Journal
LANGMUIR
Volume 28, Issue 13, Pages 5695-5702Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la3003417
Keywords
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Funding
- Defense Threat Reduction Agency [BA07PRO105]
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Adsorption of sulfur dioxide on 10 nm CoFe2O4 spinel ferrite nanoparticles was examined. Adsorption loadings of sulfur dioxide at breakthrough conditions were determined to be approximately 0.62 mol/kg, which is significant given the 150 m(2)/g surface area of the nanoparticles. Adsorption proceeds through a chemisorption mechanism with sulfur dioxide forming a sulfate upon adsorption on the particle surface, which leads to a 23% decrease in the remnant magnetization, a 20% decrease in the saturation magnetization, and a 9% decrease in the coercivity of the magnetic nanoparticles. Adsorbent materials that provide a magnetic signal when adsorption occurs could have broad implications on adsorption-based separations.
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