Abstract
We report the synthesis of mesoporous tin dioxide (SnO2) materials with well-defined particle morphology. The products consist of uniform spheres with a diameter of 5 mu m. The spheres are hierarchically porous with two distinct pore modes of 5.0 nm and 52 nm, respectively. This special porosity is the result of a synthesis procedure which involves a 'hard templating' (nanocasting) process. The product forms an approximately homogeneous monolayer of spheres on a sensor substrate and shows promising response to methane gas with low cross-sensitivity to water. The structural properties and gas-sensing performance are compared with a mesoporous SnO2 material without defined morphology, prepared by a 'soft templating' procedure. (C) 2011 Elsevier B.V. All rights reserved.
| Original language | Undefined/Unknown |
|---|---|
| Pages (from-to) | 483–488 |
| Number of pages | 6 |
| Journal | Sensors and Actuators B: Chemical |
| Volume | 155 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - 2011 |
| MoE publication type | A1 Journal article-refereed |
Keywords
- Gas sensor
- Mesoporous
- Nanocasting
- Nanoporous
- Tin dioxide