亲水改性UiO-66修饰电极的抗污染性能OA
Antifouling Property of Hydrophilic UiO-66 Modified Electrodes
合成了亲水性不同的金属有机框架化合物UiO-66、UiO-66-NH2 和UiO-66-(OH)2,再用滴涂法制备了三种修饰电极UiO-66/GCE、UiO-66-NH2/GCE和UiO-66-(OH)2/GCE,采用差分脉冲伏安法比较了三种电极的抗污能力.结果表明,与传统的UiO-66 相比,UiO-66-NH2 表现出更强的抗蛋白质非特异性吸附能力,峰电流信号的保留程度高达 95%,这归功于UiO-66-NH2 良好的亲水性,有利于在电极表面形成水化层,产生物理及能量势垒,阻止了蛋白质等疏水物质靠近电极表面.UiO-66-NH2 修饰电极还表现出良好的稳定性,经过长时间测试后,电流保留值高达 91%.因此,UiO-66 有望作为一类新的电极抗污材料应用于电化学生物传感器的构建,为复杂环境中物质的准确分析提供了一种新的策略.
The antifouling property of hydrophilic UiO-66(UiO-66,UiO-66-NH2 and UiO-66-(OH)2)modified electrodes was investigated.The peak current obtained from UiO-66-NH2/GCE modified electrode retained up to 95%of the original value in FcMeOH solution.This phenomenon was attributed to the excellent hydrophilicity of UiO-66-NH2 that facilitated the formation of a hydration layer on the electrode surface,which created a physical and energetic barrier that prevented hydrophobic substances,such as proteins,from approaching the electrode surface.In addition,UiO-66-NH2/GCE modified electrode also exhibited long-term stability.Therefore,UiO-66 can be utilized as a new class of antifouling materials.This study also provided an effective strategy for the construction of electrochemical biosensors with good antifouling ability and stability.
刘耘希;赵凡
天津师范大学 化学学院,天津师范大学天津市功能分子结构与性能重点实验室,天津 300387
化学
纳米材料金属有机框架化合物UiO-66电极抗污染电化学生物传感器
nanomaterialmetal-organic frameworkUiO-66antifoulingelectrochemical biosensor
《广州化学》 2024 (004)
55-58 / 4
天津市大学生创新创业训练计划项目(202210065164)
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