Eu-doped ZnSnO3 nanoblocks for detecting isopropanol with high gas sensitive performance

In this paper, a series of Eu-doped ZnSnO 3 nanoblocks are prepared through one-step hydrothermal method. The structure and morphology of Eu-ZnSnO 3 nanoblocks are characterised using SEM,XRD, XPS and TEM tests. The gas-sensitive properties of Eu-ZnSnO 3 nanoblocks towards isopropanol are explored. Compared with pure ZnSnO 3 , the response of 4 % Eu-ZnSnO 3 sensor is enhanced nearly three times. The response recovery time was greatly improved by Eu doping, and the 4 % Eu-ZnSnO 3 sensor showed a recovery time of only 8/10s for 100 ppm isopropanol at 260 °C, which is a 2.9-fold reduction in recovery time. The catalytic effect of Eu and n-n heterojunction structure of Eu 2 O 3 -ZnSnO 3 all contribute to enhance the gas response. The results prove that the Eu-ZnSnO 3 nanoblocks have great potential for the detection of isopropanol.