Microwave-assisted green synthesis of monodispersed carbon micro-spheres and their antibacterial activity

Tipo de material: Texto

TextoSeries Applied Surface Science, 642, p.158579, 2024Trabajos contenidos:

Abdulwali, N
van der Zalm, J
Thiruppathi, A. R
Khaleel, A
Chen, A

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Resumen: Well-dispersed mono-carbon microspheres were synthesized via the hydrothermal carbonization of ascorbic acid (AA) using a microwave reactor without adding any catalyst. The synthesized materials were characterized by various microscopic and spectroscopic techniques (e.g., SEM, TEM, XRD, Raman, XPS, EDX, and FTIR spec troscopy), showing that the formed carbon spheres (CSs) exhibited uniform morphology and surface structure with abundant oxygen functional groups. The dimension of the formed CSs could be easily tuned by altering the AA concentration, reaction time, and temperature. A mechanism for the formation of the CSs was proposed, and their antibacterial activities were also investigated against two bacterial strains, showing the inhibition rate of 94 percent for E. coli and 100 percent for S. aureus. This biocidal activity was achieved with the pure CSs produced from the inexpensive AA (Vitamin C) via a rapid green process without any further surface modification or doping, thus promising for myriad surface coating, medical and environmental applications.

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Artículo

Well-dispersed mono-carbon microspheres were synthesized via the hydrothermal carbonization of ascorbic acid (AA) using a microwave reactor without adding any catalyst. The synthesized materials were characterized by various microscopic and spectroscopic techniques (e.g., SEM, TEM, XRD, Raman, XPS, EDX, and FTIR spec troscopy), showing that the formed carbon spheres (CSs) exhibited uniform morphology and surface structure with abundant oxygen functional groups. The dimension of the formed CSs could be easily tuned by altering the AA concentration, reaction time, and temperature. A mechanism for the formation of the CSs was proposed, and their antibacterial activities were also investigated against two bacterial strains, showing the inhibition rate of 94 percent for E. coli and 100 percent for S. aureus. This biocidal activity was achieved with the pure CSs produced from the inexpensive AA (Vitamin C) via a rapid green process without any further surface modification or doping, thus promising for myriad surface coating, medical and environmental applications.

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