Study on the Preparation and Separation Performance of Microwave-Assisted Ru(IV)-TIIP

The porous thermosensitive imprinted polymer of MW-Ru(IV)-TIIP was prepared in a short time with the aid of a microwave. The structure and morphology of MW-Ru(IV)-TIIP were characterized by ATR-FTIR, SEM-EDS, and BET. The thermosensitive block PDEA- b -P(DEA- co -AM) was introduced into the imprinted polymer preparation system. N-MAM and AA were selected as functional monomers, and stable HIPE Pickering emulsions were prepared under high-speed stirring, combined with multi-field coupling technology. The synthesis process of MW-Ru(IV)-TIIP was studied, and the dosages of template ion, functional monomer, and cross-linking agent, as well as microwave power, polymerization temperature, and polymerization time, were optimized. Under optimal technological conditions, the maximum adsorption capacity of MW-Ru(IV)-TIIP reached 0.20 mmol L −1 at 33°C, and adsorption equilibrium was reached within 240 min. Theoretical studies showed that the adsorption of MW-Ru(IV)-TIIP conformed to the quasi-first-order kinetic model and the Langmuir model. When MW-Ru(IV)-TIIP was applied to a diluted platinum group catalyst leaching solution, its adsorption capacity for MW-Ru(IV)-TIIP to Ru was 0.23 mmol L −1 , and the purity of platinum group metals increased from 53.72% to 76.43% after one adsorption/desorption cycle. After 11 reuses, the adsorption capacity maintained 70.06% of the original capacity, indicating that MW-Ru(IV)-TIIP had good potential in industrial applications.