Organic semiconductor g-C3N4 modified TiO2 nanotube arrays for enhanced photoelectrochemical performance in wastewater treatment

Lingjuan Liu; Guan Zhang; John Thomas Sirr Irvine; Yucheng Wu

doi:10.1002/ente.201500114

Organic semiconductor g-C₃N₄ modified TiO₂ nanotube arrays for enhanced photoelectrochemical performance in wastewater treatment

Lingjuan Liu, Guan Zhang, John Thomas Sirr Irvine, Yucheng Wu

Research output: Contribution to journal › Article › peer-review

Abstract

g-C3N4 sensitized TiO2 nanotube arrays (g-C3N4/TNTs) were fabricated by a simple solid sublimation and transition (SST) method using urea as precursor. The photoelectrochemical (PEC) performances were evaluated in this work. It is proposed that the g-C3N4 layer can play dual roles: surface sensitization and passivation of TNTs surface trap states to inhibit charge recombination. The g-C3N4/TNTs exhibited significantly improved PEC performance compared with TNTs under blue light (460 nm) irradiation. The g-C3N4/TNTs prepared from 3 g urea showed the highest photocurrent density of ca. 65 μA cm-2, which is almost 10 times as high as that of TNTs. Furthermore, g-C3N4/TNTs showed enhanced photoelectrocatalytic degradation of methylene blue (MB) under the blue light irradiation. The stable performance of degradation of MB in the multicycle tests suggests that the hybrid g-C3N4/TNTs electrode could be used as a low-cost photoelectrode material in wastewater treatment process.

Original language	English
Pages (from-to)	982-988
Journal	Energy Technology
Volume	3
Early online date	17 Jul 2015
DOIs	https://doi.org/10.1002/ente.201500114
Publication status	Published - Jul 2015

Keywords

g-C3N4
TiO2 nanotube arrays
Solid sublimation and transition
Visible light
Photoelectrochemcial performance

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10.1002/ente.201500114

Liu_et_al-2015-Energy_Technology
Copyright 2015 The Authors. Published by Wiley-VCH Verlag GmbH &Co. KGaA.This is an open access article under the terms of the Creative Commons Attribution License, which permits use,distribution and reproduction in any medium, provided the original work is properly cited.
Final published version, 1.84 MB

Cite this

@article{a41199525d8c4a61b99507a280fdd6bc,

title = "Organic semiconductor g-C3N4 modified TiO2 nanotube arrays for enhanced photoelectrochemical performance in wastewater treatment",

abstract = "g-C3N4 sensitized TiO2 nanotube arrays (g-C3N4/TNTs) were fabricated by a simple solid sublimation and transition (SST) method using urea as precursor. The photoelectrochemical (PEC) performances were evaluated in this work. It is proposed that the g-C3N4 layer can play dual roles: surface sensitization and passivation of TNTs surface trap states to inhibit charge recombination. The g-C3N4/TNTs exhibited significantly improved PEC performance compared with TNTs under blue light (460 nm) irradiation. The g-C3N4/TNTs prepared from 3 g urea showed the highest photocurrent density of ca. 65 μA cm-2, which is almost 10 times as high as that of TNTs. Furthermore, g-C3N4/TNTs showed enhanced photoelectrocatalytic degradation of methylene blue (MB) under the blue light irradiation. The stable performance of degradation of MB in the multicycle tests suggests that the hybrid g-C3N4/TNTs electrode could be used as a low-cost photoelectrode material in wastewater treatment process.",

keywords = "g-C3N4, TiO2 nanotube arrays, Solid sublimation and transition, Visible light, Photoelectrochemcial performance",

author = "Lingjuan Liu and Guan Zhang and Irvine, \{John Thomas Sirr\} and Yucheng Wu",

note = "This work was supported by China Scholarship Council (CSC), Royal Society of Edinburgh (RSE) and Engineering and Physical Sciences Research Council (EPSRC). Date of Acceptance: 27/05/2015",

year = "2015",

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doi = "10.1002/ente.201500114",

language = "English",

volume = "3",

pages = "982--988",

journal = "Energy Technology",

issn = "2194-4296",

publisher = "Wiley-VCH, Weinheim",

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T1 - Organic semiconductor g-C3N4 modified TiO2 nanotube arrays for enhanced photoelectrochemical performance in wastewater treatment

AU - Liu, Lingjuan

AU - Zhang, Guan

AU - Irvine, John Thomas Sirr

AU - Wu, Yucheng

N1 - This work was supported by China Scholarship Council (CSC), Royal Society of Edinburgh (RSE) and Engineering and Physical Sciences Research Council (EPSRC). Date of Acceptance: 27/05/2015

PY - 2015/7

Y1 - 2015/7

N2 - g-C3N4 sensitized TiO2 nanotube arrays (g-C3N4/TNTs) were fabricated by a simple solid sublimation and transition (SST) method using urea as precursor. The photoelectrochemical (PEC) performances were evaluated in this work. It is proposed that the g-C3N4 layer can play dual roles: surface sensitization and passivation of TNTs surface trap states to inhibit charge recombination. The g-C3N4/TNTs exhibited significantly improved PEC performance compared with TNTs under blue light (460 nm) irradiation. The g-C3N4/TNTs prepared from 3 g urea showed the highest photocurrent density of ca. 65 μA cm-2, which is almost 10 times as high as that of TNTs. Furthermore, g-C3N4/TNTs showed enhanced photoelectrocatalytic degradation of methylene blue (MB) under the blue light irradiation. The stable performance of degradation of MB in the multicycle tests suggests that the hybrid g-C3N4/TNTs electrode could be used as a low-cost photoelectrode material in wastewater treatment process.

AB - g-C3N4 sensitized TiO2 nanotube arrays (g-C3N4/TNTs) were fabricated by a simple solid sublimation and transition (SST) method using urea as precursor. The photoelectrochemical (PEC) performances were evaluated in this work. It is proposed that the g-C3N4 layer can play dual roles: surface sensitization and passivation of TNTs surface trap states to inhibit charge recombination. The g-C3N4/TNTs exhibited significantly improved PEC performance compared with TNTs under blue light (460 nm) irradiation. The g-C3N4/TNTs prepared from 3 g urea showed the highest photocurrent density of ca. 65 μA cm-2, which is almost 10 times as high as that of TNTs. Furthermore, g-C3N4/TNTs showed enhanced photoelectrocatalytic degradation of methylene blue (MB) under the blue light irradiation. The stable performance of degradation of MB in the multicycle tests suggests that the hybrid g-C3N4/TNTs electrode could be used as a low-cost photoelectrode material in wastewater treatment process.

KW - g-C3N4

KW - TiO2 nanotube arrays

KW - Solid sublimation and transition

KW - Visible light

KW - Photoelectrochemcial performance

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U2 - 10.1002/ente.201500114

DO - 10.1002/ente.201500114

M3 - Article

SN - 2194-4296

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SP - 982

EP - 988

JO - Energy Technology

JF - Energy Technology

ER -

Organic semiconductor g-C₃N₄ modified TiO₂ nanotube arrays for enhanced photoelectrochemical performance in wastewater treatment

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Energy Materials Discovery: Energy Materials Discovery Characterisation and Application

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Organic semiconductor g-C3N4 modified TiO2 nanotube arrays for enhanced photoelectrochemical performance in wastewater treatment

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Energy Materials Discovery: Energy Materials Discovery Characterisation and Application

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Organic semiconductor g-C₃N₄ modified TiO₂ nanotube arrays for enhanced photoelectrochemical performance in wastewater treatment