A Room-Temperature Operation Formaldehyde Sensing Material Printed Using Blends of Reduced Graphene Oxide and Poly(methyl methacrylate)

Sensors

Wen-Jong Wu¹  Sung-Yuan Yang¹  Chih-Ting Lin²  Wen-Yu Chuang² 

[1]Department of Engineering Science and Ocean Engineering, National Taiwan University, Taipei 10617, Taiwan

[2]Graduate Institute of Electronics Engineering, National Taiwan University, Taipei 10617, Taiwan

关键词: RGO;    PMMA;    formaldehyde;    gas sensor;   

DOI  :  10.3390/s151128842

来源: DOAJ

【 摘 要 】

This work demonstrates a printable blending material, i.e., reduced graphene oxide (RGO) mixed with poly(methyl methacrylate) (PMMA), for formaldehyde sensing. Based on experimental results, 2% RGO/10% PMMA is an optimal ratio for formaldehyde detection, which produced a 30.5% resistance variation in response to 1000 ppm formaldehyde and high selectivity compared to different volatile organic compounds (VOCs), humidity, CO, and NO. The demonstrated detection limit is 100 ppm with 1.51% resistance variation. Characterization of the developed formaldehyde sensing material was performed by Fourier-transform infrared (FTIR) spectrometry, scanning electron microscopy (SEM), and Raman spectroscopy. Based on Raman spectroscopy, the basic sensing mechanism is the band distortion of RGO due to blending with PMMA and the adsorption of formaldehyde. This work establishes insights into the formaldehyde sensing mechanism and explores a potential printable sensing material for diverse applications.

【 授权许可】

Unknown