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Hydrothermal synthesis and characterization of mesoporous SnO2/SnO2–SiO2 on neutral template

✍ Scribed by Jie Zhu; B.Y. Tay; Jan Ma

Publisher
Elsevier Science
Year
2007
Tongue
English
Weight
786 KB
Volume
192-193
Category
Article
ISSN
0924-0136

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✦ Synopsis

Mesoporous SnO 2 /SnO 2 -SiO 2 with disordered pores and high thermal stability up to 600 • C were fabricated using hydrothermal treatment with/without impurity oxide (SiO 2 ) doping. Neutral surfactant (tetradecylamine, TDA) was selected as the structure directing agent based on a sol-gel-derived process. The results showed that with careful control of the synthesis condition, mesoporous SnO 2 -SiO 2 with small SnO 2 nanocrystallites (∼25 Å), large specific surface area (211-340 m 2 /g), and pore volume (0.23-0.3 cm 3 /g) could be obtained after the removal of template at temperatures of 400-600 • C. The effects of synthesis parameters such as aging time, hydrothermal treatment, Si/Sn molar ratio and calcination temperature were characterized by thermogravimetric analysis, wide/small-angle X-ray scattering (SAXS), HRTEM, and BET gas (N 2 ) adsorption/desorption measurements.

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