Effect of zinc acetate dihydrate precursor concentration on the properties of TiO sub(2)-ZnO core-shell nanograss hetero-structure

TiO sub(2)-ZnO core shell nanograss (NG) hetero-structure was synthesized via two-step synthesis techniques, namely, liquid phase deposition (LPD) to prepare the TiO sub(2) core nanograss and dip-coating technique to prepare the ZnO shell onto the core. The effect of the concentration of zinc acetat...

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Bibliographic Details
Published in:Journal of alloys and compounds 2015-02, Vol.623, p.460-465
Main Authors: Samsuri, S AM, Rahman, M YA, Umar, A A, Salleh, M M
Format: Article
Language:English
Subjects:
Alloys
Crystallites
Dip coatings
Nanostructure
Precursors
Shells
Titanium dioxide
Zinc acetate
Zinc oxide
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Summary:TiO sub(2)-ZnO core shell nanograss (NG) hetero-structure was synthesized via two-step synthesis techniques, namely, liquid phase deposition (LPD) to prepare the TiO sub(2) core nanograss and dip-coating technique to prepare the ZnO shell onto the core. The effect of the concentration of zinc acetate dehydrate (ZAD) precursor on the properties of TiO sub(2)-ZnO core shell has been investigated. The FESEM characterization reveals that the TiO sub(2) NG has high density of nanobranch with sharp multiple arms. The morphological observation shows that 0.15 M is the optimum ZAD concentration in forming the TiO sub(2)-ZnO core-shell NG. It was found that the morphology changes from nanograss to nanoparticle as the concentration of ZAD is further increased to 0.20 M. The structural characterization by XRD confirms that the formation of anatase TiO sub(2) and wurzite ZnO phases in the core-shell structure. The crystallite size of the TiO sub(2) core decreases with the concentration of ZAD. The optical absorption of the sample increases with the concentration of ZAD in the wavelength range of 350-380 nm.
ISSN:0925-8388
DOI:10.1016/j.jallcom.2014.10.192