title: Preparation of cross-linked bimodal mesoporous SBA-15 with numerous pore openings.
abstract: Using poly (ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer (P123) as template and tetraethyl orthosilicate as silica source, well-ordered cross-linked bimodal mesoporous SBA-15 was easily prepared via an one-pot synthetic strategy, where a pre-self-assembly of P123 with TEOS in strong acidic media was introduced followed by pH-adjusting. The pH-adjusting can effectively change the copolymer micelle size, which directly lead to the formation of the bimodal mesoporous structure at pH range of 6-7.5, with most typical value at pH = 7.5. Meanwhile, these bimodal mesopores are interconnected, which generates a 3D intra-particle porosity with many pore-openings on the surfaces of particles. After modified with tetraethylenepentamine, the as-synthesized bimodal mesoporous SBA-15 exhibited the CO2 adsorption capacities much higher than as-synthesized conventional SBA-15. These bimodal mesoporous SBA-15 materials have great potential application in CO2 capture.
authors: Key Laboratory of Mesoscopic Chemistry of the Ministry of Education, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
authors: Hui-Min
authors: HM
authors: Zhao
authors: Li
authors: L
authors: Ma
authors: Dan
authors: D
authors: Lin
authors: Kun-Kun
authors: KK
authors: Han
authors: Yuan
authors: Y
authors: Chun
authors: Qin-Hua
authors: QH
authors: Xu