Preparation and Characterization of Highly Spherical Silica-titania Aerogel Beads with High Surface Area
The silica-titania aerogel beads were synthesized through sol-gel reaction followed by supercritical drying, in which TEOS and TBT as co-precursors, EtOH as solvents, HAC and NH<sub>3</sub>·H<sub>2</sub>O as catalysts. The as-prepared aerogel beads were characterized...
| Main Authors: | , |
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| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2017-02-01
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| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/Y2017/V45/I2/7 |
| Summary: | The silica-titania aerogel beads were synthesized through sol-gel reaction followed by supercritical drying, in which TEOS and TBT as co-precursors, EtOH as solvents, HAC and NH<sub>3</sub>·H<sub>2</sub>O as catalysts. The as-prepared aerogel beads were characterized by SEM,TEM,XRD,FT-IR,TG-DTA and nitrogen adsorption-desorption. The results indicate that the diameter distribution of beads are between 1-8mm, the average diameter of beads is 3.5mm. The aerogel beads have nanoporous network structure with high specific surface area of 914.5m<sup>2</sup>/g, and the TiO<sub>2</sub> particles are distributed in the aerogel uniformly, which keep the anatase crystal under high temperature. |
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| ISSN: | 1001-4381 1001-4381 |