Mesoporous silica iron-doped as stable and efficient heterogeneous catalyst for the degradation of C.I. Acid Orange 7 using sono-photo-Fenton process

► C.I. Acid Orange 7 was degraded by integrated sono-photo-Fenton process under ambient conditions. ► Iron-containing mesostructured silica (Fe2O3/SBA-15) was prepared and used as the heterogeneous catalyst. ► Main intermediates was identified and a degradation pathway was proposed.