Insights into the Adsorption of VOCs on a Cobalt-Adeninate Metal-Organic Framework (Bio-MOF-11)

Document Type

Journal Article

Publication Title

ACS Omega

Volume

5

Issue

25

First Page

15402

Last Page

15408

Publisher

American Chemical Society

School

School of Engineering

RAS ID

32894

Funders

National Natural Science Foundation of China China Scholarship Council

Comments

Chen, R., Yao, Z., Han, N., Ma, X., Li, L., Liu, S., ... & Wang, S. (2020). Insights into the adsorption of VOCs on a cobalt-adeninate metal–organic framework (bio-MOF-11). ACS Omega, 5(25), 15402-15408. https://doi.org/10.1021/acsomega.0c01504

Abstract

Copyright © 2020 American Chemical Society. With increasingly severe air pollution brought by volatile organic compounds (VOCs), the search for efficient adsorbents toward VOC removal is of great significance. Herein, an adenine-based metal-organic framework, namely, bio-MOF-11 [Co2(ad)2(CH3CO2)2·0.3EtOH·0.6H2O, ad = adeninate], was synthesized via a facile method, and its VOC adsorption was reported for the first time. This novel bio-MOF-11 was investigated by employing four common VOCs (i.e., methanol, acetone, benzene, and toluene) as adsorbates. The saturated adsorption capacity of these targeted VOCs on bio-MOF-11 was estimated to be 0.73-3.57 mmol/g, following the order: toluene < benzene < acetone < methanol. Furthermore, with the adsorption temperature increasing from 288 to 308 K, the saturated adsorption capacity was reduced by 7.3-35.6%. It is worth noting that acetone adsorption is most sensitive to temperature ascribed to its low boiling point and strong polar nature. Meanwhile, owing to the molecular sieve effect, the adsorption capacity appears negatively correlated to the size of VOC molecules. Besides, the abundant exposed nitrogen atoms and amino groups in bio-MOF-11 cavities facilitate the adsorption of polar VOC molecules. This work promotes the fundamental understanding and practical application of bio-MOF for adsorptive removal of VOCs.

DOI

10.1021/acsomega.0c01504

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