Photocatalytic degradation of C.I. Basic Violet 10 using TiO2 catalysts supported by Y zeolite: An investigation of the effects of operational parameters

Photocatalytic removal of reactive yellow 145 dye from simulated textile wastewaters over supported (Co, Ni)3O4/Al2O3 co-catalyst

“…These observations can be explained according to the laws of photochemistry, initially at low concentrations of catalyst the number of absorbing light particles is few, and therefore there will be a direct proportionality between incident photons and particles of the catalyst. At high concentrations of the catalyst with the same light source intensity, particles of catalyst would form inner fi lter which absorbs the photons and prevents passing to other side of reaction mixture 33- 34 . High doses of the used catalyst can cause light scattering which leads to increase turbidity of the reaction mixture.…”

Changing the characteristics and properties of zeolite Y and nano-anatase in the formation of a nano-anatase/Y composite with improved photocatalytic and adsorption properties

“…According to the literature data, NTD/Y nanocomposites combine the properties of the initial components: photocatalytic (Domoroshchina et al 2017;Kuwahara et al 2012;Wang et al 2008Wang et al , 2015Kamegawa et al 2013;Jansson et al 2015;Maraschi et al 2014), adsorption (Domoroshchina et al 2017;Kravchenko et al 2016;Zendehdel et al 2014), and bactericidal (Domoroshchina et al 2017).…”

“…Basic Violet 10 in suspension (Wang et al 2008), marbofloxacin and enrofloxacin in water (Maraschi et al 2014), Methyl Orange dye in water (Domoroshchina et al 2017;Wang et al 2015), formaldehyde and trichloroethylene in gas phase under UV (Jansson et al 2015) and the degradation of 2-propanol in water under visible light (Kamegawa et al 2013).…”

“…The following methods are currently used for the synthesis of nanocomposites NTD/Y: -Ion exchange between the Na + and NH 4+ forms of zeolite Y in an aqueous solution of (NH 4 ) 2 (TiNO)(C 2 O 4 ) 2 followed by calcination at 400-550 °C (nanocrystalline NTD in NTD/Y) (Liu et al 1992;Zhang et al 1995;Alwash et al 2013;Easwaramoorthi and Natarajan 2009); -Wet impregnation of zeolite NaY (Alwash et al 2013;Kuwahara et al 2012;Wang et al 2008) or HY (Kamegawa et al 2013) with a TiO 2 sol followed by evaporation of the liquid, drying, and calcination at 350-600 °C (amorphous (Alwash et al 2013) or nanocrystalline (Wang et al 2008) NTD in NTD/Y); -Mechanical mixing of NTD, which was synthesized by the sol-gel method (Maraschi et al 2014), via the hydrolysis of titanium isopropoxide (Xu and Langford 1997) or a solution of titanium tetraisopropoxide in ethanol (Ito et al 2014), with HY zeolite (Maraschi et al 2014) or NaY zeolite (Xu and Langford 1997;Ito et al 2014); the separation of the precipitate, washing, drying, and annealing at 350-450 °C [nanocrystalline NTD in NTD/Y (Xu and Langford 1997;Ito et al 2014)]; -A sol-gel method using titanate n-butyl acetate followed by annealing at 400 °C (Easwaramoorthi and Natarajan 2009;Wang et al 2015), the degree of crystallinity of the composite decreases with an increase in TiO 2 loading (Easwaramoorthi and Natarajan 2009) In NTD/Y nanocomposites synthesized by the ion exchange reaction (Liu et al 1992;Zhang et al 1995;Alwash et al 2013), nanocrystalline NTD occupies zeolite cavities (group II), as it was demonstrated by X-ray photoelectron spectroscopy (XPS), IR spectroscopy, X-ray powder diffraction, scanning (SEM) and transmission electron microscopy (TEM). In NTD/Y synthesized by wet impregnation (Alwash et al 2013;Jansson et al 2015) or mechanical mixing techniques (Maraschi et al 2014), amorphous …”

Preparation, Characterization and Photocatalytic Behaviour of Codoped Nanophotocatalyst

“…It is estimated that 15% of the total world dye production is lost during dyeing process and it is released in textile effluents. The colours produced by minute amount of dye accidentally released in water during dyeing process are considered to pose serious problems because they have considerable environmental effects on the water and make them visually unpleasant 2 . Azo dyes are known to be largely nonbiodegradable.…”