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Kalithasan Natarajan,Hari C. Bajaj,Rajesh J. Tayade 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.34 No.-
BiOX (X = Br, Cl and I) nanoplate photocatalysts were synthesized by hydrothermal method. Thephotocatalytic activity of the synthesized catalysts was evaluated for RhB dye degradation under fourtypes of light emitting diodes (LEDs) irradiation possesses different wavelength. 100% RhB dyedegradation was achieved for BiOCl and BiOBr catalysts within 120 and 240 min under UVLEDirradiation. Whereas BiOI catalyst owns 83.4% degradation under red LED (RLED) irradiation at the end of240 min. Our study reveals that BiOI photocatalyst could be effective for RhB dye degradation undercheaper RLED irradiation rather than UVLED.
Rajesh Jagannath Tayade,Kalithasan Natarajan,Puspendra Singh,Hari Chand Bajaj 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.6
Photocatalytic composite materials having photon absorption capability in the range of visible light were synthesized by loading TiO2 (5, 10, 15, and 20 wt%) on ferrite nanocomposites by sol-gel auto-combustion method. The synthesized nanocomposites were analyzed using X-ray diffraction, Transmission electron microscopy, diffuse reflectance spectroscopy and N2 adsorption techniques. The generation of photo active hydroxyl radicals for all the synthesized composites was found higher under the irradiation of red LED (RLED irradiation) which was confirmed by degradation of rhodamine B dye under irradiation of RLED. Photocatalytic activity of the synthesized nanocomposites was also carried out under irradiation of ultraviolet (UVLED) and blue (BLED) light emitting diodes, which is comparatively less than for the reaction under red LED irradiation. The operational parameters like catalyst amount, pH and concentration of dye solution were studied and ESI-MS degradation pathway is proposed by analyzing the degraded samples.