Silviana, S. published the artcileSynthesis of Aminopropyl-Functionalized Mesoporous Silica Derived from Geothermal Silica for an Effective Slow-Release Urea Carrier, Formula: C6H17NO3Si, the publication is Industrial & Engineering Chemistry Research (2022), 61(26), 9283-9299, database is CAplus.
An effective method to prepare slow-release urea was developed with aminopropyl-functionalized mesoporous silica (MS) to achieve enhanced urea adsorption and slow-release properties. As a novel study, mesoporous silica was developed using treated geothermal silica as the silica source, cetyltrimethylammonium bromide (CTAB) as the surfactant, and 3-aminopropyl trimethoxy silane (APTMS) as the surface modification agent. Mesoporous silica with the most desirable properties of uniform micromorphol. containing 38.55 wt % silica particles, 668.849 m2/g surface area, 149.33-353.28 mL/g adsorption-desorption range, and 0.26 mL/g adsorption pore volume was achieved using 0.05 mol of CTAB. The synthesized mesoporous silica showed type-IV hysteresis, which corresponds to mesoporous materials. Differential scanning calorimetry (DSC)-thermogravimetric anal. (TGA) thermograms showed that mesoporous silica is more reactive, with peaks at 82.3 and 159.5 ¡ãC, has good thermal stability, and undergoes only 17.61% weight loss until 124 ¡ãC. SEM (SEM) showed that functionalization and urea adsorption to mesoporous silica resulted in no significant morphol. changes. In the Fourier transform IR (FTIR) spectra, MS/APTMS/U26.74 was observed to have higher intensities of C=O, N-H, C-N, and C-H groups compared with other samples. The cumulative urea release during 7 days was 184.5 ppm (92.4%) for com. urea and 124.6 ppm (64.4%) for MS/APTMS/U26.74. The Higuchi kinetic model yielded the best fit predicting MS/APTMS/U26.74 release kinetics, with an R2 of 0.9979 and a Higuchi constant of 24.4964%/day. Finally, MS/APTMS/U26.74 synthesized using geothermal silica, CTAB, and APTMS was noted to possess a potential composition for slow-release urea with enhanced efficiency.
Industrial & Engineering Chemistry Research published new progress about 13822-56-5. 13822-56-5 belongs to catalysis-chemistry, auxiliary class Organic Silicones, name is 3-(Trimethoxysilyl)propan-1-amine, and the molecular formula is C10H16Br3N, Formula: C6H17NO3Si.
Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia