Local Surface Plasmonic Resonance, Surface-Enhanced Raman Scattering, Photoluminescence, and Photocatalytic Activity of Hydrothermal Titanate Nanotubes Coated with Ag Nanoparticles | Zendy

Phạm Thị Thúy | Zendy; Vo Cao Minh | Zendy; Vo Quang | Zendy; Nguyễn Trí Tuấn | Zendy; Phạm Văn Tuấn | Zendy; Hoang Ba Cuong | Zendy; Nguyen Xuan Sang | Zendy

Open Access

Local Surface Plasmonic Resonance, Surface-Enhanced Raman Scattering, Photoluminescence, and Photocatalytic Activity of Hydrothermal Titanate Nanotubes Coated with Ag Nanoparticles

Author(s) -

Phạm Thị Thúy,

Vo Cao Minh,

Vo Quang,

Nguyễn Trí Tuấn,

Phạm Văn Tuấn,

Hoang Ba Cuong,

Nguyen Xuan Sang

Publication year - 2021

Publication title -

journal of nanomaterials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.463

H-Index - 66

eISSN - 1687-4129

pISSN - 1687-4110

DOI - 10.1155/2021/3806691

Subject(s) - raman spectroscopy , materials science , photoluminescence , photocatalysis , surface plasmon resonance , raman scattering , nanoparticle , resonance raman spectroscopy , nanocomposite , spectroscopy , photodegradation , chemical engineering , nanotechnology , optoelectronics , chemistry , optics , catalysis , organic chemistry , physics , engineering , quantum mechanics

In this work, we successfully fabricated homogeneous hydrothermal titanate nanotubes (TNTs) coated with Ag nanoparticles (NPs) and elucidated the role of Ag NPs on local surface plasmonic resonance, surface-enhanced Raman scattering, and the enhanced photocatalytic activity of TNT/Ag nanocomposite. The results showed that the photodegradation process reached equilibrium in just ~5 min for the TNT/Ag nanocomposite, which was much shorter than that of the TNT sample (~90 min). TEM micrographs showed that Ag NPs were well dispersed on the walls of the nanotubes. XRD patterns and Raman spectra indicated that the TNTs were in the monoclinic structure of H2Ti3O7. Furthermore, Raman active modes of the TNTs were significantly enhanced in the TNT/Ag sample, which was attributed to surface-enhanced Raman spectroscopy. The enhanced photocatalytic activity of the TNT/Ag sample was explained by UV-vis diffuse reflectance spectroscopy and photoluminescence emission spectroscopy, which showed local surface plasmonic resonance-induced visible light absorption enhancement and effective charge separation, respectively.

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