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Photocatalysis of Basic Black 2 (Janus Black) Dye Using Titanium Dioxide Doped with Zinc (Zn-TiO2)

Ayebe B, Yelling M, Amana BS, Obadahun J and Pascaline PL

Photocatalysis of basic black 2 (janus black) dye was carried out to evaluate the effect of time, metal load concentration and light source on the photodegradation of basic black 2 dye. The catalyst was synthesized by wet-impregnation of zinc onto titanium dioxide followed by calcinations at 500°C. The catalyst characterization results indicated that the synthesized TiO2 powder had a pure two phases of anatase and rutile structures. The level of mineralization of basic black 2 dyes was monitored by taking the absorbance of the dye solution before and after irradiation with the light source at an interval of 20 min. The results obtained indicated that the efficiency of photodegradation of basic black 2 dye was 99.92%, 95.94% and 74.46% using 1%, 3% and 5% Zn-TiO2 under visible light and 98.22%, 97.46% and 73.61% using 1%, 3% and 5% Zn-TiO2 under UV light after irradiation for 80 min respectively.