PHOTOCATALYTIC ACTIVITY UNDER VISIBLE LIGHT REGION OF Ca-MODIFIED TiO2NP FILMS PREPARED BY SPARKING OFF Ca-ELECTROPLATED Ti TIPS

Author:

JUMRUS NIDCHAMON12,PANTHAWAN ARISARA12,KUMPIKA TEWASIN3,SROILA WATTIKON12,KANTARAK EKKAPONG2,SANMUANGMOON PANUPONG4,SINGJAI PISITH32,THONGSUWAN WIRADEJ32

Affiliation:

1. The Graduate School in Chiang Mai University (GSCMU), Chiang Mai University, Chiang Mai 50200, Thailand

2. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

3. Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

4. Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand

Abstract

In this work, calcium (Ca)-modified titanium dioxide (TiO2) nanoparticulate (NP) films were successfully prepared using sparking off Ca-electroplated Ti tips. Aqueous solution of calcium carbonate (CaCO3) was used as electrolyte in the electroplating process. The experiment was carried out using electric current of 0.02[Formula: see text]mA applied to titanium electrodes for 10[Formula: see text]min. The NP films with small and uniform size were deposited on quartz substrate using the sparking process with a high DC voltage of 4[Formula: see text]kV in ambient air. The as-deposited NP films were then annealed at 800C, 900C and 1000C for 3[Formula: see text]h under atmospheric pressure to improve their crystallinity. Morphology, structural and optical properties of the NP films were characterized by SEM, XRD, Raman, XPS and UV-Vis spectroscopy. The effects of annealing temperature on the properties of the as-deposited and annealed NP films were reported. Furthermore, photocatalytic activity against 10 [Formula: see text]M of methylene blue (MB) under visible light region will be discussed.

Publisher

World Scientific Pub Co Pte Lt

Subject

Materials Chemistry,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics

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