Mutalik, Chinmaya and Krisnawati, Dyah Ika and Patil, Shivaraj B. and Khafid, Muhammad and Atmojo, Didik Susetiyanto and Santoso, Puguh and Lu, Ssu-Chiao and Wang, Di-Yan and Kuo, Tsung-Rong (2021) Phase-Dependent MoS2 Nanoflowers for Light-Driven Antibacterial Application. ACS Sustainable Chemistry & Engineering, 9 (23). pp. 7904-7912. ISSN 2168-0485
|
PDF
Phase-Dependent MoS2 Nanoflowers for Light-Driven Antibacterial Application.pdf Download (4MB) | Preview |
|
|
PDF
peer review muhamad khafid.pdf Download (970kB) | Preview |
|
|
PDF
turnitin muhamad khafid.pdf Download (4MB) | Preview |
Abstract
The metallic phase of 1T-MoS2 nanoflowers (NFs) and the semiconducting phase of 2H-MoS2 NFs were prepared by a facile solvothermal and combustion method. The antibacterial activities, reactive oxygen species (ROS) generation, and light-driven antibacterial mechanism of metallic 1T-MoS2 NFs and semiconducting 2H-MoS2 NFs were demonstrated with the bacterium Escherichia coli (E. coli) under light irradiation. Results of the bacterial growth curve and ROS generation analyses revealed higher light-driven antibacterial activity of metallic 1T-MoS2 NFs compared to semiconducting 2H-MoS2 NFs. Electron paramagnetic resonance (EPR) spectroscopy demonstrated that the ROS of the superoxide anion radical •O2– was generated due to the incubation of 1T-MoS2 NFs and E. coli with light irradiation. Furthermore, E. coli incubated with metallic 1T-MoS2 NFs exhibited significant damage to the bacterial cell walls, complete bacterial destruction, and abnormal elongation after light irradiation. The light-driven antibacterial mechanism of metallic 1T-MoS2 NFs was examined, and we found that, under light irradiation, photoinduced electrons were generated by metallic 1T-MoS2 NFs, and then the photoinduced electrons reacted with oxygen to generate superoxide anion radical which induced bacterial death. For semiconducting 2H-MoS2 NFs, photoinduced electrons and holes rapidly recombined resulting in a decrease in ROS generation which diminished the light-driven antibacterial activity.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Metallic 1T-MoS2 Semiconducting 2H-MoS2 Photoactivity Reactive oxygen species Superoxide anion radical |
| Subjects: | R Medicine > R Medicine (General) |
| Divisions: | Faculty of Nursing and Midwifery > Program Study of Nursing Bachelor |
| Depositing User: | Mr. . Aji |
| Date Deposited: | 24 Oct 2022 02:45 |
| Last Modified: | 24 Oct 2022 02:45 |
| URI: | http://repository.unusa.ac.id/id/eprint/8957 |
Actions (login required)
 |
View Item |
