检索结果-南通市图书馆

Oxygen-deficient MoO_(x)/Ni_(3)S_(2) heterostructure grown on nickel foam as efficient and durable self-supported electrocatalysts for hydrogen evolution reaction

引用

Frontiers of Chemical Science and Engineering 2023年第4期17卷 437-448页

作者： Zihuan Yu Haiqing Yan Chaonan Wang Zheng wang Huiqin Yao Rong Liu Cheng Li Shulan Ma Beijing Key Laboratory of Energy Conversion and Storage Materials College of ChemistryBeijing Normal UniversityBeijing 100875China School of Basic Medical Sciences Ningxia Medical UniversityYinchuan 750004China Analytical and Testing Center Beijing Normal UniversityBeijing 100875China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China

High-performance and ultra-durable electrocatalysts are vital for hydrogen evolution reaction(HER)during water splitting.Herein,by one-pot solvothermal method,MoO_(x)/Ni_(3)S_(2) spheres comprising Ni_(3)S_(2) nanoparticles inside and oxygen-deficient amorphous MoO_(x) outside in situ grow on Ni foam(NF),to assembly the heterostructure composites of MoO_(x)/Ni_(3)S_(2)/NF.By adjusting volume ratio of the solvents of ethanol to water,the optimized MoO_(x)/Ni_(3)S_(2)/NF-11 exhibits the best HER performance,requiring an extremely low overpotential of 76 mV to achieve the current density of 10 mA∙cm‒2(η_(10)=76 mV)and an ultra-small Tafel slope of 46 mV∙dec^(-1) in 0.5 mol∙L^(-1) H_(2)SO_(4).More importantly,the catalyst shows prominent high catalytic stability for HER(>100 h).The acid-resistant MoO_(x) wraps the inside Ni_(3)S_(2)/NF to ensure the high stability of the catalyst under acidic conditions.Density functional theory calculations confirm that the existing oxygen vacancy and MoO_(x)/Ni_(3)S_(2) heterostructure are both beneficial to the reduced Gibbs free energy of hydrogen adsorption(|∆G_(H*)|)over Mo sites,which act as main active sites.The heterostructure effectively decreases the formation energy of O vacancy,leading to surface reconstruction of the catalyst,further improving HER performance.The MoO_(x)/Ni_(3)S_(2)/NF is promising to serve as a highly effective and durable electrocatalyst toward HER.

关键词： molybdenum oxides oxygen vacancies heterostructure electrocatalysts hydrogen evolution reaction

来源：

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

Flexible and densified graphene/waterborne polyurethane composite film with thermal conducting property for high performance electromagnetic interference shielding

引用

Nano Research 2022年第11期15卷 9926-9935页

作者： wang Yang Hengxuan Bai Bo Jiang Chaonan Wang Weimin Ye Zhengxuan Li Chong Xu Xiaobai wang Yongfeng Li State Key Laboratory of Heavy Oil Processing China University of PetroleumBeijing 102249China Department of Materials Application Research AVIC Manufacturing Technology InstituteBeijing 100024China

High-performance electromagnetic interference(EMI)shielding materials with flexibility,excellent mechanical property,and thermal conductivity are highly desired for fifth-generation communications devices.Graphene exhibits tremendous potential due to its high electrical conductivity and unique lamellar structure.However,the construction of densified graphene structure in polymer matrix is still challenging.Herein,we develop a graphene/waterborne polyurethane(G/WPU)flexible film with densified and ordered layer-structure for using as an EMI shielding material.By virtue of the polyvinylpyrrolidone modified strategy and facile liquid phase ball-milling treatment,the graphene nanosheets can be efficiently dispersed into the WPU substrate and tightly connected between each other via internal interactions.Benefiting from the relatively low defects and densified structure of graphene,the resultant G/WPU film yields a high electrical conductivity of 1,004.5 S/m,and a tensile strength of around 48.5 MPa.As a consequence,it achieves an average EMI shielding effectiveness of over 30 dB in the X-band with a thickness of merely 0.15 mm and the value is further enhanced to 73.4 dB at 0.9 mm with a low density of 1.4 g/cm^(3),offering over 99.99999%shielding of incident electromagnetic waves.More importantly,this G/WPU film also exhibits a high cross-plane thermal conductivity of about 1.13 W/(m·K).Thus,this work develops a high-performance EMI shielding material with both good capacity of heat transmission,but also provides a facile strategy for designing next-generation advanced,lightweight,flexible,and multifunction shielding materials.

关键词： electromagnetic interference shielding graphene densification flexible thermal conductivity

来源：

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

Selective extinction and habitat nestedness are the main drivers of lizard nestedness in the Zhoushan Archipelago

引用

Current Zoology 2024年第2期70卷 244-252页

作者： Minchu Zhang chaonan Tang Qing Zhang Chengxiu Zhan Chuanwu Chen Yanping wang Laboratory of Island Biogeography and Conservation Biology College of Life SciencesNanjing Normal UniversityNanjing 210023China

Nested subset pattern(nestedness)is an important part of the theoretical framework of island biogeography and community ecology.However,most previous studies often used nestedness metrics or randomization algorithms that are vulnerable to type I error.In this study,we inves-tigated the nestedness of lizard assemblages on 37 islands in the Zhoushan Archipelago,China.We used the line-transect method to survey species occurrence,abundance,and habitat types of lizards on 37 islands during 2 breeding seasons in 2021 and 2022.We applied the nested metric WNODF and the conservative rc null model to control for type I error and quantify the significance of nestedness.Spearman rank cor relations were used to evaluate the role of 4 habitat variables(island area,2 isolation indices,and habitat diversity)and 4 ecological traits(body size,geographic range size,clutch size,and minimum area requirement)in generating nestedness.The results of WNODF analyses showed that lizard assemblages were significantly nested.The habitat-by-site matrix estimated by the program NODF was also significantly nested,support-ing the habitat nestedness hypothesis.The nestedness of lizard assemblages were significantly correlated with island area,habitat diversity.clutch size,and minimum area requirement.Overall,our results suggest that selective extinction and habitat nestedness were the main drivers of lizard nestedness in our system.In contrast,the nestedness of lizard assemblages was not due to passive sampling or selective colonization.To maximize the number of species preserved,our results indicate that we should protect both large islands with diverse habitats and species with largearea requirement and clutch size.

关键词： clutch size habitat nestedness lizards minimum area requirement nestedness selective extinction WNODF Zhoushan Archipelago.

来源：

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

Gold nanorods-mediated efficient synergistic immunotherapy for detection and inhibition of postoperative tumor recurrence

引用

Acta Pharmaceutica Sinica B 2021年第7期11卷 1978-1992页

作者： Yingying Zhang Tiange wang Yu Tian chaonan Zhang Kun Ge Jinchao Zhang Jin Chang Hanjie wang School of Life Sciences Tianjin UniversityTianjin 300072China Tianjin Engineering Center of Micro-Nano Biomaterials and Detection-Treatment Technology Tianjin Key Laboratory of Function and Application of Biological Macromolecular StructuresTianjin 300072China College of Chemistry&Environmental Science Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of EducationChemical Biology Key Laboratory of Hebei ProvinceHebei UniversityBaoding 071002China

Tumor recurrence after surgery is the main cause of treatment failure.However,the initial stage of recurrence is not easy to detect,and it is difficult to cure in the late stage.In order to improve the life quality of postoperative patients,an efficient synergistic immunotherapy was developed to achieve early diagnosis and treatment of post-surgical tumor recurrence,simultaneously.In this paper,two kinds of theranostic agents based on gold nanorods(AuNRs)platform were prepared.AuNRs and quantum dots(QDs)in one agent was used for the detection of carcinoembryonic antigen(CEA),using fluorescence resonance energy transfer(FRET)technology to indicate the occurrence of in situ recurrence,while AuNRs in the other agent was used for photothermal therapy(PTT),together with antiPDL1 mediated immunotherapy to alleviate the process of tumor metastasis.A series of assays indicated that this synergistic immunotherapy could induce tumor cell death and the increased generation of CD3;/CD4;T-lymphocytes and CD3+;CD8;T-lymphocytes.Besides,more immune factors(IL-2,IL-6,and IFN-γ)produced by synergistic immunotherapy were secreted than mono-immunotherapy.This cooperative immunotherapy strategy could be utilized for diagnosis and treatment of postoperative tumor recurrence at the same time,providing a new perspective for basic and clinical research.

关键词： Synergistic immunotherapy Post-surgical tumor recurrence Theranostics Gold nanorods Phototherapy Lung metastasis Fluorescence resonance energy transfer Carcinoembryonic antigen

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A Review on the Pathogenicity of Cucumber Mosaic Virus

引用

Agricultural Biotechnology 2018年第1期7卷 87-91页

作者： Yanhong QIU Chaonan Wang Shuifang ZHU Institute of Plant Quarantine Chinese Academy of Inspection and Quarantine College of Plant Protection China Agricultural University

Cucumber mosaic virus （CMV）, a positive-sense single-stranded RNA virus, has a very wide host range and a worldwide distribution, and is considered as one of the most virulent plant viruses in the world. The CMV gene sequences, gene products, and their interaction with hosts have been extensively reported since it was discovered in 1916. With the development of high-throughput sequencing and proteomics, great progress has been made in the molecular mechanism of CMV pathogenesis in recent years. In this review, we introduce CMV-encoded proteins, CMV-related satellite RNAs and the roles of host factors in the pathogenesis of CMV, to provide a theoretical basis for future study of CMV.

关键词： Cucumber mosaic virus （CMV） Pathogenic mechanism Small interfering RNA Protein-protein interaction

来源：

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

Bibliometric landscape of the researches on protein corona of nanoparticles

引用

Frontiers of Materials Science 2021年第4期15卷 477-493页

作者： Zhengwei HUANG Fangqin FU Linjing WU Wenhao wang Wenhua wang chaonan SHI Ying HUANG Xin PAN Chuanbin WU College of Pharmacy Jinan UniversityGuangzhou 510006China School of Pharmaceutical Sciences Sun Yat-sen UniversityGuangzhou 510006China

Unclear biological fate hampers the clinical translation of nanoparticles for biomedical uses.In recent years,it is documented that the formation of protein corona upon nanoparticles is a critical factor leading to the ambiguous biological fate.Efforts have been made to explore the protein corona forming behaviors on nanoparticles,and rearrangement of the relevant studies will help to understand the current trend of such a topic.In this work,the publications about protein corona of nanoparticles in Science Citation Index Expanded database of Web of Science from 2007 to 2020(1417 in total)were analyzed in detail,and the bibliometrics landscape of them was showcased.The basic bibliometrics characteristics were summarized to provide an overall understanding.Citation analysis was performed to scrutinize the peer interests of these papers.The research hotspots in the field were evaluated,based on which some feasible topics for future studies were proposed.In general,the results demonstrated that protein corona of nanoparticles was a prospective research area,and had attracted global research interests.It was believed that this work could comprehensively highlight the bibliometrics landscape,inspire further exploitation on protein corona of nanoparticles,and ultimately promote the clinical translation of nanoparticles.

关键词： protein corona nanoparticle bibliometrics Web of Science

来源：

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

Hydrogen absorption-desorption cycle decay mechanism of palladium nanoparticle decorated nitrogen doped graphene

引用

Progress in Natural Science:Materials International 2021年第4期31卷 514-520页

作者： Jiao Li chaonan Jin Ruijun Qian Chaoling Wu Yao wang Yigang Yan Yungui Chen Department of Advanced Energy Materials College of Materials Science and Engineering Sichuan University Engineering Research Center of Alternative Energy Materials & Devices Ministry of Education Institute of New Energy and Low-Carbon Technology Sichuan University

As a hydrogen storage material, palladium nanoparticle decorated nitrogen doped graphene(Pd/N-r GO) has drawn much attention owing to its high absorption capacity at moderate conditions. However, its hydrogen absorption-desorption cycle performance, which is essential for their practical application, has been rarely studied. In this paper, a simple and convenient high temperature thermal reduction method was used to synthesize nitrogen-doped graphene decorated with Pd nanoparticles(Pd/N-r GO). Taken it as a representative, the hydrogen absorption-desorption cycle performance of Pd/N-r GO was investigated. The results showed that after three cycles the hydrogen storage capacity dropped from 2.9 wt% to 0.8 wt% at 25C and 4 MPa pressure. It was found that the palladium nanoparticles shed from Pd/N-RGO sheet after cycle performance test, and then agglomerated. These phenomena will weaken the hydrogen spillover effect, leading to the decrease of hydrogen storage capacity. Meanwhile, decreased defects reduce the hydrogen absorption sites, which will thus deteriorate the hydrogen storage capacity.

关键词： Cycle performance Hydrogen storage Hydrogen spillover effect Agglomeration Defects

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Biochar mitigates the biotoxicity of heavy metals in livestock manure during composting

引用

Biochar 2022年第1期4卷 391-403页

作者： Xiaomeng Chen Zhuang Du Dan Liu Liqin wang chaonan Pan Zimin Wei Liming Jia Ran Zhao College of Life Science Northeast Agricultural UniversityHarbin 150030China Heilongjiang Province Environmental Monitoring Center Harbin 150056China

The addition of biochar could mitigate the bioavailability of heavy metals during livestock manure composting.However,the main action mechanism of biochar,such as how it worked,was ambiguous.Therefore,in this study,materials(biochar,alkali modified biochar,pretreated cotton ball)were added by embedding with nylon mesh bags to explore the adsorption performance of added materials and its influence on the composting process.The results showed that embedded materials promoted the formation of humic acid and reduced the distribution proportion of bioavailable fraction of heavy metals during composting(Cu:at least 15.72%;Zn:at least 33.44%).The surface of biochar extracted from composting contained attachments,however,the attachment of heavy metal was not detected and functional groups on the materials did no change significantly.This indicated that the addition of biochar did not directly adsorb heavy metals.Most notably,the microbial network changed after embedding materials,and the succession of microbial community promoted the formation of humic acid.Ultimately,structural equation models verified that embedded materials promoted the formation of humic acid through stable microbial groups,thereby accelerating the passivation of heavy metals during composting.This study provides theoretical and technical supports for mitigating the biotoxicity of heavy metals by biochar during composting.

关键词： Chicken manure composting Biochar addition The biotoxicity of heavy metals Action mechanism Humic acid formation

来源：

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

Yellow responsive material based modification to reduce earphone induced Infection and hearing loss

引用

Nano Research 2022年第7期15卷 6297-6305页

作者： Haoxin Cheng Hongmei Liu Zhiqiang Liu Ziying Xu Xiaorong Liu Shuang Jia chaonan He Shichen Liu Jiao Zhang Xiaolei wang College of Chemistry Nanchang UniversityNanchang 330088China The National Engineering Research Center for Bioengineering Drugs and the Technologies Institute of Translational MedicineNanchang UniversityNanchang 330088China The First Clinical Medical School Nanchang UniversityNanchang 330088China The Stomatological School Nanchang UniversityNanchang 330088China The Department of Vascular Surgery the Second Affiliated Hospital of Nanchang UniversityNanchang UniversityNanchang 330006China

Today,earphones have almost been owned by everyone.However,wearing earphones for a long time can cause two serious problems:(1)irreversible damage to hearing;(2)rapid proliferation of bacteria in the ear canal.Herein,an earphone modification strategy is developed for the first time,to reduce hearing loss and inhibit bacteria simultaneously.This earphone is equipped with a high purity yellow light(YL)light-emitting diode chip developed by our university.Then,the surface of the earphone is loaded with porous zinc oxide and silver nanoparticle composite material(ZnO-Ag)that can respond to the YL.Under the excitation of YL,the porous ZnO-Ag can release reactive oxygen species with strong antibacterial activity.More importantly,we discover that YL can reduce the expression of matrix metalloproteinase-3,the secretion of inflammatory factors,and apoptosis in the cochlea,thereby effectively reduce hearing loss.

关键词： ZnO yellow light antibacterial activity hearing loss earphone

来源：

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

In-situ generation and global property profiling of metal nanoclusters by ultraviolet laser dissociation-mass spectrometry

引用

Science China Chemistry 2022年第6期65卷 1196-1203页

作者： Zheyi Liu Zhaoxian Qin chaonan Cui Zhixun Luo Bing Yang You Jiang Can Lai Zhipeng wang Xiaolei wang Xiang Fang Gao Li Fangjun wang Chunlei Xiao Xueming Yang State Key Laboratory of Molecular Reaction Dynamics Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China CAS Key Laboratory of Separation Sciences for Analytical Chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China State Key Laboratory for Structural Chemistry of Unstable and Stable Species Institute of ChemistryChinese Academy of SciencesBeijing100190China Dalian National Laboratory for Clean Energy Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China National Institute of Metrology Beijing100013China University of Chinese Academy of Sciences Beijing100049China

Metal nanoclusters are promising nanomaterials with unique properties, but only a few ones with specific numbers of metal atoms can be obtained and studied up to now. In this study, we establish a new paradigm of in-situ generation and global study of metal nanoclusters with different sizes, constitutions, and charge states, including both accurate constitution characterization and global activity profiling. The complex mixtures of metal nanoclusters are produced by employing single-pulsed 193-nm laser dissociation of monolayer-protected cluster(MPC) precursors within a high-resolution mass spectrometry(HRMS). More than400 types of bare gold nanoclusters including novel multiply charged(2+ and 3+), S-/P-doped, and silver alloy ones can be efficiently generated and accurately characterized. A distinct size(1 to 142 atoms)-and charge(1+ to 3+)-hierarchy reactivity is clearly observed for the first time. This global cluster study might greatly promote the developments and applications of novel metal nanoclusters.

关键词： metal nanocluster ultraviolet laser dissociation mass spectrometry global property profiling size-and charge-hierarchy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：