Fig. 3

a The ABTS⁺ scavenging ratio of MoSe₂-PVP NPs. b The UV–Vis absorption spectra of ABTS⁺ solution after treated with different concentrations of MoSe₂-PVP NPs. c The scavenging ratio of MoSe₂-PVP NPs, and d the photographs of before and after reaction. e The UV–Vis absorption spectra of MoSe₂-PVP NPs for TMB coloration under the presence of H₂O₂, and f the kinetic change at 650 nm of MoSe₂-PVP NPs for TMB coloration under the presence of H₂O₂