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        Simultaneous activation of KHSO5 and BuOOH by iron octacarboxyphthalocyanine loaded on fly ash microspheres to boost pollutant degradation

        Dapeng Li,Peng Zhang,Jiangtao Duan,Yaxin Wu,Na Ding,Zhenyu Wan,Longqi Chen,Jingli Xu,Suxiang Ge,Juntao Ma 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-

        Utilization of fly ash (FA) wastes as the carriers of catalysts for the environmental application is an economicand practical strategy for their low cost, easy accessibility and thermal stability. However, mostcatalysts immobilized on fly ash were metal or metal oxides, some potential catalysts such as metalphthalocyanine complexes have not been reported upon their heterogeneous catalysis with FA as the carriers. In this paper, highly active iron octacarboxyphthalocyanine were immobilized onto the bird nestlikesurfaces of fly ash microspheres after NaOH activation. It is noted that the FeOCPc@FA compositeswith only 2 wt.% exhibited the high catalytic efficiency in the organic dye degradation. The high concentrationof 30 mg/L rhodamine B and methylene blue could be fast decolorized in the presence ofFeOCPc@FA–2 % and KHSO5. Moreover, the ultrafast decolorization of these dyes could be observed inthe catalytic system composed of FeOCPc@FA–2 %, KHSO5 and BuOOH (tert-butyl hydroperoxide). Simultaneous activation of KHSO5 and BuOOH could be realized in our designed catalytic system. Based on the structural characterizations of composites and active species generated during the catalyticprocesses, the probable generation pathway of metal–oxygen active species and various radicals wereanalyzed to explicate the catalytic mechanism. Our investigation provides a high efficiency, low costand environmentally friendly strategy for advanced oxidation treatment of organic pollutants.

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