Mesoporous amine‐bridged polysilsesquioxane for CO₂ capture

Abstract

a novel class of amine-supported sorbents based on amine-bridged mesoporous polysilsesquioxane was developed via a simple one-pot sol-gel process. The new sorbent allows the incorporation of a large amount of active groups without sacrificing surface area or pore volume available for CO 2 capture, leading to a CO 2 capture capacity of 3.2 mmol g -1 under simulated flue gas conditions. The sorbent is readily regenerated at 100 °C and exhibits good stability over repetitive adsorption-desorption cycling.

Efficient CO2 sorbents based on silica foam with ultra-large mesopores

“…Triblock copolymer poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) surfactant P123 (EO 20 PO 70 EO 20 , M v ¼ 5800), sodium silicate, acetic acid, ammonium fluoride, polyethylenimines (PEI423, M n z 423 with 5-20% tetraethylenepentamine, and PEI10k, M n z 10 000), glycerol diglycidyl ether (GDE) and ethanol (v/v ¼ 90%) were purchased from Aldrich and used without further purification unless otherwise stated. Deionized water was generated with a Milli-Q integral pure and ultrapure water purification system and used in all experiments.…”

“…In general, large pore size and good pore interconnection tend to improve sorbent capacity. 7,11,[18][19][20] To that end, significant efforts have been directed towards developing supports with optimized structures in order to further improve the performance of sorbents. Mesocellular foams, of sorbents based on hollow mesoporous silica spheres with welldefined sizes and shell thicknesses.…”

The Importance of Precursors and Modification Groups of Aerogels in CO2 Capture

“…Fang et al examined the effect of additive on performance of PEI modified silica aerogels and found among their tested aerogels, a doped SA-PEI-N-Y loaded with 45% PEI and 15% N-Y (N-[3-(Trimethoxysilyl)propyl]ethylenediamine, denoted as N-Y) displayed the highest CO 2 (1.8 mmol g −1 ). Amine-modified SiO 2 aerogels using PEI, and TEPA [ 31 , 32 ], have been developed with a high CO 2 -adsorption capacity of 6.97 mmol∙g −1 (in 10% CO 2 + N 2 ). In another study, Wang et al prepared PEI-modified silsesquioxane aerogels which obtained an adsorption capacity of 3.3 mmol∙g −1 from pure CO 2 [ 33 ].…”

Chemoradiotherapeutic wrinkled mesoporous silica nanoparticles for use in cancer therapy

“…The sharp peak between 1150 and 1000 cm −1 confirms the formation of siloxane bonds and Si-O-Si stretching vibrations. 39,40 The bands at 3300, 3370, 1590, and 789 cm −1 correspond to the symmetric stretching, deformation, and wagging vibration of N-H, respectively. [39][40][41][42] Peaks at 2930 and 2880 cm −1 are due to the vibrations of the methylene groups in SiDETA.…”

“…39,40 The bands at 3300, 3370, 1590, and 789 cm −1 correspond to the symmetric stretching, deformation, and wagging vibration of N-H, respectively. [39][40][41][42] Peaks at 2930 and 2880 cm −1 are due to the vibrations of the methylene groups in SiDETA. 40,41 The characteristic amine stretching mode of 165 Ho-SiDETA shifted to a lower wavenumber as compared to the free SiDETA (3300 to 3170 cm −1 and 3370 to 3270 cm −1 ) (Fig.…”