Abstract
The effect of secondary (diethanolamine) and tertiary (triethanolamine) alkanolamines as catalysts on the formation of mesoporous Stöber silica nanoparticles by sol–gel method was studied. The particles were characterized by thermogravimetry and differential thermal analysis, Fourier transform infrared spectroscopy, N2 physisorption measurements, and field emission scanning electron microscopy. By using ammonia and different alkanolamines as catalysts, the Brunauer–Emmet–Teller (BET) surface area and pore volume increased in the order of ammonia < diethanolamine < triethanolamine. A maximum BET surface area of 140.1 m2 g−1 and pore volume of 0.66 cm3 g−1 were obtained from triethanolamine catalyzed silica particles. The average particle size of silica prepared by ammonia and different alkanolamines as catalysts decreased in the order of ammonia > diethanolamine > triethanolamine. The role of different alkanolamines on the textural properties and particle size of silica is explained in terms of their relative steric hindrance and basicity.
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Acknowledgments
The authors would like to thank the Director of this Institute for his kind permission to publish this paper. One of the authors (S. Nandy) is thankful to UGC for her fellowship. The financial support from CSIR, New Delhi in the Project No. CERMESA-ESC-0104 is also thankfully acknowledged.
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Nandy, S., Kundu, D. & Naskar, M.K. Synthesis of mesoporous Stöber silica nanoparticles: the effect of secondary and tertiary alkanolamines. J Sol-Gel Sci Technol 72, 49–55 (2014). https://doi.org/10.1007/s10971-014-3420-7
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DOI: https://doi.org/10.1007/s10971-014-3420-7