Synergistic role of hydrogen treatment and heterojunction in H-WO3-x/TiO2-x NT/Ti foil-based photoanodes for photoelectrochemical wastewater detoxification and antibacterial activity

Mahadeo A. Mahadik; In Seon Hwang; Weon Sik Chae; Hyun Hwi Lee; Sun Hee Choi; Min Cho; J. S. Jang

doi:10.1016/j.chemosphere.2023.137973

Synergistic role of hydrogen treatment and heterojunction in H-WO_3-x/TiO_2-x NT/Ti foil-based photoanodes for photoelectrochemical wastewater detoxification and antibacterial activity

Mahadeo A. Mahadik
, In Seon Hwang
, Weon Sik Chae
, Hyun Hwi Lee
, Sun Hee Choi
, Min Cho^*
, J. S. Jang^*

^*Corresponding author for this work

Environmental Biotechnology

Jeonbuk National University
Korea Basic Science Institute
Pohang University of Science and Technology

Research output: Contribution to journal › Journal article › peer-review

11 Scopus citations

Abstract

The process of photoelectrochemical wastewater detoxification is limited by significant charge recombination, which is difficult to suppress with efficient single-material photoanodes. We demonstrated the effectiveness of hydrogen treatment in evaluating charge separation properties in WO_3-x/TiO_2-x NT/Ti foil heterojunction photoanodes. The influence of varying hydrogen annealing (200–400 °C) on the structural and photoelectrochemical properties of WO₃/TiO₂ NS/NT heterojunction is studied systematically. Additionally, after hydrogen treatment of pristine WO₃/TiO₂ NT/Ti foil photoanodes, substoichiometric H-WO_3-x/TiO_2-x NT-300 achieved the 1.21 mA/cm² photocurrent density, which is 8.06 and 3.27 times than TiO₂ NT and WO₃/TiO₂ NT. The hydrogen-treated H-WO_3-x/TiO_2-x NT-300 electrode exhibits 3 times greater bulk efficiencies than the WO₃/TiO₂ NT electrode due to the production of oxygen vacancies at the interface. Additionally, optimum H-WO_3-x/TiO_2-x NS/NT-300 photoanode exhibited 93.8% E. coli and 99.8% BPA decomposition efficiencies. The present work shows the effectiveness of microwave-assisted H-WO_3-x/TiO_2-x NT heterojunction photoanodes for organic decomposition and antibacterial activity in a neutral environment without surface-loaded co-catalysts.

Original language	English
Article number	137973
Journal	Chemosphere
Volume	318
DOIs	https://doi.org/10.1016/j.chemosphere.2023.137973
State	Published - 2023.03

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 6 Clean Water and Sanitation

Keywords

Heterojunction
Hydrogen treatment
Microwave synthesis
Oxygen vacancy
Wastewater detoxification

Quacquarelli Symonds(QS) Subject Topics

Environmental Sciences
Medicine
Engineering - Petroleum
Chemistry

Access to Document

10.1016/j.chemosphere.2023.137973

Cite this

@article{24d61f0a42134ca78b012ef097dfcc95,

title = "Synergistic role of hydrogen treatment and heterojunction in H-WO3-x/TiO2-x NT/Ti foil-based photoanodes for photoelectrochemical wastewater detoxification and antibacterial activity",

abstract = "The process of photoelectrochemical wastewater detoxification is limited by significant charge recombination, which is difficult to suppress with efficient single-material photoanodes. We demonstrated the effectiveness of hydrogen treatment in evaluating charge separation properties in WO3-x/TiO2-x NT/Ti foil heterojunction photoanodes. The influence of varying hydrogen annealing (200{\textendash}400 °C) on the structural and photoelectrochemical properties of WO3/TiO2 NS/NT heterojunction is studied systematically. Additionally, after hydrogen treatment of pristine WO3/TiO2 NT/Ti foil photoanodes, substoichiometric H-WO3-x/TiO2-x NT-300 achieved the 1.21 mA/cm2 photocurrent density, which is 8.06 and 3.27 times than TiO2 NT and WO3/TiO2 NT. The hydrogen-treated H-WO3-x/TiO2-x NT-300 electrode exhibits 3 times greater bulk efficiencies than the WO3/TiO2 NT electrode due to the production of oxygen vacancies at the interface. Additionally, optimum H-WO3-x/TiO2-x NS/NT-300 photoanode exhibited 93.8\% E. coli and 99.8\% BPA decomposition efficiencies. The present work shows the effectiveness of microwave-assisted H-WO3-x/TiO2-x NT heterojunction photoanodes for organic decomposition and antibacterial activity in a neutral environment without surface-loaded co-catalysts.",

keywords = "Heterojunction, Hydrogen treatment, Microwave synthesis, Oxygen vacancy, Wastewater detoxification",

author = "Mahadik, \{Mahadeo A.\} and Hwang, \{In Seon\} and Chae, \{Weon Sik\} and Lee, \{Hyun Hwi\} and Choi, \{Sun Hee\} and Min Cho and Jang, \{J. S.\}",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = mar,

doi = "10.1016/j.chemosphere.2023.137973",

language = "English",

volume = "318",

journal = "Chemosphere",

issn = "0045-6535",

}

TY - JOUR

T1 - Synergistic role of hydrogen treatment and heterojunction in H-WO3-x/TiO2-x NT/Ti foil-based photoanodes for photoelectrochemical wastewater detoxification and antibacterial activity

AU - Mahadik, Mahadeo A.

AU - Hwang, In Seon

AU - Chae, Weon Sik

AU - Lee, Hyun Hwi

AU - Choi, Sun Hee

AU - Cho, Min

AU - Jang, J. S.

PY - 2023/3

Y1 - 2023/3

N2 - The process of photoelectrochemical wastewater detoxification is limited by significant charge recombination, which is difficult to suppress with efficient single-material photoanodes. We demonstrated the effectiveness of hydrogen treatment in evaluating charge separation properties in WO3-x/TiO2-x NT/Ti foil heterojunction photoanodes. The influence of varying hydrogen annealing (200–400 °C) on the structural and photoelectrochemical properties of WO3/TiO2 NS/NT heterojunction is studied systematically. Additionally, after hydrogen treatment of pristine WO3/TiO2 NT/Ti foil photoanodes, substoichiometric H-WO3-x/TiO2-x NT-300 achieved the 1.21 mA/cm2 photocurrent density, which is 8.06 and 3.27 times than TiO2 NT and WO3/TiO2 NT. The hydrogen-treated H-WO3-x/TiO2-x NT-300 electrode exhibits 3 times greater bulk efficiencies than the WO3/TiO2 NT electrode due to the production of oxygen vacancies at the interface. Additionally, optimum H-WO3-x/TiO2-x NS/NT-300 photoanode exhibited 93.8% E. coli and 99.8% BPA decomposition efficiencies. The present work shows the effectiveness of microwave-assisted H-WO3-x/TiO2-x NT heterojunction photoanodes for organic decomposition and antibacterial activity in a neutral environment without surface-loaded co-catalysts.

AB - The process of photoelectrochemical wastewater detoxification is limited by significant charge recombination, which is difficult to suppress with efficient single-material photoanodes. We demonstrated the effectiveness of hydrogen treatment in evaluating charge separation properties in WO3-x/TiO2-x NT/Ti foil heterojunction photoanodes. The influence of varying hydrogen annealing (200–400 °C) on the structural and photoelectrochemical properties of WO3/TiO2 NS/NT heterojunction is studied systematically. Additionally, after hydrogen treatment of pristine WO3/TiO2 NT/Ti foil photoanodes, substoichiometric H-WO3-x/TiO2-x NT-300 achieved the 1.21 mA/cm2 photocurrent density, which is 8.06 and 3.27 times than TiO2 NT and WO3/TiO2 NT. The hydrogen-treated H-WO3-x/TiO2-x NT-300 electrode exhibits 3 times greater bulk efficiencies than the WO3/TiO2 NT electrode due to the production of oxygen vacancies at the interface. Additionally, optimum H-WO3-x/TiO2-x NS/NT-300 photoanode exhibited 93.8% E. coli and 99.8% BPA decomposition efficiencies. The present work shows the effectiveness of microwave-assisted H-WO3-x/TiO2-x NT heterojunction photoanodes for organic decomposition and antibacterial activity in a neutral environment without surface-loaded co-catalysts.

KW - Heterojunction

KW - Hydrogen treatment

KW - Microwave synthesis

KW - Oxygen vacancy

KW - Wastewater detoxification

UR - https://www.scopus.com/pages/publications/85147266455

U2 - 10.1016/j.chemosphere.2023.137973

DO - 10.1016/j.chemosphere.2023.137973

M3 - Journal article

C2 - 36709844

AN - SCOPUS:85147266455

SN - 0045-6535

VL - 318

JO - Chemosphere

JF - Chemosphere

M1 - 137973

ER -