Preparation of 2-Butanone Gas Sensor Based on Ag-Decorated In2O3 Nanocube with High Response and Low Detection Level

In this work, 2-butanone-sensitive Ag-decorated In2O3 nanocomposites were successfully prepared using a facile one-step hydrothermal method to enhance the sensing performance of nanocubes. The methods scanning electron microscopy (SEM), transmission (TEM), high-resolution (HRTEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) analysis, and photoelectron (XPS) used observe morphology, microstructure, crystalline phase, existing state elements in produced nanomaterials, respectively. gas test results show that compounds could respond 100 ppm 2-butanone with high response (242), fourfold pure material, at optimum working temperature 240 °C. Moreover, Ag@In2O3-based sensor also showed excellent selectivity, good repeatability, even long-term stability. addition, noble metal surface modification not only decreased operating (from 270 °C °C) but lowest detection limit 5 0.25 ppm). final section, mechanism probable reason for 2-butanone’s enhanced properties are both discussed.