Facet effect of hematite on the hydrolysis of phthalate esters under ambient humidity conditions

Xin Jin, Dingding Wu, Cun Liu, Shuhan Huang, Ziyan Zhou, Hao Wu, Xiru Chen, Meiying Huang, Shaoda Zhou and Cheng Gu ()
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Xin Jin: Nanjing University
Dingding Wu: Nanjing University
Cun Liu: Chinese Academy of Sciences
Shuhan Huang: Nanjing University
Ziyan Zhou: Nanjing University
Hao Wu: Nanjing University
Xiru Chen: Nanjing University
Meiying Huang: Chinese Academy of Sciences
Shaoda Zhou: Nanjing Kaver Scientific Instrument Co. Ltd.
Cheng Gu: Nanjing University

Nature Communications, 2022, vol. 13, issue 1, 1-11

Abstract: Abstract Phthalate esters (PAEs) have been extensively used as additives in plastics and wallcovering, causing severe environmental contamination and increasing public health concerns. Here, we find that hematite nanoparticles with specific facet-control can efficiently catalyze PAEs hydrolysis under ambient humidity conditions, with the hydrolysis rates 2 orders of magnitude higher than that in water saturated condition. The catalytic performance of hematite shows a significant facet-dependence with the reactivity in the order {012} > {104} ≫ {001}, related to the atomic array of surface undercoordinated Fe. The {012} and {104} facets with the proper neighboring Fe-Fe distance of 0.34-0.39 nm can bidentately coordinate with PAEs, and thus induce much stronger Lewis-acid catalysis. Our study may inspire the development of nanomaterials with appropriate surface atomic arrays, improves our understanding for the natural transformation of PAEs under low humidity environment, and provides a promising approach to remediate/purify the ambient air contaminated by PAEs.

Date: 2022
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DOI: 10.1038/s41467-022-33950-1

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