Biomimetic Electrochemical Sensor Based on Single-Atom Nickel Laccase Nanoenzyme for Quercetin Detection
作者:Yangguang Li、Yuxin Dong、Rongjiang Wang、Zhenghao Lin、Jiajun Lin、Xinyi Ji、Bang-Ce Ye
DOI:10.1021/acs.analchem.3c05161
日期:2024.2.13
sensitive electrochemical biosensor was constructed by leveraging the laccase-like activity of N/Ni SAE; this sensor offered unique advantages in terms of catalytic activity, selectivity, stability, and repeatability. Its detection ranges for quercetin were 0.01–0.1 and 1.0–100 μM, and the detection limit was 3.4 nM. It was also successfully used for the quantitative detection of quercetin in fruit
漆酶是铜氧化酶家族的一员,已被用作环境和生化工业中的绿色催化剂。然而,漆酶纳米酶仅限于以铜为活性位点的材料,非铜漆酶纳米酶鲜有报道。本研究受天然漆酶的多个铜活性位点和氧化还原Cu 2+ /Cu +电子传递途径的启发,制备了一种具有高漆酶活性的新型氮/镍单原子纳米酶(N/Ni SAE)通过可控的水/乙醇界面反应诱导镍和多巴胺沉淀。与漆酶相比,N/Ni SAE模拟的漆酶活性表现出优异的稳定性和可重复使用性。 N/Ni SAE 对 2,4-二氯苯酚、氢醌、双酚 A 和对氨基苯的降解表现出更高的效率。此外,利用N/Ni SAE的漆酶样活性构建了灵敏的电化学生物传感器;该传感器在催化活性、选择性、稳定性和重复性方面具有独特的优势。槲皮素的检测范围为0.01-0.1和1.0-100 μM,检测限为3.4 nM。它还成功用于果汁中槲皮素的定量检测。因此,本研究制备的单原子仿生纳米酶促进了检测各种生物活性