TiO2 nanotube array modified with polypyrrole for efficient photoelectrocatalytic decolorization of methylene blue

Jialin Zhang, Zengyuan Pang, Qian Sun, Xin Chen, Yanan Zhu, Mengjuan Li, Jidong Wang, Hua Qiu, Xiaoqiang Li, Yonggui Li, Ioannis S. Chronakis*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this work, polypyrrole (PPy) was in situ polymerized on the surface of TiO2 nanotube array (TiO2 NTA, with average pore diameter of 110 nm and length of 490–750 nm) using cyclic voltammetry method to develop the nanocomposite photoelectrode of PPy@TiO2 NTA. The morphology and the physicochemical properties of the photoelectrode were characterized by SEM, XRD, FTIR, Raman Spectra, and XPS. It was found that the PPy modification enlarged the light adsorption range of the photoelectrode, as well as increased the photocurrent density under UV light irradiation. Furthermore, the performance of PPy@TiO2 NTA photoelectrode was investigated for the decolorization of methylene blue (MB) by means of photocatalytic (PC), electrocatalytic (EC) and photoelectrocatalytic (PEC) degradation. The decolorization rate of MB using the PPy@TiO2 NTA increased by 24.94% and 10.85% under PC and EC conditions, respectively, in comparison with the decolorization rate obtained using pristine TiO2 NTA. The improved decolorization rate of MB was mainly attributed to the separation efficiency of electron-hole pairs originated from TiO2, and the enhanced utilization of visible-light due to the presence of PPy. Furthermore, the decolorization rate of MB under the PEC condition was also significantly improved, compared with the sum of the decolorization rate of PC and EC systems, indicating the synergistic effect of MB oxidation in the photoelectrocatalysis.
Original languageEnglish
Article number153128
JournalJournal of Alloys and Compounds
Volume820
Number of pages10
ISSN0925-8388
DOIs
Publication statusPublished - 2020

Keywords

  • Photoelectrocatalysis
  • Synergistic effect
  • Nanocomposite
  • TiO2½Nanotube array
  • Polypyrrole

Cite this

Zhang, Jialin ; Pang, Zengyuan ; Sun, Qian ; Chen, Xin ; Zhu, Yanan ; Li, Mengjuan ; Wang, Jidong ; Qiu, Hua ; Li, Xiaoqiang ; Li, Yonggui ; Chronakis, Ioannis S. / TiO2 nanotube array modified with polypyrrole for efficient photoelectrocatalytic decolorization of methylene blue. In: Journal of Alloys and Compounds. 2020 ; Vol. 820.
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title = "TiO2 nanotube array modified with polypyrrole for efficient photoelectrocatalytic decolorization of methylene blue",
abstract = "In this work, polypyrrole (PPy) was in situ polymerized on the surface of TiO2 nanotube array (TiO2 NTA, with average pore diameter of 110 nm and length of 490–750 nm) using cyclic voltammetry method to develop the nanocomposite photoelectrode of PPy@TiO2 NTA. The morphology and the physicochemical properties of the photoelectrode were characterized by SEM, XRD, FTIR, Raman Spectra, and XPS. It was found that the PPy modification enlarged the light adsorption range of the photoelectrode, as well as increased the photocurrent density under UV light irradiation. Furthermore, the performance of PPy@TiO2 NTA photoelectrode was investigated for the decolorization of methylene blue (MB) by means of photocatalytic (PC), electrocatalytic (EC) and photoelectrocatalytic (PEC) degradation. The decolorization rate of MB using the PPy@TiO2 NTA increased by 24.94{\%} and 10.85{\%} under PC and EC conditions, respectively, in comparison with the decolorization rate obtained using pristine TiO2 NTA. The improved decolorization rate of MB was mainly attributed to the separation efficiency of electron-hole pairs originated from TiO2, and the enhanced utilization of visible-light due to the presence of PPy. Furthermore, the decolorization rate of MB under the PEC condition was also significantly improved, compared with the sum of the decolorization rate of PC and EC systems, indicating the synergistic effect of MB oxidation in the photoelectrocatalysis.",
keywords = "Photoelectrocatalysis, Synergistic effect, Nanocomposite, TiO2½Nanotube array, Polypyrrole",
author = "Jialin Zhang and Zengyuan Pang and Qian Sun and Xin Chen and Yanan Zhu and Mengjuan Li and Jidong Wang and Hua Qiu and Xiaoqiang Li and Yonggui Li and Chronakis, {Ioannis S.}",
year = "2020",
doi = "10.1016/j.jallcom.2019.153128",
language = "English",
volume = "820",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier",

}

TiO2 nanotube array modified with polypyrrole for efficient photoelectrocatalytic decolorization of methylene blue. / Zhang, Jialin; Pang, Zengyuan; Sun, Qian; Chen, Xin; Zhu, Yanan; Li, Mengjuan; Wang, Jidong; Qiu, Hua; Li, Xiaoqiang; Li, Yonggui; Chronakis, Ioannis S.

In: Journal of Alloys and Compounds, Vol. 820, 153128, 2020.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - TiO2 nanotube array modified with polypyrrole for efficient photoelectrocatalytic decolorization of methylene blue

AU - Zhang, Jialin

AU - Pang, Zengyuan

AU - Sun, Qian

AU - Chen, Xin

AU - Zhu, Yanan

AU - Li, Mengjuan

AU - Wang, Jidong

AU - Qiu, Hua

AU - Li, Xiaoqiang

AU - Li, Yonggui

AU - Chronakis, Ioannis S.

PY - 2020

Y1 - 2020

N2 - In this work, polypyrrole (PPy) was in situ polymerized on the surface of TiO2 nanotube array (TiO2 NTA, with average pore diameter of 110 nm and length of 490–750 nm) using cyclic voltammetry method to develop the nanocomposite photoelectrode of PPy@TiO2 NTA. The morphology and the physicochemical properties of the photoelectrode were characterized by SEM, XRD, FTIR, Raman Spectra, and XPS. It was found that the PPy modification enlarged the light adsorption range of the photoelectrode, as well as increased the photocurrent density under UV light irradiation. Furthermore, the performance of PPy@TiO2 NTA photoelectrode was investigated for the decolorization of methylene blue (MB) by means of photocatalytic (PC), electrocatalytic (EC) and photoelectrocatalytic (PEC) degradation. The decolorization rate of MB using the PPy@TiO2 NTA increased by 24.94% and 10.85% under PC and EC conditions, respectively, in comparison with the decolorization rate obtained using pristine TiO2 NTA. The improved decolorization rate of MB was mainly attributed to the separation efficiency of electron-hole pairs originated from TiO2, and the enhanced utilization of visible-light due to the presence of PPy. Furthermore, the decolorization rate of MB under the PEC condition was also significantly improved, compared with the sum of the decolorization rate of PC and EC systems, indicating the synergistic effect of MB oxidation in the photoelectrocatalysis.

AB - In this work, polypyrrole (PPy) was in situ polymerized on the surface of TiO2 nanotube array (TiO2 NTA, with average pore diameter of 110 nm and length of 490–750 nm) using cyclic voltammetry method to develop the nanocomposite photoelectrode of PPy@TiO2 NTA. The morphology and the physicochemical properties of the photoelectrode were characterized by SEM, XRD, FTIR, Raman Spectra, and XPS. It was found that the PPy modification enlarged the light adsorption range of the photoelectrode, as well as increased the photocurrent density under UV light irradiation. Furthermore, the performance of PPy@TiO2 NTA photoelectrode was investigated for the decolorization of methylene blue (MB) by means of photocatalytic (PC), electrocatalytic (EC) and photoelectrocatalytic (PEC) degradation. The decolorization rate of MB using the PPy@TiO2 NTA increased by 24.94% and 10.85% under PC and EC conditions, respectively, in comparison with the decolorization rate obtained using pristine TiO2 NTA. The improved decolorization rate of MB was mainly attributed to the separation efficiency of electron-hole pairs originated from TiO2, and the enhanced utilization of visible-light due to the presence of PPy. Furthermore, the decolorization rate of MB under the PEC condition was also significantly improved, compared with the sum of the decolorization rate of PC and EC systems, indicating the synergistic effect of MB oxidation in the photoelectrocatalysis.

KW - Photoelectrocatalysis

KW - Synergistic effect

KW - Nanocomposite

KW - TiO2½Nanotube array

KW - Polypyrrole

U2 - 10.1016/j.jallcom.2019.153128

DO - 10.1016/j.jallcom.2019.153128

M3 - Journal article

VL - 820

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

M1 - 153128

ER -