Recent developments in metal oxide semiconductors for n-Butanol detection

In recent years, gas sensors have become increasingly used in various fields. In the detection of n-Butanol, metal oxide semiconductors, especially pure metal oxides, are the focus of research due to the ability to improve the gas-sensitive performance through the construction of special structures, doping, precious metal loading, heterojunctions, and other modifications. This review summarizes the results achieved over the past years concerning the modification of metal oxides and the improvement of their response, selectivity, operating temperature, and other properties. Particular attention is also paid to the gas-sensitive mechanisms. Finally, the bottlenecks of the current metal oxide semiconductor n-Butanol gas sensors are listed and the future development prospects are proposed as well.