Potential of novel dual Z-scheme carbon quantum dots decorated MnIn 2 S 4 /CdS/Bi 2 S 3 heterojunction for environmental applications.

Autor: Sharma S; School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India.; Department of Chemistry, School of Computer Science and Engineering, Lovely Professional University, Phagwara, Punjab, 144411, India., Sonu; School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India., Sudhaik A; School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India., Khan AAP; Center of Excellence for Advanced Materials Research and Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah, 21589, Saudi Arabia. draapk@gmail.com., Saini AK; Department of Biotechnology, MMEC and Central Research Cell, Maharishi Markandeshwar (Deemed to Be University), Mullana, Ambala, HR, 133207, India., Mittal D; Department of Biotechnology, MMEC and Central Research Cell, Maharishi Markandeshwar (Deemed to Be University), Mullana, Ambala, HR, 133207, India., Nguyen VH; Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education (CARE), Kanchipuram District, Kelambakkam, 603103, Tamil Nadu, India., Van Le Q; Department of Materials Science and Engineering, Korea University, 145, Anamro Seongbuk-Gu, Seoul, 02841, South Korea., Ahamad T; Department of Chemistry, College of Science, King Saud University, Riyadh, Saudi Arabia., Raizada P; School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India., Singh P; School of Advanced Chemical Sciences, Shoolini University, Solan, Himachal Pradesh, 173229, India.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2023 Jul; Vol. 30 (31), pp. 77622-77641. Date of Electronic Publication: 2023 Jun 01.
DOI: 10.1007/s11356-023-27591-0
Abstrakt: In this work, CQDs decorated MnIn 2 S 4 /CdS/Bi 2 S 3 heterojunction was prepared successfully by hydrothermal technique for photocatalytic disinfection of Escherichia coli (E. coli) and mineralization of methyl orange (MO) dye. The charge transferal route and mineralization process in CQDs-MnIn 2 S 4 /CdS/Bi 2 S 3 heterojunction were comprehensively investigated by advanced spectroscopic techniques. The improved visible-light activity and enhanced photo-generated charge transferal efficacy caused dual Z-scheme CQDs-MnIn 2 S 4 /CdS/Bi 2 S 3 heterojunction to achieve boosted photodegradation ability. The catalytic degradation trend was followed as CQDs-MnIn 2 S 4 /CdS/Bi 2 S 3  > MnIn 2 S 4  > CdS > Bi 2 S 3 . The dye was mineralized within 180 min under visible light irradiation. The effect of reaction parameters, pH effect, catalyst dosage, and H 2 O 2 addition on MO degradation was also investigated. The degradation rate was maximal at pH 4 with a pseudo-first-order rate constant, 0.0438 min -1 . The assessment of antibacterial properties revealed that CQDs-MnIn 2 S 4 /CdS/Bi 2 S 3 composite effectively inactivated E. coli under visible light. Scavenging experiments, transient photocurrent response, and electron spin resonance spectroscopy suggested that • [Formula: see text] and holes were the dominant reactive species. The Z-scheme heterojunction is recyclable up to ten photocatalytic cycles according to recycling experiments. This research indicates the importance of dual Z-scheme CQDs decorated MnIn 2 S 4 /CdS/Bi 2 S 3 heterojunction in wastewater remediation.
(© 2023. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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