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. 2018 Aug 13;9:2128–2170. doi: 10.3762/bjnano.9.202

Figure 8.

Figure 8

(a) Schematic illustration of the processing steps for SnO2 NTs functionalized by bio-inspired catalysts (e.g., Pt-loaded SnO2 NTs and Au-loaded SnO2 NTs). SEM image of: (b) as-spun Sn precursor/PVP composite NFs; (c) SnO2 NFs after calcination at 600 °C for 1 h at 4 °C min−1 heating rate; (d) thin-walled SnO2 NTs at 10 °C min−1 heating rate; (e) Pt-loaded SnO2 NTs; and (f) cross-sectional Pt-loaded SnO2 NTs. (g) EDX elemental mapping of Pt-loaded SnO2 NTs. SEM image of: (h) Au-loaded SnO2 NTs and (i) cross-sectional Au-loaded SnO2 NTs. (j) EDX elemental mapping of Au-loaded SnO2 NTs; (k) dynamic acetone sensing transition in a concentration range of 1–5 ppm at 350 °C and (l) dynamic H2S sensing transition in a concentration range of 1–5 ppm at 300 °C. Reproduced with permission from [183], copyright 2015 Royal Society of Chemistry.