Facile one-pot synthesis of copper hexacyanoferrate nanoparticle functionalised silica monoliths for the selective entrapment of ¹³⁷Cs

Abstract

Copper hexacyanoferrate nanoparticle functionalised silica monoliths were synthesized following a one-pot procedure to selectively uptake radioactive 137Cs in water.

Solvent-assisted synthesis of potassium copper hexacyanoferrate embedded 3D-interconnected porous hydrogel for highly selective and rapid cesium ion removal

“…Since metal HCF has a well-known perovskite-like face-centered cubic crystal structure, with a channel diameter of around 3.2 Å, small hydrated cations such as Cs + can be inserted, whereas the larger hydrated ions such as Na + are selectively rejected [4,19]. Particularly, copper hexacyanoferrate has been widely used due to its simple preparation, low cost, superior Cs + capture properties, and chemical stability over a wide pH range [3,17,18,20]. In spite of the advantageous structural properties for the selective removal of Cs + , one of the main drawbacks of the adsorbent is related to its ultra-fine particle size, increasing the difficulty to remove the occupied ion exchangers following adsorption [21].…”

“…In order to address such issues, numerous studies have considered the immobilization of the small sized metal HCF particles, either by grafting onto porous media [5,16,20,22], or encapsulating in a polymer matrix [1,3,23,24]. Turgis et al…”

Nanostructured potassium copper hexacyanoferrate-cellulose hydrogel for selective and rapid cesium adsorption

“…Since the former strategy immobilizes ion-exchangers onto the support surface, porous materials such as mesoporous silica [19,20] and carbon allotropes [21][22][23][24] are normally used. For the latter, ion-exchangers can be immobilized by encapsulation in polymer matrices such as chitin [3,18], alginate [21,25], and polyacrylic acid [26].…”

Improved adsorption properties of granulated copper hexacyanoferrate with multi-scale porous networks

“…One potential Cs adsorbent is copper hexacyanoferrate (CuHCF) because of its high Cs selectivity, high capacity, rapid sorption, good thermal and radiation stability, low cost, low toxicity, and chemical stability in a wide pH range. [40][41][42][43] Additionally, the basic adsorption performance of the CuHCF was improved by nanoparticulation and surface modication method, as we reported previously.…”