Plasmonic silver nanoparticles loaded titania nanotube arrays exhibiting enhanced photoelectrochemical and photocatalytic activities
| Autor: | S.T. Nishanthi, Esakkiappan Subramanian, D. Pathinettam Padiyan, B. Sundarakannan, S. Iyyapushpam |
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| Rok vydání: | 2015 |
| Předmět: |
Nanotube
Photoluminescence Materials science Renewable Energy Sustainability and the Environment Energy Engineering and Power Technology Nanotechnology Photochemistry Silver nanoparticle chemistry.chemical_compound chemistry Methyl orange Photocatalysis Charge carrier Electrical and Electronic Engineering Physical and Theoretical Chemistry Surface plasmon resonance Plasmon |
| Zdroj: | Journal of Power Sources. 274:885-893 |
| ISSN: | 0378-7753 |
| Popis: | A combination of electrochemical anodization and photochemical reduction is employed to fabricate highly ordered silver loaded titania nanotubes (Ag/TNT) arrays. The Ag/TNT samples show an extended optical absorbance from UV to visible region owing to the surface plasmon resonance effect of Ag. The photoluminescence intensity of Ag/TNT is significantly lower than that of pure titania revealing a decrease in charge carrier recombination. The photoelectrochemical properties of the prepared samples are studied using linear sweep and transient photocurrent measurements. Compared with pure TNT, the Ag loaded samples show a higher photoelectrochemical activity. The results demonstrate an efficient separation of photogenerated electron-hole pairs and the consequent increase in lifetime of charge carriers by Ag/TNT. The photocatalytic results of methyl orange dye degradation show that the Ag/TNT-3-05 sample exhibits the maximum degradation efficiency of 98.85% with kinetic rate constant of 0.0236(5) min−1 for 180 min light illumination. |
| Databáze: | OpenAIRE |
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