Nanostructured metal oxide heterojunctions for chemiresistive gas sensors

Abstract

Metal oxides have been extensively used in environmental monitoring, breath analysis, and food quality assessment. This review summarizes the effects of nanoscale heterojunctions on enhancing the gas-sensing performance of metal oxide devices.

Synergy of W doping and oxygen vacancy engineering on d-band center modulation for enhanced gas sensing performance

“…8,9 Semiconductor metal oxide (SMO) nanostructures have been widely considered to be suitable sensing materials for the detection of volatile organic compounds (VOCs) due to their inexpensive preparation, tunable structure, and distinct surface and interfacial properties. 10 However, their practical implementation is signicantly limited by some common limitations, such as high operating temperatures (>200 °C), low sensitivity, and/or insufficient selectivity. Efficient strategies for the synthesis of gas sensing materials are urgently needed to provide effective solutions.…”