检出限
选择性
化学
电子转移
价(化学)
比色法
核化学
线性范围
离子
分析化学(期刊)
催化作用
色谱法
光化学
生物化学
有机化学
作者
Denghao Wang,Changbao Gong,Huimin Zhao
标识
DOI:10.1016/j.microc.2022.107706
摘要
In this study, a highly sensitive colorimetric sensor was established for the detection of Cr (VI) in water using Au [email protected]@MnO2 based on signal amplification. Au [email protected]@MnO2 exhibited excellent nano-enzyme activity and catalyzed the oxidation of TMB during detection of Cr (VI) in the linear range of 0.80 to 160.26 nM at limit of detection of 0.73 nM (S/N = 3). The valence states of Au and Mn change before and after the reaction, as a result Au [email protected]@MnO2 promotes the electron transfer between Cr (VI) and TMB. The colorimetric sensor of Cr (VI) based on Au [email protected]@MnO2 also exhibits excellent selectivity for interference ions. Moreover, the developed assay has been successfully applied to detect Cr (VI) in real samples. This study demonstrated that Au [email protected]@MnO2 is simply designed, high sensitivity and selectivity in colorimetric detection of Cr (VI), which could be useful for the field detection of Cr (VI).
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