Preparation, Characterization and Antimicrobial Activity of Carbon Dots from Pilei of Dictyophora echinovolvata

  Objective  Utilization of mushroom biomass waste to prepare carbon dots (CDs) for the prevention and control of diseases on plants was studied.

  Method  CDs were obtained by hydrothermal oxidation of pilei of Dictyophora echinovolvata and characterized by the transmission electron microscopy (TEM), Fourier transform infrared spectrophoto-metry (FT-IR), x-ray diffraction (XRD), and fluorescene spectrophotometry. Antibacterial properties of the CDs were determined by measurements of diameter of the bacteriostatic circle on Ralstonia solanacearum and Xanthomonas axonopodis.

  Result  The CDs obtained displayed an appropriate spherical morphology and uniform size with good dispersion. They emitted bright blue photoluminescence under UV excitation, exhibited an excitation-dependent PL behavior, and demonstrated excellent antibacterial activities against R. solanacearum and X. axonopodis.

  Conclusion  The CDs with a potential of preventing and controlling plant diseases by bacterial infection were successful prepared in laboratory.