Journal
ACS APPLIED BIO MATERIALS
Volume 4, Issue 5, Pages 4215-4223Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsabm.1c00008
Keywords
mxene; V2C nanosheets; photothermal effect; antibacteria; resistance
Funding
- Excellent Young Scientists Fund [22022407]
- National Natural Science Foundation of China [21874008, 22004006]
- Major Program of National Natural Science Foundation of China [21890740, 21890742]
- Special Foundation for State Major Research Program of China [2019YFC1606603]
- SZU Top Ranking Project [860000002100165, 86000000210]
- Beijing Municipa Science and Technology Commission [z131102002813058]
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This study demonstrates the production of V2C nanosheets using a green process, showing their antimicrobial properties with strong near-infrared absorption and high photothermal conversion efficiency. V2C nanosheets effectively killed both Gram-positive S. aureus and Gram-negative E. coli, making them a promising tool for bacterial treatment and gaining attention in the sterilization industry.
Antibiotic-resistant bacterial strains have been continuously increasing and becoming a supreme threat to public health globally. The nanoparticle-based photothermal treatment has emerged as a powerful tool to combat toxic bacteria. Photothermal agents (PTAs) with cost-effective and high photothermal conversion efficiency are highly desirable. Herein, we unite the green process for delamination of V2AlC to produce a high yield mass of two-dimensional (2D) V2C nanosheets (NSs) by using algae extracts and demonstrate their high antibacterial efficiency. The resultant V2C NSs present decent structural reliability and intrinsic antibacterial ability. Powerful near-infrared (NIR) absorption and extraordinary photothermal conversion proficiency make it a good PTA for the photothermal treatment of bacteria. The antibacterial efficiency evaluation indicated that V2C NSs could effectively kill both Gram-positive S. aureus and Gram-negative E. coli. About 99.5% of both types of bacteria could be killed with low-dose of V2C NSs suspension (40 mu g/mL) with 5 min NIR irradiation due to the intrinsic antibacterial ability and photothermal effect of V2C NSs, which is much higher than previous reports on Ta4C3, Ti3C2, MoSe2, and Nb2C. This work expands the application of MXene V2C NSs for rapid bacteria-killing and would gain promising attention for applications in the sterilization industry.
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