Optical, electrical and microstructural studies of monoclinic CuO nanostructures synthesized by a sol–gel route

Abstract

We have reported on the synthesis of CuO nanostructures via a simple sol-gel approach with high yield at low cost by the reduction of aqueous solutions of Cu(NO 3 ) 2 and Na 2 NO 3 . Synthesized nanostructures were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), fluorescence spectroscopy, Raman scattering and UV-Vis-NIR spectroscopy.Structural studies revealed that the prepared CuO nanostructures were polycrystalline in nature with monoclinic structure. The crystallite size of CuO nanostructures was estimated to be B10 nm using Debye-Scherrer's formula. The uniform and nanoregime grains were observed in SEM micrographs. The optical band gap value was estimated to be 1.2 eV using Tauc's plot. The Raman scattering investigations revealed A g and B g mode peaks at 278 cm À1 , 332 cm À1 and 618 cm À1 , respectively. Hwarangno 14-gil 5, Seongbu-gu,

Investigation of sol-gel processed CuO/SiO2 nanocomposite as a potential photoanode material

“…5, respectively. From the SEM image of the CuO nanoparticles it is seen that the particles occur in a form of elongated nanorod-type structure [29] and the particle sizes of the observed nanoparticles are in the range of 10 to 30 nm. The obtained nanoparticle sizes are in close proximity with the crystallite size calculated using XRD data.…”

Effect of citric acid on formation of oxides of Cu and Zn in modified sol-gel process: A comparative study

“…For example, Dhanasekaran et al, prepared nanostructured CuO using copper nitrate and sodium carbonate as precursors by sol-gel route. 20 They have used 0.4 M sodium carbonate and 0.2-0.6 M copper nitrate. Lin et al, investigated variation of band gap of size-controlled ZnO quantum dots by sol-gel process.…”

Facile Methodology of Sol-Gel Synthesis for Metal Oxide Nanostructures

“…This may be due to the increase of copper content in the nanostructures. The prepared thin films exhibited good optical properties [32]. Bibi Figure 7(b,c) [34].…”

“…The copper oxide nanostructures were synthesized using 0.2 and 0.6 M copper nitrate concentrations by a sol-gel method [32]. The X-ray diffraction pattern revealed that the prepared structures are polycrystalline in nature.…”