In 2 O 3 -modified diatomite nanomaterials with different indium oxide contents were prepared via an efficient sonochemical technique. The as-prepared compounds products were analyzed by means of energy dispersive X-ray photoelectron spectroscopy (EDX), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Brunauer-Emmett-Teller (BET) techniques. As indicated by XRD, diatomite phase and indium oxide peaks were observed. The BET specific surface area and pore volume of In 2 O 3 -coated diatomite is greater than pure diatom. The surface morphology and high porosity of diatom can be utilized as the template to boost potential of functional materials. The photocatalytic activities of as-prepared compounds were assessed for the decolorization of methylene blue. The results revealed that diatomite modified with indium oxide can be used in different experimental runs with no essential drop in photocatalytic activity.
