Ag@AgX(X = Cl, Br, I) modified N, F codoped TiO2 nanotubes as effective photocatalyst. (May 2014)

• Record Type: Journal Article
• Authors: Zhao, Z.; Zhu, L.; Fan, J.
• Is Part Of: Materials technology. Volume 29(2014)Supplement A1
• Page Start: A3
• Page End: A8
• Publication Date: 2014-05
• Subjects: Silver halide, -- Surface plasmon resonance, -- N, F codoped TiO2, -- Nanotubes, -- Photocatalysis; Materials -- Periodicals; Materials science -- Periodicals; Materials -- Technological innovations -- Periodicals; 620.1105
• DOI: 10.1179/1753555714Y.0000000148
• Languages: English
• ISSNs: 1066-7857

Abstract

Abstract : Ag@AgX/N, F-TNTs were synthesised by two successive steps of hydrothermal and deposition–precipitation process. First, the N, F co-doped TiO2 nanotubes (N, F-TNTs) were prepared by hydrothermal synthetic process, followed by a deposition–precipitation method combined with photoreduction method to prepare Ag@AgX modified N, F-TiO2 nanotubes. This research mainly investigated the influence of different kinds of silver halides on the photocatalytic performance and aimed to reveal the preliminary mechanism. The influence of AgX compositing on the microstructures, optical properties and phase composition of samples was investigated by employing the TEM, Brunauer–Emmett–Teller, X-ray photoelectron spectroscopy, X-ray diffraction and ultraviolet (UV)–visible diffuse reflection spectra measurements. It was revealed that AgX composited catalysts not only showed extended photoresponse from UV to visible light region but also produced the surface plasmon resonance to increase the photoreducing efficiency. The results showed that different silver–silver halide plasma modified N, F-TNTs have obvious different photocatalytic activities. As far as methyl orange degradation is concerned, the photocatalytic performance of Ag@AgI/N, F-TNTs was clearly superior to that of Ag@AgCl/N, F-TNTs or Ag@AgBr/N, F-TNTs.