检索结果-南通市图书馆

Three-dimensional biogenic C-doped Bi_2MoO_6/In_2O_3-ZnO Z-scheme heterojunctions derived from a layered precursor

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2019年第5期31卷 54-66页

作者： hongyan li Jia li Ping Yang dickon h.l.ng Xinling Cui Fei Ji School of Material Science and Engineering University of Jinan Department of Physics The Chinese University of Hong Kong

Novel 3D biogenic C-doped Bi_2 MoO_6/In_2O_3-ZnO Z-scheme heterojunctions were synthesized for the first time, using cotton fiber as template. The as-prepared samples showed excellent adsorption and photodegradation performance toward the hazardous antibiotic doxycycline under simulated sunlight irradiation. The morphology, phase composition and in situ carbon doping could be precisely controlled by adjusting processing parameters. The carbon doping in Bi_2 MoO_6/In_2O_3-ZnO was derived from the cotton template, and the carbon content could be varied in the range 0.9–4.4 wt.% via controlling the heat treatment temperature. The sample with Bi_2 MoO_6/In_2O_3-ZnO molar ratio of 1:2 and carbon content of1.1 wt.% exhibited the highest photocatalytic activity toward doxycycline degradation,which was 3.6 and 4.3 times higher than those of pure Bi_2 MoO_6 and Zn In Al-ClDh(calcined layered double hydroxides), respectively. It is believed that the Z-scheme heterojunction with C-doping, the 3D hierarchically micro–meso–macro porous structure, as well as the high adsorption capacity, contributed significantly to the enhanced photocatalytic activity.

关键词： Biotemplate Bi2MoO6 ZnInAl-layered double hydroxides (lDh) Adsorption Photocatalysis

liFePO_(4)and liMn_(2)O_(4)nanocomposite coating of liNi_(0.815)Co_(0.15)Al_(0.035)O_(2)cathode material for high-performance lithium-ion battery

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第8期41卷 2560-2566页

作者： Zi-Wei lan Jian-Ru Zhang Yuan-Yuan li Ru-heng Xi Yong-Xiang Yuan lei Zhao Xiao-Yi hou Jia-Tai Wang dickon h.l.ng Cai-hong Zhang College of Physics and Electronic Information Engineering Qinghai Normal UniversityXining810008China Department of Physical Science and Technology Lingnan Normal UniversityZhanjiang524048China Department of Physics The Chinese University of Hong KongHong Kong999077China

To solve the multiple problems of low ionic conductivity,fast capacity decay,and poor cycling performance of Nirich layered cathode materials,liNi_(0.815)Co_(0.15)Al_(0.035)O_(2)@liFePO_(4)@liMn_(2)O_(4)(NCA@lFP@lMO,abbreviated as AFM)series cathode materials with different coating ratios were synthesized by a two-step ball milling method and precise control of the mass coating ratio of lFP and lMO.The cathode material of NCA,lFP and lMO with a mass ratio of 8:1:1(A_(8)F_(1)M_(1))presents a more desirable nanocomposite coating and still can deliver a discharge capacity of 151.67 mAh·g^(-1)(with a 94.52%capacity retention)after 200 cycles at 1.0 C.Furthermore.

关键词： coating cycling performance

Nitrogen-doped porous carbon nanofoams with enhanced electrochemical kinetics for superior sodium-ion capacitor

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2022年第7期41卷 2481-2490页

作者： K.Ramachandran Gokila Subburam Xian-hu liu Ming-Gang huang Chun Xu dickon h.l.ng Ying-Xue Cui Guo-Chun li Jing-Xia Qiu Chuan Wang Jia-Biao lian Institute for Energy Research Jiangsu UniversityZhenjiang 212013China Key laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China Key laboratory of Fine Chemical Application Technology of luzhou Luzhou 646099China Department of Physics The Chinese University of Hong KongHong Kong 999077China Jiangsu National Synergetic Innovation Center for Advanced Materials School of Chemistry and Molecular EngineeringInstitute of Advanced SynthesisNanjing Technology UniversityNanjing 211800China

Many electrochemical energy storage devices,such as batteries,supercapacitors,and metal ion capacitors,rely on effective and inexpensive electrode materials.herein,we have developed highly active nitrogen-doped porous carbon nanofoams(NPCNs-600-N)for sodium-ion capacitors(SICs).NPCNs-600-N have a highly porous framework,extended interlayer spacing(0.41 nm),and lots of surface functional groups.Accordingly,NPCNs-600-N achieves a high reversible capacity(301 mAh·g^(-1)at 0.05 A·g^(-1)),superior rate capability(112 mAh·g^(-1)at 5.00 A·g^(-1)),and ultra-stable cyclability.The excellent rate and cycling performance originate from the abundant active sites and porous architecture of NPCNs-600-N.Further-more,SICs device is constructed by employing the NPCNs-600-N as the battery-like anode and commercial superconductive carbon black as the capacitive cathode,which delivers high energy/power densities of 92 Wh·kg^(-1)/15984 W·kg^(-1)with a remarkable cyclability(93%reten-tion over 5000 cycles at 1.00 A·g^(-1)).The methodology of the work enables the simultaneous tuning of the porous architectures and surface function groups of carbon for high-performance SICs.

关键词： Carbon nanofoams Nitrogen-doping Porous structure Kinetics analysis Sodium-ion capacitors

Effect of homojunction structure in boosting sodium-ion storage: The case of MoO_(2)

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第3期78卷 115-122,I0004页

作者： Sheng li Wei Zhang Yingxue Cui Jianmin Ma hong-Jie Peng Jun li Xianhu liu dickon hlng Xinyan liu Jiabiao lian Institute for Energy Research Jiangsu UniversityZhenjiang 212013JiangsuChina School of Physics and Electronics Hunan UniversityChangsha 410082HunanChina Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina Key laboratory of Materials Processing&Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002HenanChina School of Science and Engineering The Chinese University of Hong Kong(Shenzhen)LonggangShenzhen 518172GuangdongChina

high-efficiency sodium-ion batteries(SIBs) are in great demand for energy storage applications,which are dominated by the Na+storage performance of electrode materials.here,a one-pot solvothermal method is developed to construct amorphous/crystalline MoO_(2)(a/c-MoO_(2)) homojunction for boosting Na+storage.Theoretical simulations signify that electrons redistribute at the homogenous interface of a/c-MoO_(2),resulting in an inbuilt driving force to easily adsorb charge carriers and promote the electron/ion transfer ability.Relying on its crystallographic superiorities,the a/c-MoO_(2)homojunction with high Na adsorbability(-1.61 eV) and low Na diffusion energy barrier(0.519 eV) achieves higher capacity(307 mA h g^(-1)at 0.1 A/g),better rate capability and cycling stability than either a-MoO_(2)or c-MoO_(2)counterpart.Combining in-situ X-ray diffraction(XRD) and ex-situ X-ray photoelectron spectroscopy(XPS)techniques,the ’adsorption-insertion-conversion’ mechanism is well established for Na+storage of MoO_(2).Our work opens new opportunities to optimize electrode materials via crystallographic engineering for efficient Na+storage,and helps to better understand the effects of homojunction structure in enhanced electrochemical performance.

关键词： MoO_(2)homojunction Crystallographic engineering Theoretical calculations In-situ XRD Na^(+)storage mechanism

Dysfunction of synaptic endocytic trafficking in Parkinson's disease

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第12期19卷 2649-2660页

作者： Xin Yi ng Mian Cao Programme in Neuroscience and Behavioural Disorders Duke-NUS Medical SchoolSingaporeSingapore Department of Physiology National University of SingaporeSingaporeSingapore

Parkinson's disease is characterized by the selective degeneration of dopamine neurons in the nigrostriatal pathway and dopamine deficiency in the striatum.The precise reasons behind the specific degeneration of these dopamine neurons remain largely elusive.Genetic investigations have identified over 20 causative PARK genes and 90 genomic risk loci associated with both familial and sporadic Parkinson's disease.Notably,several of these genes are linked to the synaptic vesicle recycling process,particularly the clathrinmediated endocytosis pathway.This suggests that impaired synaptic vesicle recycling might represent an early feature of Parkinson's disease,followed by axonal degeneration and the eventual loss of dopamine cell bodies in the midbrain via a"dying back"mechanism.Recently,several new animal and cellular models with Parkinson's disease-linked mutations affecting the endocytic pathway have been created and extensively characterized.These models faithfully recapitulate certain Parkinson's disease-like features at the animal,circuit,and cellular levels,and exhibit defects in synaptic membrane trafficking,further supporting the findings from human genetics and clinical studies.In this review,we will first summarize the cellular and molecular findings from the models of two Parkinson's disease-linked clathrin uncoating proteins:auxilin(DNAJC6/PARK19)and synaptojanin 1(SYNJ1/PARK20).The mouse models carrying these two PARK gene mutations phenocopy each other with specific dopamine terminal pathology and display a potent synergistic effect.Subsequently,we will delve into the involvement of several clathrin-mediated endocytosis-related proteins(GAK,endophilin A1,SAC2/INPP5 F,synaptotagmin-11),identified as Parkinson's disease risk factors through genome-wide association studies,in Parkinson's disease pathogenesis.We will also explore the direct or indirect roles of some common Parkinson's disease-linked proteins(alpha-synuclein(PARK1/4),Parkin(PARK2),and lRRK2(PARK8))in synaptic endocytic trafficking.Additionall

关键词： autophagy auxilin/PARK19 clathrin-mediated endocytosis dopamine neurons neurodegeneration nigrostriatal pathway Parkinson's disease synaptic vesicle recycling synaptojanin1/PARK20

Fe_(2)TiO_(5)nanochains as anode for high-performance lithium-ion capacitor

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第9期40卷 2424-2431页

作者： Rong Kang Wang-Qin Zhu Sheng li Bo-Bo Zou liao-liao Wang Guo-Chun li Xian-hu liu dickon h.l.ng Jing-Xia Qiu Yan Zhao Fen Qiao Jia-Biao lian Key laboratory of Zhenjiang Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China Key laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China Department of Physics The Chinese University of Hong KongShatinHong Kong 999077China

The unique crystal structure and multiple redox couples of iron titanate(Fe_(2)TiO_(5)) provide it a high theoretical capacity and good cycling stability when used as an electrode. In this study, the electrospinning method is employed to synthesize one-dimensional(1 D) Fe_(2)TiO_(5) nanochains. The as-prepared Fe_(2)TiO_(5) nanochains exhibited superior specific capacity(500 mAh·g^(-1) at 0.10 A·g^(-1)),excellent rate performance(180 mAh·g^(-1) at 5.00 A·g^(-1)),and good cycling stability(retaining 100% of the initial specific capacity at a current density of 1.00 A·g^(-1) after1000 cycles). The as-assembled Fe_(2)TiO_(5)/SCCB lithiumion capacitor(lIC) also delivered a competitive energy density(137.8 Wh·kg^(-1))andpowerdensity(11,250 W·kg^(-1)). This study proves that the as-fabricated1 D Fe_(2)TiO_(5) nanochains are promising anode materials for high-performance lICs.

关键词： lithium-ion capacitors high energy/power densities Anode material Fe_(2)TiO_(5)nanochains Electrospinning

Stability and Generalization of hypergraph Collaborative Networks

在线全文

学校读者我要写书评

暂无评论

Machine Intelligence Research 2024年第1期21卷 184-196页

作者： Michael K.ng hanrui Wu Andy Yip Institute of Data Science The University of Hong KongHong KongChina Department of Mathematics The University of Hong KongHong KongChina College of Information Science and Technology Jinan UniversityGuangzhou 510006China

Graph neural networks have been shown to be very effective in utilizing pairwise relationships across samples.Recently,there have been several successful proposals to generalize graph neural networks to hypergraph neural networks to exploit more com-plex relationships.In particular,the hypergraph collaborative networks yield superior results compared to other hypergraph neural net-works for various semi-supervised learning tasks.The collaborative network can provide high quality vertex embeddings and hyperedge embeddings together by formulating them as a joint optimization problem and by using their consistency in reconstructing the given hy-pergraph.In this paper,we aim to establish the algorithmic stability of the core layer of the collaborative network and provide generaliz--ation guarantees.The analysis sheds light on the design of hypergraph filters in collaborative networks,for instance,how the data and hypergraph filters should be scaled to achieve uniform stability of the learning process.Some experimental results on real-world datasets are presented to illustrate the theory.

关键词： hypergraphs vertices hyperedges collaborative networks graph convolutional neural networks(CNNs) stability generalization guarantees

Perspectives in human brain plasticity sparked by glioma invasion:from intraoperative(re)mappings to neural reconfigurations

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第5期19卷 947-948页

作者： Sam ng hugues Duffau Guillaume herbet Department of Neurosurgery Gui de Chauliac HospitalMontpellier University Medical CenterMontpellierFrance Institute of Functional Genomics University of MontpellierCNRSINSERMMontpellierFrance Praxiling laboratory UMR5267CNRSPaul Valéry-Montpellier 3 UniversityMontpellierFrance

Exploring the aptitude of the human brain to compensate functional consequences of a lesion damaging its structural architecture is a key challenge to improve patient care in various neurological diseases,to optimize neuroscientifically-informed strategies of postlesional rehabilitation,and ultimately to develop innovative neuro-regenerative therapies.The term‘plasticity’,initially referring to the intrinsic propensity of neurons to modulate their synaptic transmission in a learning situation,was progressively transposed to brain injury research and clinical neurosciences.Indeed,in the event of brain damage,adaptive mechanisms of compensation allow a partial reshaping of the structure and activities of the central nervous system,thus permitting to some extent the maintenance of brain functions.

关键词： plasticity figuration consequences

Defined hydrogels for spinal cord organoids:challenges and potential applications

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2024年第11期19卷 2329-2330页

作者： Wai hon Chooi Yuewen Wu Shi-Yan ng Institute of Molecular and Cell Biology(IMCB) Agency for ScienceTechnology and Research(A*STAR)SingaporeSingapore Department of Physiology Yong Loo Lin School of MedicineNational University of Singapore(NUS)SingaporeSingapore

Organoids of the central nervous system,primarily derived from pluripotent stem cells or neural stem cells,are three-dimensional tissue cultures with self-organizing properties.When exposed to the right combinations of signals,they differentiate into a 3D tissue consisting of complex cytoarchitecture and native cell types,including various neuron subtypes and glial cells.These features closely mimic native tissues,making them invaluable for developmental studies and disease modeling.In recent years,spinal cord organoids(SCOs)have been developed to investigate spinal cord development,injuries,and various neurological disorders.As an integral part of the central nervous system,SCOs play a vital role and serve as a site for studying both neurodevelopment and neurodegenerative diseases.

关键词： properties injuries primarily