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Montmorillonite nanosheets with enhanced photodynamic performance for synergistic bacterial ablation
- Source :
- Journal of Materials Chemistry B. 9:404-409
- Publication Year :
- 2021
- Publisher :
- Royal Society of Chemistry (RSC), 2021.
-
Abstract
- Montmorillonite (MMT), as a naturally sourced and FDA-approved biomaterial, has attracted considerable attention due to its extensive application in biomedical areas, such as intestinal ailments, drug delivery, and additive manufacturing. In this work, two-dimensional montmorillonite (2D-MMT) ultrathin nanosheets were successfully prepared from sodium montmorillonite (Na-MMT) by utilizing a freeze-drying assisted method. Possessing a large specific surface area and increased number of exposed hydroxyl groups, 2D-MMT nanosheets exhibited better antibacterial ability than the original Na-MMT. More strikingly, we found that both 2D-MMT nanosheets and Na-MMT could generate reactive oxygen species (ROS) upon visible light illumination, which could promote their antibacterial efficiency. As a result, 2D-MMT nanosheets showed efficient antibacterial performance in the presence of light towards Escherichia coli with a simultaneous enhancement of surface adsorption and photodynamic ablation. What's more, a possible mechanism for ROS generation by MMT upon light illumination was first proposed in this work. The combination of the increased physical adsorption capacity and ROS generation ability of 2D-MMT nanosheets would help inspire the development of MMT as a promising antimicrobial candidate in the future.
- Subjects :
- Biomedical Engineering
02 engineering and technology
010402 general chemistry
01 natural sciences
chemistry.chemical_compound
Adsorption
Specific surface area
mental disorders
Humans
Nanotechnology
General Materials Science
chemistry.chemical_classification
Reactive oxygen species
Biomaterial
General Chemistry
General Medicine
021001 nanoscience & nanotechnology
Anti-Bacterial Agents
0104 chemical sciences
Montmorillonite
Photochemotherapy
chemistry
Chemical engineering
Drug delivery
Bentonite
Reactive Oxygen Species
0210 nano-technology
Visible spectrum
Subjects
Details
- ISSN :
- 20507518 and 2050750X
- Volume :
- 9
- Database :
- OpenAIRE
- Journal :
- Journal of Materials Chemistry B
- Accession number :
- edsair.doi.dedup.....211e0eac3fd939528768a7d76fcc8af8