Structural evolution and stability studies of heterostructures comprised of carbon nanotubes decorated with nickel/nickel oxide core/shell nanoparticles

Chopra, Nitin; Shi, Wenwu

doi:10.1016/j.carbon.2011.04.068

Cited by 23 publications

(24 citation statements)

References 54 publications

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“…S15D). This confirmed the presence of graphitic carbon shells around Au nanoparticles [25]. The deconvoluted peak located at $284.8 eV corresponds to C 1s peak and peaks located at $286 and $288 eV could be attributed to carbon-oxygen links [41,42].…”

Section: 2supporting

confidence: 63%

“…Multiwalled carbon nanotubes (MWCNTs or CNTs) were synthesized in a floating catalyst CVD process using ferrocene and xylene as catalyst and carbon source, respectively [23][24][25]. A liquid mixture of ferrocene and xylene (Fe:C = 0.75% mol) was injected through a syringe injector into a pre-heated zone ($220°C) and subsequently transported into the reaction zone ($675°C) in the center of a quartz tube furnace.…”

Section: Synthesis Of Carbon Nanotubes (Cnts) and Cnt-au Nanoparticlementioning

confidence: 99%

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Controlled assembly of graphene shells encapsulated gold nanoparticles and their integration with carbon nanotubes

Chopra

Summerville

2013

Carbon

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Section: 2supporting

confidence: 63%

Section: Synthesis Of Carbon Nanotubes (Cnts) and Cnt-au Nanoparticlementioning

confidence: 99%

Controlled assembly of graphene shells encapsulated gold nanoparticles and their integration with carbon nanotubes

Chopra

Summerville

2013

Carbon

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“…In this regards, a variety of nanostructured nickel-based materials with different morphologies, such as nanowires, nanorods, nanotubes, nanowhiskers, and nanoparticles, have been successfully synthesized. [7][8][9][10][11][12] In particular, the design and fabrication of nanoporous (including microporous, mesoporous and macroporous materials) nickel-based materials have attracted considerable attention in recent years. [13][14][15][16][17] Micro-and nanoemulsions as new micro-reactors have been widely used in the production of metallic nanoparticles, semiconductor, metal oxides and nanometer-scale magnetic particles.…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Nickel Microspheres: Synthesis and Application for the Electrocatalytic Oxidation and Determination of Acyclovir

2012

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Experimental Reagents and chemicalsAll other chemicals used in this work (otherwise those stated) were of analytical grade from Merck, and were used without further purification. Carbon micro-particles (graphite fine powder) with a particle size of less than 50 μm were obtained from Merck. Nafion solution was purchased from Sigma. All of the solutions were prepared by redistilled water. Acyclovir 2012 © The Japan Society for Analytical Chemistry † To whom correspondence should be addressed. Nickel microspheres were synthesized via a water-in-oil reverse nanoemulsion system using nickel nitrate as the nickel precursor and hydrazine hydrate as the reducing agent. The nanoemulsion was a triton X-100/cyclohexane/water ternary system. The surface morphology of the nickel microspheres was studied by scanning electron microscopy, which indicated that the microspheres had a nanoporous structure. The electrochemical behavior of the nanoporous nickel microspheres were studied in alkaline solution and were then employed to fabricate a modified carbon paste electrode in order to investigate the electrocatalytic oxidation of the drug acyclovir. The oxidation process involved, and its kinetics were investigated using cyclic voltammetry and chronoamperometry. The rate constant of the catalytic oxidation of acyclovir and the electron-transfer coefficient are reported. A sensitive, simple and time-saving amperometric procedure was developed for the analysis of acyclovir. The proposed amperometric method was also applied to determine acyclovir in tablets and topical cream.

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“…Similarly, CuO/Co3O4 showed better photocatalytic behavior than simple metal oxide (CuO) nanostructures [3,5,17,[25][26][27][28]. For better chemical sensing and catalysis, CNT coated Ni/NiO coreshell heterostructures were also studied in the literature [26]. Ag-AgBr coated Al2O3 heterostructure was reported for photo-degradation of industrial contaminants [29].…”

Section: Introductionmentioning

confidence: 99%

“…Some literature drew attention towards metal oxide heterostructures, for example, ZnO coated with Ag, WO3, Zinc Tin Oxide (ZTO) and CdS for better photocatalytic and gas sensor application. Similarly, CuO/Co3O4 showed better photocatalytic behavior than simple metal oxide (CuO) nanostructures [3,5,17,[25][26][27][28]. For better chemical sensing and catalysis, CNT coated Ni/NiO coreshell heterostructures were also studied in the literature [26].…”

Section: Introductionmentioning

confidence: 99%

Morphological, Structural and Optical Characterization of Bottom-Up Growth of Ag-WO<sub>3</sub> Core-Shell Nano-Cube Heterostructures

Imam

Chopra

2017

Preprint

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Abstract:A new class of nano-cube core-shell heterostructures containing Ag coating on the top of WO3 was fabricated. Physical vapor deposition was used to produce WO3 based nanoheterostructures. All kind of wet toxic chemical process was avoided to make the process simple and contaminant free. Sputtering of WO3 and a subsequent thermal annealing process was done to create nano-cubes of WO3. After that, sputtering of Ag was performed to form the Ag-WO3 coreshell nano-heterostructures (CSNH). The CSNHs were characterized using field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), X-ray diffraction analysis (XRD) and UV-vis spectroscopy. The morphologies, elemental analysis, interfaces, crystallinity, phases, and chemical compositions were analyzed. The bottom-up growth of WO3 nanocubes was studied using different time periods at 900°C. Ag coating was also studied before and after annealing. Finally, an optical property (band gap) was also analyzed using Tauc plot derive from absorption spectra. The tailoring the band gap of WO3 from ~2.9eV to ~ 2.45 eV was observed while Ag-WO3 CSNH formed.

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Structural evolution and stability studies of heterostructures comprised of carbon nanotubes decorated with nickel/nickel oxide core/shell nanoparticles

Cited by 23 publications

References 54 publications

Controlled assembly of graphene shells encapsulated gold nanoparticles and their integration with carbon nanotubes

Controlled assembly of graphene shells encapsulated gold nanoparticles and their integration with carbon nanotubes

Nanoporous Nickel Microspheres: Synthesis and Application for the Electrocatalytic Oxidation and Determination of Acyclovir

Morphological, Structural and Optical Characterization of Bottom-Up Growth of Ag-WO<sub>3</sub> Core-Shell Nano-Cube Heterostructures

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