Preparation of mesoporous silica nanocapsules with a high specific surface area by hard and soft dual templating approach: Application to biomass valorization catalysis

2020 ◽  
Vol 306 ◽  
pp. 110400
Author(s):  
Tommy Haynes ◽  
Ouijdane Bougnouch ◽  
Vincent Dubois ◽  
Sophie Hermans
Keyword(s):  
Mesoporous Silica ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Biomass Valorization ◽  
Silica Nanocapsules

High specific surface area ordered mesoporous silica COK-12 with tailored pore size

2019 ◽  
Vol 280 ◽  
pp. 133-143 ◽  
Author(s):  
Laura M. Henning ◽  
Diego Díaz Cubas ◽  
Maria G. Colmenares ◽  
Johannes Schmidt ◽  
Maged F. Bekheet ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Specific Surface ◽  
Pore Size ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Ordered Mesoporous Silica ◽  
Ordered Mesoporous

scholarly journals High-quality mesoporous SiO2 nanospheres via a confined jet impingement continuous microchannel reactor

2021 ◽  
Author(s):  
Qiang Chen ◽  
Kai Chen ◽  
Feng Yu ◽  
Aixia Guo ◽  
Siqing Zou ◽  
...  
Keyword(s):  
Mesoporous Silica ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Particle Diameter ◽  
Jet Impingement ◽  
High Specific Surface Area ◽  
Lithium Silicate ◽  
Average Particle ◽  
Microchannel Reactor

Abstract High surface area mesoporous silica (SiO2) nanospheres has been considered an ideal material for the catalytic, adsorption and drug delivery. However, synthesis of ultra-high specific surface area mesoporous silica nanoparticles with well-defined sphere structure and small particle size (< 200 nm) is still challenging. Here, a two-stream confined jet impingement continuous microchannel reactor is proposed to produce novel mesoporous silica nanospheres (MSNs) with ultra-high specific surface area (SSA) and abundant worm-like meso-porosity. The as-obtained MSNs with worm-like mesoporous structure were produced with average particle diameter of 142 ~ 207 nm, high SSA of 1347 ~ 1854 m2/g, total pore volume of 0.86 ~ 1.23 cm3/g and pore diameter of 2.6 ~ 3.3nm. Moreover, the shear force field in the microchannel reactor on the mesoscopic structure of MSNs was simulated by mesoscopic kinetics. Additionally, MSNs was used as the silicon source to synthesize lithium silicate (Li4SiO4), which enhanced carbon dioxide (CO2) adsorption of 27.18 wt% at 650 ℃.

scholarly journals Preparation of spherical aminopropyl-functionalized MCM-41 and its application in removal of Pb(II) ion from aqueous solution

2019 ◽  
Vol 8 (1) ◽  
pp. 275-284 ◽  
Author(s):  
Yi Lin ◽  
Jinjia Xu ◽  
Bhosale Sanjana Sudhakar ◽  
Junjie Gu ◽  
Ruoyu Hong
Keyword(s):  
Aqueous Solution ◽  
Mesoporous Silica ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
High Specific Surface Area ◽  
Synthesis Methods ◽  
Silica Microspheres ◽  
Mesoporous Silica Microspheres ◽  
Mcm 41

Abstract Mesoporous silica microspheres were prepared by the polymerization-induced colloid aggregation (PICA) and pseudomorphic synthesis methods. The prepared microspheres have high specific surface area and MCM-41 type structure. In the PICA process, acidic silica sol was utilized as silica source and the effect of molar ration (formaldehyde/urea) was investigated. Moreover, the influences of reaction time and temperature were also studied. The specific surface area of porous and mesoporous silica microspheres were 186.4 m2/g and 900.4 m2/g, respectively. The materials were characterized by SAXS, FTIR, SEM, TEM and nitrogen sorption measurements. The prepared silica microspheres were functionalized by (3-Aminopropyl)triethoxysilane and then used to remove the lead from aqueous solution. The result indicates that the grafted silica microspheres have rapid adsorption capacity and good reproducibility. The adsorption data was fitted well with the Langmuir isotherm model, and the maximum adsorption capacities for MCM-41 silica microspheres were 102.7 mg/g.

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