Photodegradation of Methyl Orange in Aqueous Solution by the Visible Light Active Co:La:TiO2 Nanocomposite

Abstract

In this study, the Co:La:TiO 2 nanocomposite was prepared by the wet chemical method. Synthesized TiO 2 and Co:La:TiO 2 were characterized by X-Ray Diffractometer, SEM, TEM, UV-vis, FT-IR, Band gap energy and BET. The TiO 2 and Co:La:TiO 2 were used as photocatalyst for the degradation of Methyl Blue. The XRD pattern confirmed the presence of anatase and rutile phase in the catalyst. The particle size was estimated by the Scherrer's and found 68 and 32 nm for TiO 2 and Co:La:TiO 2 respectively. The particle morphology of the photocatalysts was found in nanodiamension. The surface area of the photocatalysts was found 37.52 and 106.68 m 2 /g for TiO 2 and Co:La:TiO 2 respectively. The band gap energy of TiO 2 and Co:La:TiO 2 were 3.2 and 3.0 eV. The photodegradation of Methyl Orange has been found 18% and 88% at 5 pH for TiO 2 and Co:La:TiO 2 respectively. The photodegradation of Methyl Orange has been found 19% and 98.9% at 25 ppm concentration of dye. The photodegradation of Methyl Orange has been found 25% and 96% at 800 mg/L amount of photocatalyst and 180 min illumination of visible light. The photodegradation was following the first order kinetics.

Photocatalytic Degradation of Citric Acid in Wastewater in Presence of Visible Light by La:Ni:TiO<sub>2</sub> Nanocomposite

“…The extrapolation of graph yields an Eg value of 3.2 eV which is, in fact, the band gap of Titania. But for the sample of La:Ni:TiO 2 nanocomposite the indirect plot yield band gap values of 3.0 eV [36][37]. The band gap energy is decreasing in La:Ni:TiO 2 nanocomposite because the lanthanum and Nickel forms a sub-band level between the valence band and the conduction band.…”

Photocatalytic Degradation of Food and Juices Dyes via Photocatalytic Nanomaterials Synthesized through Green Synthetic Route: A Systematic Review

“…The concentration of the dye or toxin can affect the degradation efficiency. Higher concentrations of the target compound can lead to saturation of the active sites on the photocatalyst surface, leading to decreased degradation efficiency [ 63 ].…”

Development of PSA@PS-TiO2 nanocomposite photocatalyst: structure, mechanism, and application using response surface designs and molecular modeling

“…Nanocomposites, on the other hand, are a recent discipline of nanoscience concerned with the structure, application, and synthesis of disperse phase and matrix phase in a multiphase system of composites in which nanoparticles are scattered in the matrix (Azad & Gajanan 2017;Ravichandran et al 2018). Titanium dioxide (TiO 2 ) is the most promising photocatalyst owing to its non-toxicity, chemical stability, and high photocatalytic activity (Binas et al 2017).…”