Operando SERS self-monitoring photocatalytic oxidation of aminophenol on TiO2 semiconductor

Surface enhanced Raman scattering (SERS) was used for the fingerprint-tracking of the photocatalytic oxidation of p-aminothiophenol (PATP) on TiO2 substrate. The photocatalytic degradation under 532 nm laser irradiation initiated from the formation of azo compound was explicitly revealed by the finely resolved operando SERS spectra and the decomposition rates of different bonds were respectively determined.