▎ 摘　　要

Dodecylamine (DDA) and ethylenediamine (EDA) functionalized graphene oxide (GO) nanosensors were synthesized by amidation methods and characterized by X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). The results showed that compared to pristine GO-based sensor, the DDA-GO and EDA-GO chemiresistors have a significant response to hydrogen sulfide (H2S) down to 50 ppm at room temperature. Furthermore, operating temperature effects, H2S concentration and GO suspension concentration on sensor response are also investigated. Functionalized graphene oxide chemiresistors offer advantages such as remarkable potential for mass production due to their ease of manufacturing, significant selectivity and performance. (C) 2015 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.