Effect of Cobalt Dopant on Structural and Optical Properties of Co-Precipitated TiO2 Nanopowders

Prasopporn Junlabhut; Chakkaphan Wattanawikkam; Weerachon Phoohinkong; Wanichaya Mekprasart; Wisanu Pecharapa

doi:10.4028/www.scientific.net/KEM.675-676.97

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HomeKey Engineering MaterialsKey Engineering Materials Vols. 675-676Effect of Cobalt Dopant on Structural and Optical...

Effect of Cobalt Dopant on Structural and Optical Properties of Co-Precipitated TiO₂ Nanopowders

Abstract:

The effects of cobalt (Co) addition on structural and optical properties of TiO₂ nanopowders have been investigated. A co-precipitation method was employed to synthesize TiO₂ nanoparticles with various Co additives from 0-10 mol% using tetrabutyl titanate and Cobalt (II) nitrate hexahydrate as starting precursors for Ti and Co source, respectively. The crystallinity of Co-doped TiO₂ nanopowders is heightened by calcination process. The crystal structure, phase formation and the corresponding functional groups of Co-doped TiO₂ were analyzed by X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The scanning electron microscope (SEM) was taken to observe their morphologies. The chemical compositions of Co additive into TiO₂ matrix are confirmed by EDAX. Their optical properties were investigated by diffuse reflectance spectroscopy. Diffuse reflectance spectra of samples exhibit the increasing absorption in visible region with an increasing Co content. The overall characterization results indicated that the crystallinity and optical properties of TiO₂ nanoparticles are significantly affected by Co dopant.

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Key Engineering Materials (Volumes 675-676)

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97-100

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.675-676.97

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Online since:

January 2016

Authors:

Prasopporn Junlabhut*, Chakkaphan Wattanawikkam, Weerachon Phoohinkong, Wanichaya Mekprasart, Wisanu Pecharapa

Keywords:

Cobalt Doping, Co-Doped TiO₂ Nanoparticles, Co-Precipitation Method

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