ZnO/SnO2 Heterojunctions Sensors with UV-Enhanced Gas-Sensing Properties at Room Temperature

Luís F. da Silva, Mattia A. Lucchini, Jean-Claude M'Peko, Sandrine Bernardini, Khalifa Aguir, Caue Ribeiro, Elson Longo, Markus Niederberger
2017 Proceedings (MDPI)  
We report herein the efficiency of microwave-assisted synthesis for obtaining ZnO/SnO2 heterostructures for room-temperature gas-sensing applications. The sensing performances of the traditional oxide materials have been found for applications above 200 °C. However, these temperatures were here reduced to room temperature by considering sensing activity photoactivated by UV light, even for ppb ozone (O3) levels. The heterojunctions exhibited a fast response, total reversibility, and selectivity
more » ... ty, and selectivity to oxidizing gases, especially O3 gas. This investigation provides an efficient way to obtain heterostructures exhibiting remarkable properties for practical applications as O3 gas sensor devices.
doi:10.3390/proceedings1040418 fatcat:c2obfzzncvgivgyohblcvayf34