Cotton-like Fe^sub 2^O3 anchored on graphene sheets for improved NO2 sensing at room temperature

• Published in: Journal of materials science. Materials in electronics Vol. 26; no. 7; p. 5024
• Main Authors: Wang, Yumei, Gong, Siying
• Format: Journal Article
• Language: English
• Published: New York Springer Nature B.V 01.07.2015
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-015-3019-y

Issue Title: Special Issue: 25th Anniversary Issue; Editors: Arthur Willoughby, Safa Kasap In this work, cotton-like Fe^sub 2^O3-reduced graphene oxide (rGO) composites were synthesized by a one-step microwave-assisted hydrothermal method, using ferrous sulfate (FeSO^sub 4^) precursor in graphene oxide (GO) solution. The as-obtained products were characterized by X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), and Fourier-transform infrared (FT-IR) spectra. The results indicated that the cotton-like Fe^sub 2^O3 was successfully anchored on graphene sheets with a homogeneous distribution. To demonstrate the potential applications, the sensor was fabricated by using the cotton-like Fe^sub 2^O3-rGO composites for detection of NO2 at room temperature. The testing results demonstrate that the sensor exhibited an excellent selectivity and a significant response to NO2 with a concentration lower to 1 ppm. The present study may serve as a facile and green approach for preparing graphene materials modified with metal oxides to improve their sensing performances.