Photocatalytic degradation of methylene blue using TiO2 supported in ceramic material

Abstract

The present work evaluates the use of ceramic material, produced with the aid of industrial waste through the Gel-Casting method, as a support for catalysts in the photocatalytic degradation of Methylene Blue. The analysis was carried out in a reactor containing UVC lamps through batch processing. The results show that the reaction of photocatalytic degradation of the dye presents pseudo-first order kinetics, with values of degradation between 60 and 70 %. The study evaluated the deactivation of the catalysts synthesized and supported in the ceramic material. In this case, it was observed that the larger the mass of deposited catalyst on the ceramic support, the longer the lifespan of the sample, since a larger mass takes longer to deactivate.

Kinetics of photocatalytic degradation of organic compounds: a mini-review and new approach

“…33–39 Peters et al reported PCD of rhodamine B using TiO 2 supported in ceramic. 40 This study demonstrated that kinetic data obeyed the PFO model by fitting eqn (15) with the contact time, revealing a high correlation coefficient ( R 2 = 0.9923). Investigating PCD for ofloxacin using Mn-doped CuO photocatalyst, Liu et al showed that the PFO model exhibited good compliance with experimental results ( R 2 = 0.9813).…”

“… 89 At low C P,0 , good fits of the PFO to experimental kinetic data presented for PCD of tetracycline ( C P,0 = 0.11 mmol L −1 ) on Fe-doping g-C 3 N 4 , 88 rhodamine B ( C P,0 = 0.01 mmol L −1 ) on TiO 2 supported porous ceramic. 40 For PCD of methylene blue on flower-like titanium nanoparticle, the compatibility between the experimental result and the PFO model was weaker with an increase in C P,0 through the reduction of R 2 value from 0.9953 down to 0.9664 corresponding to C P,0 from 0.03 up to 0.22 mmol L −1 . 90 Qu et al studied the PCD of methylene blue and congo red on photocatalytic nanoparticles derived from marine clam shells.…”

“…It means the contaminant's light absorbance is a faint contribution to the PCD kinetic. Similar comparison works were also built to apply for PCD of various organic compounds such as tetracycline, 88 rhodamine B, 40 methylene blue, and congo red. 89 At low C P,0 , good fits of the PFO to experimental kinetic data presented for PCD of tetracycline ( C P,0 = 0.11 mmol L −1 ) on Fe-doping g-C 3 N 4 , 88 rhodamine B ( C P,0 = 0.01 mmol L −1 ) on TiO 2 supported porous ceramic.…”