基于汞触发类酶活性的CoSe2/MoSe2用于汞离子的比色检测
CoSe2/MoSe2 based on mercury-triggered enzyme activity for colorimetric detection of mercury ions
摘要
通过两步简单的共沉淀法和水热法合成了CoSe2/MoSe2 用于汞离子(Hg2+)的比色传感检测.基于硒(Se)与Hg2+之间特有的生物拮抗作用,当CoSe2/MoSe2 与Hg2+共存时,Hg2+可以触发增强CoSe2/MoSe2 的类过氧化物酶活性,并表现出优异的选择性和灵敏性,使CoSe2/MoSe2将无色3,3',5,5'-四甲基联苯胺(TMB)氧化为蓝色oxTMB.在0～5.0 µmol/L范围内,Hg2+浓度与吸光度呈正比,检测限为54.7 nmol/L.本方法为Hg2+的现场分析提供了一种新的技术.
CoSe2/MoSe2 was synthesized via a straightforward two-step co-precipitation and hydrothermal method for the colorimetric detection of mercury ions(Hg2+).Owing to the unique biological antagonism between selenium and Hg2+,when CoSe2/MoSe2 coexisted with Hg2+,Hg2+was able to trigger the enhancement in the peroxidase-like activity of CoSe2/MoSe2,which exhibited excellent selectivity and sensitivity,enabling CoSe2/MoSe2 to efficiently oxidize colouless 3,3',5,5'-tetramethylbenzidine(TMB)to blue oxTMB.The concentration of Hg2+was proportional to the absorbance within the concentration range of 0-5.0 µmol/L,and the limit of detection was 54.7 nmol/L.The method offered a novel technique for in situ Hg2+analysis.
年，卷(期)：
2026, 45(7)
分类号：
O657.32
X832
机标分类号：
O657.3
TB383
TP212.3
在线出版日期：
2026年7月30日
基金项目：
22004132:国家自然科学基金，
