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Hierarchically porous BiOCl@NiCo2O4 nanoplates as low-cost and highly efficient catalysts for the discoloration of organic contaminants in aqueous media

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Abstract

The construction of noble metal-free materials with remarkable activity and high stability via a simple, green, efficient, and low-cost method remains a crucial task for addressing the problem of water contamination. Herein, ultrathin NiCo2O4 nanosheets were in situ assembled on the surface of BiOCl single-crystal nanosheets with a vertical orientation to form a well-defined hierarchically porous structure. Notably, the obtained BiOCl@NiCo2O4 nanoplates displayed outstanding catalytic activity in the reductive conversion of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). On account of their special morphology, plentiful porosity, and good stability, the as-prepared composite could finish the reduction reaction within 280 s with a large rate constant (kapp) of 7.18 × 10−3 s−1. The BiOCl@NiCo2O4 nanoplates possessed excellent recyclability, and the original activity could be maintained even after seven consecutive cycles. Furthermore, the resultant BiOCl@NiCo2O4 could also act as a hyperactive catalyst for the reductive discoloration of organic dyes (rhodamine B, rhodamine 6G, Congo red, and methyl orange). Our strategy, therefore, promotes the development of low-cost and high-performance noble metal-free catalysts to treat water pollution.

Graphical abstract: Hierarchically porous BiOCl@NiCo2O4 nanoplates as low-cost and highly efficient catalysts for the discoloration of organic contaminants in aqueous media

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Publication details

The article was received on 10 Oct 2019, accepted on 20 Nov 2019 and first published on 20 Nov 2019


Article type: Paper
DOI: 10.1039/C9NJ05100G
New J. Chem., 2020, Advance Article

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    Hierarchically porous BiOCl@NiCo2O4 nanoplates as low-cost and highly efficient catalysts for the discoloration of organic contaminants in aqueous media

    L. Zhi, Y. Xu, S. Zhang, D. Hu and J. Liu, New J. Chem., 2020, Advance Article , DOI: 10.1039/C9NJ05100G

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