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[期刊论文]

In situ construction of N/Ti3+ codoped triphasic TiO2 layer on TiO2 nanotube arrays to improve photoelectrochemical performance

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author:

Lin, X. (Lin, X..) [1] | Sun, M. (Sun, M..) [2] | Yao, Y. (Yao, Y..) [3] | Unfold

Indexed by:

Scopus

Abstract:

Different numbers of N/Ti3+ codoped triphasic TiO2 layer are deposited on TiO2 nanotube arrays by hydrothermal reaction of TiN and TiO2 nanotube arrays. The crystal structure, morphology, and composition of the as-prepared samples and their photoelectrochemical properties are investigated and discussed. There are obviously red shift of the optical edge and enhanced visible light absorption for the resulting samples in the ultraviolet–visible diffuse reflectance spectroscopy. Besides, the photoelectrochemical tests indicate that the N/Ti3+ codoped triphasic TiO2-TiO2 nanotube array samples exhibit an enhanced photocurrent density and photovoltage under visible light irradiation. The maximum photoconversion efficiency of N/Ti3+ codoped triphasic TiO2-TiO2 nanotube array sample is 2.1 times higher than that of pristine TiO2 nanotube arrays. In addition, reduced impedance, higher carrier density, and excellent stability of photoelectrochemical performance of N/Ti3+ codoped triphasic TiO2-TiO2 nanotube array samples are also demonstrated. Finally, a plausible mechanism for the charge migration and separation on N/Ti3+ codoped triphasic TiO2-TiO2 nanotube array samples is proposed. This study provides a novel strategy to design and fabricate visible-light-driven TiO2 based composites and promote their applications in the field of solar energy utilization. © 2018 Elsevier Ltd

Keyword:

Homojunction; N/Ti3+ codoping; Photoelectrochemical performance; TiO2 nanotube arrays; Triphasic heterojunction

Community:

  • [ 1 ] [Lin, X.]School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
  • [ 2 ] [Sun, M.]School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
  • [ 3 ] [Sun, M.]Shanghai Collaborative Innovation Center of Laser Advanced Manufacturing Technology, Shanghai, 201620, China
  • [ 4 ] [Sun, M.]State Key Laboratory of Photocatalysis on Energy and Environment, Fuzhou University, Fuzhou, 350002, China
  • [ 5 ] [Yao, Y.]School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China
  • [ 6 ] [Yuan, X.]School of Materials Engineering, Shanghai University of Engineering Science, Shanghai, 201620, China

Reprint 's Address:

  • [Sun, M.]School of Materials Engineering, Shanghai University of Engineering ScienceChina

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Source :

Electrochimica Acta

ISSN: 0013-4686

Year: 2018

Volume: 291

Page: 319-327

5 . 3 8 3

JCR@2018

5 . 5 0 0

JCR@2023

ESI HC Threshold:209

JCR Journal Grade:1

CAS Journal Grade:2

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count: 40

30 Days PV: 0

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