化学
西马嗪
过渡金属
催化作用
检出限
锗
钯
兴奋剂
基质(水族馆)
金属
无机化学
氧化物
选择性
纳米技术
组合化学
杀虫剂
色谱法
硅
光电子学
有机化学
材料科学
地质学
物理
海洋学
生物
阿特拉津
农学
作者
Zhao-Yi Zeng,Xujun Wang,Tianhui Yang,Yuanyuan Li,Xiaofeng Liu,Peng Zhang,Bo Feng,Taiping Qing
标识
DOI:10.1016/j.aca.2023.340861
摘要
Designing highly active nanozymes for bioanalysis and environmental sensing remains a challenge. In this study, transition metal, palladium (Pd) and iron (Fe), doped germanium oxide (GeO2) nanozyme was designed and optimized. Compared with the pristine GeO2 nanozyme, the transition metal doped GeO2 nanozyme have lower Michaelis-Menten constants and higher catalytic activity, indicating that the Pd and Fe doped GeO2 nanozyme not only enhance their affinity for the substrate but also improve its catalytic activity. In addition, a colorimetric sensor based on the GeO2@Pd–H2O2-TMB system was constructed for the visual detection of simazine in water samples due to the good affinity between TMB and simazine. This sensor has good selectivity and sensitivity with a detection limit of 6.21 μM because of the highest catalytic performance of GeO2@Pd nanozyme. This study broadens the application of nanozymes in environmental field and other nanozymes can also be enhanced in activity by simple transition metal doping.
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