Effects of Calcination Holding Time on Properties of Wide Band Gap Willemite Semiconductor Nanoparticles by the Polymer Thermal Treatment Method

Autor: Ali Mustapha Alibe, Umer Rashid, Mohd Hafiz Mohd Zaid, Hj Abdul Aziz Sidek, Mohammad Zulhasif Ahmad Khiri, Khamirul Amin Matori, Ibrahim Mustapha Alibe, Yazid Yaakob
Rok vydání: 2018
Předmět:
optical properties
Luminescence
Materials science
Band gap
Willemite
Pharmaceutical Science
Nanoparticle
02 engineering and technology
Thermal treatment
engineering.material
Spectrum Analysis
Raman
polyvinylpyrrolidone
010402 general chemistry
calcination
01 natural sciences
Article
Analytical Chemistry
law.invention
lcsh:QD241-441
band gap
lcsh:Organic chemistry
law
willemite
nanoparticles
Quantum Dots
Spectroscopy
Fourier Transform Infrared
Drug Discovery
Calcination
Particle Size
Physical and Theoretical Chemistry
Crystallization
Silicates
Organic Chemistry
Wide-bandgap semiconductor
Povidone
021001 nanoscience & nanotechnology
0104 chemical sciences
Chemical engineering
Zinc Compounds
Chemistry (miscellaneous)
Thermogravimetry
engineering
Molecular Medicine
Crystallite
0210 nano-technology
Zdroj: Molecules, Vol 23, Iss 4, p 873 (2018)
Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry
Molecules; Volume 23; Issue 4; Pages: 873
ISSN: 1420-3049
DOI: 10.3390/molecules23040873
Popis: Willemite is a wide band gap semiconductor used in modern day technology for optoelectronics application. In this study, a new simple technique with less energy consumption is proposed. Willemite nanoparticles (NPs) were produced via a water–based solution consisting of a metallic precursor, polyvinylpyrrolidone (PVP), and underwent a calcination process at 900 °C for several holding times between 1–4 h. The FT–IR and Raman spectra indicated the presence of metal oxide bands as well as the effective removal of PVP. The degree of the crystallization and formation of the NPs were determined by XRD. The mean crystallite size of the NPs was between 18.23–27.40 nm. The morphology, particle shape and size distribution were viewed with HR-TEM and FESEM analysis. The willemite NPs aggregate from the smaller to larger particles with an increase in calcination holding time from 1–4 h with the sizes ranging between 19.74–29.71 nm. The energy values obtained from the experimental band gap decreased with increasing the holding time over the range of 5.39 eV at 1 h to at 5.27 at 4 h. These values match well with band gap obtained from the Mott and Davis model for direct transition. The findings in this study are very promising and can justify the use of these novel materials as a potential candidate for green luminescent optoelectronic applications.
Databáze: OpenAIRE
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