielectric and Applications(Ministry of Education)Harbin University of Science and Technology52 Xuefu RoadHarbin 150080China

Electrochemical batteries and supercapacitors are considered ideal rechargeable technologies for next-generation energy storage *** key to further commercial applications of electrochemical energy storage devices is the design and investigation of electrode materials with high energy density and significant cycling ***,amorphous materials have attracted a lot of attention due to their more defects and structure flexibility,opening up a new way for electrochemical energy *** this perspective,we summarize the recent research regarding amorphous materials for electrochemical energy *** review covers the advantages and features of amorphous materials,the synthesis strategies to prepare amorphous materials,as well as the application and modification of amorphous electrodes in energy storage ***,the challenges and prospective remarks for future development in amorphous materials for electrochemical energy storage are concluded.

关键词： amorphous materials defective energy storage structure flexible

Ultrathin flexible electrospun carbon nanofibers reinforced graphene microgasbags films with three-dimensional conductive network toward synergetic enhanced electromagnetic interference shielding

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Journal of Materials Science & Technology 2022年第16期111卷 57-65页

作者： Likui Zhang Yao Chen qian liu Wenting Deng Yaoqun Yue Fanbin Meng Key Laboratory of Advanced Technologies of Materials(Ministry of Education) School of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China

In recent years,graphene-based composite films have been greatly developed in the field of electromagnetic shielding interference(EMI).However,it is still a huge challenge to prepare graphene-based composite films with excellent mechanical properties,conductivity and electromagnetic shielding *** this work,we adopted a facile and effective method by annealing the alkali-treated polyacrylonitrile(aPAN)nanofibers reinforced graphene oxide(GO)composite films at 2000°C to obtain graphene-carbon nanofibers composite films(GCFs).Microscopically,carbon nanofibers(CNFs)were intercalated into the graphene sheets,and microgasbags structure was formed during the heat treatment *** special structure makes GCFs have superior tensile strength(10.4 MPa)at 5%*** repeated folding over1000 times,the films still demonstrate excellent structural integrity and flexibility ***,the graphene-based composite films with 10 wt%a PAN nanofibers exhibit an extremely low density of about 0.678 g/cm^(3)and excellent electrical conductivity of 1.72×10^(5)S/***,an outstanding electromagnetic shielding effectiveness(SE)of 55–57 d B was achieved,and the corresponding value of the specific SE/thickness can reach 67,601–70,059 d B·cm^(2)/g,which is the highest among reported graphenebased shielding *** significant electromagnetic shielding performance is due to the synergistic enhancement effect brought by the excellent conductivity of carbon nanofibers and graphene,the formed effective conductive network and the microgasbags *** simulation further clarified that the underlying mechanism should be mainly attributed to the conduction loss and multiple reflections caused by the special structure of *** work will provide new solutions for low density,high flexibility and excellent electromagnetic shielding properties materials in the next generation of foldable and wearable electronics.

关键词： Graphene-based composite films Mechanical properties Electromagnetic shielding Electromagnetism simulation Electromagnetic interference shielding mechanism