Investigating the Effect of Ultrasonification Time on Transition from Monolithic Porous Network to Size-Tunable Monodispersed Silica Nanospheres via Stöber Method

Publish Year: 1397
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:

JR_ACERPT-4-2_006

تاریخ نمایه سازی: 23 مهر 1398

Abstract:

Abstract Uniform colloidal monodispersed silica nanoparticles were synthesized via stöber method using ammonia as a basic catalyst. Field Emission Scanning Electron Microscope (FESEM) was confirmed the homogeneous nanospheres. The decrease of TEOS concentration (0.067 to 0.012 mol L-1) and an increase of H2O concentration (3 to 14 mol L-1) at 14 mol L-1 NH3 fixed accelerated the rate of hydrolysis and condensation of [Si (OC2H5)4-X(OH)X]. Using EtOH solvent prevented the aggregation of micelle nuclei and formed spheres with the smallest variance in their size. Hence, the spherical particles were tuned in the range of 10-330 nm. Moreover, the decrement of the ultrasonic time could be changed the nanospheres morphology to the mesoporous structure.

Authors

Mahya Nangir

semiconductors, MERC

Abouzar Massoudi

Semiconductor, Merc

Seyed Ali Tayebifard

Semiconductors, MERC