Synthesis of reduced graphene oxide sheets decorated by zinc oxide nanoparticles: Crystallographic, optical, morphological and photocatalytic study

Labhane, Prakash K.; Patle, L. B.; Huse, V. R.; Sonawane, Gunvant H.; Sonawane, Shirish H.

doi:10.1016/j.cplett.2016.08.041

Cited by 55 publications

(7 citation statements)

References 35 publications

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“…It is clear from the table that the structural lattice parameters increases and the crystallite size decreases with the increasing weight percentage of rGO in the ZnO-rGO nanocomposites upto 5%. The obtained results are consistent with the literature [36][37][38].…”

Section: Structural Analysis (X-ray Diffraction)supporting

confidence: 93%

Investigation of charge transport mechanism in hydrothermally synthesized reduced graphene oxide (rGO) incorporated zinc oxide (ZnO) nanocomposite films

Jain

Sharma

Puri

2021

J Mater Sci: Mater Electron

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The present study aims to investigate the impact of reduced graphene oxide (rGO) incorporation on the charge transport properties of zinc oxide (ZnO) nanocomposite films. ZnO and varied weight percentage of rGO (1.25% to 10%) in ZnO-rGO nanocomposites are synthesized via cost-effective and facile hydrothermal method. The effect of varying weight percentage of rGO in ZnO nanocomposite is analysed by techniques such as X-ray diffraction (XRD), Scanning electron microscopy (SEM), Energy dispersive X-ray (EDX), Fourier transform infra-red spectroscopy (FTIR), and Raman spectroscopy. The observed current-voltage (I-V) characteristics at room temperature show the enhancement in forward current with an increasing weight percentage of rGO (1.25% to 10%) in ZnO nanocomposite films. To study the charge transport mechanism in nanocomposite films, dual-logarithmic I-V characteristics are plotted. From the characteristic curves, we find that three different laws of space charge limited conduction (SCLC) model namely Ohm's law, Child's law, and trap-limited SCLC mechanism describe charge transport properties in the ZnO-rGO nanocomposite films. At a low weight percentage of rGO (1.25%) in ZnO-rGO nanocomposite films, a transition from Child's law to trap-limited SCLC mechanism (0.9 V being the cross-over voltage) is obtained. As the weight percentage of rGO in ZnO-rGO nanocomposite films is increased from 2.5 to 10%, the conduction is favored by Ohm's law at low applied voltages to Child's law at higher applied voltages. Best experimental results are shown with 5% of rGO in ZnO-rGO nanocomposite. The prepared nanocomposite films have potential applications in UV-photodetector devices.

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Section: Structural Analysis (X-ray Diffraction)supporting

confidence: 93%

Investigation of charge transport mechanism in hydrothermally synthesized reduced graphene oxide (rGO) incorporated zinc oxide (ZnO) nanocomposite films

Jain

Sharma

Puri

2021

J Mater Sci: Mater Electron

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“…prepared with NMP, the absorption edge shifts to shorter wavelength around 400 nm. This is in agreement with other reports on the absorption edge of GO-ZnO composites [8,16]. Tauc's plots (plot between (αhv) 2 vs hv where α is the absorption coefficient) were used to determine the band gap of the material from the absorbance data.…”

Section: Characterization Methodssupporting

confidence: 88%

“…Zinc Oxide (ZnO), a wide band gap II-VI semiconductor has been a subject of extensive research owing to its numerous interesting properties, making it a desirable material for application in conductive oxide [1], solar cell [2], display and sensors [3,4], and photocatalysis [5,6]. However, pure ZnO suffers from weak photo response [7], fast recombination of electron-hole pairs [8] and low operating speed.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the effect of solvents on the optical, structural and morphological properties of ZnO-GO nanocomposites synthesized by sol-gel method

Sudha¹,

Pillai²

2019

Nanosystems: Phys. Chem. Math.

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Zinc Oxide-Graphene Oxide (ZnO-GO) nanocomposites were prepared using solvents polyvinylpyrrolidone (PVP) and N-Methyl-2 Pyrrolidone (NMP) by sol-gel technique and their optical, structural and morphological properties were investigated. X-ray Diffraction (XRD) studies show the presence of planes of GO and ZnO confirming the formation of composites. The particle sizes were calculated using Scherrer's formula and were found to be in the nanometer range. Scanning Electron Microscopy (SEM) images show the formation of layered structures dispersed non-uniformly over clusters of particles. Energy Dispersive X-Ray (EDX) spectra confirm the presence of carbon, zinc and oxygen in the composites. The optical absorbance of ZnO-GO synthesized using PVP was higher than ZnO-GO with NMP with the absorption edge shifting to shorter wavelength in the presence of NMP. The band gap values were found to be in the range of 2.7-3.0 eV. The band gap of ZnO-GO synthesized using NMP was higher than ZnO-GO synthesized using PVP.

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“…The resultant suspension was separated using centrifugation and thoroughly washed with deionised water and ethanol to remove impurities and dried overnight at 80 °C to yield ZnO/Co 3 O 4 /rGO ternary nanocomposite. 31,32 The growth mechanism of ZnO and Co 3 O 4 nanostructures on graphene is due to the attraction of positively-charged metal/metal-oxide ions by the polarized bonds of the functional groups on the graphene (such as -OH, CO of carboxylic, OC-O of carboxylate, C-O and O-C-O). 33…”

Section: Synthesis Of Zno/co 3 O 4 /Rgo Nanocompositementioning

confidence: 99%

A sensitive non-enzymatic electrochemical glucose sensor based on a ZnO/Co₃O₄/reduced graphene oxide nanocomposite

Hussein¹,

Tsegaye

Shifera

et al. 2023

Sens. Diagn.

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Synthesis of reduced graphene oxide sheets decorated by zinc oxide nanoparticles: Crystallographic, optical, morphological and photocatalytic study

Cited by 55 publications

References 35 publications

Investigation of charge transport mechanism in hydrothermally synthesized reduced graphene oxide (rGO) incorporated zinc oxide (ZnO) nanocomposite films

Investigation of charge transport mechanism in hydrothermally synthesized reduced graphene oxide (rGO) incorporated zinc oxide (ZnO) nanocomposite films

A comparative study of the effect of solvents on the optical, structural and morphological properties of ZnO-GO nanocomposites synthesized by sol-gel method

A sensitive non-enzymatic electrochemical glucose sensor based on a ZnO/Co₃O₄/reduced graphene oxide nanocomposite

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Synthesis of reduced graphene oxide sheets decorated by zinc oxide nanoparticles: Crystallographic, optical, morphological and photocatalytic study

Cited by 55 publications

References 35 publications

Investigation of charge transport mechanism in hydrothermally synthesized reduced graphene oxide (rGO) incorporated zinc oxide (ZnO) nanocomposite films

Investigation of charge transport mechanism in hydrothermally synthesized reduced graphene oxide (rGO) incorporated zinc oxide (ZnO) nanocomposite films

A comparative study of the effect of solvents on the optical, structural and morphological properties of ZnO-GO nanocomposites synthesized by sol-gel method

A sensitive non-enzymatic electrochemical glucose sensor based on a ZnO/Co3O4/reduced graphene oxide nanocomposite

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Product

Resources

About

A sensitive non-enzymatic electrochemical glucose sensor based on a ZnO/Co₃O₄/reduced graphene oxide nanocomposite