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Carboxylate-functionalized organic nanocrystals for high-capacity uranium sorbents

Title
Carboxylate-functionalized organic nanocrystals for high-capacity uranium sorbents
Authors
Park, JinkyuBae, JaeyeonJin, KangwooPark, Jinhee
DGIST Authors
Park, Jinhee
Issue Date
2019-06
Citation
Journal of Hazardous Materials, 371, 243-252
Type
Article
Article Type
Article
Author Keywords
Organic nanocrystalNaphthalene diimidesPerylene diimidesUraniumHigh-capacity sorbent
Keywords
MESOPOROUS SILICASELECTIVE SEPARATIONCARBONEXTRACTIONFRAMEWORKSORPTIONREMOVALMICROSPHERESADSORBENTSNANOTUBES
ISSN
0304-3894
Abstract
Carboxylate-functionalized organic nanocrystals (ONCs) derived from perylene diimide or naphthalene diimide were synthesized and carefully characterized as novel high-capacity uranium (U(VI)) sorbents. Adsorption studies using uranyl ions demonstrated that the carboxyl and hydroxyl groups on the surface of the ONCs play pivotal roles in U(VI) adsorption. ONCs formed from the condensation of perylene dianhydride and aminoisophthalic acid exhibit very high U(VI) adsorption capacities of 1393 mg g −1 comparable to the highest capacity ever reported. The adsorption kinetics of the ONCs were found to obey the second-order model, indicating that chemisorption is the rate-determining step for U(VI) adsorption by these materials. Furthermore, the perylene-based ONC containing imidazole exhibited no pH dependency upon the U(VI) adsorption and the naphthalene-based ONC was able to remove up to 97.5% U(VI) from simulated nuclear industrial effluent containing many competing elements. These findings will facilitate the development of high-performance organic U(VI) sorbents with high densities of adsorption sites. © 2019 Elsevier B.V.
URI
http://hdl.handle.net/20.500.11750/9785
DOI
10.1016/j.jhazmat.2019.03.007
Publisher
Elsevier BV
Related Researcher
  • Author Park, Jinhee Organic-Inorganic Hybrids Lab
  • Research Interests Organic-Inorganic Hybrid Materials; Metal-Organic Polyheda;Metal-Organic Frameworks; Porous Polymer Networks
Files:
There are no files associated with this item.
Collection:
Department of Emerging Materials ScienceOrganic-Inorganic Hybrids Lab1. Journal Articles


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