[SnS] Anion-Intercalated Layered Double Hydroxides for Highly Efficient Capture of Iodine.

ACS Appl Mater Interfaces

Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China.

Published: October 2023

The development of low-cost and high-efficiency iodine sorbents is of great significance for the control of nuclear pollution. In this work, we intercalate the tin sulfide cluster of [SnS] to Mg/Al-type layered double hydroxides to obtain SnS-LDH, which exhibits highly efficient capture performance of iodine vapor and iodine in solutions. The dispersion effect of the positively charged LDH layers contributes to the adequate exposure of [SnS] anions, providing plentiful adsorption sites. For iodine vapor, SnS-LDH showed an extremely large iodine capture capacity of 2954 mg/g with a large contribution from physisorption. For iodine in solutions, a significantly large sorption capacity of 1308 mg/g was achieved. During iodine capture, I molecules were reduced to I ions (by S in [SnS]), which then reacted with Sn to form SnI, where the molar amount of captured iodine is 4-fold that of Sn. Besides, the as-reduced I combined with I again to generate [I], which then entered the LDH interlayers to maintain electric neutrality. While reducing iodine, S itself in [SnS] was oxidized to S, which further combined with SnI to form a novel compound of SnI(S). The excellent iodine capture capability endows SnS-LDH with a promising application in trapping radioactive iodine.

Download full-text PDF

Source
http://dx.doi.org/10.1021/acsami.3c11367DOI Listing

Publication Analysis

Top Keywords

iodine
12
iodine capture
12
layered double
8
double hydroxides
8
highly efficient
8
efficient capture
8
iodine vapor
8
iodine solutions
8
[sns]
5
capture
5

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!