Photocatalytic degradation of cationic and anionic dyes by a novel nanophotocatalyst of TiO2/ZnTiO3/αFe2O3 by ultraviolet light irradiation
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In this study, TiO2 nanoparticles were synthesized by sol–gel method and then modified with ZnTiO3 and αFe2O3 nanoparticles to enhance the photocatalytic properties. The synthesized materials were characterized by FESEM, XRD, FTIR, and UV–visible techniques and used to the removal of cationic azo dye (methylene blue) and anionic azo dye (methyl orange) from aqueous solutions. The factors affecting the photocatalytic degradation of dyes, including the initial concentration of dye, photocatalyst amount, pH of the dye solution, and the time of radiation were investigated. The TiO2 and TiO2/ZnTiO3/αFe2O3 samples indicated a bandgap energy of 3.10 and 2.17 eV, respectively, which suggests better photocatalytic properties for TiO2/ZnTiO3/αFe2O3 sample compared to TiO2. Also, the photocatalytic activity of TiO2/ZnTiO3/αFe2O3 was further developed in the visible range. The relationship between the photocatalytic performance of the samples and their structures shows that ZnTiO3 and hematite deposits can significantly enhance the photocatalytic efficiency of TiO2 nanoparticles.
Financial support of this work by ACECR Institute of Higher Education (Isfahan Branch) is gratefully appreciated.
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- 2.Y. Hunge, Photoelectrocatalytic degradation of methylene blue using spray deposited ZnO thin films under UV illumination. MOJ Poly Sci. 1(4), 00020 (2017)Google Scholar
- 3.E. Bazrafshan, M. Ahmadabadi, A.H. Mahvi, Reactive red-120 removal by activated carbon obtained from cumin herb wastes. Fresenius Environ. Bull. 22(2a), 584–590 (2013)Google Scholar
- 5.A.H. Movahedian, R. Rezaei, Investigating the efficiency of advanced photochemical oxidation (APO) technology in degradation of direct azo dye by UV/H2O2 process. Wat. Wast. 17(3), 75–83 (2006)Google Scholar
- 6.I. Fajriati, Mudasir, E.T. Wahyuni, The Influence of Cu(II) on methyl orange and methylene blue photodegradation catalyzed by TiO2–chitosan nanocomposites. Int. J. Adv. Chem. Eng. Biol. Sci. (IJACEBS) 1, 21–24 (2014)Google Scholar
- 8.A. Jonidi Jafari et al., Photocatalytic removal of aniline from synthetic wastewater using ZnO nanoparticle under ultraviolet irradiation. Iran. J. Health Environ. 5(2), 167–178 (2012)Google Scholar
- 28.A. Mohseni et al., Synthesis TiO2/SiO2/Ag triple nanocomposite by sonochemical method and investigation of photo-catalyst effect in wastewater treatment, in Nanocon, Brno, Czech Republic (2013)Google Scholar
- 42.R. Liu et al., Synthesis and bactericidal ability of TiO2 and Ag–TiO2 prepared by coprecipitation method. Int. J. Photoenerg. 2012, 1–7 (2012)Google Scholar
- 50.T. Yetim, T. Tekin, A kinetic study on photocatalytic and sonophotocatalytic degradation of textile dyes. Period. Polytech. Chem. Eng. 61(2), 102 (2017)Google Scholar
- 55.S. Abo-Farha, Photocatalytic degradation of monoazo and diazo dyes in wastewater on nanometer-sized TiO2. J. Am. Sci. 6(11), 130–142 (2010)Google Scholar
- 59.Z. Ghasemi, H. Younesi, A.A. Zinatizadeh, Preparation, characterization and photocatalytic application of TiO2/Fe-ZSM-5 nanocomposite for the treatment of petroleum refinery wastewater: optimization of process parameters by response surface methodology. Chemosphere 159, 552–564 (2016)CrossRefGoogle Scholar