检索结果-南通市图书馆

Straightforward construction of hollow polyoxometalate-based metal-organic framework via pseudo-homoepitaxial growth

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China chemistry 2022年第10期65卷 1921-1928页

作者： Zhong zhang Xujiao Ma Xu Han Hong Cui Ying Lu Shuxia Liu Yiwei Liu Key Laboratory of Polyoxometalate and Reticular Material chemistry of Ministry of Education College of ChemistryNortheast Normal UniversityChangchun 130024China zhang dayu school of chemistry Dalian University of TechnologyDalian 116024China

Hollow structures are significant for shortening diffusion path and promoting active center ***-crystalline hollow polyoxometalate-based metal-organic frameworks(POM@MOFs)with increased adsorption performance and catalytic activity were synthesized through a straightforward pseudo-homoepitaxial growth strategy within only 1.5 *** strategy ingeniously exploits favorable characteristics of well-matched lattice/structure but acid stability difference between MOF and POM@MOF to construct a pseudo-homoepitaxial ***,the MOF single crystals are used as seeds to perform epitaxial growth of the lattice/structure-matched POM@MOF under appropriate ***,the MOF seeds collapse spontaneously during epitaxial growth,affording regular hollow POM@MOF single *** the acid stability of the POM@MOF is much higher than that of the MOF,it is speculated that the hollow structure formation may be related to the acid released from the epitaxial POM@MOF *** the pseudo-homoepitaxial POM@MOF growth strategy based on structural matching but stability difference avoids additional template removal process in conventional hollow MOF preparation and ensures hollow single crystal construction.

关键词： polyoxometalate-based metal-organic framework pseudo-homoepitaxial growth hollow structure single crystals etching

同方期刊数据库

Defect Engineering:Can it Mitigate Strong Coulomb Effect of Mg^(2+)in Cathode Materials for Rechargeable Magnesium Batteries?

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第1期17卷 135-159页

作者： Zhengqing Fan Ruimin Li Xin zhang Wanyu Zhao Zhenghui Pan Xiaowei Yang school of chemistry and Chemical Engineering Shanghai Jiao Tong UniversityShanghai 200240People’s Republic of China school of chemistry and Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024People’s Republic of China school of Materials Science and Engineering Tongji UniversityShanghai 201804People’s Republic of China

Rechargeable magnesium batteries(RMBs)have been considered a promising“post lithium-ion battery”system to meet the rapidly increasing demand of the emerging electric vehicle and grid energy storage ***,the sluggish diffusion kinetics of bivalent Mg^(2+)in the host material,related to the strong Coulomb effect between Mg^(2+)and host anion lattices,hinders their further development toward practical *** engineering,regarded as an effective strategy to break through the slow migration puzzle,has been validated in various cathode materials for *** this review,we first thoroughly understand the intrinsic mechanism of Mg^(2+)diffusion in cathode materials,from which the key factors affecting ion diffusion are further ***,the positive effects of purposely introduced defects,including vacancy and doping,and the corresponding strategies for introducing various defects are *** applications of defect engineering in cathode materials for RMBs with advanced electrochemical properties are also ***,the existing challenges and future perspectives of defect engineering in cathode materials for the overall high-performance RMBs are described.

关键词： Rechargeable magnesium battery Sluggish diffusion kinetic Defect engineering Cathode materials Ion migration

MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 358-371页

作者： Jiaen Wang Wei Ming Longfu Chen Tianliang Song Moxi Yele Hao zhang Long Yang Gegen Sarula Benliang Liang Luting Yan Guangsheng Wang school of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(EMI)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.EMI shielding effectiveness(EMI SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding EMI SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,EMI shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening EMI shielding Photothermal conversion Electric heating performance

Fully automated sample treatment method for high throughput proteome analysis

在线全文

学校读者我要写书评

暂无评论

Science China chemistry 2021年第2期64卷 313-321页

作者： Huiming Yuan Zhongpeng Dai Xiaodan zhang Baofeng Zhao Hongwei Chu Lihua zhang Yukui zhang CAS Key Laboratory of Separation Sciences for Analytical chemistry National Chromatographic R&A CenterDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023China zhang dayu school Dalian University of TechnologyDalian116024China

The bottom-up strategy for proteome analysis typically employs a multistep sample preparation workflow that suffers from being time-consuming and sample loss or contamination caused by the off-line manual ***,we developed a hollow fibre membrane(HFM)-aided fully automated sample treatment(FAST)*** to the confinement effects of HFMs and the immobilized enzymatic reactor,the proteome samples could be denatured,reduced,desalted and digested within 8–20 min via the one-stop *** method also showed superiority in trace sample *** one and half hours,we could identify about 1,600 protein groups for 500 HeLa cells as the starting materials,1.5–8 times more than those obtained by previously reported *** the on-line combination of FAST with nano-liquid chromatography-electrospray ionization tandem mass spectrometry(nanoLC-ESI-MS/MS),we further established a fully integrated platform for label-free quantification of proteome with high reproducibility and ***,FAST presented here represents a major advance in the high throughput sample treatment and quantitative analysis of proteomes.

关键词： proteomics fully automated sample treatment hollow fibre membrane immobilized enzymatic reactor label-free quantification

Quantitative assessment of rhodamine spectra

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2021年第2期32卷 943-946页

作者： Wei Zhou Xiangning Fang Qinglong Qiao Wenchao Jiang Yue zhang Zhaochao Xu CAS Key Laboratory of Separation Science for Analytical chemistry Dalian Institute of Chemical Physics.Chinese Academy of SciencesDalian 116023China zhang dayu school of chemistry Dalian University of TechnologyDalian U6012China

With the development of single-molecule detection and super-resolution fluorescence imaging,rhodamine dyes gain new *** the modification of the N-substituents a nd the replacement of the oxygen atom in xanthene,the wavelength and brightness can be effectively ***,the spectra of rhodamine,especially due to the balance between ring-closed non-fluorescent lactone and ring-opened fluorescent zwitterion/cation,are sensitive to interference from various environmental facto rs,In this way,the spectral data of various rhodamines repo rted by different re search groups under different test conditions lacked comparability,sometimes even lacked *** order to meet the requirements for the accuracy and uniformity of spectral data in the research of single molecule imaging and dye structure-fluorescence relationship study,we have tested the spectra of fifteen rhodamine dyes that cover the visible and near-infrared regions under exactly the same *** studying the dependence of the spectra on dye concentrations,it was confirmed that 1 μmol/L was ideal fo r detection less from the interference of dye molecule *** provide compre hensive and reliable spectral data of these fifteen dyes,which are expected to be used as references for future *** the direct comparison of different rhodamine spectra would help to understand the structure-fluorescence relationship of rhodamines.

关键词： Rhodamine Quantitative assessment Absorption Emission Quantum yield

Self-Healing All-in-One Energy Storage for Flexible Self-Powering Ammonia Smartsensors

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2022年第3期5卷 986-995页

作者： Hongting Ma Fengjuan Lv Liuxue Shen Kaizhou Yang Yu Jiang Junlin Ma Xiaodong Geng Tongrui Sun Yuzhen Pan Zhuang Xie Mianqi Xue Nan Zhu zhang dayu school of chemistry Dalian University of TechnologyDalian Liaoning 116024China school of Materials Science and Engineering and Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education Sun Yat-sen UniversityGuangzhou 510275China Technical Institute of Physics and chemistry Chinese Academy of SciencesBeijing 100190China

Self-healable and flexible all-in-one self-powering smartsensing devices have recently attracted great ***,a flexible all-in-one solid-state electronic system of polyvinyl alcohol(PVA)hydrogel-based supercapacitors for self-powering ammonia smartsensors has been ***-healing supercapacitors are prepared by integrating polypyrrole(PPy)and boron crosslinked PVA/KCl hydrogel as a sandwich configuration,exhibiting large specific capacitance of 244.81 mF cm^(-2)at 0.47 mA cm^(-2),and good charging/discharging stability of 2000 cycles,while ammonia sensors are realized by a SnO_(2)/PPy-modified conductive PVA hydrogel film,demonstrating an excellent sensing behavior toward NH_(3) vapor under 50 ppb–500 *** a result,selfhealing supercapacitors could well store energy and then self-power sensing unit for remotely real-time detection via a smartphone,acquiring high flexibility of energy-sensing *** attractive biocompatibility and selfhealing performance toward various environment,this all-in-one flexible energy-smartsensor system would pave the way to novel fabrication process in realization of wearable self-healing smart devices.

关键词： ammonia sensor flexible supercapacitor hydrogel self-healing self-power

Impacts of nano-scale pore structure and organic amine assembly in porous silica on the kinetics of CO_(2) adsorptive separation

在线全文

学校读者我要写书评

暂无评论

Nano Research 2021年第9期14卷 3294-3302页

作者： Feijian Lou Guanghui zhang Limin Ren Xinwen Guo Chunshan Song State Key Laboratory of Fine Chemicals PSU-DUT Joint Center for Energy ResearchSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China zhang dayu school of chemistry Dalian University of TechnologyDalian 116024China Department of chemistry Faculty of Sciencethe Chinese University of Hong KongShatinHong KongChina

Nano structure including pore structure and amine assembly is critical for improving sorption and desorption kinetics for adsorptive CO_(2) *** present work delineates(1)the influence of the nano-scale pore structure of amine-functionalized solid sorbents,and(2)effect of changing the assembly of amine molecules on surface of nano-porous SiO_(2) on the rates of adsorption and desorption of CO_(2).50PEI-MSN sorbent with inverted cone-shaped pores was prepared by using mesoporous silica nanospheres(MSN)with inverted cone-shaped pores for the loading of polyethyleneimine(PEI).Co-structure-directing(CSD)method was used to synthesize the sorbent with arranged amine assembly at nano-scale(2N-CSD).By comparison with 50PE卜SBA15 as a benchmark sorbent,both sorbents have improved sorption and desorption *** are significant effects of nano pore structure and amine assembly on the sorption and desorption *** inverted cone-shaped pores in MSN allow loading polymeric amines in their narrower ends and leaving larger pore mouths open for the transport of CO_(2);50PEI-MSN shows a maximum sorption rate of 81.4 mg·g^(-1)·min^(-1) with average sorption rate of 25.4mg·g^(-1)·min^(-1) at 80℃ which are 34%and 59%higher than the corresponding values for 50PEI-SBA15;a maximum desorption rate of 38.4mg·g^(-1)·min^(-1) with average desorption rate of 11.8 mg·g^(-1)·min^(-1) ramping from 30 to 95℃ which are 37%and 156%higher than the corresponding values for *** arranged monolayer-like amine assembly on surface of nanoporous SiO_(2) likely provides high amine sorption sites through improved accessibility of amine,and 2N-CSD shows a maximum sorption rate of 60.5 mg·g^(-1)·min^(-1),with average sorption rate of 12.8mg·g^(-1)·min^(-1) at 300C which are 108%and 205%higher than the corresponding values for 50PEI-SBA15;a lower maximum desorption rate of 9.7 mg g'1min"1 and average desorption rate of 9.8mg·g^(-1)·min^(-1) ramping from 30 to 95℃ which is 250%h

关键词： CO_(2)capture amine-functionalized solid sorbents pore structure amine assembly kinetics

Self-assembly of phosphorylated peptide driven by Dy^(3+)

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

Chinese Chemical Letters 2023年第8期34卷 180-183页

作者： Hang Yang Yuting Xiong Minmin Li Zhiying Yang Peiran Meng Guangyan Qing CAS Key Laboratory of Separation Science for Analytical chemistry Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China zhang dayu school of chemistry Dalian University of TechnologyDalian 116024China

Nature chooses phosphorylation as a key modification to modulate and program the functions of *** phosphorylated peptides(PPs)have been widely identified and investigated by biologists,but the possibility that PPs could become a building unit for artificial materials is *** we report for the first time a supramolecular assembly of PPs with the assistance of dysprosium ions(Dy^(3+)).Dy^(3+)bridges multiple phosphate groups in double-phosphorylated peptides(di-PPs),and braid these peptide chains into *** assembly occurs inside nanochannels and blocks the channels,leading to prominent“ON–OFF”switching in transmembrane ionic *** di-PPs’assembling process could be dynamically regulated by the addition or deletion of phosphate groups under the control of kinases or *** study proves the huge potential of PPs being utilized as materials via self-assembling,which will promote the design of novel bio-inspired artificial materials and devices.

关键词： Nanochannel Phosphorylation Self-assembly Peptides Dysprosium

Water promoted structural evolution of Ag nanocatalysts supported on alumina

在线全文

学校读者我要写书评

暂无评论

Nano Research 2023年第7期16卷 9107-9115页

作者： Conghui Liu Rongtan Li Fei Wang Kun Li Yamei Fan Rentao Mu Qiang Fu zhang dayu school of chemistry Dalian University of TechnologyDalian 116024China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China

Water is often involved in many catalytic processes,which can strongly affect structural evolution of catalysts during pretreatments and catalytic *** this work,we demonstrate a promotional effect of H_(2)O on both oxidative dispersion and spontaneous aggregation of Ag nanocatalysts supported on *** nanoparticles supported onγ-Al_(2)O_(3) and Ag nanowires on Al_(2)O_(3)(0001)can be dispersed into nanoclusters via annealing in O_(2)above 300℃,which is accelerated by introduction of H_(2)O into the oxidative ***,the formed highly dispersed Ag nanoclusters are subject to spontaneous aggregation in humid atmosphere at room *** situ and in situ characterizations in both powder and model catalysts suggest that formation of abundant surface hydroxyls and/or water adlayer on the Al_(2)O_(3) surface in the H_(2)O-containing atmosphere facilitates the surface migration of Ag species,thus promoting both dispersion and aggregation *** aggregation of the supported Ag nanostructures induced by the humid oxidative atmosphere enhances CO oxidation but inhibits selective catalytic reduction of NO with C_(3)H_(6).This work illustrates the critical role of H_(2)O in structure and catalytic performance of metal nanocatalysts,which can be widely present in heterogeneous catalysis.

关键词： Ag nanocatalyst spontaneous aggregation oxidative dispersion water effect