检索结果-南通市图书馆

Structure and oxygen-defect regulation of hydrated vanadium oxide for enhanced zinc ion storage via interlayer doping strategy

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第5期16卷 6094-6103页

作者： Bingchen Zhang Xihao Han Wenpei Kang daofeng sun School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580China

Hydrated vanadium oxide(VOH)is a promising cathode candidate for the aqueous zinc-ion batteries(AZIBs),due to the large interlayer spacing and high ***,severe pulverization and structure collapse upon cycling limit its practical ***,preintercalation strategy with higher positive charge of Cr^(3+) is proposed to regulate the structure and oxygen defect of the VOH-O_(d).The VOH-O_(d) with moderated amount of Cr^(3+) incorporation(M-CrVOH-O_(d)),showing a flower-like hierarchical structure assembled with thin nanosheets,can expand the interlayer spacing and increase the oxygen defect,inducing an enhanced high-rate cycling *** a result,M-CrVOH-O_(d) delivers a high capacity of 405 mAh·g^(−1)at 0.5 A·g^(−1),high capacity retention of 120%over 3,500 cycles,as well as an extraordinary energy output(297.3 Wh·kg^(−1)at 355.9 W·kg^(−1)).The density functional theory(DFT)calculations can prove the enhanced reaction kinetics with narrower bandgap and lower Zn^(2+) adsorption energy after the ***,based on the ex-situ X-ray diffraction(XRD)analysis,synergistic intercalation of the Zn^(2+)/H^(+)into the interlayers of M-CrVOH-O_(d) can bring the high specific *** work could help us understand the enhanced performance of VOH from the point of the chemical reactions.

关键词： hydrated vanadium oxide preintercalation cathode aqueous zinc-ion batteries

Fe-Based Metal-Organic Frameworks:From Various Synthesis,Diverse Structures to Multifunctional Applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2023年第24期41卷 3772-3791页

作者： Xiaokang Wang Mingming Xu Weidong Fan daofeng sun State Key Laboratory of Heavy Oil Processing School of Materials Science and EngineeringChina University of Petroleum (East China)QingdaoShandong266580 China

Iron-based metal-organic frameworks(Fe-MOFs)have attracted extensive interest from researchers due to their tunability,favorable properties,and chemical *** with conventional porous materials,Fe-MOFs exhibit better performance in a wide variety of ***,the structures of Fe-MOFs are summarized to explore potential structures based on isoreticular chemistry,as well as the recent research progress in their synthesis and multifunctional *** rapid development of Fe-MOFs has broadened the application range of Fe-MOFs,and a brief description of Fe-MOF applications in gas storage and separation,catalysis,bioimaging,and magnetism is outlined,with the aim to expand the prospects of Fe-MOFs in more practical applications.

关键词： Fe-based metal-organic frameworks Carboxylate ligands Gas storage Gas separation Catalysis Bioimaging Magnesium

Pore-Environment Engineering in Multifunctional Metal-Organic Frameworks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2020年第5期38卷 509-524页

作者： Xiurong Zhang Xia Wang Weidong Fan daofeng sun College of Science China University of Petroleum(East China)QingdaoShandong 266580China School of Materials Science and Engineering China University of Petroleum(East China)QingdaoShandong 266580China

Contents *** *** Synthesis *** modification of ligands *** modification of secondary buildingunits(SBU)*** metal-organic frameworks(MTV-MOF)***-Synthesis Modification(PSM)***-synthetic metal exchange(PSME)***-synthetic ligand exchange(PSLE)***-synthetic elimination and insertion(PSE&I)*** Block Replacement(BBR)***-assisted linker exchange(SALE)***-bridged ligand replacement *** at nodes or within linkers *** Space Partition in MOF(PSP)***-within-Cage MOFs ***-dimensional channel segmentation *** of Multi-mesoporous MOF *** thermolysis *** shear *** Septal Ligand Insertion *** and Perspectives *** Metal-Organic Frameworks(MOFs)are organic-inorganic hy-brid crystalline materials with intramolecular pores formed byself-assembly of organic ligands and inorganic metal ions or clus-ters through coordination bonds.[1]Compared with traditionalinorganic porous materials,MOFs have flexible ligands and metalnodes,large specific surface area,adjustable pore size,and modi-fiable structure,which show great potential in gas storage,sepa-ration,catalysis and energy technology applications.[2]At thesame time,the clear and adjustable crystal structure provides anideal platform for the study of material structure-activity(struc-ture-performance)relationship,which makes MOFs have greatadvantages in structural research and practical applications.

关键词： inorganic exchange bonds

High-selectivity Detection of 2,4,6-Trinitrophenol Based on Fluorescent Mg-MOF-74 in Ethanol Solution

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2018年第2期34卷 175-179页

作者： ZHANG Liangliang XIN Xuelian LU Yukun sun daofeng College of Science China University of Petroleum(East China) Qingdao 266580 P. R. China College of Public Health Hebei University Baoding 071000 P. R. China

Mg-MOF-74 has adsorption capacity while less research is about its luminescent properties. In this work, the fluorescent properties of Mg-MOF-74 were studied and characterized. The results show that Mg-MOF-74 exhibits excellent fluorescent properties and, most strikingly, selective sensing detection for nitroaromatic compounds（NACs）, 2,4,6-trinitrophenol（PA） in particular, making it a promising PA-selective luminescent probe. This work demonstrates the application of MOFs in the detection of NACs with good selectivity.

关键词： Nitroaromatic compound detection 2,4,6-Trmitrophenol detection Fluorescent sensor Mg-MOF-74

Atomically thin defect-rich Ni-Se-S hybrid nanosheets as hydrogen evolution reaction electrocatalysts

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2020年第8期13卷 2056-2062页

作者： Jianpeng sun Xiangting Hu Zhaodi Huang Tianxiang Huang Xiaokang Wang Hailing Guo Fangna Dai daofeng sun College of Science School of Materials Science and EngineeringChina University of Petroleum(East China)Qingdao266580China School of Physics State Key Laboratory of Crystal MaterialsShandong UniversityJinan250100China The State Key Lab of Heavy Oil Processing College of Chemical EngineeringChina University of Petroleum(East China)Qingdao266580China

Facile design of economic-effective hydrogen evolution reaction(HER)catalysts with non-noble materials are promising for the production of renewable chemical ***-dimensional(2D)ultrathin transition metal dichalcogenides(TMDs)materials with large specific surface area and abundant catalytic active sites can significantly enhance their catalytic ***,we design and synthesize an atomically thin Ni-Se-S based hybrid nanosheet(NiSe1.2S0.8)via a simple solvothermal method,the thickness of NiSe1.2S0.8 nanosheets is only about 1.1 *** from the ultrathin nanostructure and rich defects,the optimal NiSe1.2S0.8 exhibits good electrocatalytic activity with the overpotential of 144 mV at−10 mA·cm−2,a small Tafel slope of 59 mV·dec−1,and outstanding catalytic stability in acid electrolyte for *** theoretical results show that hybrid electrocatalyst by S incorporation possesses the optimal adsorption free energy of hydrogen(ΔGH*).This study provides a simple method to synthesize a highperformance multicomponent electrocatalysts with the ultrathin nanostructures and abundant defects.

关键词： hydrogen evolution reaction atomically thin defect-rich Ni-Se-S electrocatalysts

Synthesis, structure, and magnetism of three manganese-organic framework with PtS topology

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2014年第11期57卷 1507-1513页

作者： MENG QingGuo DAI FangNa ZHANG LiangLiang WANG RongMing sun daofeng Key Lab of Colloid and Interface Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shandong University Chemistry & Chemical and Environmental Engineering College Weifang University College of Science China University of Petroleum (East China)

Three 3D manganese-organic frameworks, Mn2(BPTC)(DMF)2(H2O)·DMF·3H2O(1), Mn2(BPTC)(bipy)(DMF)·DMF·H2O(2), and Mn2(BPTC)(phen)(DMF)·EtOH(3), have been solvothermally synthesized using 3,3′,5,5′-biphenyltetracarboxylic acid(H4BPTC). All complexes are characterized by PXRD, EA, IR and TG. The results show that they all bear the PtS topology with(42.84)(42.84) for the vertex symbols of the planar and tetrahedral nodes, in which the BPTC ligand is considered as a square-planar 4-connected linker, and every binuclear SBU connected to the four BPTC ligands is simplified into tetrahedral 4-connected nodes. Because the three coordination sites of one metal center of SBU are occupied by the coordinated solvent molecules, complex 1 exhibits low stability. After substituting 2,2′-bipy or 1,10-phen for two coordinated solvent molecules, complexes 2 and 3 display evidently higher structure stability. The magnetism property of complex 2 is also discussed in detail.

关键词： metal-organic frameworks manganese PtS topology solvothermal synthesis magnetism

Linker extension through hard-soft selective metal coordination for the construction of a non-rigid metal-organic framework

在线全文

学校读者我要写书评

暂无评论

Science China Chemistry 2013年第4期56卷 418-422页

作者： WEI ZhangWen YUAN DaQiang ZHAO XiaoLiang sun daofeng ZHOU Hong-Cai Department of Chemistry Texas A&M University College Station Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Key Lab of Colloid and Interface Chemistry Ministry of Education School of Chemistry and Chemical Engineering Shandong University

A metal-organic framework （MOF） has been obtained by using a linker extension strategy. Three di-anions of 4-（3,5-dimethyl- 1H-pyrazol-4-yl）-benzoic acid coordinate to three Cu（I） ions forming an extended trigon... 详细信息

关键词： MOF linker extension copper (I)

Two-dimensional cobalt metal-organic frameworks for efficient C_3H_6/CH_4 and C_3H_8/CH_4 hydrocarbon separation

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2018年第6期29卷 865-868页

作者： Weidong Fan Yutong Wang Zhenyu Xiao Zhaodi Huang Fangna Dai Rongming Wang daofeng sun State Key Laboratory of Heavy Oil Processing College of Science China University of Petroleum (East China)

A Co-based two-dimensional（2 D） microporous metal-organic frameworks, [Co2（TMTA）（DMF）2（H2O）2]·NO3-·DMF（UPC-32） has been synthesized based on 4,4’,4’’-（2,4,6-trimethylbenzene-1,3,5-triyl）tribenzoic acid（H3TMTA）. UPC-32 features a 2 D microporous framework exhibits high adsorption of H2（118.2 cm3/g, 1.05 wt%, at 77 K）, and adsorption heat（Qst） of CO2（34–46 k J/mol）. UPC-32 with narrow distance between layers（3.8 ？） exhibits high selectivity of C3H6/CH4（31.46） and C3H8/CH4（28.04） at298 K and 1 bar. It is the first 2 D Co-MOF that showed selective separation of C3 hydrocarbon from CH4.

关键词： Metal-organic frameworks Microporous Two-dimensional Selective separation

Expanding the dimensionality of proton conduction enables ultrahigh anhydrous proton conductivity of phosphoric acid-doped covalent-organic frameworks

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第8期16卷 10946-10955页

作者： Qianqian Yang Xinyu Li Changsong Xie Ning Liu Jianjian Yang Zhihui Kong Zixi Kang Rongming Wang Xiyou Li daofeng sun School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580China State Key Laboratory of Heavy Oil Processing College of Chemistry and Chemical EngineeringChina University of Petroleum(East China)Qingdao 266580China

It is of great significance to develop high-temperature anhydrous proton conducting ***,we report a new strategy to significantly enhance the proton conductivity of covalent organic frameworks(COFs)through expanding the dimensionality of proton *** COF-based composites,COF-1@PA,COF-2@PA,and COF-3@PA(PA:phosphoric acid),are prepared by PA doping of three COFs with similar pore sizes but different amounts of hydrophilic *** the increase of hydrophilic groups,COFs can load more PA because of the enhanced hydrogen–bonding interactions between PA and the *** X-ray diffraction(PXRD),scanning electron microscopy(SEM),and two-dimensional(2D)solid-state nuclear magnetic resonance(NMR)analyses show that PA can not only enter the channels of COF-3,but also insert into its 2D *** expands the proton conduction pathways from one-dimensional(1D)to three-dimensional(3D),which greatly improves the proton conductivity of ***,the confinement effect of 1D channels and 2D layers of COF-3 also makes the hydrogen-bonded networks more orderly in COF-3@PA-30(30μL of PA loaded on COF-3).At 150℃,COF-3@PA-30 exhibits an ultrahigh anhydrous proton conductivity of 1.4 S·cm−1,which is a record of anhydrous proton conductivity reported to *** work develops a new strategy for increasing the proton conductivity of 2D COF materials.

关键词： covalent organic framework proton conductors anhydrous proton conduction phosphoric acid(PA) doping