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Title: Photoelectrochemical performance of CdS nanorods grafted vertically aligned TiO{sub 2} nanorods

Graphical abstract: - Highlights: • TiO{sub 2} nanorods/CdS nanorods composite samples were successfully achieved. • The photocurrent density increased by 100 percent compared with pure TiO{sub 2}. • Photocurrent density increase mechanism of this photoanode was also forecasted. - Abstract: In this study, TiO{sub 2} nanorods/CdS nanorods composite samples were successfully synthesized by grafting CdS nanorods on vertically aligned TiO{sub 2} nanorods. A two-step hydrothermal method was used to prepare the samples. Some properties of the samples, such as morphological, structural, and optical properties were characterized by energy-dispersive X-ray detection, field emission scanning electron microscopy, X-ray diffraction, Raman spectroscopy, and ultraviolet-visible spectroscopy. Moreover, photoelectrochemical properties were studied via current-voltage and photocurrent spectrum measurements. The results showed that CdS nanorods grafted on top of TiO{sub 2} nanorods like a lawn. The amount grafted as well as the diameter and crystallinity of CdS nanorods increased first and then decreased as the grafting time increased, due to Ostwald ripening. Under the back-side illumination, the composite film with 2 h grafting time exhibited the highest photocurrent density which was almost twice of that of the pure TiO{sub 2} nanorods.
Authors:
;  [1] ;  [2] ;  [1] ;  [3] ;  [1]
  1. International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering (MFPE), Xi’an Jiaotong University (XJTU), No. 28 West Xianning Road, Xi’an 710049 (China)
  2. Department of Materials Science and Engineering, University of North Texas, Denton, TX 76203 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
22285189
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 11; Other Information: Copyright (c) 2013 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:
36 MATERIALS SCIENCE; CADMIUM SULFIDES; CRYSTAL GROWTH; HYDROTHERMAL SYNTHESIS; NANOSTRUCTURES; OPTICAL PROPERTIES; RAMAN SPECTROSCOPY; SCANNING ELECTRON MICROSCOPY; THIN FILMS; TITANIUM OXIDES; X-RAY DIFFRACTION