Near-UV light assisted green reduction of graphene oxide films through l-ascorbic acid

International Journal of Smart and Nano Materials

卷:12

Ulises Martinez¹  Tommy Rockward¹  Anabel Renteria²  Jaime Regis²  Andrea Irigoyen²  Sebastian Vargas²  Luis C. Delfin²  Yirong Lin²  Jose L. Bañuelos²  Elsa Bramasco-Rivera² 

[1] Los Alamos National Laboratory;

[2] The University of Texas at El Paso;

关键词: graphene oxide films;    green reduction;    near ultraviolet light;    l-ascorbic acid;    wide-angle x-ray scattering;   

DOI  :  10.1080/19475411.2021.1887396

来源: DOAJ

【 摘 要 】

Recent studies have highlighted the effects of various stimuli on the chemical reduction of graphene oxide (GO) through green reductant L-ascorbic acid (L-AA); however, the combination of near ultraviolet (NUV) light to increase the reduction rate has yet to be thoroughly explored. In this study, drop-casted GO films were subjected to chemical reduction through L-AA with various levels of exposure under 405 nm NUV radiation. The structure and uniformity of GO stackings that form the film were characterized through scanning electron microscopy (SEM) and wide-angle x-ray scattering (WAXS). Additionally, WAXS was used to track the removal of oxygen-containing functional groups along with Fourier-transform infrared (FT-IR) spectroscopy and x-ray photoelectron spectroscopy (XPS) as a function of L-AA and NUV light exposure times. XPS results demonstrated that the interaction between L-AA and NUV exposure has a significant effect on the reduction of films. Furthermore, the results that yielded the highest reduction (C-C bond concentration of 60.7%) were the longest L-AA and NUV light exposure times (48 hours and 3 hours, respectively). This report provides a study on the effects of NUV on the green reduction of GO films through L-AA with potential application in solar energy and chemical sensing applications.

【 授权许可】

Unknown