期刊
ACS APPLIED MATERIALS & INTERFACES
卷 9, 期 38, 页码 32907-32919出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.7b10290
关键词
iodine; aerogel; silver; thiolation
资金
- Department of Energy Office of Nuclear Energy
In this paper, aluminosilicate aerogels were used as scaffolds for silver nanoparticles to capture I-2(g). The starting materials for these scaffolds included Na-Al-Si-O and Al-Si-O aerogels, both synthesized from metal alkoxides. The Ag-0 particles were added by soaking the aerogels in aqueous AgNO3 solutions followed by drying and Ag+ reduction under H-2/Ar to form Ag-0 crystallites within the aerogel matrix. In some cases, aerogels were thiolated with 3-(mercaptopropyl)trimethoxysilane as an alternative method for binding Ag+. During the Ag+-impregnation steps, for the Na-Al-Si-O aerogels, Na was replaced with Ag, and for the Al-Si-O aerogels, Si was replaced with Ag. The Ag-loading of thiolated versus nonthiolated Na-Al-Si-O aerogels was comparable at similar to 35 atomic %, whereas the Ag-loading in unthiolated Al-Si-O aerogels was significantly lower at similar to 7 atomic % after identical treatment. Iodine loadings in both thiolated and unthiolated Ag-0-functionalized Na-Al-Si-O aerogels were >0.5 m(I) m(s)(-1) (denoting the mass of iodine captured per starting mass of the sorbent) showing almost complete utilization of the Ag through chemisorption to form AgI. Iodine loading in the thiolated and Ag-0-functionalized Al-Si-O aerogel was 0.31 m(I) m(s)(-1). The control of Ag uptake over solution residence time and [Ag] demonstrates the ability to customize the Ag-loading in the base sorbent to regulate the loading capacity of iodine.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据