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Sonolytic, sonocatalytic and sonophotocatalytic degradation of a methyl violet 2B using iron-based catalyst
Reaction Kinetics, Mechanisms and Catalysis ( IF 1.8 ) Pub Date : 2020-11-01 , DOI: 10.1007/s11144-020-01902-9
Amina Benomara , Fouad Guenfoud , Malika Mokhtari , Amel Boudjemaa

The degradation of methyl violet 2B was efficiently carried out using sonolytic and sonophotocatalytic processes, FePO4 is a heterogeneous catalyst which has already shown its efficiency for the photocatalytic degradation of the earlier mentioned dye was used as a catalyst for the sonolytic process under a constant frequency of 500 kHz, effect of the parameters: pH, catalyst concentration ultrasonic intensity and dye concentration were also studied. The results show that a better degradation occurred under acidic pH (pH 3) with 1 g/L of the catalyst and an ultrasonic power P = 80 W. To further optimize the degradation process, ultrasound was coupled with UV radiation (λ = 254 nm), the dye degradation was improved from 68% using the sonolysis process to 100% using the sonophotocatalytic process with FePO4 as heterogeneous catalyst. Finally, degradation byproducts formed under optimized conditions were identified.



中文翻译:

使用铁基催化剂对甲基紫2B进行声催化,声催化和声光催化降解

甲基紫2B的降解可通过声催化和声光催化工艺有效地进行,FePO 4是一种非均相催化剂,已经显示出其对前述染料的光催化降解效率,在恒定频率下用作声催化工艺的催化剂在500 kHz时,还研究了以下参数的影响:pH,催化剂浓度,超声强度和染料浓度。结果表明,在酸性pH(pH 3)下,使用1 g / L的催化剂和超声功率P = 80 W时,降解效果更好。为进一步优化降解过程,超声与紫外线(λ= 254 nm)耦合),使用FePO进行声光催化处理,染料降解率从使用超声波分解工艺的68%改善到100%4作为多相催化剂。最后,鉴定了在优化条件下形成的降解副产物。

更新日期:2020-11-02
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