Study effect of titanium dioxide on the photocatalytic degradation of methyl violet dye

Abstract

The organic pollutant methyl violet dye photocatalytic degradation has been investigated using the UV irradiation and TiO2 as a catalyst. The degradation process included the study of the initial dye concentration, light intensity, catalyst weight, the effect of intensity of light, and effect of temperature to approach the best conditions for the optimum photo-degradation efficiency of dye. The optimum photocatalytic degradation of methyl violet dye was at 0.15 g/100cm3 of dosage mass of TiO2 and 10 ppm of the dye. Photocatalytic degradation of methyl violet dye was at 9 mW/cm2light intensity. The percentage efficiency of degradation methyl violet dye equals 97.46%.

Hydrothermally synthesized titanium/hydroxyapatite as photoactive and antibacterial biomaterial

“…With the comparable Ti content (20 wt%), this removal efficiency is higher compared to the use of TiO 2 /Clinoptilolite which showed the removal of 80% [ 32 ]. Based on Ti content, the turn over number which calculated based on removal efficiency per mass of Ti is also comparable respect to that of achieved by TiO 2 (97.4%) and comparable with Nano-TiO 2 /Diatomite (99.9% for 210 min) [ [32] , [33] , [34] ]. The photocatalytic activity of Ti/HA sample in this work is also higher compared to TiSiW 12 O 40 /TiO 2 photocatalyst for the same MV initial concentration and photocatalyst dosage.…”

“… Photocatalyst Removal at 120 min (%) Remark Reference Ti/Pd 86.3 Degradation efficiency of 90% was obtained by TiO 2 /Pd nanoparticles at 0.025 g/100 mL catalyst dose. [ 31 ] TiO 2 /Clinoptilolite 82 Removal efficiency of 80% was achived by TiO 2 /clinoptilolite at the dose of 0.75 g/L [ 32 ] TiO 2 97.4 Removal efficiency was achieved by the photocatalyst dosage of 0.25 g/100 mL [ 33 ] Co 3 O 4 @SiO 2 @TiO 2 –Ag 100 Removal of about 98% was achieved after 40 min and the photocatalyst has the magnetic properties [ 34 ] Nano-TiO 2 /Diatomite 99.9 The removal efficiency of 99.99% was achieved in 210 min of irradiation time at pH 10. [ 35 ] TiSiW 12 O 40 /TiO 2 82.4 The removal of 82.4% was achieved for 20 mg/L of MV, catalyst dosage is 0.3 g/L, and the pH is 5.5 for 3 h under natural light irradiation.…”

Photocatalytic removal of an azo dye from solutions using ZnO and modified ZnO: Benzoic acid azo dye as a model

“…Catalyst and the other chemicals were supplied from Sigma Aldrich and Fluka. The synthesis of the azo dye has been mentioned in the literature [31], and the photodegradation part has also been mentioned in literature [32,33]. The processes can be summarised as follows: Benzoic acid azo dye was prepared from a coupling reaction of p-aminobenzoic acid with 2-methylnaphthol.…”