Remarkable improvement of visible light photocatalytic activity of TiO{sub 2} nanotubes doped sequentially with noble metals for removing of organic and microbial pollutants
- Department of Ceramic, Materials and Energy Research Center, P.O. Box 14155-4777, Karaj (Iran, Islamic Republic of)
- Department of Semiconductors, Materials and Energy Research Center, P.O. Box 31787-316, Karaj (Iran, Islamic Republic of)
- Department of Advanced Materials & Renewable Energy, Iranian Research Organization for Science & Technology, Tehran (Iran, Islamic Republic of)
Highlights: • Ordered TiO{sub 2} nanotubes (NTs) were synthesized using anodic oxidation. • TiO{sub 2} NTs were modified with Ag and Au NPs that settled separately to widen visible absorption. • TiO{sub 2} NTs modified with Ag and Au NPs is superior visible light photocatalyst. • TiO{sub 2} NTs modified with Ag and Au NPs shows superior antibacterial activity. • Annealing temperature played important role in photocatalytic activity of TiO{sub 2} NTs. - Abstract: The aim of this study was to show that Ag and Au nanoparticles (NPs) can have a synergistic effect on the photocatalytic and antibacterial activity of TiO{sub 2} nanotubes (NTs) under visible irradiation. TiO{sub 2} NTs were grown on Ti substrate by anodic oxidation and modified with Ag and Au NPs by dip coating and sputtering methods, respectively. The spherical 5–20 nm Ag and Au NPs were deposited on TiO{sub 2} NTs with diameter of 50–80 nm. In contrast to obtained results under UV irradiation, visible-light absorption range and visible photocatalytic activity of Ag and Au co-modified TiO{sub 2} NTs were much higher than TiO{sub 2} NTs without modification and TiO{sub 2} NTs modified with monometallic NPs. Photocatalytic activity of modified TiO{sub 2} NTs increased with increasing annealing temperature and appearing rutile phase. Antibacterial activity of Ag and Au-comodified TiO{sub 2} NTs against E. coli was noticeably more than that of TiO{sub 2} NTs modified with monometallic NPs.
- OSTI ID:
- 22730401
- Journal Information:
- Materials Research Bulletin, Vol. 94; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
Similar Records
Fabrication and photocatalytic activity of high-efficiency visible-light-responsive photocatalyst ZnTe/TiO{sub 2} nanotube arrays
Uniformly dispersed CdS nanoparticles sensitized TiO{sub 2} nanotube arrays with enhanced visible-light photocatalytic activity and stability