Enhanced Performance of Surface Modified Tio(2) Nanotubes for the Decomposition of Perfluorooctanoic Acid | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

3981780

Reference Type

Journal Article

Title

Enhanced Performance of Surface Modified Tio(2) Nanotubes for the Decomposition of Perfluorooctanoic Acid

Author(s)

Tian, A; Wu, Y; Mao, Kai

Year

2017

Is Peer Reviewed?

Yes

Journal

AIP Conference Proceedings
ISSN: 0094-243X
EISSN: 1551-7616

Book Title

AIP Conference Proceedings

Volume

1794

DOI

10.1063/1.4971911

Web of Science Id

WOS:000404283400029

Abstract

Photocatalytic decomposition of an emerging pollutant perfluorooctanoic acid (PFOA) in aqueous solution by Ag nanoparticles and molecularly imprinted polymers modified TiO2 nanotubes were investigated. The modified TiO2 were characterized by field-emission scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy. PFOA decomposition by the MIP-Ag/TiO2 NTs reached 91% after 8 h reaction. Compared with other prepared photo catalyst, MIP-Ag/TiO2 NTs exhibited higher activities for PFOA decomposition. The rate constant of pseudo-first-order kinetics for MIP-Ag/TiO2 NTs was 0.0055min(-1), which were much higher than that of other TiO2 materials. The great performance of MIP-Ag/TiO2 NTs were attributed to electron traps of Ag nanoparticles, and the footprint cavities formed by molecularly imprinted polymer. Shorter-chain PFCs were identified as main degradation products, and the PFOA degradation mechanism and pathway were proposed.

Keywords

Surface modification; Molecularly imprinted polymer; TiO2; Perfluorinated chemicals