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Study of the Diffusion Behavior of Seawater Absorption in Multi-Walled Carbon Nanotubes/Halloysite Nanotubes Hybrid Nanofillers Modified Epoxy-Based Glass/Carbon Fiber Composites
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作者 Praful Choudhari Vivek Kulkarni Sanjeevakumar Khandal 《Modern Mechanical Engineering》 2024年第2期25-38,共14页
In the maritime industry, cost-effective and lightweight Fiber Reinforced Polymer (FRP) composites offer excellent mechanical properties, design flexibility, and corrosion resistance. However, their reliability in har... In the maritime industry, cost-effective and lightweight Fiber Reinforced Polymer (FRP) composites offer excellent mechanical properties, design flexibility, and corrosion resistance. However, their reliability in harsh seawater conditions is a concern. Researchers address this by exploring three approaches: coating fiber surfaces, hybridizing fibers and matrices with or without nanofillers, and interply rearrangement. This study focuses on evaluating the synergistic effects of interply rearrangement of glass/carbon fibers and hybrid nanofillers, specifically Multi-walled carbon nanotubes (MWCNT) and Halloysite nanotubes (HNT). The aim is to enhance impact properties by minimizing moisture absorption. Hybrid nanocomposites with equal-weight proportions of two nanofillers: 0 wt.%, 1 wt.%, and 2 wt.% were exposed to seawater for 90 days. Experimental data was subjected to modelling through the application of Predictive Fick’s Law. The study found that the hybrid composite containing 2 wt.% hybrid nanofillers exhibited a 22.10% increase in impact performance compared to non-modified counterparts. After 90 days of seawater aging, the material exhibited enhanced resistance to moisture absorption (15.74%) and minimal reduction in impact strength (8.52%) compared to its dry strength, with lower diffusion coefficients. 展开更多
关键词 Glass/carbon Fiber Hybrid composites multiwall carbon nanotubes (MWCNTs) Halloysite nanotubes (HNTs) Diffusion Behaviour Impact Properties Seawater Aging
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New amperometric glucose biosensor by entrapping glucose oxidase into chitosan/nanoporous ZrO_2/multiwalled carbon nanotubes nanocomposite film 被引量:2
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作者 魏万之 翟秀荣 +2 位作者 曾金祥 高艳萍 龚淑果 《Journal of Central South University of Technology》 EI 2007年第1期73-77,共5页
A new nanocomposite material for construction of glucose biosensor was prepared. The biosensor was formed by entrapping glucose oxidase(Gox) into chitosan/nanoporous ZrO2/multiwalled carbon nanotubes nanocomposite fil... A new nanocomposite material for construction of glucose biosensor was prepared. The biosensor was formed by entrapping glucose oxidase(Gox) into chitosan/nanoporous ZrO2/multiwalled carbon nanotubes nanocomposite film. In this biosensing thin film, the multiwalled carbon nanotubes can effectively catalyze hydrogen peroxide and nanoporous ZrO2 can enhance the stability of the immobilized enzyme. The resulting biosensor provides a very effective matrix for the immobilization of glucose oxidase and exhibits a wide linear response range from 8 μmol/L to 3 mmol/L with a correlation coefficient of 0.994 for the detection of glucose. And the response time and detection limit of the biosensor are determined to be 6 s and 3.5 μmol/L, respectively. Another attractive characteristic is that the biosensor is inexpensive, stable and reliable. 展开更多
关键词 BIOSENSOR nanocomposite glucose oxidase nanoporous ZrO2 multiwalled carbon nanotubes chitosan
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Biodegradable Chitosan/Multiwalled Carbon Nanotube Composite for Bone Tissue Engineering
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作者 Imelda Olivas-Armendariz Santos Adriana Martel-Estrada +3 位作者 Mónica E. Mendoza-Duarte Florinda Jiménez-Vega Perla García-Casillas Carlos A. Martínez-Pérez 《Journal of Biomaterials and Nanobiotechnology》 2013年第2期204-211,共8页
In this work the influence of multiwalled carbon nanotubes (MWCNT) on mechanical properties was evaluated also the osteoinduction mechanism in Chitosan/MWCNT composite is reported. The morphology and the mechanical pr... In this work the influence of multiwalled carbon nanotubes (MWCNT) on mechanical properties was evaluated also the osteoinduction mechanism in Chitosan/MWCNT composite is reported. The morphology and the mechanical properties of the scaffolds were controlled by varying solvent ratios, quenching temperatures and carbon nanotubes concentration. In vitro cell culture of Sprague-Dawley rat’s osteoblasts was used to evaluate the phenotype expression of cells in the scaffolds. The presence of MWCNT in a chitosan matrix improving its mechanical properties and sustain osteoblast growth and differentiation that represent a potential application of the Chitosan/MWCNT as biomaterial for bone tissue engineering. 展开更多
关键词 BONE TISSUE REGENERATION chitosan multiwalled carbon nanotubes composite
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Development of Chitosan/Poly(L-Lactide)/Multiwalled Carbon Nanotubes Scaffolds for Bone Tissue Engineering
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作者 A. De la Paz Orozco F. Jiménez Vega +5 位作者 S. A. Martel-Estrada A. Hernández Aguilar M. E. Mendoza-Duarte M. C. Chavarría-Gaytán C. A. Rodríguez-González I. Olivas-Armendáriz 《Open Journal of Regenerative Medicine》 2016年第1期14-23,共10页
This work focuses to improve the mechanical properties and investigates the growth of osteoblasts on a degradable chitosan/poly(L-lactide)/carbon nanotubes composite for tissue engineering. The morphological and mecha... This work focuses to improve the mechanical properties and investigates the growth of osteoblasts on a degradable chitosan/poly(L-lactide)/carbon nanotubes composite for tissue engineering. The morphological and mechanical properties characterizations were performed using scanning electronic microscopy (SEM) and rheometrics analysis system (RSA). Osteoblasts differentiation was determined by alkaline phosphatase activity, total number cells by an Alamar Blue assay, cell attachment and proliferation were visualized qualitatively using SEM, mineralization was characterized by transformed infrared spectroscopy, energy dispersive spectroscopy, and X-ray diffraction. The results suggest that the chitosan/poly(L-lactide)/multiwalled carbon nanotubes composites exhibit the ability to promote cell adhesion, proliferation, and differentiation on their surface. 展开更多
关键词 chitosan Poly(L-Lactide) multiwalled carbon nanotubes Mechanical Properties BIOCOMPATIBILITY
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Vapor-grown carbon fibers enhanced sulfur-multi walled carbon nanotubes composite cathode for lithium/sulfur batteries 被引量:3
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作者 邓兆丰 张治安 +4 位作者 卢海 赖延清 刘晋 李劼 刘业翔 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第1期158-163,共6页
Vapor-grown carbon fibers (VGCFs) were introduced as conductive additives for sulfur-multiwalled carbon nanotubes (S-MWCNTs) composite cathode of lithium-sulfur batteries. The performance of S-MWCNTs composite cat... Vapor-grown carbon fibers (VGCFs) were introduced as conductive additives for sulfur-multiwalled carbon nanotubes (S-MWCNTs) composite cathode of lithium-sulfur batteries. The performance of S-MWCNTs composite cathodes with carbon black and VGCFs as sole conductive additives was investigated using scanning electron microscopy (SEM), galvanostatic charge-discharge tests and electrochemical impedance spectroscopy (EIS). The results show that the S-MWCNTs composite cathode with VGCFs displays a network-like morphology and exhibits higher activity and better cycle durability compared with the composite cathode with carbon black, delivering an initial discharge capacity of 1254 mA&#183;h/g and a capacity of 716 mA&#183;h/g after 40 cycles at 335 mA/g. The interconnected VGCFs can provide a stable conductive network, suppress the aggregation of cathode materials and residual lithium sulfide and maintain the porosity of cathode, and therefore the electrochemical performance of S-MWCNTs composite cathode is enhanced. 展开更多
关键词 lithium-sulfur batteries carbon fiber composite cathode multiwalled carbon nanotube
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Laccase biosensor using magnetic multiwalled carbon nanotubes and chitosan/silica hybrid membrane modified magnetic carbon paste electrode 被引量:1
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作者 庞娅 曾光明 +3 位作者 汤琳 章毅 李贞 陈丽娟 《Journal of Central South University》 SCIE EI CAS 2011年第6期1849-1856,共8页
A simple and rapid strategy to construct laccase biosensor for determination of catechol was investigated. Magnetic multiwalled carbon nanotubes (MMCNT) which possess excellent capability of electron transfer were pre... A simple and rapid strategy to construct laccase biosensor for determination of catechol was investigated. Magnetic multiwalled carbon nanotubes (MMCNT) which possess excellent capability of electron transfer were prepared by chemical coprecipitation method. Scanning electron microscope (SEM) and vibrating sample magnetometer (VSM) were used to identify its surfacetopography and magnetization, respectively. Laccase was immobilized on the MMCNT modified magnetic carbon paste electrode by the aid of chitosan/silica (CS) hybrid membrane. Using current-time detection method, the biosensor shows a linear response related to the concentration of catechol in the range from 10-7 to 0.165×10-3 mol/L. The corresponding detection limit is 3.34×10-8 mol/L based on signal-to-noise ratios (S/N) ≥3 under the optimized conditions. In addition, its response current retains 90% of the original after being stored for 45 d. The results indicate that this proposed strategy can be expected to develop other enzyme-based biosensors. 展开更多
关键词 magnetic multiwalled carbon nanotubes PARAMAGNETISM chitosan/silica sol laccase biosensor catechol
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Synthesis and thermal stability of multiwall carbon nanotubes reinforced aluminum metal matrix composites
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作者 张学习 邓春锋 +1 位作者 王德尊 耿林 《中国有色金属学会会刊:英文版》 CSCD 2005年第S2期240-244,共5页
Multiwall carbon nanotubes(MWNTs) reinforced aluminum composites were synthesized by hot press sintering. The thermal stability of MWNTs in the composite was investigated by transmission electron microscopy(TEM). ... Multiwall carbon nanotubes(MWNTs) reinforced aluminum composites were synthesized by hot press sintering. The thermal stability of MWNTs in the composite was investigated by transmission electron microscopy(TEM). The results show that the impurities drop from 2% to 0.11% after the MWNTs are soaked with 95%H2SO4 and 66%HNO4 acids in an ultrasonator and washed with distilled water. In hot pressed composites, MWNTs distribute between aluminum powders and do not react with aluminum. When the composite was held at 800℃ for 1h, MWNTs react with aluminum and form Al4C3 phase, which are small polygons and distribute in the aluminum grains. Although Al4C3 phase still forms when the composite was held at 1000℃ for 1h, its morphology changes to a continuous band and distributes along the origin aluminum powder boundaries. So MWNTs are unstable in aluminum matrix composites that are kept above the liquidus temperature of aluminum. 展开更多
关键词 ALUMINUM matrix composite multiwall carbon nanotubes(MWNTs) PURIFICATION
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Electroless deposition of Cu on multiwalled carbon nanotubes 被引量:6
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作者 YUAN Dingsheng LIU Yingliang 《Rare Metals》 SCIE EI CAS CSCD 2006年第3期237-240,共4页
Copper has been deposited on the surface of multiwailed carbon nanombes (MWNTs) and inside MWNTs by electroless deposition. The as-prepared Cu-MWNT composite materials have been characterized by X-ray diffractometer... Copper has been deposited on the surface of multiwailed carbon nanombes (MWNTs) and inside MWNTs by electroless deposition. The as-prepared Cu-MWNT composite materials have been characterized by X-ray diffractometer (XRD), transmission electron microscopy (TEM), and electrochemical measurement. XRD analyses showed that Cu was a face-centered cubic (fcc) structure. The average size of Cu was calculated by Scherrer's formula from XRD data, and it was 11 nm. TEM revealed that Cu grains on the surface of MWNTs were uniform with the sizes of about 30-60 nm. The electrochemical measurement indicated that Cu-MWNT composite materials possessed fine electron conductivity. 展开更多
关键词 inorganic chemistry composite materials electroless deposition multiwalled carbon nanotubes
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Glass-Reinforced Plastic Filled by Multiwall Carbon Nanotubes and Their Modified Forms
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作者 Yurii Sementsov Oksana Cherniuk +4 位作者 Galyna Dovbeshko Serhii Zhuravskyi Stanislav Makhno Bo Wang Mykola Kartel 《Journal of Materials Science and Chemical Engineering》 2019年第7期26-35,共10页
The effect of modifying the surface of multiwall carbon nanotubes (CNT’s) by oxygen and nitrogen on the strength characteristics of the fiberglass filled with them was investigated by testing for tension and bending.... The effect of modifying the surface of multiwall carbon nanotubes (CNT’s) by oxygen and nitrogen on the strength characteristics of the fiberglass filled with them was investigated by testing for tension and bending. The method of obtaining nitrogen-containing nanostructures is developed. It was shown that in the epoxide system LR285-LH286 hydrophobic CNT’s (outgoing) at introducing into the catalyst polymerization of LH286, increase the strength with respect to unreinforced CNT’s by 48% - 54%. Oxidized CNT’s (200 A?h/kg) introduced into the resin LR285 increase the strength by 59%. The distribution of the filler particles in size, both in the epoxy resin and in the catalyst, depends on their concentration nonlinear, and correlates with the strength characteristics of the composite. 展开更多
关键词 FIBERGLASS multiwall carbon nanotubes POLYMER composite Materials
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A glance on the effects of temperature on axisymmetric dynamic behavior of multiwall carbon nanotubes
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作者 S.T.Talebian M.Tahani +1 位作者 M.H.Abolbashari S.M.Hosseini 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2012年第3期720-728,共9页
In this paper the effects of temperature on the radial breathing modes (RBMs) and radial wave propaga- tion in multiwall carbon nanotubes (MWCNTs) are inves- tigated using a continuum model of multiple elastic iso... In this paper the effects of temperature on the radial breathing modes (RBMs) and radial wave propaga- tion in multiwall carbon nanotubes (MWCNTs) are inves- tigated using a continuum model of multiple elastic isotropic shells. The van der Waals forces between tubes are simulated as a nonlinear function of interlayer spacing of MWCNTs. The governing equations are solved using a finite element method. A wide range of innermost radius-to-thickness ratio of MWCNTs is considered to enhance the investigation. The presented solution is verified by comparing the results with those reported in the literature. The effects of temperature on the van der Waals interaction coefficient between layers of MWCNTs are examined. It is found that the variation of the van der Waals interaction coefficient at high temperature is sensible. Subsequently, variations of RBM frequencies and radial wave propagation in MWCNTs with temperatures up to 1 600 K are illustrated. It is shown that the thick MWC- NTs are more sensible to temperature than the thin ones. 展开更多
关键词 multiwall carbon nanotube Radial wave propa-gation. Radial breathing modes - van der Waals force. Ther-mal effects
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Electrocatalytic Reduction of Oxygen at Perovskite (BSCF)-MWCNT Composite Electrodes
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作者 Farhanini Yusoff Norita Mohamed +1 位作者 Azizan Aziz Sulaiman Ab Ghani 《Materials Sciences and Applications》 2014年第4期199-211,共13页
A composite paste electrode based on Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF)—initially synthesized by solgel method—and multiwall carbon nanotube (MWCNT) as a cathode in fuel cells is developed. The composite pastes are pr... A composite paste electrode based on Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF)—initially synthesized by solgel method—and multiwall carbon nanotube (MWCNT) as a cathode in fuel cells is developed. The composite pastes are prepared by the direct mixing of BSCF:MWCNT at 90:10, 80:20 and 70:30 (% w/W). These electrodes are then characterized by the x-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption-desorption isotherm, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The XRD and SEM confirm the inclusion and the uniform dispersal of the MWCNT within BSCF, respectively. The nitrogen adsorption isotherm study shows that the porosity of the composite paste electrode has been improved by two-fold from the BSCF electrode. The EIS and CV demonstrate that the higher ratios of MWCNT in the composites are critical in improving the electronic conductivity as well as the kinetics. It is also noticeable that the electrode has increased the catalysis of oxygen in 0.1 M KOH (pH 12.0). Cyclic voltammetric studies on the oxygen reduction reaction (ORR) suggest that the incorporation of MWCNT is vital in improving the electrode (cathode) properties of a fuel cell. 展开更多
关键词 Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) CATALYSIS composites multiwall carbon nanotubE (MWCNT) OXYGEN Reduction Reaction
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Synthesis, Characterization and Gas Sensing Properties of Graphene Oxide-Multiwalled Carbon Nanotube Composite 被引量:7
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作者 T. Kavinkumar S. Manivannan 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2016年第7期626-632,共7页
Graphene oxide (GO)-multiwalled carbon nanotube (MWCNT) composite was synthesized and characterized by X-ray diffraction, atomic force microscopy, scanning electron microscopy, micro Raman, Fourier transform infra... Graphene oxide (GO)-multiwalled carbon nanotube (MWCNT) composite was synthesized and characterized by X-ray diffraction, atomic force microscopy, scanning electron microscopy, micro Raman, Fourier transform infrared and ultraviolet-visible near infrared spectroscopy techniques. Spectral characteris- tics of cladding modified fiber optic gas sensors were studied for various concentrations of ammonia, ethanol and methanol at 27 ℃. Thickness of the gas sensing layer was controlled by varying the concentration of composite in ethanol medium (0.5 and 1 mg/mL) for three times dipping process. The O.S mg/ mL concentrated GO-MWCNT coated sensor showed 1.20, 1.40 and 1.15 times higher sensitivity than the GO coated sensor for ammonia, ethanol and methanol vapors, respectively. Furthermore, it exhibited 1.50, 1.80 and 1.80 times better sensitivity than 1 mg/mL concentrated GO-MWCNT coated sensor for ammonia, ethanol and methanol vapors, respectively. The presence of functional groups in GO increased the sen- sitivity. This is mainly attributed to the effective electron charge transfer between the composite materials and analytes. 展开更多
关键词 Graphene oxide (GO) multiwalled carbon nanotube (MWCNT) Fiber optic gas sensor GO-MWCNT composite
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基于CMWCNT/Nafion的增强型离子聚合物金属复合材料的制备及致动性能 被引量:1
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作者 李帆 李廷鱼 +2 位作者 李朋伟 李银辉 郭丽芳 《微纳电子技术》 CAS 2024年第3期59-67,共9页
离子聚合物金属复合材料(IPMC)是一种新型的电活性材料,具有体积小、质量轻、驱动电压低等优点,但驱动力小、稳定工作时间短等问题限制着其柔性致动性能。提出了一种基于银基IPMC的增强型致动器,通过在IPMC的基底聚合物中掺杂羧基化多... 离子聚合物金属复合材料(IPMC)是一种新型的电活性材料,具有体积小、质量轻、驱动电压低等优点,但驱动力小、稳定工作时间短等问题限制着其柔性致动性能。提出了一种基于银基IPMC的增强型致动器,通过在IPMC的基底聚合物中掺杂羧基化多壁碳纳米管(CMWCNT),来提高IPMC的整体机械性能和致动性能。其中,掺杂质量分数0.5%CMWCNT的IPMC的最大尖端位移和驱动力分别增加至未优化银基IPMC的1.60倍与2.32倍,该性能的提升归因于CMWCNT良好的导电性和羧基对水合阳离子迁移的加速作用。与未优化的银基IPMC相比,掺杂质量分数0.5%CMWCNT时IPMC驱动速率可提升至3.57倍。研究结果可为IPMC在各领域的应用发展提供参考。 展开更多
关键词 离子聚合物金属复合材料(IPMC) 增强型致动器 羧基化多壁碳纳米管(CMWCNT) 柔性致动性能 电活性材料
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Stripping voltammetric determination of Cd(Ⅱ)based on multiwalled carbon nanotube functionalized with 1-(2-pyridylazo)-2-naphthol 被引量:1
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作者 Alireza Mohadesi Hadi Beitollahi Mohammad Ali Karimi 《Chinese Chemical Letters》 SCIE CAS CSCD 2011年第12期1469-1472,共4页
The present work has focused on the modification of multiwalled carbon nanotube with a ligand,l-(2-pyridylazo)-2-naphthol, and its potential application for the development of a new,simple and selective modified gla... The present work has focused on the modification of multiwalled carbon nanotube with a ligand,l-(2-pyridylazo)-2-naphthol, and its potential application for the development of a new,simple and selective modified glassy carbon electrode for stripping voltammetric determination of Cd(Ⅱ).The analytical curve for Cd(Ⅱ) ions covered the linear range varying from 0.8 up to 220.4μgL^(-1).The limit of detection was found to be 0.1μgL^(-1),while the relative standard deviation(RSD) at 50.0μgL^(-1) was 1.8%(n=5).This modified electrode was successfully applied for determination of Cd(Ⅱ) in some water samples. 展开更多
关键词 multiwalled carbon nanotube 1-(2-Pyridylazo)-2-naphthol Cadmium(Ⅱ) Stripping voltammetry
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羧基化多壁碳纳米管对T-1000碳纤维/环氧树脂复合材料性能的影响 被引量:25
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作者 田继斌 梁胜彪 +1 位作者 隋刚 杨小平 《玻璃钢/复合材料》 CAS CSCD 2010年第1期36-39,45,共5页
对多壁碳纳米管进行了表面羧基化处理,将羧基化碳纳米管添加到环氧树脂基体中,通过湿法缠绕工艺制备出具有高性能的T1000碳纤维增强环氧树脂复合材料。结果表明,复合材料的界面性能和耐热性能得到改善,当羧基化碳纳米管质量含量为1%时,... 对多壁碳纳米管进行了表面羧基化处理,将羧基化碳纳米管添加到环氧树脂基体中,通过湿法缠绕工艺制备出具有高性能的T1000碳纤维增强环氧树脂复合材料。结果表明,复合材料的界面性能和耐热性能得到改善,当羧基化碳纳米管质量含量为1%时,复合材料的层间剪切强度提高了近29%。 展开更多
关键词 多壁碳纳米管 环氧树脂 复合材料 化学处理
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基于纳米金与碳纳米管-纳米铂-壳聚糖纳米复合物固定癌胚抗原免疫传感器的研究 被引量:25
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作者 闵丽根 袁若 +3 位作者 柴雅琴 陈时洪 许阳 付萍 《化学学报》 SCIE CAS CSCD 北大核心 2008年第14期1676-1680,共5页
采用纳米金(nano-Au)、多壁碳纳米管-纳米铂-壳聚糖的纳米复合物(MWNT-Pt-CS)及电子媒介体硫堇(Th)固载抗体制得高灵敏癌胚抗原免疫传感器.首先,于壳聚糖溶液中用NaBH4还原H2PtCl6,并将多壁碳纳米管分散于其中制得碳纳米管-纳米铂-壳聚... 采用纳米金(nano-Au)、多壁碳纳米管-纳米铂-壳聚糖的纳米复合物(MWNT-Pt-CS)及电子媒介体硫堇(Th)固载抗体制得高灵敏癌胚抗原免疫传感器.首先,于壳聚糖溶液中用NaBH4还原H2PtCl6,并将多壁碳纳米管分散于其中制得碳纳米管-纳米铂-壳聚糖纳米复合物,并将其滴涂在玻碳电极上成膜;然后,吸附电子媒介体硫堇制得硫堇/碳纳米管-纳米铂-壳聚糖(Th/MWNT-Pt-CS)修饰电极.利用壳聚糖和硫堇分子中大量的氨基固定纳米金并吸附癌胚抗体(anti-CEA);最后,用辣根过氧化物酶(HRP)封闭活性位点从而制得高灵敏电流型免疫传感器.在优化的实验条件下,该传感器响应的峰电流值与癌胚抗原(carcinoembryonic antigen)浓度在0.5~10和10~120ng/mL的范围内保持良好的线性关系,检测限为0.2ng/mL. 展开更多
关键词 免疫传感器 癌胚抗原 纳米金 多壁碳纳米管纳米铂-壳聚糖复合物
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壳聚糖-碳纳米管修饰电极的电催化作用研究 被引量:9
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作者 杨丽珠 姜灵彦 陆光汉 《分析科学学报》 CAS CSCD 2007年第4期457-460,共4页
报道了一种新型的壳聚糖-碳纳米管修饰电极(MC/GCE)的电化学特性。此修饰电极对神经递质去甲肾上腺素(NE)表现出很强的电催化效应,在pH 5.5的磷酸盐缓冲溶液中,NE的峰电流与浓度在5.0×10-6~1.0×10-4mol/L范围内呈线性关系。... 报道了一种新型的壳聚糖-碳纳米管修饰电极(MC/GCE)的电化学特性。此修饰电极对神经递质去甲肾上腺素(NE)表现出很强的电催化效应,在pH 5.5的磷酸盐缓冲溶液中,NE的峰电流与浓度在5.0×10-6~1.0×10-4mol/L范围内呈线性关系。此外,其它生物分子如多巴胺(DA)、尿酸(UA)在MC/GCE上也有很好的电化学响应。修饰电极表现出很好的稳定性和选择性。 展开更多
关键词 壳聚糖 碳纳米管 修饰电极 肾上腺素 多巴胺 尿酸
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β环糊精-碳纳米管/壳聚糖自组装膜修饰电极在过量抗坏血酸存在下测定多巴胺 被引量:4
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作者 杨怀成 魏万之 《分析试验室》 CAS CSCD 北大核心 2009年第9期5-8,共4页
基于β环糊精和碳纳米管可通过范德华力形成复合物,利用壳聚糖分子以静电引力吸附富集碳纳米管-β环糊精,采用层层自组装制备了β环糊精.碳纳米管/壳聚糖玻碳修饰电极,并研究了多巴胺在修饰电极上的电化学行为。在抗坏血酸和多巴... 基于β环糊精和碳纳米管可通过范德华力形成复合物,利用壳聚糖分子以静电引力吸附富集碳纳米管-β环糊精,采用层层自组装制备了β环糊精.碳纳米管/壳聚糖玻碳修饰电极,并研究了多巴胺在修饰电极上的电化学行为。在抗坏血酸和多巴胺共存体系中,二者的氧化峰电位相差约163mv,据此建立了多巴胺的电化学选择性测定,峰电流与浓度在1.0×10^-6~7.0×10^-5mol/L范围内呈良好的线性关系,检出限为0.3umol/L。 展开更多
关键词 Β环糊精 多壁碳纳米管 壳聚糖 多巴胺 抗坏血酸 自组装膜
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复合电沉积Ni-MWCNTs及镍电结晶的研究 被引量:1
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作者 冯辉 张勇 +4 位作者 卫应亮 陈俭民 崔亚锋 张天记 冯少彬 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2009年第2期229-232,共4页
研究了水平阴极方式复合电沉积Ni-MWCNTs(Ni-多壁碳纳米管)。采用硫酸镍基础电解液,添加适当表面活性剂和光亮剂,MWCNTs为2~2.5g/L,电流密度为2.5A/dm2时,获得的Ni-MWCNTs沉积层结构致密,复合沉积层中MWCNTs含量达22.45%。复合电沉积... 研究了水平阴极方式复合电沉积Ni-MWCNTs(Ni-多壁碳纳米管)。采用硫酸镍基础电解液,添加适当表面活性剂和光亮剂,MWCNTs为2~2.5g/L,电流密度为2.5A/dm2时,获得的Ni-MWCNTs沉积层结构致密,复合沉积层中MWCNTs含量达22.45%。复合电沉积层表面微观形貌照片显示,MWCNTs在复合电沉积层中占主要体积,镍的电结晶形态呈球形,结晶点位置位于MWCNTs管壁缺陷处及部分管端处,MWCNTs的管端和管壁缺陷处的Ni晶粒相互连接,形成牢固的复合沉积层。复合电沉积层中MWCNTs含量受电解液中MWCNTs浓度、电流密度以及光亮剂影响,在MWCNTs上的Ni沉积层连续性直接受MWCNTs管壁上缺陷的数量和连续性影响,形成晶核的缺陷尺度至少在1nm以上。 展开更多
关键词 复合电沉积 多壁碳纳米管 水平阴极方式 电结晶
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用纳米铂-多壁碳纳米管-壳聚糖修饰玻碳电极计时电流法测定过氧化氢 被引量:1
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作者 黄小梅 邓祥 +1 位作者 吴狄 唐静 《理化检验(化学分册)》 CAS CSCD 北大核心 2013年第9期1042-1045,共4页
将多壁碳纳米管(MWCNT's)1mg分散在5g·L^(-1)壳聚糖溶液中,并滴涂在玻碳电极表面,将上述电极置于氯铂酸(1+99)溶液中,于电位-0.2V下电沉积90s,制得纳米铂-多壁碳纳米管-壳聚糖修饰玻破电极(nanoPt/MWCNT's-CTS/GCE)。采用... 将多壁碳纳米管(MWCNT's)1mg分散在5g·L^(-1)壳聚糖溶液中,并滴涂在玻碳电极表面,将上述电极置于氯铂酸(1+99)溶液中,于电位-0.2V下电沉积90s,制得纳米铂-多壁碳纳米管-壳聚糖修饰玻破电极(nanoPt/MWCNT's-CTS/GCE)。采用扫描电子显微镜对该电极表面结构进行了表征,并用循环伏安法和计时电流法对该电极的电化学性能进行了研究。试验表明:在pH 7.0的0.1mol·L^(-1)磷酸盐底液中,该传感器对过氧化氮具有明显的电催化还原作用。过氧化氢浓度在6.30×10^(-7)~1.52×10^(-3)mol·L^(-1)范围内与还原峰电流呈线性关系,检出限(3S/N)为2.13X10^(-1)mol·L^(-1)。对0.35邪mmol·L^(-1)过氧化氢标准溶液连续测定8次,测定值的相对标准偏差(n=8)为0.27%。 展开更多
关键词 多壁碳纳米管 纳米铂 壳聚糖 玻碳电极 过氧化氢
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