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Title: Exploiting π–π Interactions to Design an Efficient Sorbent for Atrazine Removal from Water

Abstract

The United States Environmental Protection Agency (EPA) recognizes atrazine, a commonly used herbicide, as an endocrine disrupting compound. Excessive use of this agrochemical results in contamination of surface and ground water supplies via agricultural runoff. Efficient removal of atrazine from contaminated water supplies is paramount. Here, the mechanism governing atrazine adsorption in Zr 6-based MOFs has been thoroughly investigated by studying the effects of MOF linker and topology on atrazine uptake capacity and uptake kinetics. We found that the mesopores of NU-1000 facilitated rapid atrazine uptake saturating in < 5 min and that the pyrene-based linkers offered sufficient sites for π-π interactions with atrazine as demonstrated by the near 100% uptake. Without the presence of a pyrene-based linker, NU-1008, a MOF similar to NU-1000 with respect to surface area and pore size, removed <20% of the exposed atrazine. Here, these results suggest that the atrazine uptake capacity demonstrated by NU-1000 stems from the presence of a pyrene core in the MOF linker, affirming that π-π stacking is responsible for driving atrazine adsorption. Furthermore, NU-1000 displays an exceptional atrazine removal capacity through 3 cycles of adsorption-desorption. Powder X-ray diffraction (PXRD) and Brunauer–Emmett–Teller (BET) surface area analysis confirmed the retention of MOFmore » crystallinity and porosity throughout the adsorption-desorption cycles.« less

Authors:
 [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Northwestern Univ. and International Inst. of Nanotechnology, Evanston, IL (United States)
Publication Date:
Research Org.:
Univ. of Minnesota, Minneapolis, MN (United States). Nanoporous Materials Genome Center
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Contributing Org.:
International Institute for Nanotechnology (IIN)
OSTI Identifier:
1508098
Grant/Contract Number:  
SC0008688; FG02-17ER16362
Resource Type:
Accepted Manuscript
Journal Name:
ACS Applied Materials and Interfaces
Additional Journal Information:
Journal Volume: 11; Journal Issue: 6; Journal ID: ISSN 1944-8244
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; adsorption; adsorption mechanism; atrazine; metal−organic frameworks; π−π interactions

Citation Formats

Akpinar, Isil, Drout, Riki J., Islamoglu, Timur, Kato, Satoshi, Lyu, Jiafei, and Farha, Omar K. Exploiting π–π Interactions to Design an Efficient Sorbent for Atrazine Removal from Water. United States: N. p., 2019. Web. doi:10.1021/acsami.8b20355.
Akpinar, Isil, Drout, Riki J., Islamoglu, Timur, Kato, Satoshi, Lyu, Jiafei, & Farha, Omar K. Exploiting π–π Interactions to Design an Efficient Sorbent for Atrazine Removal from Water. United States. doi:10.1021/acsami.8b20355.
Akpinar, Isil, Drout, Riki J., Islamoglu, Timur, Kato, Satoshi, Lyu, Jiafei, and Farha, Omar K. Fri . "Exploiting π–π Interactions to Design an Efficient Sorbent for Atrazine Removal from Water". United States. doi:10.1021/acsami.8b20355.
@article{osti_1508098,
title = {Exploiting π–π Interactions to Design an Efficient Sorbent for Atrazine Removal from Water},
author = {Akpinar, Isil and Drout, Riki J. and Islamoglu, Timur and Kato, Satoshi and Lyu, Jiafei and Farha, Omar K.},
abstractNote = {The United States Environmental Protection Agency (EPA) recognizes atrazine, a commonly used herbicide, as an endocrine disrupting compound. Excessive use of this agrochemical results in contamination of surface and ground water supplies via agricultural runoff. Efficient removal of atrazine from contaminated water supplies is paramount. Here, the mechanism governing atrazine adsorption in Zr6-based MOFs has been thoroughly investigated by studying the effects of MOF linker and topology on atrazine uptake capacity and uptake kinetics. We found that the mesopores of NU-1000 facilitated rapid atrazine uptake saturating in < 5 min and that the pyrene-based linkers offered sufficient sites for π-π interactions with atrazine as demonstrated by the near 100% uptake. Without the presence of a pyrene-based linker, NU-1008, a MOF similar to NU-1000 with respect to surface area and pore size, removed <20% of the exposed atrazine. Here, these results suggest that the atrazine uptake capacity demonstrated by NU-1000 stems from the presence of a pyrene core in the MOF linker, affirming that π-π stacking is responsible for driving atrazine adsorption. Furthermore, NU-1000 displays an exceptional atrazine removal capacity through 3 cycles of adsorption-desorption. Powder X-ray diffraction (PXRD) and Brunauer–Emmett–Teller (BET) surface area analysis confirmed the retention of MOF crystallinity and porosity throughout the adsorption-desorption cycles.},
doi = {10.1021/acsami.8b20355},
journal = {ACS Applied Materials and Interfaces},
number = 6,
volume = 11,
place = {United States},
year = {2019},
month = {2}
}

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This content will become publicly available on February 1, 2020
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