Issue 65, 2015

Photodeposition synthesis of a ZnO nanoporous layer

Abstract

An original photodeposition methodology is investigated to synthesize novel ZnO nanoporous layers with high uniformity and pore density via TiO2 nanotube substrates (annealed at 450 °C under 10−2 Pa for 8 hours) immersed in Zn(NO3)2 aqueous solution (1 mol L−1) and irradiated by ultraviolet (UV) light at room temperature for 12 hours. Characterization of the material highlights that the nanoporous layer is assembled by the dominant (10[1 with combining macron]1) crystal plane of hexagonal wurtzite ZnO with a vertical sheet thickness of about 20 nm and an aperture diameter of around 100 nm. Vacuum annealing of the TiO2 substrate ultimately impacts the uniformity of the ZnO nanoporous layer, which can be essentially attributed to the density of the substrate oxygen vacancies. However, the concentration of the Zn(NO3)2 aqueous solution significantly influences the morphology and pore density of the porous layer. Furthermore, the ZnO nanoporous layer enhances the photoelectric properties of pure TiO2 nanotubes, which may provide general application prospects in photocatalysis and photoelectric devices.

Graphical abstract: Photodeposition synthesis of a ZnO nanoporous layer

Article information

Article type
Paper
Submitted
27 Apr 2015
Accepted
26 May 2015
First published
26 May 2015

RSC Adv., 2015,5, 52998-53002

Author version available

Photodeposition synthesis of a ZnO nanoporous layer

J. Guan, H. Wang, H. Liang, N. Cheng, H. Lin, Q. Li, Y. Li and L. Qin, RSC Adv., 2015, 5, 52998 DOI: 10.1039/C5RA07556D

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