Synthesis and characterization of TiO2/graphene oxide nanocomposite

Sagadevan, Suresh; Pal, Kaushik; Koteeswari, P.; Subashini, A.

doi:10.1007/s10854-017-6488-3

Cited by 29 publications

(15 citation statements)

References 26 publications

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“…TEM analysis proved the formation of spherical shaped nanoparticle, which clustered all around and tend to form agglomerates during the formation stage, almost following that from SEM results. [33,34] XPS analysis was carried out to examine zero-valent copper in the system as depicted in Figure 6. The XPS results show the main peaks of Cu 0 (nZVCu) at a binding energy of 2p 3/2 (932.4 eV) and 2p 1/2 (952.3 eV) which confirm the successful formation of nZVCu, consistent to the previous studies.…”

Section: ¼ Kl Bcosqmentioning

confidence: 99%

Colorimetric Sensing of Hydrogen Peroxide Using Ionic‐Liquid‐Sensitized Zero‐Valent Copper Nanoparticle (nZVCu)

et al. 2020

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In this study, a stable ionic liquid (IL) mediated zero-valent copper nanoparticle (nZVCu), namely IL-nZVCu, has been evaluated for catalytic properties towards H 2 O 2 -mediated TMB (3, 3',5,5'-tetramethylbenzidine) reaction under normal conditions of temperature and pH. The various analytical techniques like Fourier Transform Infrared Spectroscopy (FT-IR), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), X-ray powder diffraction (XRD), scanning electron microscope (SEM), Transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS) were used to confirm the structure and nano size of nZVCu. The simple protic IL 1-hydrogen-3-methylimidazolium acetate (HmimOAc) with its cation 1-methylimidazole and anion acetate was synthesized, characterized, and coated on nZVCu to prepared IL-nZVCu. As a novel mimic peroxidase, IL-nZVCu could quickly catalyze the oxidation reaction of specific chromogenic substrate TMB, when H 2 O 2 acts as an oxidant, followed by a remarkable color change in the solution measured by UV/Vis Spectrophotometry. The enhanced catalytic activity and significant color change were greatly dependent on the catalyst dosage, the volume of IL taken, incubation time, H 2 O 2 concentration, and TMB concentration. Also, IL-nZVCu showed no response toward ascorbic acid, cholesterol, dopamine, urea and uric acid. Based on these findings, IL-nZVCu could be effectively used for visual colorimetric sensing of H 2 O 2 with a limit of detection (LOD) of 44 μM over the dynamic linear range from 40 μM to 1000 μM concentration.

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Section: ¼ Kl Bcosqmentioning

confidence: 99%

Colorimetric Sensing of Hydrogen Peroxide Using Ionic‐Liquid‐Sensitized Zero‐Valent Copper Nanoparticle (nZVCu)

et al. 2020

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“…Recently research interest has been rapidly growing for the fabrication of semiconductor metal oxide nanoparticles with tunable morphologies and distinct characterization. Based on their structure and synthesis strategy, the electrical, optical and catalytic properties can be altered significantly [ 37 – 42 ].…”

Section: Introductionmentioning

confidence: 99%

A facile hydrothermal approach for catalytic and optical behavior of tin oxide- graphene (SnO2/G) nanocomposite

et al. 2018

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A cost-effective, facile hydrothermal approach was made for the synthesis of SnO2/graphene (Gr) nano-composites. XRD diffraction spectra clearly confirmed the presence of tetragonal crystal system of SnO2 which was maintaining its structure in both pure and composite materials’ matrix. The stretching and bending vibrations of the functional groups were analyzed using FTIR analysis. FESEM images illustrated the surface morphology and the texture of the synthesized sample. HRTEM images confirmed the deposition of SnO2 nanoparticles over the surface of graphene nano-sheets. Raman Spectroscopic analysis was carried out to confirm the in-plane blending of SnO2 and graphene inside the composite matrix. The photocatalytic performance of the synthesized sample under UV irradiation using methylene blue dye was observed. Incorporation of grapheme into the SnO2 sample had increased the photocatalytic activity compared with the pure SnO2 sample. The electrochemical property of the synthesized sample was evaluated.

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“…Figure 11 illustrates the behaviour of ac conductivities with frequency changes for the CuO/rGO nanocomposites. The conductivity of the CuO/rGO NC may be split into two regions: (i) the low-frequency region, where the conductivity is mostly influenced by dc conductivity and (ii) the high-frequency region, which is mainly distinguished by frequency-dependent conductivity which confirms the ac conductivity due to MWS interfacial polarisation effects and dielectric relaxations [31]. Thus, due to MWS interfacial polarisation, the ac conductivities have increased with frequency for the CuO/rGO NC.…”

Section: Resultsmentioning

confidence: 97%

A one-step facile route synthesis of copper oxide/reduced graphene oxide nanocomposite for supercapacitor applications

Sagadevan

Chowdhury

Johan

et al. 2018

Journal of Experimental Nanoscience

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In this research, a one step, facile route has been undertaken to synthesise copper oxide/reduced graphene oxide (CuO/rGO) nanocomposites. X-ray powder diffraction analysis (XRD) was carried out to identity the crystalline structure and phase of the synthesised sample. Elemental analysis and surface morphological features were analysed using EDX and FESEM Images. Particle size as well as the shape of the as prepared composite was observed from HR-TEM images. Raman spectra illustrated the peak of the individual composite materials. The electrochemical properties of the prepared nanocomposite were investigated. The dielectric behaviour of the sample including dielectric constant, dielectric loss and AC conductivity was measured at various frequency levels. Temperature was varied accordingly to observe the effect of temperature on the dielectric properties of the sample.

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Synthesis and characterization of TiO2/graphene oxide nanocomposite

Cited by 29 publications

References 26 publications

Colorimetric Sensing of Hydrogen Peroxide Using Ionic‐Liquid‐Sensitized Zero‐Valent Copper Nanoparticle (nZVCu)

Colorimetric Sensing of Hydrogen Peroxide Using Ionic‐Liquid‐Sensitized Zero‐Valent Copper Nanoparticle (nZVCu)

A facile hydrothermal approach for catalytic and optical behavior of tin oxide- graphene (SnO2/G) nanocomposite

A one-step facile route synthesis of copper oxide/reduced graphene oxide nanocomposite for supercapacitor applications

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