S-doped Fe single atoms as efficient peroxidase-like nanozymes for colorimetric detection of oxytetracycline

Abstract

An Fe single atom supported on S, N co-doped graphite catalyst (Fe₁/SCN) with both micro- and mesopores is reported. Fe₁/SCN exhibits high catalytic properties in a peroxidase-like (POD-like) reaction. The doping of S increases the number of defects and changes the electronic structure of Fe, boosting the POD-like performance.