Abstract
Raw peach gum is hard crystalline-like solid with very poor solubility, significantly restricting its application in various fields. This study optimized the parameters for ultrasonic-assisted peach gum polysaccharides (UPGP) extraction. The results showed that the maximum extraction rate was up to 80.1% under the optimized conditions of 5 h extraction time, 90 mL/g water to raw peach gum ratio and 532 W ultrasonic intensity at 95 °C. The acquired UPGP mainly consisted of Ara, Gal and Man with a molecular weight of 8.18×106 g/mol. Moreover, the UPGP has been used as a green precursor for carbon dots (CDs) preparation through a simple one-step hydrothermal reaction. The synthesized CDs had a mean particle diameter of 7.66 nm and showed excellent fluorescence intensity and stability. Thus, this study improved the utilization of raw peach gum and further broadened the UPGP application.
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