Silver modified SBA-15 for Iodine entrapment
Résumé
A green solvent-free approach was used to produce grey coloured Ag/AgNO3 functionalised SBA-15. This easy to handle powder was then used to extract molecular Iodine from cyclohexane by simple addition and filtration. The resulting yellow powder was examined by UV-Vis, FT-IR, XRD, TGA and SEM/TEM. It was found that nanosized AgI particles were now present on/in the porous silica support. Despite numerous washing steps with a range of solvents (ranging from cyclohexane to water) no leeching was observed. The sorbent proved highly efficient extracting 0.46 moles of I2 for every mole of silver, almost 1:1 Ag:I. Finally, TGA demonstrated an increased melting point for AgI indicating a degree of protection from the silica support. This is important when considering transformation into the final waste form.
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2020-Moloney-Iodine Solvent free approach-JIOPM.pdf (899.48 Ko)
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