Template‐Free Synthesis and Growth Mechanism of Hollow Structure SnO2 and Fabrication of Core‐Shell SnO2@ZnO

Zinc oxide (ZnO) and tin oxide (SnO2) are widely used in gas sensors and photocatalysis owing to their wide bandgaps, high electron mobilities, and thermal stabilities. Herein, a hollow structure of SnO2 is synthesized without a template by varying the precursor concentration and synthesis time, and its growth mechanism is studied. In addition, a core‐shell structure fabricated with SnO2 and ZnO, which is the heterostructure formed between the two metal oxides, is synthesized to compensate for the inferior properties of SnO2. The hollow structure of tin oxide (SnO2) is synthesized without a template. The synthesis of the core‐shell structure forms the heterojunction between SnO2 and zinc oxide (ZnO). The junction between SnO2 and ZnO changes the charge transfer and interfacial effects on the surface of the material. This structure can be applied to the field of gas sensors and photocatalysts.