Construction of dual Z-scheme g-C3N4/Bi4Ti3O12/Bi4O5I2 heterojunction for visible and solar powered coupled photocatalytic antibiotic degradation and hydrogen production: Boosting via I−/I3− and Bi3+/Bi5+ redox mediators

Amit Kumar; Gaurav Sharma; Anu Kumari; Changsheng Guo; Mu Naushad; Dai Viet N. Vo; Jibran Iqbal; Florian J. Stadler

doi:10.1016/j.apcatb.2020.119808

Construction of dual Z-scheme g-C₃N₄/Bi₄Ti₃O₁₂/Bi₄O₅I₂ heterojunction for visible and solar powered coupled photocatalytic antibiotic degradation and hydrogen production: Boosting via I⁻/I₃⁻ and Bi³⁺/Bi⁵⁺ redox mediators

Amit Kumar^*
, Gaurav Sharma
, Anu Kumari
, Changsheng Guo
, Mu Naushad
, Dai Viet N. Vo
, Jibran Iqbal
, Florian J. Stadler

^*Corresponding author for this work

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

345 Scopus citations

Abstract

Inspired by waste to energy production, we report construction of dual Z-scheme advanced photocatalyst g-C₃N₄/Bi₄Ti₃O₁₂/Bi₄O₅I₂ heterojunction for coupled photocatalytic H₂ evolution and degradation of antibiotics with high efficiency. The optimal CTBT-30 i.e (40 %g-C₃N₄/Bi₄Ti₃O₁₂)/30 % Bi₄O₅I₂ photocatalyst exhibited an excellent rate of H₂ production under visible light (56.2 mmol g⁻¹ h⁻¹) along with simultaneous 87.1 % ofloxacin (OFL) removal. The H₂ production rate is manifolds higher than in ultrapure water, sulfadiazine, rhodamine B and higher in hole scavenging triethanolamine. The interfacial intimate coupling with well-matched energy bands, foster the charge separation with effective Z-scheme transfer facilitated by I₃⁻/I⁻ and Bi³⁺/Bi⁵⁺ and redox mediators. The scavenging of majority of holes for direct oxidation or via ^[rad]OH radical formation leaves photogenerated electrons (at CB of g-C₃N₄ and Bi₄O₅I₂) free for H₂ evolution from H₂O. Such work is promising for designing high photo-absorbing heterojunction photocatalysts for dual functionalities of clean energy production and environmental detoxification.

Original language	English
Article number	119808
Journal	Applied Catalysis B: Environmental
Volume	284
DOIs	https://doi.org/10.1016/j.apcatb.2020.119808
State	Published - 5 May 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2020 Elsevier B.V.

UN SDGs

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

SDG 7 Affordable and Clean Energy
SDG 12 Responsible Consumption and Production

Keywords

Antibitoic degradation
Charge separation
Dual Z-scheme g-CN/BiTiO/BiOI
Simultaneous H evolution
Visible light photocatalysis

ASJC Scopus subject areas

Catalysis
General Environmental Science
Process Chemistry and Technology

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Kumar, A., Sharma, G., Kumari, A., Guo, C., Naushad, M., Vo, D. V. N., Iqbal, J., & Stadler, F. J. (2021). Construction of dual Z-scheme g-C₃N₄/Bi₄Ti₃O₁₂/Bi₄O₅I₂ heterojunction for visible and solar powered coupled photocatalytic antibiotic degradation and hydrogen production: Boosting via I⁻/I₃⁻ and Bi³⁺/Bi⁵⁺ redox mediators. Applied Catalysis B: Environmental, 284, Article 119808. https://doi.org/10.1016/j.apcatb.2020.119808

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title = "Construction of dual Z-scheme g-C3N4/Bi4Ti3O12/Bi4O5I2 heterojunction for visible and solar powered coupled photocatalytic antibiotic degradation and hydrogen production: Boosting via I−/I3− and Bi3+/Bi5+ redox mediators",

abstract = "Inspired by waste to energy production, we report construction of dual Z-scheme advanced photocatalyst g-C3N4/Bi4Ti3O12/Bi4O5I2 heterojunction for coupled photocatalytic H2 evolution and degradation of antibiotics with high efficiency. The optimal CTBT-30 i.e (40 \%g-C3N4/Bi4Ti3O12)/30 \% Bi4O5I2 photocatalyst exhibited an excellent rate of H2 production under visible light (56.2 mmol g−1 h−1) along with simultaneous 87.1 \% ofloxacin (OFL) removal. The H2 production rate is manifolds higher than in ultrapure water, sulfadiazine, rhodamine B and higher in hole scavenging triethanolamine. The interfacial intimate coupling with well-matched energy bands, foster the charge separation with effective Z-scheme transfer facilitated by I3−/I− and Bi3+/Bi5+ and redox mediators. The scavenging of majority of holes for direct oxidation or via [rad]OH radical formation leaves photogenerated electrons (at CB of g-C3N4 and Bi4O5I2) free for H2 evolution from H2O. Such work is promising for designing high photo-absorbing heterojunction photocatalysts for dual functionalities of clean energy production and environmental detoxification.",

keywords = "Antibitoic degradation, Charge separation, Dual Z-scheme g-CN/BiTiO/BiOI, Simultaneous H evolution, Visible light photocatalysis",

author = "Amit Kumar and Gaurav Sharma and Anu Kumari and Changsheng Guo and Mu Naushad and Vo, \{Dai Viet N.\} and Jibran Iqbal and Stadler, \{Florian J.\}",

note = "Publisher Copyright: {\textcopyright} 2020 Elsevier B.V.",

year = "2021",

month = may,

day = "5",

doi = "10.1016/j.apcatb.2020.119808",

language = "English",

volume = "284",

journal = "Applied Catalysis B: Environmental",

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Kumar, A, Sharma, G, Kumari, A, Guo, C, Naushad, M, Vo, DVN, Iqbal, J & Stadler, FJ 2021, 'Construction of dual Z-scheme g-C₃N₄/Bi₄Ti₃O₁₂/Bi₄O₅I₂ heterojunction for visible and solar powered coupled photocatalytic antibiotic degradation and hydrogen production: Boosting via I⁻/I₃⁻ and Bi³⁺/Bi⁵⁺ redox mediators', Applied Catalysis B: Environmental, vol. 284, 119808. https://doi.org/10.1016/j.apcatb.2020.119808

Construction of dual Z-scheme g-C₃N₄/Bi₄Ti₃O₁₂/Bi₄O₅I₂ heterojunction for visible and solar powered coupled photocatalytic antibiotic degradation and hydrogen production: Boosting via I⁻/I₃⁻ and Bi³⁺/Bi⁵⁺ redox mediators. / Kumar, Amit; Sharma, Gaurav; Kumari, Anu et al.
In: Applied Catalysis B: Environmental, Vol. 284, 119808, 05.05.2021.

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

TY - JOUR

T1 - Construction of dual Z-scheme g-C3N4/Bi4Ti3O12/Bi4O5I2 heterojunction for visible and solar powered coupled photocatalytic antibiotic degradation and hydrogen production

T2 - Boosting via I−/I3− and Bi3+/Bi5+ redox mediators

AU - Kumar, Amit

AU - Sharma, Gaurav

AU - Kumari, Anu

AU - Guo, Changsheng

AU - Naushad, Mu

AU - Vo, Dai Viet N.

AU - Iqbal, Jibran

AU - Stadler, Florian J.

PY - 2021/5/5

Y1 - 2021/5/5

N2 - Inspired by waste to energy production, we report construction of dual Z-scheme advanced photocatalyst g-C3N4/Bi4Ti3O12/Bi4O5I2 heterojunction for coupled photocatalytic H2 evolution and degradation of antibiotics with high efficiency. The optimal CTBT-30 i.e (40 %g-C3N4/Bi4Ti3O12)/30 % Bi4O5I2 photocatalyst exhibited an excellent rate of H2 production under visible light (56.2 mmol g−1 h−1) along with simultaneous 87.1 % ofloxacin (OFL) removal. The H2 production rate is manifolds higher than in ultrapure water, sulfadiazine, rhodamine B and higher in hole scavenging triethanolamine. The interfacial intimate coupling with well-matched energy bands, foster the charge separation with effective Z-scheme transfer facilitated by I3−/I− and Bi3+/Bi5+ and redox mediators. The scavenging of majority of holes for direct oxidation or via [rad]OH radical formation leaves photogenerated electrons (at CB of g-C3N4 and Bi4O5I2) free for H2 evolution from H2O. Such work is promising for designing high photo-absorbing heterojunction photocatalysts for dual functionalities of clean energy production and environmental detoxification.

AB - Inspired by waste to energy production, we report construction of dual Z-scheme advanced photocatalyst g-C3N4/Bi4Ti3O12/Bi4O5I2 heterojunction for coupled photocatalytic H2 evolution and degradation of antibiotics with high efficiency. The optimal CTBT-30 i.e (40 %g-C3N4/Bi4Ti3O12)/30 % Bi4O5I2 photocatalyst exhibited an excellent rate of H2 production under visible light (56.2 mmol g−1 h−1) along with simultaneous 87.1 % ofloxacin (OFL) removal. The H2 production rate is manifolds higher than in ultrapure water, sulfadiazine, rhodamine B and higher in hole scavenging triethanolamine. The interfacial intimate coupling with well-matched energy bands, foster the charge separation with effective Z-scheme transfer facilitated by I3−/I− and Bi3+/Bi5+ and redox mediators. The scavenging of majority of holes for direct oxidation or via [rad]OH radical formation leaves photogenerated electrons (at CB of g-C3N4 and Bi4O5I2) free for H2 evolution from H2O. Such work is promising for designing high photo-absorbing heterojunction photocatalysts for dual functionalities of clean energy production and environmental detoxification.

KW - Antibitoic degradation

KW - Charge separation

KW - Dual Z-scheme g-CN/BiTiO/BiOI

KW - Simultaneous H evolution

KW - Visible light photocatalysis

UR - https://www.scopus.com/pages/publications/85098200110

U2 - 10.1016/j.apcatb.2020.119808

DO - 10.1016/j.apcatb.2020.119808

M3 - Article

AN - SCOPUS:85098200110

SN - 0926-3373

VL - 284

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 119808

ER -

Kumar A, Sharma G, Kumari A, Guo C, Naushad M, Vo DVN et al. Construction of dual Z-scheme g-C₃N₄/Bi₄Ti₃O₁₂/Bi₄O₅I₂ heterojunction for visible and solar powered coupled photocatalytic antibiotic degradation and hydrogen production: Boosting via I⁻/I₃⁻ and Bi³⁺/Bi⁵⁺ redox mediators. Applied Catalysis B: Environmental. 2021 May 5;284:119808. doi: 10.1016/j.apcatb.2020.119808