Simultaneous capture of trace benzene and SO2 in a robust Ni(II)-pyrazolate framework

Guang-Rui Si, Xiang-Jing Kong, Tao He, Zhengqing Zhang and Jian-Rong Li ()
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Guang-Rui Si: Beijing University of Technology
Xiang-Jing Kong: Beijing University of Technology
Tao He: Beijing University of Technology
Zhengqing Zhang: Tiangong University
Jian-Rong Li: Beijing University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Benzene and SO2, coexisting as hazardous air pollutants in some cases, such as in coke oven emissions, have led to detrimental health and environmental effects. Physisorbents offer promise in capturing benzene and SO2, while their performance compromises at low concentration. Particularly, the simultaneous capture of trace benzene and SO2 under humid conditions is attractive but challenging. Here, we address this issue by constructing a robust pyrazolate metal-organic framework (MOF) sorbent featuring rich accessible Ni(II) sites with low affinity to water and good stability. This material achieves a high benzene uptake of 5.08 mmol g–1 at 10 Pa, surpassing previous benchmarks. More importantly, it exhibits an adsorption capacity of ~0.51 mmol g–1 for 10 ppm benzene and ~1.21 mmol g–1 for 250 ppm SO2 under 30% relative humidity. This work demonstrates that a pioneering MOF enables simultaneous capture of trace benzene and SO2, highlighting the potential of physisorbents for industrial effluent remediation, even in the presence of moisture.

Date: 2024
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DOI: 10.1038/s41467-024-51522-3

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