Hierarchical 3D TiO 2 Nanotube Arrays Sensitized by Graphene Oxide and Zn x Cd y S for High Performance Photoelectrochemical Applications

Ruiyu Bao, Junfeng Geng, James A. Sullivan, Jianxin Xia, Wenzhong Wang, Wai Yeung Wong, Hua Li

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Photocatalysis and photoelectrocatalysis are highly promising for applications in the energy and environment sectors. Several photocatalytic devices based on TiO 2 nanotubes grown on two-dimensional (2D) substrate (such as titanium foil) have been developed, but there has been little research on three-dimensional (3D) TiO 2 nanotubes which are expected to offer significantly enlarged surface area and much improved photocatalytic efficiency. Here, a method of building 3D TiO 2 nanotube arrays (3D-TNTAs) on titanium mesh by anodization via controlling the reaction time and electrolyte is reported. It is found that the electrochemically active area of such a titanium mesh is almost 4 times larger than that of the traditional titanium foil. Moreover, through making composites of graphene oxide and Zn x Cd y S onto 3D TiO 2 nanotubes, hierarchical nanotube arrays (Zn x Cd y S/GO/3D-TNTAs) are made by calcination-deposition of graphene oxide followed by a facile successive ionic layer adsorption reaction (SILAR) treatment with Zn x Cd y S. Characterization of the Zn x Cd y S/GO/3D-TNTAs indicates that this hierarchical multi-layered nanostructure has a much improved photoelectrochemical property due to the enlarged surface area and improved electron–hole separation capability, demonstrating the great potential for applications in photoelectrocatalytic devices for environmental technologies.

Original languageEnglish
Article number1800436
JournalPhysica Status Solidi (A) Applications and Materials Science
Volume215
Issue number24
DOIs
Publication statusPublished - 19 Dec 2018

Keywords

  • 3D TiO nanotube arrays
  • anodization
  • photoelectrochemical property
  • SILAR method

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Electrical and Electronic Engineering
  • Materials Chemistry

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