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Title: Wafer-scale two-dimensional Au-TiO{sub 2} bilayer films for photocatalytic degradation of Palmitic acid under UV and visible light illumination

Abstract

Highlights: • Successful wafer-scale atomic layer deposition of 2D Au-TiO{sub 2} bilayer photocatalyst films. • The efficient degradation of fatty acid by tailoring 2D TiO{sub 2} films under UV and visible light illumination. • Improved visible light photocatalytic activity and photocurrent density of 2D Au-TiO{sub 2} bilayer films. • Comparable photocatalytic performance of ultra-thin 2D TiO{sub 2} and thick TiO{sub 2} films under UV light illumination. - Abstract: Bilayer Au-TiO{sub 2} configuration with two-dimensional (2D) TiO{sub 2} films enabled sensible improvement in photocatalytic degradation of Palmitic Acid (PA) and also the enhancement of current density under visible light illumination. The improved visible light photocatalytic and photocurrent properties were attained when 35 nm thick 2D TiO{sub 2} film was developed by atomic layer deposition (ALD) on Si/SiO{sub 2}-Au substrate. The Au-TiO{sub 2} bilayer demonstrated the improved photocatalytic and photovoltaic performances compared with those TiO{sub 2} films developed on Si/SiO{sub 2} bare substrate. These improvements can be attributed to the plasmonic effects of Au film acting as antenna for visible light and also serving as hole acceptor during photocatalysis process. The proposed mechanisms for enhanced visible light performance of bilayer films are hot electron injection and the formation of hot spots atmore » Au-TiO{sub 2} interface which contributed to the electron injection to conduction band of TiO{sub 2} or facilitated the separation of generated electron-hole pairs at Au-TiO{sub 2} Schottky junction.« less

Authors:
;  [1];  [2];  [1]
  1. Ghent University Global Campus, Department of Applied Analytical & Physical Chemistry, Faculty of Bioscience Engineering, 119 Songdomunhwa-ro, Yeonsu-gu, Incheon (Korea, Republic of)
  2. Micro and Nano System Research Center, Taiyuan University of Technology, Taiyuan 030024, Shanxi (China)
Publication Date:
OSTI Identifier:
22730461
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 95; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; CATALYSTS; CURRENT DENSITY; DEPOSITION; ELECTRON BEAM INJECTION; FILMS; HEXADECANOIC ACID; ILLUMINANCE; INFRARED SPECTRA; OXIDATION; PALLADIUM; PHOTOCATALYSIS; PHOTOVOLTAIC EFFECT; SILICA; TITANIUM OXIDES; TWO-DIMENSIONAL CALCULATIONS; ULTRAVIOLET RADIATION; VISIBLE RADIATION

Citation Formats

Karbalaei Akbari, Mohammad, E-mail: Mohammad.akbari@ugent.be, Hai, Zhenyin, Wei, Zihan, Hu, Jie, and Zhuiykov, Serge. Wafer-scale two-dimensional Au-TiO{sub 2} bilayer films for photocatalytic degradation of Palmitic acid under UV and visible light illumination. United States: N. p., 2017. Web. doi:10.1016/J.MATERRESBULL.2017.08.001.
Karbalaei Akbari, Mohammad, E-mail: Mohammad.akbari@ugent.be, Hai, Zhenyin, Wei, Zihan, Hu, Jie, & Zhuiykov, Serge. Wafer-scale two-dimensional Au-TiO{sub 2} bilayer films for photocatalytic degradation of Palmitic acid under UV and visible light illumination. United States. https://doi.org/10.1016/J.MATERRESBULL.2017.08.001
Karbalaei Akbari, Mohammad, E-mail: Mohammad.akbari@ugent.be, Hai, Zhenyin, Wei, Zihan, Hu, Jie, and Zhuiykov, Serge. Wed . "Wafer-scale two-dimensional Au-TiO{sub 2} bilayer films for photocatalytic degradation of Palmitic acid under UV and visible light illumination". United States. https://doi.org/10.1016/J.MATERRESBULL.2017.08.001.
@article{osti_22730461,
title = {Wafer-scale two-dimensional Au-TiO{sub 2} bilayer films for photocatalytic degradation of Palmitic acid under UV and visible light illumination},
author = {Karbalaei Akbari, Mohammad, E-mail: Mohammad.akbari@ugent.be and Hai, Zhenyin and Wei, Zihan and Hu, Jie and Zhuiykov, Serge},
abstractNote = {Highlights: • Successful wafer-scale atomic layer deposition of 2D Au-TiO{sub 2} bilayer photocatalyst films. • The efficient degradation of fatty acid by tailoring 2D TiO{sub 2} films under UV and visible light illumination. • Improved visible light photocatalytic activity and photocurrent density of 2D Au-TiO{sub 2} bilayer films. • Comparable photocatalytic performance of ultra-thin 2D TiO{sub 2} and thick TiO{sub 2} films under UV light illumination. - Abstract: Bilayer Au-TiO{sub 2} configuration with two-dimensional (2D) TiO{sub 2} films enabled sensible improvement in photocatalytic degradation of Palmitic Acid (PA) and also the enhancement of current density under visible light illumination. The improved visible light photocatalytic and photocurrent properties were attained when 35 nm thick 2D TiO{sub 2} film was developed by atomic layer deposition (ALD) on Si/SiO{sub 2}-Au substrate. The Au-TiO{sub 2} bilayer demonstrated the improved photocatalytic and photovoltaic performances compared with those TiO{sub 2} films developed on Si/SiO{sub 2} bare substrate. These improvements can be attributed to the plasmonic effects of Au film acting as antenna for visible light and also serving as hole acceptor during photocatalysis process. The proposed mechanisms for enhanced visible light performance of bilayer films are hot electron injection and the formation of hot spots at Au-TiO{sub 2} interface which contributed to the electron injection to conduction band of TiO{sub 2} or facilitated the separation of generated electron-hole pairs at Au-TiO{sub 2} Schottky junction.},
doi = {10.1016/J.MATERRESBULL.2017.08.001},
url = {https://www.osti.gov/biblio/22730461}, journal = {Materials Research Bulletin},
issn = {0025-5408},
number = ,
volume = 95,
place = {United States},
year = {2017},
month = {11}
}