Hierarchically Porous Silica Prepared with Anionic Polyelectrolyte-Nonionic Surfactant Mesomorphous Complex as Dynamic Template

Shi, CX (Shi, Chengxiang)^[ 1 ] ; Wang, H (Wang, Huan)^[ 1 ] ; Bi, QL (Bi, Qiulin)^[ 1 ] ; Li, LQ (Li, Liqing)^[ 1 ] ; Sun, PC (Sun, Pingchuan)^[ 2,3 ] ; Chen, TH (Chen, Tiehong)^[ 1,3 ]

ACS OMEGA, 2019, 4(1): 1443-1448

DOI: 10.1021/acsomega.8b03565

Abstract

Hierarchically porous silica KIT-6 and SBA-15 mesostructures were successfully synthesized by using a mesomorphous complex of a nonionic triblock copolymer (pluronic P123) and an anionic polyelectrolyte (polyacrylic acid) as the dynamic template. The obtained mesoporous silica materials possessed both ordered mesopores (similar to 7 nm) and nanopores (similar to 15-50 nm), and the long-range order of the mesophase was not perturbed by the embedded larger secondary nanopores. Moreover, hierarchically porous silica KIT-6 exhibited enhanced adsorption capacity in enzyme and protein immobilization, which was attributed to the hierarchically porous structure.