摘要
In this study,ZnO/In_(2)O_(3)-heterostructured nanosheets were prepared using a one-step hydrothermal method.The effects of ZnO content on the gas-sensing performance were discussed,with ZnO/In_(2)O_(3)-2 exhibiting the highest performance among the prepared sensors.The response of ZnO/In_(2)O_(3)-2 to n-butanol was 302 at 26℃,which was 11.93 times higher than that of pure In_(2)O_(3).Among the eight tested gases,ZnO/In_(2)O_(3)-2 displayed the highest response to n-butanol.Moreover,the lower detection limit of the ZnO/In_(2)O_(3)nanosheets was reduced from 10×10^(-6)to 0.1×10^(-6)(for pure In_(2)O_(3)nanosheets)toward n-butanol.This is because the doping of Zn2+increases the number of oxygen vacancies on the sensor surface and allows the formation of an n-n heterostructure between ZnO and In_(2)O_(3),which increases the initial resistance of the sensor.
基金
financially supported by the National R&D Program of China(No.2020YFB2008702)
the National Natural Science Foundation of China(Nos.62033002,61833006,62071112 and 61973058)
the 111 Project(No.B16009)
the Fundamental Research Funds for the Central Universities in China(Nos.N180408018,N2004019 and N2004028)
Liaoning Revitalization Talents Program(No.XLYC1807198)
Liaoning Province Natural Science Foundation(No.2020-KF-11-04)
Hebei Natural Science Foundation(No.F2020501040)。
