Shape-controlled multi-dimensional In2O3/Mn2O3 p-n heterojunction for triethylamine detection

Due to the excellent properties, multi-dimensional p-n heterojunction materials are widely used in the field of gas sensing. In this work, In2O3-modified Mn2O3 nanorod was prepared by a hydrothermal method. The composites had excellent detection performance for triethylamine (TEA). The composites had rich 0D-1D multi-dimensional nanostructures. The sensing properties of composites with different In/Mn ratios were investigated by adjusting the proportion of Mn. The test results showed composite material had high re-sponse, excellent selectivity, ultra-high resistance stability and repeatability during repeated testing. High specific surface area, abundant active sites by the formation of multi-dimensional heterojunction, and Mn3+/Mn4+fast redox cycling of compound material made the excellent sensing performance. This work provided a reference for designing multi-dimensional heterostructures and high performance gas sensors.(c) 2023 Elsevier B.V. All rights reserved.

Automated summary

In this work, In2O3-modified Mn2O3 nanorod was prepared by a hydrothermal method, and the gas sensing performance of composites with different In/Mn ratios was investigated. The results showed that the composites exhibited high response, excellent selectivity, ultra-high resistance stability, and repeatability. This work provides a reference for designing multi-dimensional heterostructures and high-performance gas sensors.