Rapid synthesis, characterization and optical properties of TiO{sub 2} coated ZnO nanocomposite particles by a novel microwave irradiation method

Journal Article · Fri Oct 15 04:00:00 EDT 2010 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2010.06.048· OSTI ID:22204694

Bahadur, Newaz Mohammed ^[1]; Furusawa, Takeshi; Sato, Masahide ^[1]; Kurayama, Fumio ^[2]; Suzuki, Noboru ^[1]

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1. Department of Innovation Systems Engineering, Graduate School of Engineering, Utsunomiya University, Yoto 7-1-2, Utsunomiya 321-8585 (Japan)
2. Center for Optical Research and Education, Utsunomiya University (Japan)

A novel and rapid microwave method was used to prepare TiO{sub 2} coated ZnO nanocomposite particles. The resulted particles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), high resolution transmission electron microscopy (HR-TEM) and X-ray photoelectron spectroscopy (XPS). Results show that ZnO nanoparticles were coated with 6-10 nm amorphous TiO{sub 2} layers. In addition, zeta potential analysis demonstrated the presence of TiO{sub 2} layer on the surface of ZnO nanoparticles. Photoluminescence (PL) spectroscopy and UV-visible spectroscopy were used to investigate the optical properties of the nanoparticles. Compared to uncoated ZnO nanoparticles, the TiO{sub 2} coated ZnO nanoparticles showed enhanced UV emission. The UV-visible diffuse reflectance study revealed the significant UV shielding characteristics of the nanocomposite particles. Moreover, amorphous TiO{sub 2} coating effectively reduced the photocatalytic activity of ZnO nanoparticles as evidenced by the photodegradation of Orange G with uncoated and TiO{sub 2} coated ZnO nanoparticles under UV radiation.

• OSTI ID: 22204694
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 10 Vol. 45; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
FOURIER TRANSFORM SPECTROMETERS
FOURIER TRANSFORMATION
INFRARED SPECTRA
IRRADIATION
LAYERS
NANOSTRUCTURES
OPTICAL PROPERTIES
PARTICLES
PHOTOCATALYSIS
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
SOL-GEL PROCESS
SYNTHESIS
TITANIUM OXIDES
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY
ZINC OXIDES