BiOI/melamine foam as an extremely efficient and highly recyclable catalyst for the treatment of continuous flow organic pollutants.

Authors

Xinrui Luo, Li Tan, Liping Wu, Qiuxia Liu

Published in

RSC advances. Volume 15. Issue 31. Pages 25055-25061. Jul 15, 2025. Epub Jul 15, 2025.

Abstract

The use of nano-catalysts to reduce nitroaromatic compounds is a promising wastewater treatment strategy. In this study, melamine foam (MF) is employed as the substrate, and sheet-like bismuth oxide iodide (BiOI) was grown on its surface through a cross-impregnation process involving Bi(NO₃)₃ and KI solution. As a catalyst, bismuth oxide iodide/melamine foam composite (BiOI/MF) exhibits remarkable catalytic activity and excellent durability in the treatment of continuous flow 4-nitrophenol (4-NP) solutions. The loading capacity of BiOI on a 2 × 2 × 2 cm³ MF substrate is notably low at just 0.13 g, yet it can completely reduce 50 mL 4-NP solution (0.37 mmol L^-1) within 32 minutes. After six consecutive cycles, the catalyst maintained a conversion efficiency of over 90%, with the total treatment amount for 4-NP reaching 1.49 × 10^-2 mmol. Furthermore, BiOI/MF also exhibited high catalytic reduction activity towards other organic pollutants, such as methylene blue and methyl orange solutions. In this study, we propose an efficient and cost-effective composite catalyst that offers technical guidance for the practical treatment of wastewater and sewage.

PMID:
40673247
Bibliographic data and abstract were imported from PubMed on 17 Jul 2025.

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