Preparation of Improved p-n Junction NiO/TiO<sub>2</sub>Nanotubes for Solar-Energy-Driven Light Photocatalysis

International Journal of Photoenergy - Tập 2013 - Trang 1-10 - 2013
Lan Ching Sim1, Kai Wern Ng1, Shaliza Ibrahim1, Pichiah Saravanan1,2
1Environmental Engineering Laboratory, Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
2Nanotechnology and Catalysis Research Centre (NANOCEN), University of Malaya, 50603 Kuala Lumpur, Malaysia

Tóm tắt

Self-organized TiO2nanotubes (TNTs) with average inner diameter of 109 nm, wall thickness of 15 nm, and tube length of 7–10 μm were loaded with nickel oxide (NiO) nanoparticles via incipient wet impregnation method. The molar concentration of Ni(NO3)2·6H2O aqueous solution varied in a range of 0.5 M–2.5 M. The samples were characterized for crystalline phase, morphology, topography, chemical composition, Raman shift, and UV-Vis diffusion reflection properties. The finding shows that the loading of NiO did not influence the morphology, structure, and crystalline phase of TNTs but it exhibited significant effect on crystallite size and optical absorption properties. Further, the solar-energy-driven the photocatalytic activity of NiO/TNTs and pure TNTs was evaluated by degrading methylene blue (MB). The results confirm that photocatalytic efficiency of NiO/TNTs is higher than that of TNTs.

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Thông tin xuất bản

International Journal of Photoenergy

Tập 2013

1-10

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