Hydrothermal routes to prepare nanocrystalline mesoporous SnO2 having high thermal stability

Langmuir : the ACS Journal of Surfaces and Colloids
Shinobu FujiharaSae-Hoon Kim

Abstract

We report simple hydrothermal routes to prepare thermally stable SnO2 particles having high specific surface areas and mesoporosity. The preparation method includes a new combination of synthetic processes: hydrolysis of tin(IV) chloride at 95 degrees C in the absence of alkaline solutions (aqueous NH3 or NaOH), formation of nanocrystalline SnO2, and subsequent hydrothermal treatments at temperatures between 100 and 200 degrees C. After annealing treatments of the hydrothermally treated SnO2 particles at 400 or 500 degrees C, their crystallite sizes remained smaller than 7.7 nm and their specific surface areas were still higher than 110 m2/g, indicative of the high thermal stability against particle growth and sintering. Furthermore, mesoporosity evolved with a relatively narrow pore size distribution typically in the range of 3.0-4.3 nm. The effects of the hydrothermal treatment were explained by uniformization of the particle size that was beneficial to the suppression of particle growth.

Citations

Oct 5, 2011·Environmental Science & Technology·Guandao Gao, Chad D Vecitis
Jun 14, 2012·Journal of the American Chemical Society·Antoine de KergommeauxPeter Reiss
Mar 19, 2014·ACS Applied Materials & Interfaces·Koichi SuematsuKengo Shimanoe
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Jun 22, 2007·Langmuir : the ACS Journal of Surfaces and Colloids·Qun DongNa Wang
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