Optimized photocatalytic performance of ZnS-SnO2 heterostructures for visible light driven mineralization of Acid violet 7 dye and inactivation of bacteria
- Authors
- Ghugal,Sachin G.; Vidyasagar,Devthade; Tadi, Kiran Kumar; Geethukrishnan; Umare ,Suresh S.; Jeong , YuHyeong; Yoon, Jonghun
- Issue Date
- Oct-2023
- Publisher
- Pergamon Press
- Keywords
- Acid violet 7; Antibacterial activity.; Mineralization; Photocatalysts; ZnS-SnO2 heterostructure
- Citation
- Materials Science in Semiconductor Processing, v.165, pp.1 - 11
- Indexed
- SCIE
SCOPUS
- Journal Title
- Materials Science in Semiconductor Processing
- Volume
- 165
- Start Page
- 1
- End Page
- 11
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/187416
- DOI
- 10.1016/j.mssp.2023.107657
- ISSN
- 1369-8001
- Abstract
- The present study aims to decipher the defect-induced photocatalytic activity of ZnS-SnO2 heterostructure for visible light-assisted oxidative mineralization of Acid Violet 7 dye (AV7) and Escherichia coli (E. coli) bacterial disinfection. The prepared ZnS-SnO2 (60ZS) heterostructure/nanocomposite catalysts show improved optical and visible light absorption properties. Photoluminescence findings reveal the existence of defect energy levels/surface states associated with 60ZS heterostructure catalysts. Photo/Electrochemical studies show improved photocurrent response, high capacitance, lower charge transfer resistance, and improved charge-discharge behaviour in 60ZS heterostructure catalysts compared to individual components. The improved photocatalytic performance of 60ZS heterostructure is ascribed to the interactive effect of a reduction in the band gap, improved surface area, and enhanced lifetime of photogenerated charge carriers. The major reactive species that cause the degradation reaction have been identified, and a plausible AV7 dye degradation pathway has been proposed. The 60ZS heterostructure catalyst exhibits good stability and a recycled nature.
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