Plasmonic Au nanoparticles supported on both sides of TiO2 hollow spheres for maximising photocatalytic activity under visible light

2019, Volume 13, Issue 4

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Frontiers of Chemical Science and Engineering >> 2019, Volume 13, Issue 4 doi: 10.1007/s11705-019-1815-2

Plasmonic Au nanoparticles supported on both sides of TiO2 hollow spheres for maximising photocatalytic activity under visible light

. Collaborative Innovation Center of Chemical Science and Engineering, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.. School of Chemical Engineering and Analytical Science, The University of Manchester, Manchester, M13 9PL, UK.. Department of Mechanical & Construction Engineering, University of Northumbria, Newcastle upon Tyne, NE1 8ST, UK.. Advanced Manufacturing Institute of Polymer Industry (AMIPI), Shenyang University of Chemical Technology, Shenyang 110142, China

Accepted: 2019-04-26 Available online: 2019-04-26

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Abstract

A strategy of intensifying the visible light harvesting ability of anatase TiO hollow spheres (HSs) was developed, in which both sides of TiO HSs were utilised for stabilising Au nanoparticles (NPs) through the sacrificial templating method and convex surface-induced confinement. The composite structure of single Au NP yolk-TiO shell-Au NPs, denoted as Au@Au(TiO , was rendered and confirmed by the transmission electron microscopy analysis. Au@Au(TiO showed enhanced photocatalytic activity in the degradation of methylene blue and phenol in aqueous phase under visible light surpassing that of other reference materials such as Au(TiO by 77% and Au@P25 by 52%, respectively, in phenol degradation.

Keywords

TiO₂ hollow spheres ; plasmonic Au nanoparticles ; confinement ; visible light ; photocatalytic degradation

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