碘化物
检出限
双金属片
化学
辣根过氧化物酶
催化作用
吸附
电子转移
碘
无机化学
核化学
化学工程
光化学
色谱法
物理化学
有机化学
酶
工程类
作者
Xuebing Zhao,Jiali Liu,Fa-Ting Xie,Tong Yang,Rong Hu,Yunhui Yang
标识
DOI:10.1016/j.saa.2021.120117
摘要
In this paper, a simple, rapid, and low-cost colorimetric method was designed based on Co/Fe-MOFs-iodide composite for the quantitative detection of H2S. It is know that iodide can improve the catalytic activity of bimetallic porous material Co/Fe-MOFs via adsorption into the framework of MOFs. Herein, we demonstrate a novel strategy to enhance the peroxidase-like activity of MOFs. Compared to horseradish peroxidase (HRP), the kinetic measurement results show that Co/Fe-MOFs-iodide exhibits excellent affinity to substrates, promoting electron transfer. Due to the synergetic effect of Co/Fe-MOFs and iodide, and rapid electron transfer process, Co/Fe-MOFs-iodide demonstrates improved peroxidase-like activity. As a proof-of-concept application, a novel, highly sensitive H2S colorimetric method is established with a detection limit (LOD) of 0.33 nM. In the absence of iodide, LOD is approx. 200-fold higher than that of the amplified colorimetric assay. The proposed method can also accurately detect traces of H2S in serum samples.
科研通智能强力驱动
Strongly Powered by AbleSci AI