Photocatalytic degradation of dyes and organic contaminants in water using nanocrystalline anatase and rutile TiO2

By R. Tayade, Praveen K. Surolia, R. Kulkarni, R. Jasra. 2007

309 citations recorded by the source corpus.

Abstract Nanocrystalline TiO2 was synthesized by controlled hydrolysis of titanium tetraisopropoxide. The anatase phase was converted to rutile phase by thermal treatment at 1023 K for 11 h. The catalysts were characterized by X-ray diffraction (XRD), diffuse reflectance spectroscopy (DRS), Fourier-transform infrared absorption spectrophotometry (FT-IR) and N2 adsorption (BET) at 77 K. This study compare the photocatalytic activity of the anatase and rutile phases of nanocrystalline TiO2 for the degradation of acetophenone, nitrobenzene, methylene blue and malachite green present in aqueous solutions. The initial rate of degradation was calculated to compare the photocatalytic activity of anatase and rutile nanocrystalline TiO2 for the degradation of different substances under ultraviolet light irradiation. The higher photocatalytic activity was obtained in anatase phase TiO2 for the degradation of all substances as compared with rutile phase. It is concluded that the higher photocatalytic activity in anatase TiO2 is due to parameters like band-gap, number of hydroxyl groups, surface area and porosity of the catalyst.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/e07e3c9c9dc6ad0aff7d3eaaa76de756cf3457a9

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In Materials Chemistry

1. H. Bajaj
2. R. Tayade
3. Abdul Latif Ahmad

In Renewable Energy, Sustainability and the Environment

1. H. Bajaj
2. S. Natarajan
3. R. Tayade
4. A. Mikhaylov

Citations in the corpus

• Experimental Study of Influencing Factors and Kinetics in Catalytic Removal of Methylene Blue with TiO 2 Nanopowder (2012, background): “The photocatalytic activity of semiconductors is dependent on the band gap energy, crystallinity, particle size, surface area, pore structure and concentration of the impurities in the catalysts[26,27].”
• Recent advances based on the synergetic effect of adsorption for removal of dyes from waste water using photocatalytic process. (2017, methodology): “The complete degradation of MB dye was obtained within 2–3 hr using zeolite based composite materials, whereas it was found 82% using pristine TiO2 in 4 hr irradiation of ultraviolet light which was also supported by chemical oxygen demand analysis (Tayade et al., 2007a).”
• A Systematic Review of Metal Oxide Applications for Energy and Environmental Sustainability (2020, background): “1 g/100 mL could effectively work on 20 ppm of dye concentration [71].”
• Preparation of pvdf-tio2 mixed-matrix membrane and its evaluation on dye adsorption and uv-cleaning properties (2012, background): “[19], as well as Yu and Chuang [20] studied the photocatalytic oxidation of MB in aqueous TiO2 suspension.”