Details
| Original language | English |
|---|---|
| Article number | 129123 |
| Journal | Journal of hazardous materials |
| Volume | 436 |
| Early online date | 11 May 2022 |
| Publication status | Published - 15 Aug 2022 |
| Externally published | Yes |
Abstract
The efficient deployment of visible and near-infrared (NIR) light for photocatalytic disinfection is of great concern a matter. Herein, we report a specific bifunctional 2D/2D g-C 3N 4/BiO 2−x nanosheets heterojunction, prepared through a self-assembly approach. Delightfully, the obtained 2D/2D heterojunctions exhibited satisfactory photocatalytic disinfection performance towards Escherichia coli K-12 (E. coli K-12) under visible light irradiation, which was credited to the Z-scheme interfacial heterojunction facilitating the migration of photogenerated carries. The photoactivity enhancement driven by NIR light illumination was ascribed to the cooperative synergy effect of photothermal effect and “hot electrons”, engineering efficient charge transfer. Intriguingly, the carboxyl groups emerged on g-C 3N 4 nanosheets contributed a vital role in establishing the enhanced photocatalytic reaction. Moreover, the disinfection mechanism was systematically described. The cell membrane was destroyed, evidenced by the generation of lipid peroxidation reaction and loss of energy metabolism. Subsequently, the damage of defense enzymes and release of intracellular constituents announced the irreversible death of E. coli K-12. Interestingly enough, considerable microbial community shifts of surface water were observed after visible and NIR light exposure, highlighting the critical feature of disinfection process in shaping microbial communities. The authors believe that this work gives a fresh light on the feasibility of heterostructures-enabled disinfection processes.
Keywords
- G-C N /BiO heterostructures, Microbial community, Oxygen vacancies, Photocatalytic disinfection, Photothermal effect
ASJC Scopus subject areas
- Environmental Science(all)
- Pollution
- Environmental Science(all)
- Waste Management and Disposal
- Environmental Science(all)
- Health, Toxicology and Mutagenesis
- Environmental Science(all)
- Environmental Engineering
- Environmental Science(all)
- Environmental Chemistry
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In: Journal of hazardous materials, Vol. 436, 129123, 15.08.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Bifunctional 2D/2D g-C3N4/BiO2−x nanosheets heterojunction for bacterial disinfection mechanisms under visible and near-infrared light irradiation
AU - He, Nannan
AU - Guo, Zichang
AU - Yu, Yalin
AU - Tan, Ling
AU - Luo, Haopeng
AU - Li, Lu
AU - Bahnemann, Janina
AU - Chen, Huan
AU - Jiang, Fang
N1 - Publisher Copyright: © 2022 Elsevier B.V.
PY - 2022/8/15
Y1 - 2022/8/15
N2 - The efficient deployment of visible and near-infrared (NIR) light for photocatalytic disinfection is of great concern a matter. Herein, we report a specific bifunctional 2D/2D g-C 3N 4/BiO 2−x nanosheets heterojunction, prepared through a self-assembly approach. Delightfully, the obtained 2D/2D heterojunctions exhibited satisfactory photocatalytic disinfection performance towards Escherichia coli K-12 (E. coli K-12) under visible light irradiation, which was credited to the Z-scheme interfacial heterojunction facilitating the migration of photogenerated carries. The photoactivity enhancement driven by NIR light illumination was ascribed to the cooperative synergy effect of photothermal effect and “hot electrons”, engineering efficient charge transfer. Intriguingly, the carboxyl groups emerged on g-C 3N 4 nanosheets contributed a vital role in establishing the enhanced photocatalytic reaction. Moreover, the disinfection mechanism was systematically described. The cell membrane was destroyed, evidenced by the generation of lipid peroxidation reaction and loss of energy metabolism. Subsequently, the damage of defense enzymes and release of intracellular constituents announced the irreversible death of E. coli K-12. Interestingly enough, considerable microbial community shifts of surface water were observed after visible and NIR light exposure, highlighting the critical feature of disinfection process in shaping microbial communities. The authors believe that this work gives a fresh light on the feasibility of heterostructures-enabled disinfection processes.
AB - The efficient deployment of visible and near-infrared (NIR) light for photocatalytic disinfection is of great concern a matter. Herein, we report a specific bifunctional 2D/2D g-C 3N 4/BiO 2−x nanosheets heterojunction, prepared through a self-assembly approach. Delightfully, the obtained 2D/2D heterojunctions exhibited satisfactory photocatalytic disinfection performance towards Escherichia coli K-12 (E. coli K-12) under visible light irradiation, which was credited to the Z-scheme interfacial heterojunction facilitating the migration of photogenerated carries. The photoactivity enhancement driven by NIR light illumination was ascribed to the cooperative synergy effect of photothermal effect and “hot electrons”, engineering efficient charge transfer. Intriguingly, the carboxyl groups emerged on g-C 3N 4 nanosheets contributed a vital role in establishing the enhanced photocatalytic reaction. Moreover, the disinfection mechanism was systematically described. The cell membrane was destroyed, evidenced by the generation of lipid peroxidation reaction and loss of energy metabolism. Subsequently, the damage of defense enzymes and release of intracellular constituents announced the irreversible death of E. coli K-12. Interestingly enough, considerable microbial community shifts of surface water were observed after visible and NIR light exposure, highlighting the critical feature of disinfection process in shaping microbial communities. The authors believe that this work gives a fresh light on the feasibility of heterostructures-enabled disinfection processes.
KW - G-C N /BiO heterostructures
KW - Microbial community
KW - Oxygen vacancies
KW - Photocatalytic disinfection
KW - Photothermal effect
UR - http://www.scopus.com/inward/record.url?scp=85130385141&partnerID=8YFLogxK
U2 - 10.1016/j.jhazmat.2022.129123
DO - 10.1016/j.jhazmat.2022.129123
M3 - Article
VL - 436
JO - Journal of hazardous materials
JF - Journal of hazardous materials
SN - 0304-3894
M1 - 129123
ER -