Novel dual-photoelectrode photoelectrocatalytic system based on TiO2 nanoneedle arrays photoanode and nitrogen-doped carbon dots/Co3O4 photocathode for efficient water purification at low/no applied voltage

Zhongzheng Hu; Minghua Zhou; Hubdar Ali Maitlo; Ruiheng Liang; Yang Zheng; Huizhong Wu; Xiang Ru Song; Omotayo A. Arotiba

doi:10.1016/j.apcatb.2023.122676

Novel dual-photoelectrode photoelectrocatalytic system based on TiO₂ nanoneedle arrays photoanode and nitrogen-doped carbon dots/Co₃O₄ photocathode for efficient water purification at low/no applied voltage

Zhongzheng Hu, Minghua Zhou, Hubdar Ali Maitlo, Ruiheng Liang, Yang Zheng, Huizhong Wu, Xiang Ru Song, Omotayo A. Arotiba

Chemical Sciences

Nankai University

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

27 Citations (Scopus)

Abstract

A novel tandem photoelectrocatalysis (PEC) cell consisting of TiO₂ nanoneedle arrays (TiO₂ NNs/Ti mesh) photoanode and nitrogen-doped carbon dots (NCDs) modified Co₃O₄ photocathode (NCDs/Co₃O₄/Ti mesh) is designed to work at low/no applied voltage. Electrochemical impedance spectroscopy, incident photo-to-current conversion efficiency, and open-circuit voltage confirmed enhancement in the photogenerated charge transfer efficiency and internal photovoltage, which is due to synergistic effect in combination of two photoelectrodes. Under light-emitting diode (LED) light irradiation and cell voltage of 0.4 V, the system represented high activity and stability (0.0527 min⁻¹ after 20 cycles) and energy efficiency (2.09 kWh m⁻³ order⁻¹) for sulfadiazine removal. Based on the main ^•OH-induced reaction, the cooperative operation mechanism of TiO₂ NNs/Ti mesh and NCDs/Co₃O₄/Ti mesh for sulfadiazine degradation was elaborated. Finally, the high performance under real water matrices or real sunlight irradiation without external voltage confirmed the feasibility of this PEC system in practical application for efficient water purification.

Original language	English
Article number	122676
Journal	Applied Catalysis B: Environmental
Volume	331
DOIs	https://doi.org/10.1016/j.apcatb.2023.122676
Publication status	Published - 15 Aug 2023

Keywords

Dual-photoelectrode
Low applied voltage
Mechanism
Photoelectrocatalysis
Water Purification

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

Access to Document

10.1016/j.apcatb.2023.122676

Fingerprint

Dive into the research topics of 'Novel dual-photoelectrode photoelectrocatalytic system based on TiO₂ nanoneedle arrays photoanode and nitrogen-doped carbon dots/Co₃O₄ photocathode for efficient water purification at low/no applied voltage'. Together they form a unique fingerprint.

Cite this

Hu, Z., Zhou, M., Maitlo, H. A., Liang, R., Zheng, Y., Wu, H., Song, X. R., & Arotiba, O. A. (2023). Novel dual-photoelectrode photoelectrocatalytic system based on TiO₂ nanoneedle arrays photoanode and nitrogen-doped carbon dots/Co₃O₄ photocathode for efficient water purification at low/no applied voltage. Applied Catalysis B: Environmental, 331, Article 122676. https://doi.org/10.1016/j.apcatb.2023.122676

@article{80c1209361c042f99f58b15830bb6ba1,

title = "Novel dual-photoelectrode photoelectrocatalytic system based on TiO2 nanoneedle arrays photoanode and nitrogen-doped carbon dots/Co3O4 photocathode for efficient water purification at low/no applied voltage",

abstract = "A novel tandem photoelectrocatalysis (PEC) cell consisting of TiO2 nanoneedle arrays (TiO2 NNs/Ti mesh) photoanode and nitrogen-doped carbon dots (NCDs) modified Co3O4 photocathode (NCDs/Co3O4/Ti mesh) is designed to work at low/no applied voltage. Electrochemical impedance spectroscopy, incident photo-to-current conversion efficiency, and open-circuit voltage confirmed enhancement in the photogenerated charge transfer efficiency and internal photovoltage, which is due to synergistic effect in combination of two photoelectrodes. Under light-emitting diode (LED) light irradiation and cell voltage of 0.4 V, the system represented high activity and stability (0.0527 min−1 after 20 cycles) and energy efficiency (2.09 kWh m−3 order−1) for sulfadiazine removal. Based on the main •OH-induced reaction, the cooperative operation mechanism of TiO2 NNs/Ti mesh and NCDs/Co3O4/Ti mesh for sulfadiazine degradation was elaborated. Finally, the high performance under real water matrices or real sunlight irradiation without external voltage confirmed the feasibility of this PEC system in practical application for efficient water purification.",

keywords = "Dual-photoelectrode, Low applied voltage, Mechanism, Photoelectrocatalysis, Water Purification",

author = "Zhongzheng Hu and Minghua Zhou and Maitlo, {Hubdar Ali} and Ruiheng Liang and Yang Zheng and Huizhong Wu and Song, {Xiang Ru} and Arotiba, {Omotayo A.}",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = aug,

day = "15",

doi = "10.1016/j.apcatb.2023.122676",

language = "English",

volume = "331",

journal = "Applied Catalysis B: Environmental",

issn = "0926-3373",

publisher = "Elsevier B.V.",

}

Hu, Z, Zhou, M, Maitlo, HA, Liang, R, Zheng, Y, Wu, H, Song, XR & Arotiba, OA 2023, 'Novel dual-photoelectrode photoelectrocatalytic system based on TiO₂ nanoneedle arrays photoanode and nitrogen-doped carbon dots/Co₃O₄ photocathode for efficient water purification at low/no applied voltage', Applied Catalysis B: Environmental, vol. 331, 122676. https://doi.org/10.1016/j.apcatb.2023.122676

Novel dual-photoelectrode photoelectrocatalytic system based on TiO₂ nanoneedle arrays photoanode and nitrogen-doped carbon dots/Co₃O₄ photocathode for efficient water purification at low/no applied voltage. / Hu, Zhongzheng; Zhou, Minghua; Maitlo, Hubdar Ali et al.
In: Applied Catalysis B: Environmental, Vol. 331, 122676, 15.08.2023.

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

TY - JOUR

T1 - Novel dual-photoelectrode photoelectrocatalytic system based on TiO2 nanoneedle arrays photoanode and nitrogen-doped carbon dots/Co3O4 photocathode for efficient water purification at low/no applied voltage

AU - Hu, Zhongzheng

AU - Zhou, Minghua

AU - Maitlo, Hubdar Ali

AU - Liang, Ruiheng

AU - Zheng, Yang

AU - Wu, Huizhong

AU - Song, Xiang Ru

AU - Arotiba, Omotayo A.

PY - 2023/8/15

Y1 - 2023/8/15

N2 - A novel tandem photoelectrocatalysis (PEC) cell consisting of TiO2 nanoneedle arrays (TiO2 NNs/Ti mesh) photoanode and nitrogen-doped carbon dots (NCDs) modified Co3O4 photocathode (NCDs/Co3O4/Ti mesh) is designed to work at low/no applied voltage. Electrochemical impedance spectroscopy, incident photo-to-current conversion efficiency, and open-circuit voltage confirmed enhancement in the photogenerated charge transfer efficiency and internal photovoltage, which is due to synergistic effect in combination of two photoelectrodes. Under light-emitting diode (LED) light irradiation and cell voltage of 0.4 V, the system represented high activity and stability (0.0527 min−1 after 20 cycles) and energy efficiency (2.09 kWh m−3 order−1) for sulfadiazine removal. Based on the main •OH-induced reaction, the cooperative operation mechanism of TiO2 NNs/Ti mesh and NCDs/Co3O4/Ti mesh for sulfadiazine degradation was elaborated. Finally, the high performance under real water matrices or real sunlight irradiation without external voltage confirmed the feasibility of this PEC system in practical application for efficient water purification.

AB - A novel tandem photoelectrocatalysis (PEC) cell consisting of TiO2 nanoneedle arrays (TiO2 NNs/Ti mesh) photoanode and nitrogen-doped carbon dots (NCDs) modified Co3O4 photocathode (NCDs/Co3O4/Ti mesh) is designed to work at low/no applied voltage. Electrochemical impedance spectroscopy, incident photo-to-current conversion efficiency, and open-circuit voltage confirmed enhancement in the photogenerated charge transfer efficiency and internal photovoltage, which is due to synergistic effect in combination of two photoelectrodes. Under light-emitting diode (LED) light irradiation and cell voltage of 0.4 V, the system represented high activity and stability (0.0527 min−1 after 20 cycles) and energy efficiency (2.09 kWh m−3 order−1) for sulfadiazine removal. Based on the main •OH-induced reaction, the cooperative operation mechanism of TiO2 NNs/Ti mesh and NCDs/Co3O4/Ti mesh for sulfadiazine degradation was elaborated. Finally, the high performance under real water matrices or real sunlight irradiation without external voltage confirmed the feasibility of this PEC system in practical application for efficient water purification.

KW - Dual-photoelectrode

KW - Low applied voltage

KW - Mechanism

KW - Photoelectrocatalysis

KW - Water Purification

UR - http://www.scopus.com/inward/record.url?scp=85151006016&partnerID=8YFLogxK

U2 - 10.1016/j.apcatb.2023.122676

DO - 10.1016/j.apcatb.2023.122676

M3 - Article

AN - SCOPUS:85151006016

SN - 0926-3373

VL - 331

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 122676

ER -