Electrochemical application of titanium dioxide nanoparticle/gold nanoparticle/multiwalled carbon nanotube nanocomposites for nonenzymatic detection of ascorbic acid

Li, Hongji; Li, Mingji; Guo, Wenlong; Di, Hairong; Fang, Changri; Yang, Baohe

doi:10.1007/s10008-013-2277-y

Cited by 19 publications

(7 citation statements)

References 46 publications

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“…Furthermore, their adsorptive, catalytic and electron transfer properties has improved by chemical functionalization. The side wall and terminal functionalization of MWCNTs also provides free sites for further modification and ideal support for addition of metal nanoparticle . The unique chemical and physical properties of metal nanoparticles make it a better candidate as modifying material for development of electrochemical sensor.…”

Section: Introductionmentioning

confidence: 99%

Design of Electrochemically Modified fMWCNT‐pencil Graphite Electrode Decorated with Cu and Ag Nanofilm and its Electrocatalytic Behavior Towards Imazethapyr

2017

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Herein, a facile procedure was developed for designing an electrochemical sensor based on pencil graphite electrode modified with electrochemically synthesized silver and copper nanoparticles (AgNP and CuNP) supported on functionalized multiwalled carbon nanotubes (fMWCNTs). The electrochemical and morphological characterization was carried out by cyclic voltammetry, Electrochemical Impedance Spectroscopy, Powder X‐ray diffraction, Field Emission Scanning Electron Microscopy, Transmission electron microscopy and Atomic Force Microscopy. The designed sensor exhibited electrocatalytic behavior towards the reduction of Imazethapyr. Results indicates the combination of AgNPs, CuNPs and fMWCNTs on PGE produced remarkable enhancement in electrocatalytic and sensing properties. Various electro‐kinetic parameters like Rct, kapp, n, α, E0, k0, Γ, D and k have been evaluated by CV, impedance and Chronoamperometric studies. The electrochemical performance was improved by optimizing the effect of pH, scan rate, amount of fMWCNTs and deposition parameters of AgNP and CuNP. The sensor was efficaciously applied for determination of Imazethapyr and exhibited a linear correlation in the concentration range of 0.01–5.0 μg mL−1 with low detection limits, 0.159 ng mL−1 using AdSWV. The fabricated sensor exhibited good accuracy, acceptable stability and high efficacy for quantitative determination of Imazethapyr in real samples with notable recoveries ranging from 98 % to 100.2 %.

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Section: Introductionmentioning

confidence: 99%

Design of Electrochemically Modified fMWCNT‐pencil Graphite Electrode Decorated with Cu and Ag Nanofilm and its Electrocatalytic Behavior Towards Imazethapyr

2017

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“…In the case of AuNPs (Figure B), an interplanar distance of ∼0.23 nm indicates the presence of (111) plane of the face centered cubic (fcc) structure of gold . On the other hand, Figure D shows the presence of the interplanar distance (∼0.35 nm) for titania nanoparticles, which corresponds to (101) planes of the anatase structure . Finally, the crystallinity of the sample was detected from live Fast Fourier Transform for both nanoparticles AuNPs (Figure C) and TiO 2 NPs (Figure E).…”

Section: Resultsmentioning

confidence: 97%

“…48 On the other hand, Figure 5D shows the presence of the interplanar distance (∼0.35 nm) for titania nanoparticles, which corresponds to (101) planes of the anatase structure. 49 Finally, the crystallinity of the sample was detected from live Fast Fourier Transform for both nanoparticles AuNPs (Figure 5C) and TiO 2 NPs (Figure 5E). This preliminary crystalline characterization was corroborated with XRD measurements.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Synthesis of Au Nanoparticles Assisted by Linker-Modified TiO₂ Nanoparticles

et al. 2018

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Plasmonic nanoparticles, especially gold ones, have been widely employed as photosensitizers in photoelectrovoltaic or photocatalytic systems. To improve the system's performance, a greater interaction of the nanoparticles with the semiconductor, generally TiO, is desired. Moreover, this performance is enhanced when an efficient covering of TiO surface by the sensitizer is achieved. The Brust-Schiffrin-like methods are of the most employed approaches for nanoparticles synthesis. In a traditional approach, the reduction of the gold precursor is performed in the presence of a stabilizer (typically a thiol molecule) free in solution. A second step in which the obtained nanoparticles are anchored to the semiconductor surface is necessary in the case of photosensitive applications. Drawbacks like steric hindrance turn more difficult the covering of the semiconductor's surface by nanoparticles. In this paper, we report a variation of this methodology, where the linker is previously anchored to the TiO nanoparticles surface. The resulting system is employed as the stabilizer in the gold reduction step. This strategy is carried out in aqueous media in two simple steps. A great covering of the titania surface by gold nanoparticles is achieved in all cases and the gold nanoparticles in the resulting nanoaggregate might be useful for photoelectrovoltaic or photocatalytic applications.

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“…Most of the CNT–U surface was covered with PAT. Hence, the enhanced dispersion of CNT–U in DMSO arose from the beneficial effect of the outer coating of PAT [ 34 , 35 , 36 , 37 ] Please see Figure S5 .…”

Section: Resultsmentioning

confidence: 99%

Bio-Inspired Supramolecular Chemistry Provides Highly Concentrated Dispersions of Carbon Nanotubes in Polythiophene

et al. 2016

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In this paper we report the first observation, through X-ray diffraction, of noncovalent uracil–uracil (U–U) dimeric π-stacking interactions in carbon nanotube (CNT)–based supramolecular assemblies. The directionally oriented morphology determined using atomic force microscopy revealed highly organized behavior through π-stacking of U moieties in a U-functionalized CNT derivative (CNT–U). We developed a dispersion system to investigate the bio-inspired interactions between an adenine (A)-terminated poly(3-adeninehexyl thiophene) (PAT) and CNT–U. These hybrid CNT–U/PAT materials interacted through π-stacking and multiple hydrogen bonding between the U moieties of CNT–U and the A moieties of PAT. Most importantly, the U···A multiple hydrogen bonding interactions between CNT–U and PAT enhanced the dispersion of CNT–U in a high-polarity solvent (DMSO). The morphology of these hybrids, determined using transmission electron microscopy, featured grape-like PAT bundles wrapped around the CNT–U surface; this tight connection was responsible for the enhanced dispersion of CNT–U in DMSO.

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Electrochemical application of titanium dioxide nanoparticle/gold nanoparticle/multiwalled carbon nanotube nanocomposites for nonenzymatic detection of ascorbic acid

Cited by 19 publications

References 46 publications

Design of Electrochemically Modified fMWCNT‐pencil Graphite Electrode Decorated with Cu and Ag Nanofilm and its Electrocatalytic Behavior Towards Imazethapyr

Design of Electrochemically Modified fMWCNT‐pencil Graphite Electrode Decorated with Cu and Ag Nanofilm and its Electrocatalytic Behavior Towards Imazethapyr

Synthesis of Au Nanoparticles Assisted by Linker-Modified TiO₂ Nanoparticles

Bio-Inspired Supramolecular Chemistry Provides Highly Concentrated Dispersions of Carbon Nanotubes in Polythiophene

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Electrochemical application of titanium dioxide nanoparticle/gold nanoparticle/multiwalled carbon nanotube nanocomposites for nonenzymatic detection of ascorbic acid

Cited by 19 publications

References 46 publications

Design of Electrochemically Modified fMWCNT‐pencil Graphite Electrode Decorated with Cu and Ag Nanofilm and its Electrocatalytic Behavior Towards Imazethapyr

Design of Electrochemically Modified fMWCNT‐pencil Graphite Electrode Decorated with Cu and Ag Nanofilm and its Electrocatalytic Behavior Towards Imazethapyr

Synthesis of Au Nanoparticles Assisted by Linker-Modified TiO2 Nanoparticles

Bio-Inspired Supramolecular Chemistry Provides Highly Concentrated Dispersions of Carbon Nanotubes in Polythiophene

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Synthesis of Au Nanoparticles Assisted by Linker-Modified TiO₂ Nanoparticles