Enhanced Peroxidase-Like Activity of Fe-Doped MoS₂ Nanozyme for Colorimetric Detection of H₂O₂ and Hydroquinone

In this study, petal-like Fe-doped MoS2nanocomposites were synthesized via a one-step hydrothermal method. Compared with the pure MoS2, the resultant catalyst exhibited enhanced peroxidase-like activity. The synthesized Fe-doped MoS2was carefully characterized by SEM, TEM, XPS and XRD. And influences of pH, temperature and H2O2concentration on the catalytic activity of Fe-doped MoS2were investigated. Besides, Fe-doped MoS2 displayed a strong affinity towards H2O2and 3,3 ′ ,5,5 ′ -tetramethylbenzidine (TMB). Owing to the excellent peroxidase-like activity of the Fe-doped MoS2nanozyme, colorimetric and smartphone-assisted identification methods were developed for sensitive detection of hydroquinone (HQ). It was believed that the efficient biosensor based on the synthesized Fe-doped MoS2nanoflower can apply for biological analysis and environmental monitoring.