<br>基于双巯基官能团修饰的玉米秸秆的荧光纤维素水凝胶用于 Hg（II）的去除和检测,International Journal of Biological Macromolecules

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基于双巯基官能团修饰的玉米秸秆的荧光纤维素水凝胶用于 Hg（II）的去除和检测
International Journal of Biological Macromolecules ( IF 7.7 ) Pub Date : 2024-10-09 , DOI: 10.1016/j.ijbiomac.2024.136427
Boyun Wang ₁ , Wanqi Zhang ₂ , Yuan Zhong ₂ , Yuan Guo ₁ , Ximing Wang ₃ , Xiaotao Zhang ₄

Affiliation

汞离子是自然界中最危险的重金属之一，对环境和人类健康构成严重风险。来自玉米秸秆的蓝色硫掺杂碳点（SCD）被用作材料。将 SCDs 掺入硫改性的羧化水凝胶中，成功制备了用于同时荧光检测和 Hg（II）吸附的复合凝胶（SCDs-KTOCS gel）。这使得能够有效地识别和去除受污染水中 Hg（II）。分析了 SCDs-KTOCS-凝胶的化学含量、荧光性质和吸附行为。结果表明，SCDs-KTOCS-凝胶表现出有效的Hg（II）吸附（193 mg/g）和Hg（II）荧光发射的广泛线性光谱（150-500 mg/L;检测限 = 1.5668 mg/L）。吸附值与 Temkin 模型和准二级动力学非常吻合。此外，还检查了 SCD-KTOCS-凝胶中的 Hg（II）检测和吸附。通过将现有探针更换为适合各种相关应用的探针，本研究提出了一种环保且可持续的方法来生产用于去除和检测 Hg（II）的材料，并构建用于检测和吸附不同金属的荧光水凝胶。

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Fluorescent cellulose hydrogels based on corn stalk of double sulfhydryl functional group modification for Hg(II) removal and detection

Ions of mercury, one of the most hazardous heavy metals in nature, pose serious risks to the environment and human health. Blue sulfur-doped carbon dots (SCDs) from corn stalks were utilized as material. The SCDs were incorporated into a carboxylated hydrogel modified with sulfur, and a compound gel (SCDs–KTOCS gel) was successfully fabricated for simultaneous fluorescence detection and Hg(II) adsorption. This enabled the effective identification and removal of Hg(II) from contaminated water. The chemical content, fluorescence properties, and adsorption behaviors of the SCDs–KTOCS–gels were analyzed. The results demonstrate that the SCDs–KTOCS–gels exhibited effective Hg(II) adsorption (193 mg/g) and an extensive linear spectrum for Hg(II) fluorescence emission (150–500 mg/L; detection limit = 1.5668 mg/L). The adsorption values fit well with the Temkin models and pseudo-second-order kinetics. Additionally, Hg(II) detection and adsorption in the SCDs–KTOCS–gels were examined. By exchanging the existing probe for a suitable one that fits various relevant applications, this study suggests an environmentally friendly and sustainable method of producing materials for removing and detecting Hg(II) and constructing a fluorescence hydrogel for the detection and adsorption of different metals.

更新日期：2024-10-09

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