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 -