以自制炭纸为基体,在其表面电化学合成聚苯胺纳米纤维网涂层,经过热处理后得到氮掺杂碳纳米纤维网/炭纸有序化气体扩散电极。采用扫描电镜(SEM)、透射电镜(TEM)、傅立叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)表征材料的形貌与结构特...以自制炭纸为基体,在其表面电化学合成聚苯胺纳米纤维网涂层,经过热处理后得到氮掺杂碳纳米纤维网/炭纸有序化气体扩散电极。采用扫描电镜(SEM)、透射电镜(TEM)、傅立叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)表征材料的形貌与结构特征,采用循环伏安法、线性扫描伏安法和交流阻抗谱研究材料的氧还原催化性能。结果表明,当n(苯胺单体)/n(盐酸)为0.4时,得到均匀、连续的网状聚苯胺纳米纤维网涂层,其结构在热处理后得到有效保留。与传统涂覆法制备的氮掺杂碳纤维/炭纸复合电极相比,有序化电极的氧还原性能更佳,欧姆阻抗和扩散阻抗更小。在O_2饱和的浓度为0.1 mol/L的KOH水溶液中,有序化电极的氧还原电流密度达到0.76 m A/cm^2,是传统电极的1.6倍。展开更多
In this study, macroscopic graphene-wrapped melamine foams （MF-G） were fabricated by an MF-templated layer-by-layer （LBL） assembly using graphene oxide as building blocks, followed by solution-processed reduction....In this study, macroscopic graphene-wrapped melamine foams （MF-G） were fabricated by an MF-templated layer-by-layer （LBL） assembly using graphene oxide as building blocks, followed by solution-processed reduction. By concisely duplicating sponge-like, highly ordered three-dimensional architectures from MF, the resulting MF-G with an interconnected graphene-based scaffold and tunable nanostructure was explored as compressible, robust electrodes for efficient energy storage. A thin layer of pseudocapacitive polypyrrole （PPy） was then attached and uniformly coated on MF-G, resulting in a well-defined core- double-shell configuration of the MF-G-PPy ternary composite sponges. The as-assembled devices exhibited enhancement of supercapacitor performance, with a high specific capacitance of 427 F·g-1 under a compressive strain of 75% and an excellent cycling stability with only 18% degradation after 5,000 charge- discharge cycles. Besides, the MF-G-PPy electrode maintained stable capacitance up to 100 compression-release cycles, with a compressive strain of 75%. These encouraging results thus provide a new route towards the low-cost, easily scalable fabrication of lightweight and deformation-tolerant electrodes.展开更多
A method for fabrication of the ordered carbon nanotube (CNT) film, which was template-synthesized within the highly ordered pores of a commercially available alumina template membrane, modified glassy carbon (CNIT/GC...A method for fabrication of the ordered carbon nanotube (CNT) film, which was template-synthesized within the highly ordered pores of a commercially available alumina template membrane, modified glassy carbon (CNIT/GC) electrode was established. The CNT/GC electrode showed excellent electrocatalytic activity toward dopamine electrochemical reaction without introducing any electrochemically active group into CNT film or activating the electrode electrochemically. DA undergoes ideal reversible electrochemical reaction on CNT/GC electrode at low scan rate ( less than or equal to 20 mV/s) with an excellent reproducibility and stability. The CNT/GC electrode might be used in biosensors because the highly ordered CNT may present a steric effect on more efficient redox reactions of biomolecules.展开更多
An ordered carbon nanotubes (CNTs) film, which was template-synthesized within the porous of an alumina template, modified glassy carbon electrode is fabricated. The electrode exhibits potent electrocatalysis for NAD...An ordered carbon nanotubes (CNTs) film, which was template-synthesized within the porous of an alumina template, modified glassy carbon electrode is fabricated. The electrode exhibits potent electrocatalysis for NADH oxidation in PBS (pH 6.8) with a diminution of the overpotential of more than 600 mV. The anodic peak current increases linearly with NADH concentration from 2?0-5 mol/L to 1?0-3 mol/L with the detection limit of about 5?0-7 mol/L.展开更多
以阿拉伯糖为碳源,介孔硅(SBA-15)为模板剂,用硬模板法制备有序介孔碳材料,采用场发射扫描电镜(Scanning Electron Microscopy,SEM)、透射电子显微镜(Transmission Electron Microscope,TEM)、全自动比表面及孔隙度分析仪(Brunner Emmet...以阿拉伯糖为碳源,介孔硅(SBA-15)为模板剂,用硬模板法制备有序介孔碳材料,采用场发射扫描电镜(Scanning Electron Microscopy,SEM)、透射电子显微镜(Transmission Electron Microscope,TEM)、全自动比表面及孔隙度分析仪(Brunner Emmet Teller,BET)、X射线衍射(X-ray Diffraction,XRD)、X射线光电子能谱(X-Ray photoelectron spectroscopy,XPS)对材料进行表征。用滴涂法将有序介孔碳悬浊液滴在裸玻碳电极表面,得到有序介孔碳修饰电极。用循环伏安法来研究盐酸奈福泮在有序介孔碳修饰的玻碳电极(Glassy Carbon Electrode,GCE)上的电化学行为。在最佳条件下,盐酸奈福泮浓度在1.0×10^(-8)~1.0×10^(-5)mol·L^(-1)范围内与峰电流呈线性关系,相关系数为R^(2)=0.9932,检出限为3.2×10^(-9) mol·L^(-1)。对盐酸奈福片中盐酸奈福泮进行了检测,样品加标回收率为96.84%~102.50%,RSD<5.0%。展开更多
文摘以自制炭纸为基体,在其表面电化学合成聚苯胺纳米纤维网涂层,经过热处理后得到氮掺杂碳纳米纤维网/炭纸有序化气体扩散电极。采用扫描电镜(SEM)、透射电镜(TEM)、傅立叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)表征材料的形貌与结构特征,采用循环伏安法、线性扫描伏安法和交流阻抗谱研究材料的氧还原催化性能。结果表明,当n(苯胺单体)/n(盐酸)为0.4时,得到均匀、连续的网状聚苯胺纳米纤维网涂层,其结构在热处理后得到有效保留。与传统涂覆法制备的氮掺杂碳纤维/炭纸复合电极相比,有序化电极的氧还原性能更佳,欧姆阻抗和扩散阻抗更小。在O_2饱和的浓度为0.1 mol/L的KOH水溶液中,有序化电极的氧还原电流密度达到0.76 m A/cm^2,是传统电极的1.6倍。
基金The authors gratefully acknowledge the National Natural Science Foundation of China （No. 21504012, 51125011 and 51433001） and the Fundamental Research Funds for the Central Universities of China （No. 16D110617）.
文摘In this study, macroscopic graphene-wrapped melamine foams （MF-G） were fabricated by an MF-templated layer-by-layer （LBL） assembly using graphene oxide as building blocks, followed by solution-processed reduction. By concisely duplicating sponge-like, highly ordered three-dimensional architectures from MF, the resulting MF-G with an interconnected graphene-based scaffold and tunable nanostructure was explored as compressible, robust electrodes for efficient energy storage. A thin layer of pseudocapacitive polypyrrole （PPy） was then attached and uniformly coated on MF-G, resulting in a well-defined core- double-shell configuration of the MF-G-PPy ternary composite sponges. The as-assembled devices exhibited enhancement of supercapacitor performance, with a high specific capacitance of 427 F·g-1 under a compressive strain of 75% and an excellent cycling stability with only 18% degradation after 5,000 charge- discharge cycles. Besides, the MF-G-PPy electrode maintained stable capacitance up to 100 compression-release cycles, with a compressive strain of 75%. These encouraging results thus provide a new route towards the low-cost, easily scalable fabrication of lightweight and deformation-tolerant electrodes.
基金ProjectsupportedbytheNaturalScienceFoundationofEducationCommitteeofJiangsuProvince (No .2 0 0 2HXXXLH170 1)
文摘A method for fabrication of the ordered carbon nanotube (CNT) film, which was template-synthesized within the highly ordered pores of a commercially available alumina template membrane, modified glassy carbon (CNIT/GC) electrode was established. The CNT/GC electrode showed excellent electrocatalytic activity toward dopamine electrochemical reaction without introducing any electrochemically active group into CNT film or activating the electrode electrochemically. DA undergoes ideal reversible electrochemical reaction on CNT/GC electrode at low scan rate ( less than or equal to 20 mV/s) with an excellent reproducibility and stability. The CNT/GC electrode might be used in biosensors because the highly ordered CNT may present a steric effect on more efficient redox reactions of biomolecules.
文摘An ordered carbon nanotubes (CNTs) film, which was template-synthesized within the porous of an alumina template, modified glassy carbon electrode is fabricated. The electrode exhibits potent electrocatalysis for NADH oxidation in PBS (pH 6.8) with a diminution of the overpotential of more than 600 mV. The anodic peak current increases linearly with NADH concentration from 2?0-5 mol/L to 1?0-3 mol/L with the detection limit of about 5?0-7 mol/L.
基金supported by Harbin Science and Technology Innovation Fund for Excellent Academic Leaders,China(2012RFXXG103)Fundamental Research Funds for the Central Universities,China(HEUCFT1205)Science and Technology Support Program of Jiangsu Province,China(BE2012152)~~
