Facile synthesis of layered V2O5/ZnV2O6 heterostructures with enhanced sensing performance.

A low-cost and environment-friendly hydrothermal approach was used for the synthesis of layered V 2 O 5 /ZnV 2 O 6 hybrid nanobelts. Characterization results indicate that the V 2 O 5 /ZnV 2 O 6 nanobelts are composed of several thin layers. Additionally, it is illustrated that the chemical formation process of V 2 O 5 /ZnV 2 O 6 occurred in the solution. The synthesized V 2 O 5 /ZnV 2 O 6 heterostructures were subjected to detailed ethanol sensing tests. Results demonstrate that V 2 O 5 /ZnV 2 O 6 based sensor shows about 4.3 of response to 100 ppm of ethanol gases, reveals relatively high sensitivity at relatively low optimal operating temperature of 240 °C, as well as relatively good selectivity and stability. The performance of the sensor is better than most of reported vanadium based sensing devices. Thus this work offers a new insight into the rational regulation of vanadium based sensing devices. [ABSTRACT FROM AUTHOR]