Synthesis of Hollow Mesoporous Silica Nanospheroids with O/W Emulsion and Al(III) Incorporation and Its Catalytic Activity for the Synthesis of 5-HMF from Carbohydrates

Controlling the particle size as well porosity and shape of silica nanoparticles is always a big challenge while tuning their properties. Here, we designed cost-effective, novel, green synthetic method for preparation perforated hollow mesoporous (PHMS-1) using very minute amount cationic surfactant in o/w-type (castor oil water) emulsion at room temperature. The grafting Al(III) through post-synthetic modification onto this framework (PHMS-2, Si/Al ~20 atomic percentage) makes efficient solid acid catalyst conversion monosaccharides to 5-HMF. Brunauer–Emmett–Teller (BET) surface area pure Al-doped (MSNs) were found be 866 660 m2g?1, respectively. Powder XRD, BET TEM images confirm mesoporosity these materials. Again, morphology was investigated scanning electron microscopic analysis. MSNs tested catalytic-biomass reactions. Our results show that PHMS-2 has much higher catalytic efficiency than contemporary aluminosilicate frameworks (83.7% 5-HMF yield 25 min 160 °C fructose under microwave irradiation).