Catalytic oxidation of Methyl Orange by an amorphous FeOOH catalyst developed from a high iron-containing fly ash

Photodegradation mechanism and kinetics of methyl orange catalyzed by Fe(III) and citric acid

“…The release of these colored wastewaters poses a serious threat to the environment [1]. Therefore, the degradation of azo dyes for environmental treatment has received increasing attention [2][3][4].…”

Heterogeneous photo-Fenton decolorization of methylene blue over LiFe(WO4)2 catalyst

“…11, the activity decreased gradually during successive runs. The activity reduction observed may be due to conglomeration of the catalyst and the active phase leaching [27]. However, the removal rate was rather comparable for all the runs at longer reaction times.…”

“…This result is important since it is well known that one major drawback of Fenton reaction is the tight range of pH. The phenomenon that the catalyst could extend the range of pH values for heterogeneous photo-Fenton process may be ascribed to the acid-alkaline buffering capacities of the catalyst caused by Fe-polycations [27]. Increase of the decolorization efficiency could be seen as the pH value increased from 3 to 9.…”

Structural, Optical and Photocatalytic Properties of Co-Tio2 Prepared by Sol-Gel Technique

“…The existence of an optimum hydrogen peroxide concentration is typical and well-known in photo catalytic oxidation. This optimum value was previously found to be 10 mM for MO degradation 24 . PH is another main factor influencing the rate of degradation of some organic compounds in the photo catalytic process.…”