access icon free ZnO nanostructures: comparative synthetic and characterisation studies

Tuneful behaviours of nano sized materials have been considered as challenge among researchers to explore the possibility of engaging in diverse applications. In particular, the zinc oxide (ZnO) nanostructured materials offer effective metallic behaviours to enhance the applications in the fuel oxidation, pigments, nonlinear optics and solar energy conversion. In the presented research, ZnO nanoparticles are successfully synthesised by (sol–gel and sol–gel and precipitation) techniques, respectively. The physicochemical behaviours of ZnO nanocrystals were inspected by x-ray diffraction, Fourier transform infrared, field-emission scanning electron microscopy, thermo-gravimetric analysis, N2 physisorption and NH3 temperature-programmed desorption techniques. The results revealed that Sol–gel method at lower pH produced smaller particle sizes with larger surface area and well-established morphology in shorter time at lower temperature conditions, in comparison to precipitation method with higher pH, time and temperature conditions, showed bigger particles with smaller surface area, respectively.

Inspec keywords: X-ray diffraction; sol-gel processing; nanoparticles; II-VI semiconductors; particle size; desorption; zinc compounds; field emission scanning electron microscopy; thermal analysis; wide band gap semiconductors; nanofabrication; adsorption; precipitation (physical chemistry); Fourier transform infrared spectra

Other keywords: N2 physisorption; physicochemical behaviours; NH3 temperature-programmed desorption; ZnO; precipitation method; fuel oxidation; X-ray diffraction; field-emission scanning electron microscopy; thermo-gravimetric analysis; sol-gel method; Fourier transform infrared; solar energy conversion; nanocrystalline materials

Subjects: Other methods of nanofabrication; Optical properties of II-VI and III-V semiconductors (thin films, low-dimensional and nanoscale structures); Sorption and accommodation coefficients (surface chemistry); Structure of solid clusters, nanoparticles, nanotubes and nanostructured materials; II-VI and III-V semiconductors; Infrared and Raman spectra and scattering (condensed matter); Nanometre-scale semiconductor fabrication technology; Infrared and Raman spectra in inorganic crystals; Adsorption and desorption kinetics; evaporation and condensation

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