Cellulose and its Derivatives: Properties and Applications

Delucis, Rafael de Ávila; Cademartori, Pedro Henrique González de; Fajardo, André R.; Amico, Sandro Campos

doi:10.1002/9781119711414.ch11

Cited by 6 publications

(1 citation statement)

References 203 publications

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“…Cellulose and its derivatives have numerous applications in the paper, textile, biomaterial, and pharmaceutical industries. , They are presently at the stage of exploration as a low-cost available renewable carbonaceous material to synthesize carbon-based nanomaterials, especially carbon dots (CD) . CD possess an advantage concerning their ease of surface functionalization, water solubility, biocompatibility, etc. − The applications of CD are flourishing in numerous fields, such as bio-imaging, antifouling membranes, photodegradation, photoreduction, energy conversion, sensing, etc.…”

Section: Introductionmentioning

confidence: 99%

Cellulose-Derived Carbon Dots for Inner Filter Effect-Based Selective Sensing of Ofloxacin Antibiotics

Aggarwal

Garg

Kumar

et al. 2023

ACS Appl. Nano Mater.

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A two-step viable synthetic approach for quick and energy-efficient acid-based charring is described here to fabricate self-passivated fluorescent water-soluble CD (wsCD) from sustainable microcrystalline cellulose (MCC) materials. The aqueous solution of wsCD exhibits blue emission under UV-light illumination and shows a fluorescence quantum yield of ∼6%. The wsCD are used here for the selective sensing of ofloxacin (OFLX) from among the four tested antibiotics of the fluoroquinolone class, namely, ciprofloxacin (CPLX), ofloxacin (OFLX), levofloxacin (LVLX), and moxifloxacin (MXLX) based on the simpler fluorescence quenching experiment with a detection limit of ∼0.025 ppm. The plausible mechanism for the selective sensing of OFLX has been proposed based on a detailed analysis of absorbance and time-resolved photoluminescence spectroscopy which indicates the involvement of the inner-filter effect (IFE). Antimicrobial studies of wsCD were conducted on two bacterial strains (Escherichia coli and Staphylococcus aureus) and two fungal strains (Aspergillus niger and Penicillium chrysogenum), where wsCD did not show any toxic effects up to the concentration of 1 mg/mL, hence supporting their biocompatible behavior. Further, an antibiosis study involving the combination of the antibiotic and antifungal agents with wsCD against the growth of the same bacterial and fungal strains was conducted, where wsCD showed mild antifungal activity.

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