检索结果-南通市图书馆

维普期刊数据库博看期刊

Scalable Fabrication of Metallic Conductive Fibers from Rheological Tunable Semi-Liquid Metals

在线全文

学校读者我要写书评

暂无评论

Research 2023年第2期2022卷 445-454页

作者： Shujun Tian Hao Peng Huaizhi Liu jiancheng zhou Jiuyang Zhang School of Chemistry and Chemical Engineering Jiangsu Hi-Tech Key Laboratory for Biomedical ResearchSoutheast UniversityNanjing 211189China

Conductive polymer fibers/wires(CPFs)are important materials in modern technologies due to their unique one-dimension geometry,electrical conductivity,and ***,the advanced applications of current CPFs are limited by their low electrical conductivities(<500 S/m)and poor interfacial interactions between conductive fllers(e.g.,graphite)and ***,in current electrical applications,metal wires/foils like copper and aluminum are the most frequently utilized conductive fibers/wires instead of the inferior conductive *** work successfully addresses the heavy phase segregation between polymers and conductive inorganic materials to obtain semiliquid metal polymer fibers(SLMPFs)which exhibit an ultrahigh electrical conductivity(over 10^(6)S/m),remarkable thermal processability,and considerable mechanical performance(Young's modulus:~300 MPa).Semiliquid metal(gallium-tin alloy)with tunable viscosities is the key to achieve the excellent miscibility between metals and *** the rheological results and numerical simulations demonstrate the critical viscosity matching for the successfui preparation of the *** importantly,the fibers are adapted with classic polymer melt-processing like melt injection,which indicates the scalable production of the highly conductive *** SLMPFs are highly promising substitutes for metal wires/fbers in modern electrical applications such as electricity transmission,data communication,and underwater works.

关键词： alloy fibers electrical

维普期刊数据库

Trimetallic Au@PdPb nanowires for oxygen reduction reaction

在线全文

学校读者我要写书评

暂无评论

Nano Research 2020年第10期13卷 2691-2696页

作者： Xian Jiang Yuexin Xiong Ruopeng Zhao jiancheng zhou Jong-Min Lee Yawen Tang School of Chemistry and Chemical Engineering Southeast University Nanjing 11189China Schoo of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637459Singapore jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Center of Biomedical Functional MaterialsSchool of Chemistry and Materials ScienceNanjing Normal UniversityNanjing 210023China

The development of highly efficient and stable Pd-based catalysts is crucial to improve their sluggish oxygen reduction reaction(ORR)kinetics in acid *** improve ORR activity and utilization efficiency of Pd,an ideal catalyst should have ORR-favorable chemical environment,optimized geometric structure,and long periods of *** this work,we first synthesize a novel trimetallic Au@PdPb core–shell catalyst consisting of PdPb alloy nano-layers grown on the surface of ultrathin Au nanowires(NWs)by a two-step water-bath *** Au@PdPb NWs have the merits of anisotropic one-dimensional nanostructure,high utilization efficiency of Pd atoms and doping of Pb *** of the structural and multiple compositional advantages,Au@PdPb NWs exhibit remarkably enhanced ORR activity with a high haIf-wave potential(0.827 V),much better than those of commercial Pd black(0.788 V)and bimetallic Au@Pd NWs(0.803 V).Moreover,Au@PdPb NWs display better electrocatalytic stability for the ORR than those of Pd black and Au@Pd *** study demonstrates the validity of our approach for deriving highly ORR-active Pd-based catalysts by modifying their structure and composition.

关键词： trimetallic Au@PdPb nanowires core–shell structure optimized electronic structure electrocatalyst oxygen reduction reaction

Sulfur and carbon co-doped g-C_(3)N_(4)microtubes with enhanced photocatalytic H2 production activity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers in Energy 2024年第1期18卷 110-121页

作者： Yang GE Quanhao SHEN Qi ZHANG Naixu LI Danchen LU Zhaoming ZHANG Zhiwei FU jiancheng zhou School of Chemistry and Chemical Engineering Southeast UniversityNanjing 211189China Shangdong Yellow Triangle Biotechnology Industry Research Institute Co. Ltd.Dongying 257091China Xuzhou B&C Chemical Co. Ltd.Xuzhou 221300China

Metal-free graphitic carbon nitride(g-C_(3)N_(4))has captured significant attention as a low-cost and efficient hydrogen production photocatalyst *** regulating the microstructure and accelerating the separation of photogenerated carriers remain crucial strategies for promoting the photocatalytic performance of this ***,a novel sulfur–carbon co-doped g-C_(3)N_(4)(SCCN)hierarchical microtubules filled with abundant nanosheets inside by thermal polymerization is *** nanosheets create abundant pores and cavities inside the SCCN microtubes,thereby increasing the specific surface area of g-C_(3)N_(4)and providing sufficient reactant attachment ***,the hierarchical structure of SCCN microtubules strengthens the reflection and scattering of light,and the utilization of visible light is favorably *** importantly,co-doping S and C has greatly improved the photocatalytic performance of graphitic carbon nitride,optimized the band gap structure and enhanced the photogenerated carrier ***,the SCCN exhibits a remarkable photocatalytic H_(2)evolution rate of 4868μmol/(g·h).This work demonstrates the potential of multi-nonmetal doped g-C_(3)N_(4)as the ideal photocatalyst for H2 evolution.

关键词： carbon nitride photocatalysis hydrogen production

Catalytic Hydrogenation of Acetic Acid to Acetaldehyde: Synergistic Effect of Bifunctional Co/Ce-Fe Oxide Solid Solution Catalysts

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 2019年第7期37卷 709-719页

作者： Naixu Li Qi Zhang Rehana Bibi Quanhao Shen Richard Ngulube Yunyi Liu jiancheng zhou School of Chemistry and Chemical Engineering Southeast University Nanjing Jiangsu 211189 China Jiangsu Key Laboratory for Biomass Energy and Material Nanjing Jiangsu 210042 China Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research Southeast University Nanjing Jiangsu 211189 China

The large-scale industrial production of acetic acid (HAc) from carbonylation of methanol has enabled intense research interest from direct hydrogenation of HAc to acetaldehyde (AA).Herein,a series of cerium-iron oxide solid solution supported metallic cobalt catalysts were prepared by modified sol-gel method and were applied in gas-phase hydrogenation of HAc to AA.A synergistic effect between the hydrogenation metal cobalt and Ce-Fe oxide solid solution is ***,oxygen vacancies provide the active sites for adsorption of HAc,while highly uniformly dispersed metallic Co adsorbs H2 and activates the reduction of HAc into ***,the metallic Co can also assist the cyclical conversion between Fe3+/Fe2+ and Ce3+/Ce4+ on the surface of ***2-δ *** unique effect substantially enhances the ability of the support material to rapidly capture oxygen atoms from *** is found that the catalyst of 5% Co/Ce0.8Fe0.2O2-δ with the highest concentration of oxygen vacancy presents the best catalytic performance (*** yield reaches 49.9%) under the optimal reaction conditions (i.e.623 K and H2 flow rate =10 mL/min).This work indicates that the Co/Ce-Fe oxide solid solution catalyst can be potentially used for the selective hydrogenation from HAc to *** synergy between the metallic Co and Ce1-xFexO2-δ revealed can be extended to the design of other composite catalysts.

关键词： Acetic Acid Acetaldehyde Oxide Solid Solution Catalysts

Synthesis of AgI/Bi2MoO6 nano-heterostructure with enhanced visible-light photocatalytic property

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Progress in Natural Science:Materials International 2018年第2期28卷 235-241页

作者： Li Zhang Hongcheng Teng jiancheng zhou Yueming Sun Naixu Li Maochang Liu Dengwei Jing School of Chemistry and Chemical Engineering Southeast University Department of Chemical and Pharmaceutical Engineering Southeast University Chengxian College Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research Southeast University International Research Center for Renewable Energy & State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University Suzhou Academy of Xi'an Jiaotong University

A novel nano-heterostructure of Ag I/Bi2MoO6photocatalyst was successfully synthesized via a facile depositionprecipitation method. The samples were systematically characterized by X-ray diffraction, scanning and transmission electron microscopy, X-ray photoemission spectroscopy, UV–Vis absorption spectroscopy, and photoluminescence spectra. While sole Bi2MoO6or Ag I showed poor activity toward photocatalytic rhodamine B degradation, the nano-heterostructure was found with superior performance. The AgI/Bi2MoO6composite with an optimal content of 20 wt% Ag I exhibited the highest photocatalytic degradation rate. Rhodamine B was totally degraded within 75 min visible-light irradiation. Moreover, the hybrid photocatalyst also showed a fairly good stability for several-cycle reuse. This study indicates that the AgI/Bi2MoO6nano-heterostructure can be used as an effective candidate for photocatalytic degradation of organic pollutants.

关键词： Heterostructure Photocatalyst RhB-degradation

Preparation and Characterization of BAS Reinforced with SiC Platelets

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2000年第5期16卷 481-485页

作者： Jiancun RAO+, jiancheng GU, Yu zhou, Feng YE and Tingquan LEI (Harbin Institute of Technology, Harbin 150001, China) Harbin Institute of Technology Harbin 150001 China

BAS glass-ceramic powders were prepared by sol-gel processing. SiC platelets reinforced BAS glass-ceramic matrix composites with high density and uniform microstructure could be made using hot-pressing method. The related processing parameters were studied in this work, including effects of additional seed on transformation from H to M of barium aluminosilicate. DTA method was used to determine exact time to press mixture powders during hot-pressing for the purpose of effective densification. Microstructure and mechanical properties of the composites were investigated by mean of SEM, XRD and TEM techniques as well as three points bending test and single edge notched beam measurement. The results showed that the flexural strength and fracture toughness value of the BAS glass-ceramic matrix composites could be effectively improved by the addition of the SiC platelets. But the relative densities of composites were slightly decreased. The main toughening mechanism is crack deflection, platelets' pull-out and bridging. The increased value of flexural strength is contributed to the load transition effect from matrix to SiC platelets.

关键词： BAS Preparation and Characterization of BAS Reinforced with SiC Platelets SiC

维普期刊数据库

Facile Synthesis of Cellulose Acetate Ultrafiltration Membrane with Stimuli-Responsiveness to pH and Temperature Using the Additive of F127-b-PDMAEMA

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2017年第7期35卷 1109-1116页

作者： Naixu Li Jun Yin LingfeiWei Quanhao Shen Wei Tian Jing Li Yong Chen Jing Jin Hongcheng Teng jiancheng zhou School of Chemistry and Chemical Engineering Southeast University Nanjing Jiangsu 211189 China Department of Biological and Chemical Engineering Jingdezhen College Jingdezhen Jiangxi 333000 China Department of Chemical and Pharmaceutical Engineering Southeast University Chengxian College Nanjing Jiangsu 210088 China Jiangsu Province Hi-Tech Key Laboratory for Bio-medical Research Southeast University Nanjing Jiangsu 211189 China

We fabricate a novel cellulose acetate （CA） ultrafiltration membrane modified by block copolymer F127-b- PDMAEMA, which is synthesized using F127 and DMAEMA via the ARGET ATRP method. Compared to conven- tional ultrafiltration membranes, the incorporation of both F 127 and PDMAEMA can not only readily increase the hydrophilicity of the membrane, but also exhibit stimuli-responsiveness to temperature and pH. Fourier transform infrared spectroscopy （FT-IR）, nuclear magnetic resonance spectroscopy （NMR）, and gel permeation chromatog- raphy （GPC） are employed to analyze the structure of the F 127-b-PDMAEMA. The membrane properties are eval- uated via scanning electron microscope （SEM） imaging, porosity test, automatic target recognition Fourier trans- form infrared spectroscopy （ATR-FTIR）, water contact angle test and permeation test. The results indicate that the F 127-b-PDMAEMA is an excellent pore agent, which contributes to an enhancement of the membrane in sensitivity to temperature and pH. The modified membrane also exhibits lower water contact angle （64.5~）, which is attributed to the good anti-fouling performance and high water permeation.

关键词： F 127-b-PDMAEMA stimuli-responsiveness cellulose acetate membrane

1-Naphthol induced PtsAg nanocorals as bifunctional cathode and anode catalysts of direct formic acid fuel cells

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 2019年第2期12卷 323-329页

作者： Xian Jiang Yang Liu Jiaxin Wang Yufei Wang Yuexin Xiong Qun Liu Naixu Li jiancheng zhou Gengtao Fu Dongmei Sun Yawen Tang School of Chemistry and Chemical Engineering Southeast University Nanjing 211189 China Jiangsu Key Laboratory of New Power Batteries Jiangsu Collaborative Innovation Centre of Biomedical Functional Materials School of Chemistry and Materials Science Nanjing Normal University Nanjing 210023 China School of Chemical and Biomedical Engineering Nanyang Technological University Singapore 637459 Singapore

Developing highly efficient bifunctional cathode and anode electrocatalysts is very important for the large-scale application of direct formic acid fuel cells. However, the high-cost and poor CO-tolera nee ability of the most commonly used Pt greatly block this process. To in crease the utilizatio n efficie ncy and exte nd bifunctional properties of precious Pt, herei n, coral-like Pt3Ag nano crystals are developed as an excelle nt bifunctional electrocatalyst through a facile one-pot solvothermal method. The formation mechanism of Ptgg nanocorals has been elaborated well via a series of control experiments. It is proved that 1-naphthol serving as a guiding surfactant plays a key role in the formation of high-quality nano corals. Thanks to the unique coral-like structure and alloy effects, the developed Ptgg nano corals present sign ificantly enhanced electrocatalytic properties (including activity, stability and CO-toleranee ability) towards both the cathodic oxygen reduction and anodic formic acid oxidati on, as compared with those of commercial Pt black and Pt-based nan oparticles. The prese nt synthetic method can also be extended to fabricate other bimetallic electrocatalysts with unique morphology and structure.

关键词： Pt3Ag alloy nanocorals bifunctional electrocatalyst oxygen reduction reaction formic acid oxidation

Synergetic photo-epoxidation of propylene with molecular oxygen over bimetallic Au–Ag/TS-1 photocatalysts

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 Catalysis 2017年第5期38卷 831-844页

作者： Naixu Li Bin Yang Ming Liu Yong Chen jiancheng zhou School of Chemistry and Chemical Engineering Southeast University Nanjing 211189 Jiangsu China Department of Chemical and Pharmaceutical Engineering Southeast University Chengxian College Nanjing 210088 Jiangsu China Jiangsu Province Hi‐Tech Key Laboratory for Bio‐medical Research Southeast University Nanjing 211189 Jiangsu China

Au-Ag bimetallic nanoparticle‐supported microporous titanium silicalite‐1catalysts were prepared via a hydrothermal‐immersion method,and their structures were *** materials serve as efficient catalysts for the photosynthesis of propylene oxide via the epoxidation of *** Au/Ag mass ratio and reaction temperature were demonstrated to have significant effects on the catalytic activity and selectivity of propylene *** optimal formation rate(68.3μmol/g·h)and selectivity(52.3%)toward propylene oxide were achieved with an Au:Ag mass ratio of4:***,the strong synergistic effect between Au and Ag resulted in superior photocatalysis of the bimetallic systems compared with those of the individual systems.A probable reaction mechanism was proposed based on the theoretical and experimental results.

关键词： Gold Silver Titanium silicalite‐1 Photocatalysis Propene epoxidation Synergetic effect

维普期刊数据库