Unique SnO2 triple-shelled hollow cages with a well-defined cubic shape have been successfully prepared via additional deposition of polycrystalline SnO2 on hybrid Zn2SnO4/SnO2 double-shelled nanotemplates followed by removal of Zn2SnO4. Structural characterization demonstrates that SnO2 triple-shelled hollow cubes (THCs) are hierarchically composed of numerous primary nanoparticles with a size of about several nanometers. The synthetic step-dependent multilayered evolution mechanism can be addressed in terms of different hollowing strategies. Based on the unique less-agglomerated multilayered and porous configuration, the gas sensing performances of SnO2 THCs exhibit an obvious improvement of response and shortened response-recovery characteristics at their optimal working temperature, compared with those of referenced single- and double-shelled SnO2 nanostructures.

中文翻译：

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将杂化双壳笼子的内外翻式奥斯特瓦尔德熟化成SnO2三壳空心立方体，以改善甲苯的检测。

通过在多晶Zn2SnO4 / SnO2双壳纳米模板上另外沉积多晶SnO2，然后去除Zn2SnO4，已成功制备了具有明确定义的立方形状的独特SnO2三壳空心笼。结构表征表明，SnO2三层空心立方体（THC）由许多大小约为几纳米的初级纳米颗粒分层组成。可以根据不同的挖空策略解决合成的依赖于阶跃的多层演化机制。基于独特的较少聚集的多层多孔结构，SnO2 THC的气敏性能在其最佳工作温度下表现出明显的响应改善和缩短的响应恢复特性，