TY - JOUR
T1 - Polyacrylonitrile-chalcogel hybrid sorbents for radioiodine capture
AU - Riley, Brian J.
AU - Pierce, David A.
AU - Chun, Jaehun
AU - Matyáš, Josef
AU - Lepry, William C.
AU - Garn, Troy G.
AU - Law, Jack D.
AU - Kanatzidis, Mercouri G.
PY - 2014/5/20
Y1 - 2014/5/20
N2 - Powders of a Sn2S3 chalcogen-based aerogel (chalcogel) were combined with powdered polyacrylonitrile (PAN) in different mass ratios (SnS33, SnS50, and SnS70; # = mass% of chalcogel), dissolved in dimethyl sulfoxide, and added dropwise to deionized water to form pellets of a porous PAN-chalcogel hybrid material. These pellets, along with pure powdered (SnSp) and granular (SnSg) forms of the chalcogel, were then used to capture iodine gas under both dynamic (dilute) and static (concentrated) conditions. Both SnSp and SnS g chalcogels showed very high iodine loadings at 67.2 and 68.3 mass%, respectively. The SnS50 hybrid sorbent demonstrated a high, although slightly reduced, maximum iodine loading (53.5 mass%) with greatly improved mechanical rigidity. In all cases, X-ray diffraction results showed the formation of crystalline SnI4 and SnI4(S8) 2, revealing that the iodine binding in these materials is mainly due to a chemisorption process, although a small amount of physisorption was observed.
AB - Powders of a Sn2S3 chalcogen-based aerogel (chalcogel) were combined with powdered polyacrylonitrile (PAN) in different mass ratios (SnS33, SnS50, and SnS70; # = mass% of chalcogel), dissolved in dimethyl sulfoxide, and added dropwise to deionized water to form pellets of a porous PAN-chalcogel hybrid material. These pellets, along with pure powdered (SnSp) and granular (SnSg) forms of the chalcogel, were then used to capture iodine gas under both dynamic (dilute) and static (concentrated) conditions. Both SnSp and SnS g chalcogels showed very high iodine loadings at 67.2 and 68.3 mass%, respectively. The SnS50 hybrid sorbent demonstrated a high, although slightly reduced, maximum iodine loading (53.5 mass%) with greatly improved mechanical rigidity. In all cases, X-ray diffraction results showed the formation of crystalline SnI4 and SnI4(S8) 2, revealing that the iodine binding in these materials is mainly due to a chemisorption process, although a small amount of physisorption was observed.
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U2 - 10.1021/es405807w
DO - 10.1021/es405807w
M3 - Article
C2 - 24779585
AN - SCOPUS:84901045138
VL - 48
SP - 5832
EP - 5839
JO - Environmental Science & Technology
JF - Environmental Science & Technology
SN - 0013-936X
IS - 10
ER -