碳量子点水凝胶的制备及其对盐酸四环素的吸附性能研究
Preparation of Carbon Quantum Dots Hydrogels and Its Adsorption Performance of Tetracycline Hydrochloride
DOI: 10.12677/ms.2026.162019, PDF,   
作者: 张迎会, 蔡家美：兰州交通大学化学化工学院，甘肃 兰州
关键词: 碳量子点；水凝胶；盐酸四环素；吸附；Carbon Quantum Dots； Hydrogels； Tetracycline Hydrochloride； Adsorption
摘要: 本研究以柠檬酸为原料，采用油浴熔融法合成了荧光碳量子点(CDs)，并将其均匀分散于淀粉/聚乙烯醇(PVA)复合体系中，碱化交联制备了碳量子点水凝胶(CDs/Gel)。系统研究了CDs/Gel对盐酸四环素(TCH)的吸附性能，并通过TEM、SEM、FT-IR、XPS和Zeta电位等手段对材料形貌及官能团进行表征。实验表明：在pH 5~9、50℃、初始浓度150 mg/L、吸附时间720 min条件下，CDs/Gel对TCH的吸附容量为63.254 mg/g，吸附过程符合准二级动力学模型和Langmuir等温模型，热力学曲线拟合说明吸附过程是吸热过程。此外，CDs/Gel在5次吸附–解吸循环后仍保持28.551 mg/g的吸附容量。为碳量子点水凝胶复合材料的开发以及综合应用提供科学依据与研究思路。
Abstract: In this study, citric acid was utilized as the precursor to synthesize fluorescent carbon quantum dots (CDs) via an oil bath melt method. These CDs were uniformly dispersed within a starch/polyvinyl alcohol (PVA) composite system, and a carbon quantum dot hydrogels (CDs/Gel) was fabricated through alkaline crosslinking. The adsorption performance of CDs/Gel towards tetracycline hydrochloride (TCH) was systematically investigated, and the morphology and functional groups of the materials were characterized by TEM, SEM, FT-IR, XPS and Zeta potential. Experimental results indicated that under conditions of pH 5~9, 50˚C, initial concentration of 150 mg/L and adsorption time of 720 minutes, the adsorption capacity of CDs/Gel for TCH reached 63.254 mg/g. The adsorption process conformed to the pseudo-second-order kinetic model and the Langmuir isotherm model, while thermodynamic curve fitting suggested that the adsorption process was endothermic. Additionally, after 5 adsorption-desorption cycles, the CDs/Gel still maintained an adsorption capacity of 28.551 mg/g. This research provides a scientific basis and research direction for the development and comprehensive application of carbon quantum dot hydrogel composites.
文章引用：张迎会, 蔡家美. 碳量子点水凝胶的制备及其对盐酸四环素的吸附性能研究[J]. 材料科学, 2026, 16(2): 24-36. https://doi.org/10.12677/ms.2026.162019

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