Abstract

PHOTOCATALYTIC DEGRADATION OF TEXTILE DYE DIRECT BLUE 86 BY BIO-SYNTHESIZED ZNO NANOPARTICLES BY MODIFIED SOLUTION-COMBUSTION METHOD

J.Sirajudeen, J.Naveen* and S.Arulmanikandan

Abstract

The ZnO nanoparticles were synthesized with zinc nitrate as a precursor and plant leaf powder as a fuel at 600˚C through the slightly modified solution-combustion method. The synthesized ZnO nanoparticles were subjected to XRD, FT-IR and UV-visible absorption. The XRD result shows that the synthesized ZnO nanoparticles has a main peak at 36.33° belongs to (101) plane implies that the ZnO has wurtzite structure with hexagonal cell unit. From the debye-scherrer formula the synthesized ZnO NPs possess the particle size calculated for (101) plane is 30.9 nm. The peak at 467 cm-1 and 675 cm-1 in the FT-IR spectra is the characteristic stretching mode vibration of Zn-O matrix. The synthesized nanoparticles was processed to the photocatalytic degradation activity on the dye direct blue 86 which was often used in the textile industries. The dye direct blue 86 was considerably degraded by as-synthesized ZnO surface under UV irradiation at degradation time 120 min with the maximum dosage 50 mg.

Keywords: ZnO nanoparticles, solution combustion method, direct blue 86, photocatalytic degradation.