化学
电化学
价(化学)
纳米技术
物理化学
电极
有机化学
材料科学
作者
Shan Jin,Jianxiang Pang,Fanpeng Ma,Yikun Cheng,Yunfei Shen,Zhenpeng Xiao,Long Chen
出处
期刊:Talanta
[Elsevier]
日期:2024-06-01
卷期号:273: 125848-125848
标识
DOI:10.1016/j.talanta.2024.125848
摘要
Prussian blue analogues, as prospective electrode materials, play a crucial role in detecting heavy metal ions (HMIs), a process closely related to their electron transfer capacities and active surfaces. Here, etched copper-iron Prussian blue analogues (CuFe-PBA) are synthesized through a combination of flash nanoprecipitation (FNP) and an alkali etching process. Furthermore, this study investigates the impact of ammonia on the electronic structure of CuFe-PBA and its electrochemical detection capabilities for HMIs. The etched CuFe-PBA (e-CuFe-PBA) exhibits excellent detection performance for Cd2+, Pb2+ and Hg2+ with 17.6 μA μM−1, 24.2 μA μM−1 and 26.2 μA μM−1, respectively, due to the fact that the ammonia etching not only modulates the electronic properties of the surface of CuFe-PBA but also reduces the degree of agglomeration and enhances the accessible surface area. Additionally, it demonstrates excellent stability and resistance to interference, having been successfully applied to detect HMIs in food samples such as preserved eggs and apple juice. These results provide a new strategy for the use of Prussian blue analogues as electrochemical sensors for food safety applications.
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