Preparation of Improved p-n Junction NiO/TiO2Nanotubes for Solar-Energy-Driven Light Photocatalysis

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...

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Bibliographic Details
Published in:International journal of photoenergy 2013-01, Vol.2013
Main Authors: Sim, Lan Ching, Ng, Kai Wern, Ibrahim, Shaliza, Pichiah Saravanan
Format: Article
Language:English
Subjects:
Aqueous solutions
Carbon
Civil engineering
Environmental engineering
Light
Nanoparticles
Photocatalysis
Semiconductors
Solar energy
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Summary: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.
ISSN:1110-662X
1687-529X
DOI:10.1155/2013/659013