Hierarchical 3D TiO2 nanotube arrays sensitized by graphene oxide and Znx Cdy S for high performance photoelectrochemical applications

Bao, Ruiyu, Geng, Junfeng ORCID: 0000-0001-6246-0342, Sullivan, James A., Xia, Jianxin, Wang, Wenzhong, Wong, Wai-Yeung and Li, Hua (2018) Hierarchical 3D TiO2 nanotube arrays sensitized by graphene oxide and Znx Cdy S for high performance photoelectrochemical applications. physica status solidi (a), 215 (24). p. 1800436. ISSN 1862-6300

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Official URL: https://onlinelibrary.wiley.com/journal/18626319


Photocatalysis and photoelectrocatalysis are highly promising for applications in the energy and environment sectors. Several photocatalytic devices based on TiO2 nanotubes grown on two‐dimensional (2D) substrate (such as titanium foil) have been developed, but there has been little research on three‐dimensional (3D) TiO2 nanotubes which are expected to offer significantly enlarged surface area and much improved photocatalytic efficiency. Here, a method of building 3D TiO2 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 ZnxCdyS onto 3D TiO2 nanotubes, hierarchical nanotube arrays (ZnxCdyS/GO/3D‐TNTAs) are made by calcination‐deposition of graphene oxide followed by a facile successive ionic layer adsorption reaction (SILAR) treatment with ZnxCdyS. Characterization of the ZnxCdyS/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.

Item Type: Article
Uncontrolled Keywords: Electrical and Electronic Engineering, Materials Chemistry, Electronic, Optical and Magnetic Materials, Surfaces, Coatings and Films, Surfaces and Interfaces, Condensed Matter Physics
Subjects: T Technology > T Technology (General)
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TP Chemical technology
Divisions: School of Engineering > Engineering
SWORD Depositor: JISC Publications Router
Depositing User: JISC Publications Router
Date Deposited: 30 Apr 2019 10:57
Last Modified: 30 Apr 2019 10:57
Identification Number: 10.1002/pssa.201800436
Funders: Funder: National Natural Science Foundation of China; FundRef: 10.13039/501100001809; Grant(s): 51609271, Funder: Hong Kong Polytechnic University; FundRef: 10.13039/501100004377; Grant(s): 1-ZE1C, Funder: State Education Ministry, 111 Project; Grant(s): B08044, Funder: Independent Research Project for Master of Minzu University of China; Grant(s): 182109, Funder: Hong Kong Research Grants Council Poly; Grant(s): U123384/16P, Funder: Ms. Clarea Au for the Endowed Professorship in Energy; Grant(s): 847S
URI: http://ubir.bolton.ac.uk/id/eprint/2075

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