Tea residue is a representative biomass waste with a high annual output.Carbon dots(CDs)with antibacterial activity were developed from oolong tea waste to better develop high-value applications of tea residue.The pre...Tea residue is a representative biomass waste with a high annual output.Carbon dots(CDs)with antibacterial activity were developed from oolong tea waste to better develop high-value applications of tea residue.The prepared CDs possessed a graphite lattice structure and a negative charge(-17.4 mV).The CDs exhibited excellent antibacterial activity against both Gram-positive and Gram-negative bacteria,especially being highly effective against to Staphylococcus aureus,with a minimum inhibitory concentration of 0.125 mg/mL.The pro-posed antibacterial mechanism of CDs against S.aureus includes disrupting the bacterial cell membrane,leading to the leakage of contents and inducing oxidative stress.Additionally,CDs exhibited low resistance and cyto-toxicity in drug resistance experiments and in vitro cytotoxicity tests.This study emphasizes the potential of developing antimicrobial materials from tea residue,thereby expanding the utilization pathways of biomass waste.展开更多
基金financially supported by Natural Science Foundation of Fujian Province of China(2023J01775)Fujian Provincial Oceanic and Fisheries Bureau,China(FJHYF-L-2023-17).
文摘Tea residue is a representative biomass waste with a high annual output.Carbon dots(CDs)with antibacterial activity were developed from oolong tea waste to better develop high-value applications of tea residue.The prepared CDs possessed a graphite lattice structure and a negative charge(-17.4 mV).The CDs exhibited excellent antibacterial activity against both Gram-positive and Gram-negative bacteria,especially being highly effective against to Staphylococcus aureus,with a minimum inhibitory concentration of 0.125 mg/mL.The pro-posed antibacterial mechanism of CDs against S.aureus includes disrupting the bacterial cell membrane,leading to the leakage of contents and inducing oxidative stress.Additionally,CDs exhibited low resistance and cyto-toxicity in drug resistance experiments and in vitro cytotoxicity tests.This study emphasizes the potential of developing antimicrobial materials from tea residue,thereby expanding the utilization pathways of biomass waste.
