skip to main content

SciTech ConnectSciTech Connect

Title: Improving photoelectrochemical performance by building Fe{sub 2}O{sub 3} heterostructure on TiO{sub 2} nanorod arrays

Highlights: • Fe{sub 2}O{sub 3}@TiO{sub 2} heterostructure was fabricated by two-step method. • The photoelectrochemical properties were studied upon visible light irradiation. • Fe{sub 2}O{sub 3}@TiO{sub 2} heterostructure shows superior photoelectrochemical property. • A possible mechanism for enhanced photoelectrochemical property was put forward. - Abstract: Fe{sub 2}O{sub 3}@TiO{sub 2} heterostructure nanorod arrays were synthesized on a fluorine-doped tin oxide conductive (FTO) glass substrate via two-step method for improving photoelectrochemical activity of TiO{sub 2}. The TiO{sub 2} nanorod arrays on FTO substrate were first prepared by hydrothermal method and then Fe{sub 2}O{sub 3} nanoparticles were coated onto the surface of TiO{sub 2} nanorod arrays through chemical bath deposition. The heterojunction yielded a photocurrent density of 39.75 μA cm{sup −2} at a bias potential of 0 V (vs. Ag/AgCl) under visible light irradiation, which is 2.2 times as much as that produced by the pure TiO{sub 2} nanorod arrays. The enhanced photoelectrochemical activity is attributed to the extension of the light response range and efficient separation of photogenerated carriers. Our results have demonstrated the advantage of the novel Fe{sub 2}O{sub 3}@TiO{sub 2} heterojunction and will provide a new path to the fabrication of heterostructural materials.
Authors:
 [1] ;  [2] ;  [1] ;  [3] ;  [1] ;  [3] ;  [1]
  1. Department of Applied Physics, Chongqing University, Chongqing 400044 (China)
  2. (China)
  3. Key Laboratory of Special Power Supply, Chongqing Communication Institute, Chongqing 400035 (China)
Publication Date:
OSTI Identifier:
22475898
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 70; Other Information: Copyright (c) 2015 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; DEPOSITION; DOPED MATERIALS; ELECTROCHEMISTRY; FLUORINE; GLASS; HETEROJUNCTIONS; HYDROTHERMAL SYNTHESIS; IRON OXIDES; NANOPARTICLES; PERFORMANCE; SILVER CHLORIDES; SPECTROSCOPY; SUBSTRATES; SURFACES; TIN OXIDES; TITANIUM OXIDES; VISIBLE RADIATION