Nitrogen-doped carbonized polyaniline (N-CPANI) for peroxydisulfate (PDS) activation towards efficient degradation of doxycycline (DOX) via the non-radical pathway dominated by electron transfer

•Synthesis of N-doped CPANI for PDS activation towards DOX degradation.•High mineralization of DOX in the N-CPANI-900/PDS with TOC removal efficiency of 83.77%.•High robustness to environmental variations and good recyclability of N-CPANI-900.•The graphitic N and ketonic group(CO) were the main catalytic reactive sites.•N-CPANI-900/PDS complexes mediated electron transfer accounts for the major DOX degradation.