naa a22 4500 510749607 CHVBK 20180411083059.0 cr unu---uuuuu 180411e20130901xx s 000 0 eng 10.1007/s11270-013-1726-7 doi (NATIONALLICENCE)springer-10.1007/s11270-013-1726-7 Enhanced Dual-Effect of Adsorption and Photodegradation of SiO2 Embedded TiO2 Hybrid Catalyst for Improved Decolourization of Methylene Blue [Elektronische Daten] [Shilpa Sonar, Reshma Wagh, Prashant Niphadkar, Praphulla Joshi, Shilpa Deshpande, Shobhana Awate] Dual-effects of adsorption and photodegradation over titania, silica embedded titania, silica and commercial Degussa P-25 samples were studied for the decolourization of methylene blue in aqueous medium. Silica embedded titania and silica were prepared using inexpensive polymeric version of ethyl silicate as a source of silica. Catalysts were characterized by X-ray diffraction, scanning electron microscopy, UV-Vis spectroscopy and low temperature (77K) nitrogen adsorption measurements. Among all the catalysts, silica embedded titania has exhibited faster decolourization of methylene blue solution on account of the enhancement of adsorption followed by degradation. An amount of the catalyst and the initial dye concentration of MB solution were found to influence the decolourization activity. Compared to titania catalyst, silica embedded titania and Degussa P-25 have shown the red shift in their UV-Vis spectrum. The experimental data of the reaction fitted well to the pseudo first order kinetic model. In present studies, the adsorption mechanism for the decolourization of MB solution was found to be applicable for an intra particle diffusion model. Springer Science+Business Media Dordrecht, 2013 Adsorption nationallicence Photodegradation nationallicence Silica embedded titania nationallicence Methylene blue nationallicence Kinetic model nationallicence Sonar Shilpa Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut Wagh Reshma Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut Niphadkar Prashant Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut Joshi Praphulla Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut Deshpande Shilpa Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut Awate Shobhana Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-12 0049-6979 224:9<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1726-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1726-7 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sonar Shilpa Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut NATIONALLICENCE 700 1- Wagh Reshma Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut NATIONALLICENCE 700 1- Niphadkar Prashant Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut NATIONALLICENCE 700 1- Joshi Praphulla Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut NATIONALLICENCE 700 1- Deshpande Shilpa Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut NATIONALLICENCE 700 1- Awate Shobhana Catalysis & Inorganic Chemistry Division, CSIR-National Chemical Laboratory, Dr. Homi Bhabha Road, Pashan, 411008, Pune, India aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/9(2013-09-01), 1-12 0049-6979 224:9<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer