• Amit Kumar Behera

Light both in visible and UV ranges are employed in Photo-catalytic processes to excite semiconductor materials to produce electron/hole pair which ultimately detoxifies the pollutants present in water. TiO2 is one of the most promising photo-catalysts used in wastewater treatment. However, it shows poor activity in visible light irradiation. In this work, Ag-doped TiO2 photo-catalyst was synthesized using UV photo-reduction method to narrow down the band gap energy. TiO2 was suspended in a deaerated solution and dispersed by sonication. The solution containing 16.8 g TiO2 and Ag (220: 1 w/w) in 100 mL solution water and ethanol (90:10 v/v). The solution pH was adjusted to 4 before the reaction .The suspension was continuously agitated and irradiated under high pressure Hg lamp for Ag+ photo-reduction to Ag0. In addition of this, Eriochrome cyanine red, an anionic dye, was employed to sensitize Ag/TiO2 catalyst by expanding its photo-response to visible range. Catalyst characterizations were performed in terms of solid UV-spectroscopy, X-ray diffraction, zeta potential analysis and by measuring the specific surface area using chemisorption technique. The performance of dye sensitized Ag-doped TiO2 catalyst was tested through oxidative degradation of a model effluent laden with phenol.

Photo-catalyst; Photo-reduction; Dye-sensitization; Phenol, Eriochrome cyanine red, TiO2.

"synthesis of dye sensitized mono-metallic TiO2 Photo-catalyst and phenol degradation", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.237-244, August-2018, Available :http://www.jetir.org/papers/JETIR1808516.pdf

"synthesis of dye sensitized mono-metallic TiO2 Photo-catalyst and phenol degradation", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp237-244, August-2018, Available at : http://www.jetir.org/papers/JETIR1808516.pdf