PDF(Pubmed)
Abstract：
Water pollution, significantly influenced by the discharge of synthetic dyes from industries, such as textiles, poses a persistent global threat to human health. Among these dyes, methylene blue, particularly prevalent in the textile sector, exacerbates this issue. This study introduces an innovative approach to mitigate water pollution through the synthesis of nanomaterials using biomass-derived carbon quantum dots (CQDs) from grape pomace and watermelon peel. Utilizing the hydrothermal method at temperatures between 80 and 160 °C over periods ranging from 1 to 24 h, CQDs were successfully synthesized. A comprehensive characterization of the CQDs was performed using UV-visible spectroscopy, Fourier-transform infrared spectroscopy, dynamic light scattering, Raman spectroscopy, and luminescence spectroscopy, confirming their high quality. The photocatalytic activity of the CQDs in degrading methylene blue was evaluated under both sunlight and incandescent light irradiation, with measurements taken at 20 min intervals over a 2 h period. The CQDs, with sizes ranging from 1-10 nm, demonstrated notable optical properties, including upconversion and down-conversion luminescence. The results revealed effective photocatalytic degradation of methylene blue under sunlight, highlighting the potential for scalable production of these cost-effective catalytic nanomaterials for synthetic dye degradation.
摘要：
水污染,受工业合成染料排放的显著影响，比如纺织品，对人类健康构成持续的全球威胁。在这些染料中，亚甲蓝,在纺织行业尤其普遍，加剧了这个问题。这项研究介绍了一种创新的方法，通过使用来自葡萄果渣和西瓜皮的生物质衍生碳量子点（CQDs）合成纳米材料来减轻水污染。在80至160°C的温度下使用水热法，时间为1至24小时，成功合成了CQDs。使用紫外可见光谱对CQDs进行了全面表征，傅里叶变换红外光谱,动态光散射,拉曼光谱,和发光光谱，确认其高品质。在阳光和白炽灯照射下，评估了CQDs降解亚甲基蓝的光催化活性，在2小时内以20分钟的间隔进行测量。CQDs,尺寸范围为1-10nm，表现出显著的光学性能，包括上转换和下转换发光。结果表明，在阳光下有效地光催化降解亚甲基蓝，强调了这些成本有效的催化纳米材料用于合成染料降解的可扩展生产的潜力。
