title: Solid Amine Adsorbent Prepared by Molecular Imprinting and Its Carbon Dioxide Adsorption Properties.
abstract: A carbon dioxide imprinted solid amine adsorbent (IPEIA-R) with polyethylenimine (PEI) as a skeleton was conveniently prepared by using glutaraldehyde to cross-link carbon dioxide-preadsorbed PEI. As confirmed by FTIR, FT-Raman, and13C NMR spectroscopy, CO2preadsorbed on PEI could occupy the reactive sites of amino groups and act as a template for imprinting in the cross-linking process. The imino groups formed from the cross-linking reaction between glutaraldehyde and PEI could be reduced by NaBH4to form CO2-adsorbable amino groups. The adsorption results indicated that CO2imprinting and reduction of imino groups by NaBH4endowed the adsorbent with a higher CO2adsorption capacity. Compared with PEI-supported mesoporous adsorbents, the solid amine adsorbent with PEI as a skeleton can avoid serious pore blockage and CO2diffusion resistance, even with a high amine content. The solid amine adsorbent with PEI as a skeleton showed a remarkable CO2adsorption capacity (8.56 mmol g-1) in the presence of water at 25 °C, owing to the high amine content and good swelling properties. It also showed promising regeneration performance and could maintain almost the same CO2adsorption capacity after 15 adsorption-desorption cycles.
authors: PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, 510275, Guangzhou, P.R. China.
authors: Hui
authors: H
authors: He
authors: PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, 510275, Guangzhou, P.R. China.
authors: Linzhou
authors: L
authors: Zhuang
authors: PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, 510275, Guangzhou, P.R. China.|Materials Science Institute, Sun Yat-Sen University, 510275, Guangzhou, P.R. China.
authors: Shuixia
authors: S
authors: Chen
authors: PCFM Lab, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, 510275, Guangzhou, P.R. China.
authors: Hucheng
authors: H
authors: Liu
keywords: adsorption; amines; imprinting; polymers; surface chemistry