Biomorphic porous SnO₂ was hydrothermally synthesized at 160 °C and post-calcined at 550 °C using sorghum straw as biotemplate. The as-obtained tubular porous SnO₂ inherited the hierarchical microstructure of sorghum straw with a specific surface area of 28.6 m²·g⁻¹ and exhibits remarkable gas sensing performance. After surface modified by Pt nanoparticles, biomorphic SnO₂ shows excellent low-temperature hydrogen sensing characteristics with a high sensitivity of 18.2 for 200 ppm hydrogen at 50 °C, a short response time of 7 s and excellent selectivity, as a result of the synergism of the unique porous structure of biomorphic SnO₂ and the catalytic activity of the loaded Pt nanoparticles.

以高粱秸秆为生物模板，在160°C水热合成了生物形态多孔SnO ₂，并在550°C下进行了后煅烧。所得到的管状多孔SnO ₂继承了高粱秸秆的分级微观结构，比表面积为28.6 m ² ·g ^-1，并且显示出显着的气体感测性能。经过Pt纳米颗粒的表面改性后，由于协同作用，生物形态SnO ₂具有出色的低温氢感测特性，对200 ppm的氢气在50°C时具有18.2的高灵敏度，7 s的短响应时间和出色的选择性。形SnO ₂独特的多孔结构 以及负载的Pt纳米颗粒的催化活性。