Abstract Water pollution, especially that of heavy metal ions, has always been one of the most important kinds of pollution and has long plagued human production and life. Therefore, how to effectively control pollution of heavy metals in water is an urgent problem for scientists. We have prepared a new carbon quantum dots (CQDs)/nanofibrillated cellulose (NFC) composite aerogel using green chemical synthesis and used it for the adsorption and detection of heavy metal ions (Cr3+) in water. At different pH values, the prepared materials adsorb heavy metal ions (Cr3+) in water, and the fluorescence effect of the CQDs in the material decreases with an increase in the amount of heavy metal ions (Cr3+) that are adsorbed. This indicates that the material can be used for real-time monitoring of adsorption behavior. Our research results provide underlying ideas for guiding control of water pollution and extending the applications of aerogels and CQDs.

中文翻译：

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用于监测水中重金属离子吸附的发光碳量子点/纳米原纤化纤维素复合气凝胶

摘要 水污染，尤其是重金属离子污染，一直是最重要的污染类型之一，长期困扰着人类的生产和生活。因此，如何有效控制水中重金属的污染是科学家们亟待解决的问题。我们利用绿色化学合成制备了一种新型碳量子点（CQDs）/纳米原纤化纤维素（NFC）复合气凝胶，并将其用于水中重金属离子（Cr3+）的吸附和检测。在不同pH值下，制备的材料吸附水中的重金属离子(Cr3+)，材料中CQDs的荧光效应随着吸附的重金属离子(Cr3+)量的增加而降低。这表明该材料可用于实时监测吸附行为。