Abstract
Solution combustion synthesized ZnO (SCSZ) and commercially available Degussa P-25 TiO2 was tested for the photocatalytic degradation of Brilliant Yellow (BY) under both UV/Solar light. Powder X-ray Diffraction (PXRD) results revealed crystalline wurtzite phase with P63mc space group for combustion derived ZnO. The scanning electron micrographs (SEM) of ZnO sample shows that the powder products are voluminous and porous. Diffused Reflectance Spectral studies indicated the extension of the band gap to the visible region for ZnO due to its smaller crystallite size. Fourier transform infrared spectra (FTIR) of as-formed SCSZ displayed strong band at 425 cm-1 which confirms the stretching vibration of Zn-O bond. SCSZ showed enhanced activity for the degradation of BY under UV/solar light compared to Degussa P-25 which was attributed to high crystallinity, large surface area of the sample and enhanced degree of hydroxylation on the surface of ZnO.
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