Optimisation of Methyl Orange Photodegradation Using TiO₂-Zeolite Photocatalyst and H₂O₂ in Acid Condition

Abstract

This paper discusses an optimisation of methyl orange photodegradation using TiO2-zeolite photocatalyst and H2O2 (with condition of pH 2, 10 ppm, UV light). A 15 mmol TiO2 in 1 gram activated zeolite was used. The influence of H2O2 concentration (4, 8, 12, 16%) and irradiation time (20, 30 40, 50, 60 minutes) was also investigated, as well as initial methyl orange concentration (10, 20, 30 ppm) toward reaction rate constant. As the H2O2 concentration increase, the photodegradation percentage is also increased until it reaches optimum condition (H2O212% for 10 ppm MO solution). Identical effect also showed by the irradiation time in which an optimum point reached at 60 minutes (for 10 ppm MO solution) and 50 minutes (for 20 and 30 ppm MO solutions). Moreover, the higher initial MO concentration used, the lower reaction rate constant obtained. The highest rate constant was shown by MO solution of 10 ppm. The reuse of TiO2-Zeolite photocatalyst remains effective and efficient in photodegradation of methyl orange in solution for up to 4 times.

Green Production of Zero-Valent Iron (ZVI) Using Tea-Leaf Extracts for Fenton Degradation of Mixed Rhodamine B and Methyl Orange Dyes

“…Meanwhile, methyl orange before the catalytic process was identified at m / z 327. A signal appeared with m / z 304 and 306 from methyl orange, which lost sodium ions and underwent rearrangement [ 70 ]. The results of a mixture of dyes refer to the retention time of each component before being mixed.…”

Scavenging of Organic Pollutant And Fuel Generation Through Cost-Effective And Abundantly Accessible Rust: An Economical Approach For Waste Management And Energy Generation

“…The sample was then kept in dark to attain adsorption-desorption equilibrium. The sample was then kept under standard light with constant and continuous stirring for different irradiation times (1,3,5,7,9, and 11 min). After the reaction time completion, the photocatalyst was separated through centrifugation (12000 rpm for 10 min).…”

“…This is because at the beginning formation of • OH radicals is faster and the more availability of the active site for dye adsorption. After a particular reaction time, the remaining active site is not easy to ll because of the repulsive force between the molecules on the surface with the bulk phase, and thus after sometime the %degradation tends to be constant (Aziztyana et al 2019). The sustainability of Fe 2 O 3 NPs is evaluated by utilizing recovered and re-recovered Fe 2 O 3 NPs under the same experimental conditions.…”

Synthesis and crystal structures of zinc(II) coordination polymers of trimethylenedipyridine (tmdp), 4-nitrobenzoic (Hnba) and 4-biphenylcarboxylic acid (Hbiphen) for adsorptive removal of methyl orange from aqueous solution

“…Due to their industrial applications, dyes are found in effluents from pharmaceutical, pulp and paper, paint, and some other industries. About one fifth of all the dyes produced worldwide gets discharged into waterbodies through the effluents from textile industries [10].The most abundant compounds (60 -70 %) in textile waste are azo dyes [11].…”