纳米金-铂/碳纤维复合材料的制备及其修饰电极性能研究
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摘要
通过静电纺丝法制备聚丙烯腈纤维(PANF)并高温碳化以获得碳纳米纤维(CNF),利用水热法将纳米铂(PtNPs)负载于CNF表面得到Pt/CNF复合材料,将其固定于电极表面之后进一步利用电沉积法将纳米金(AuNPs)形成于Pt/CNF表面得到修饰电极(Au/Pt/CNF/CILE)。通过扫描电镜考察复合材料的形貌结构,利用电化学方法研究修饰电极的电化学性能,求解其有效面积。结果表明CNF呈网状结构,PtNPs稳定附着在纤维表面,电沉积的AuNPs均匀分布在Pt/CNF/CILE表面,所制备的修饰电极的导电性能增强、有效面积增大且表面丰富的电活性位点促进了电子的有效转移。
Polyacrylonitrile fiber(PANF) was prepared by electrospinning, and further transformed into carbon nanofiber(CNF) by high temperature carbonization. Then platinum nanoparticles(PtNPs) were loaded on CNF surface by hydrothermal method to obtain the Pt/CNF composite, which was immobilized on the surface of carbon ionic liquid electrode(CILE).Then gold nanoparticles(AuNPs) were formed on Pt/CNF surface by electrodeposition to construct a modified electrode(Au/Pt/CNF/CILE). The morphology of nanocomposite was characterized by SEM and the electrochemical properties of modified electrode were investigated by various electrochemical methods with the effective area measured. The results showed that CNF had a spatial network structure with PtNPs successfully loaded, and the formation of AuNPs on Pt/CNF/CILE surface resulted in the increase of the conductivity and effective area, which provided more electroactive sites for the electron transfer.
Polyacrylonitrile fiber(PANF) was prepared by electrospinning, and further transformed into carbon nanofiber(CNF) by high temperature carbonization. Then platinum nanoparticles(PtNPs) were loaded on CNF surface by hydrothermal method to obtain the Pt/CNF composite, which was immobilized on the surface of carbon ionic liquid electrode(CILE).Then gold nanoparticles(AuNPs) were formed on Pt/CNF surface by electrodeposition to construct a modified electrode(Au/Pt/CNF/CILE). The morphology of nanocomposite was characterized by SEM and the electrochemical properties of modified electrode were investigated by various electrochemical methods with the effective area measured. The results showed that CNF had a spatial network structure with PtNPs successfully loaded, and the formation of AuNPs on Pt/CNF/CILE surface resulted in the increase of the conductivity and effective area, which provided more electroactive sites for the electron transfer.
引文
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[2] BABITHA S,RACHITA L,KARTHIKEYAN K,et al. Electrospun protein nanofibers in healthcare:a review[J]. International Journal of Pharmaceutics,2017,523(1):52-90.
[3] ZHANG B,KANG F Y,TARASCON J M,et al. Recent advances in electrospun carbon nanofibers and their application in electrochemical energy storage[J]. Progress in Materials Science,2016,76:319-380.
[4] JI L W,ZHANG X W. Fabrication of porous carbon nanofibers and their application as anode materials for rechargeable lithiumIon batteries[J]. Nanotechnology,2009,20(15):155705.
[5] HUANG Z M,ZHANG Y Z,KOTAKI M,et al. A review on polymer nanofibers by electrospinning and their applications in nanocomposites[J]. Composites Science and Technology,2003,63(15):2223-2253.
[6] TEO W E,RAMAKRISHNA S. A review on electrospinning design and nanofibre assemblies[J]. Nanotechnology,2006,17(14):R89-R106.
[7] THENMOZHI S,DHARMARAJ N,KADIRVELU K,et al. Electrospun nanofibers:new generation materials for advanced applications[J]. Materials Science and Engineering:B,2017,217:36-48.
[8] NATARAJ S K,KIM B H,DELA CRUZ M,et al. Free standing thin webs of porous carbon nanofibers of polyacrylonitrile containing iron-oxide by electrospinning[J]. Materials Letters,2009,63(2):218-220.
[9] ZHANG X P,LIU D,YU B,et al. A novel nonenzymatic hydrogen peroxide sensor based on electrospun nitrogen-doped carbon nanoparticles-embedded carbon nanofibers film[J]. Sensors and Actuators B:Chemical,2016,224:103-109.
[10] MONDAL K,ALI M A,AGRAWAL V V,et al. Highly sensitive biofunctionalized mesoporous electrospun TiO2nanofiber based interface for biosensing[J]. ACS Applied Materials&Interfaces,2014,6(4):2516-2527.
[11] RANJBAR S,SHAHROKHIAN S. Design and fabrication of an electrochemical aptasensor using Au nanoparticles/carbon nanoparticles/cellulose nanofibers nanocomposite for rapid and sensitive detection of Staphylococcus aureus[J]. Bioelectrochemistry,2018,123:70-76.
[12] ER E，?ELIKKAN H,ERK N. A novel electrochemical nano-platform based on graphene/platinum nanoparticles/nafion composites for the electrochemical sensing of metoprolol[J]. Sensors and Actuators B:Chemical,2017,238:779-787.
[13] OUYANG R Z,BRAGG S A,CHAMBERS J Q,et al. Flower-like self-assembly of gold nanoparticles for highly sensitive electrochemical detection of chromium(VI)[J]. Analytica Chimica Acta,2012,722:1-7.
[14] DING Y,KIM Y J,ERLEBACHER J. Nanoporous gold leaf:“ancient technology”/advanced material[J]. Advanced Materials,2004,16(21):1897-1900.
[15]孙伟，王丹，张媛媛，等.电化学沉积纳米金和石墨烯修饰离子液体碳糊电极检测芦丁的研究[J].分析化学，2013,41(5):709-713.
[16] OLDHAM K. Analytical expressions for the reversible Randles-Sevcik function[J]. Journal of Electroanalytical Chemistry,1979,105(2):373-375.
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