Abstract
We report a novel FeS₂ loaded large SiO₂ sphere (diameter of 3 cm) via double immobilization with (3-mercaptopropyl)trimethoxysilane (KH590) as a highly efficient, stable, and tweezers-recoverable heterogeneous Fenton-like catalyst (FeS₂/KH590/SiO₂@KH590). Notably, as-prepared composite catalyst exhibits a significant recycling improvement (10 runs) over free FeS₂ powder (3 runs). The outstanding recyclability and stability of FeS₂/KH590/SiO₂@KH590 can be attributed to the passivation of FeS₂ nanoparticles on SiO₂ surface by KH590 and subsequent prevention of Fe2+ leaching. Overall, our work provides a new avenue towards fabricating composite Fenton-like catalyst with high stability, enhanced recyclability and the advantage of easy separation.
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