TY - JOUR
T1 - Amino-functionalized MOF-on-MOF architectural nanocomplexes composed for radioactive-iodine efficient adsorption
AU - Liu, Linshuai
AU - Chen, Lifeng
AU - Thummavichai, Kunyapat
AU - Ye, Zhenxiong
AU - Wang, Youbin
AU - Fujita, Toyohisa
AU - Wang, Xinpeng
N1 - Funding information: The authors gratefully acknowledge the National Natural Science Foundation of China (NO. 12075066, 21866007) and the Open Foundation of Guangxi Key Laboratory of Processing for Non-Ferrous Metals and Featured Materials, Guangxi University.
PY - 2023/10/15
Y1 - 2023/10/15
N2 - The effective capture of radioactive iodine vapor is crucial for radiation safety during spent fuel reprocessing. However, current materials used for iodine vapor capture have limitations such as low adsorption efficiency and poor stability, which hinder the effectiveness. To address this issue, an efficient, stable, recoverable and heterogeneous MOF-on-MOF [NH2-MIL-101-on-NH2-UiO-66] adsorbent was prepared using the epitaxial growth strategy. The adsorbent was extensively characterized with various technologies including FT-IR, XPS and XRD, and batch experiments were conducted to evaluate the performance in iodine gas adsorption. Results showed that the adsorption capacity of NH2-MIL-101-on-NH2-UiO-66 reached 1930 mg/g at 80 °C and ambient pressure, outperforming the parent MOFs, with a 20–33% higher adsorption rate and a 1.52–2.74 times higher adsorption capacity. Notably, the adsorbent exhibited superior performance compared to commercial silver-exchanged zeolite and other MOFs adsorbents. The excellent adsorption performance of this adsorbent can be attributed to its abundant adsorption sites and well-defined pore structure. Additionally, the adsorbent displayed good thermal stability, withstanding temperatures up to 360℃. Overall, this study provides a highly effective material for iodine vapor adsorption and contributes to the understanding of novel MOF-on-MOF architectures and the applications.
AB - The effective capture of radioactive iodine vapor is crucial for radiation safety during spent fuel reprocessing. However, current materials used for iodine vapor capture have limitations such as low adsorption efficiency and poor stability, which hinder the effectiveness. To address this issue, an efficient, stable, recoverable and heterogeneous MOF-on-MOF [NH2-MIL-101-on-NH2-UiO-66] adsorbent was prepared using the epitaxial growth strategy. The adsorbent was extensively characterized with various technologies including FT-IR, XPS and XRD, and batch experiments were conducted to evaluate the performance in iodine gas adsorption. Results showed that the adsorption capacity of NH2-MIL-101-on-NH2-UiO-66 reached 1930 mg/g at 80 °C and ambient pressure, outperforming the parent MOFs, with a 20–33% higher adsorption rate and a 1.52–2.74 times higher adsorption capacity. Notably, the adsorbent exhibited superior performance compared to commercial silver-exchanged zeolite and other MOFs adsorbents. The excellent adsorption performance of this adsorbent can be attributed to its abundant adsorption sites and well-defined pore structure. Additionally, the adsorbent displayed good thermal stability, withstanding temperatures up to 360℃. Overall, this study provides a highly effective material for iodine vapor adsorption and contributes to the understanding of novel MOF-on-MOF architectures and the applications.
KW - Adsorption
KW - Amine functionalization
KW - DFT
KW - MOF-on-MOF
KW - Radioactive iodine
UR - http://www.scopus.com/inward/record.url?scp=85170428277&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2023.145858
DO - 10.1016/j.cej.2023.145858
M3 - Article
AN - SCOPUS:85170428277
SN - 1385-8947
VL - 474
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 145858
ER -