(A) TEM image and FESEM of DCAS Ns. (B) Schematic illustration of pollutants or H₂O₂ in contact with the catalyst with the active component in the bulk, the multiparous catalyst and DCAS Ns. (C) XPS spectra for Cu 2p_3/2 for DCS Ns and Cu 2p_3/2 for DCAS Ns. (D) EXAFS curve fitting of DCS Ns and DCAS Ns (solid line-experimental signals, dotted line-fitted curves). (E) BPA degradation and TOC removal in different suspensions with H₂O₂. (F) H₂O₂ decomposition and the utilization efficiency of H₂O₂ during the degradation of BPA in the DCAS Ns suspension. (G) BMPO spin trapping ESR spectra recorded at ambient temperature for various DCAS Ns samples with H₂O₂ in aqueous dispersion for BMPO–^•OH and in methanol dispersion for BMPO–HO₂^•/O₂^•−: (1) fresh DCAS Ns; (2) DCAS Ns adsorbed BPA; and (3) DCAS Ns used for 15 min in the Fenton reaction with BPA. Adapted with permission from ref. [9], Copyright©2016, The Royal Society of Chemistry.