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- W3155133071 abstract "Efficient iodine gas capture is necessitated in many industries like spent nuclear fuel off-gas treatment in view of environmental protection and resource recycling. However, the adsorption efficiency and stability of the current adsorbents are limited. In the present work, efficient and stable barbituric and thiobarbituric acid-based UiO-66-NH 2 adsorbents (i.e., UiO-66-NH-B.D and UiO-66-NH-T.D, respectively) have been synthesized by post-synthetic covalent modification. Characterization approaches, including SEM-EDS, TEM, XRD, FTIR, XPS, 1 H NMR, TGA and BET, are used to obtain information on the properties and adsorption mechanisms of these metal-organic framework (MOF) adsorbents. The kinetics and mechanisms involved are studied in detail. The treatment efficiency and recyclability of the adsorbents are checked and compared with the adsorbents reported in previous works. The results show that the current adsorbents are potentially suitable for efficient iodine gas capture. High maximum iodine adsorption amount by UiO-66-NH-B.D and UiO-66-NH-T.D (1.17 and 1.33 g/g) was achieved under 75 °C. These new adsorbents are thermally stable for iodine adsorption and regenerated and reused with good performance. The adsorption mechanisms were revealed based on experimental results, indicating that iodine is adsorbed by both physisorption and chemisorption. • Novel UiO-66-NH-T.D and UiO-66-NH-B.D MOF adsorbents were synthesized. • UiO-66-NH-T.D exhibited up to 1.33 g/g adsorption capacity for iodine gas. • These MOF adsorbents showed good recyclability and stability. • Mechanisms of iodine gas adsorption on the adsorbents have been discussed." @default.
- W3155133071 created "2021-04-26" @default.
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- W3155133071 date "2021-08-01" @default.
- W3155133071 modified "2023-10-16" @default.
- W3155133071 title "Barbituric and thiobarbituric acid-based UiO-66-NH2 adsorbents for iodine gas capture: Characterization, efficiency and mechanisms" @default.
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- W3155133071 doi "https://doi.org/10.1016/j.jhazmat.2021.125835" @default.
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