Nitrogen enriched triazine bridged mesoporous organosilicas for CO₂ capture and dye adsorption applications

Triazine bridged mesoporous organosilicas with nitrogen content of up to 16.57 wt% have been synthesized by condensation of 3-aminopropyl triethoxysilane and cyanuric chloride followed by hydrolysis and co-condensation with variable amount of tetraethoxyorthosilicate in presence of CTABr. The specific surface area (SA_BET) of these materials varies in the range of 232 to 1304 m²/g depending upon the experimental conditions. The maximum SA_BET of 1304 m²/g was estimated in the sample NEPMO-8 that was synthesized at the APTES to TEOS ratio of 1:8. The CO₂ uptake of 11.6 wt% at 273 K and 1 bar, and methyl orange adsorption capacity of 1262 mg/g at pH = 7 have made this material an important adsorbent.