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UV-vis absorption spectra of nitroblue tetrazolium solution (a) photocatalytic illumination and (b) sonocatalytic irradiation using MgTi2O5 nanoparticles; PL emission spectra of terephthalic acid in alkaline solution under (c) photocatalytic illumination and (d) sonocatalytic irradiation withMgTi2O5 nanoparticles.
