Utilization of fly ash (FA) wastes as the carriers of catalysts for the environmental application is an economic and practical strategy for their low cost, easy accessibility and thermal stability. However, most catalysts immobilized on fly ash were metal or metal oxides, some potential catalysts such as metal phthalocyanine 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 nest-like surfaces of fly ash microspheres after NaOH activation. It is noted that the FeOCPc@FA composites with only 2 wt.% exhibited the high catalytic efficiency in the organic dye degradation. The high concentration of 30 mg/L rhodamine B and methylene blue could be fast decolorized in the presence of FeOCPc@FA–2 % and KHSO₅. Moreover, the ultrafast decolorization of these dyes could be observed in the 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 catalytic processes, the probable generation pathway of metal–oxygen active species and various radicals were analyzed to explicate the catalytic mechanism. Our investigation provides a high efficiency, low cost and environmentally friendly strategy for advanced oxidation treatment of organic pollutants.

利用飞灰 (FA) 废物作为催化剂载体用于环境应用是一种经济实用的策略，因为它们成本低、易于获得和热稳定性好。然而，大多数固定在飞灰上的催化剂是金属或金属氧化物，一些潜在的催化剂如金属酞菁配合物在以 FA 为载体的非均相催化方面尚未见报道。本文将高活性八羧基酞菁铁经NaOH活化后固定在粉煤灰微球的鸟巢状表面上。值得注意的是，仅 2 wt.% 的 FeOCPc@FA 复合材料在有机染料降解中表现出高催化效率。在 FeOCPc@FA–2 % 和 KHSO 存在下，高浓度 30 mg/L 罗丹明 B 和亚甲蓝可以快速脱色₅ . _{此外，在由 FeOCPc@FA–2 %、KHSO 5}和 BuOOH（叔丁基过氧化氢）组成的催化体系中可以观察到这些染料的超快脱色。在我们设计的催化系统中可以实现KHSO _{5和 BuOOH 的同时活化。}基于催化过程中产生的复合材料和活性物质的结构表征，分析了金属-氧活性物质和各种自由基的可能生成途径，以阐明催化机理。我们的研究为有机污染物的高级氧化处理提供了一种高效、低成本和环保的策略。