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A green approach for the reduction of graphene oxide by the ultraviolet/sulfite process
Yin, Ran; Shen, Ping; Lu, Zeyu
2019-08-15
Source PublicationJournal of Colloid and Interface Science
ISSN0021-9797
Volume550Pages:110-116
Abstract

This study highlights a green approach for the reduction of graphene oxide (GO) using the ultraviolet/sulfite advanced reduction process (UV/sulfite process). X-ray photoelectron spectroscopy (XPS) provided a strong evidence on the efficient reduction of GO by increasing the C/O ratio from 2.0 to 4.8, and the successful reduction was also characterized by UV–Vis, XRD and Raman spectrometry. The reduction of GO was attributed to the hydrated electrons generated from both sulfite photolysis (major, contributed by 71.4%) and GO photolysis (minor, contributed by 21.6%) under UV irradiation. The dissolved oxygen in water exhibited inhibitory effect on GO reduction through scavenging of the hydrated electrons. Moreover, the reduction efficiency of GO decreased with the increasing UV wavelength from 254 nm to 365 nm, because of the reduced molar absorptivity of sulfite at higher UV wavelength. By using this green photo-reduction method, high-purity of reduced graphene oxide can be easily obtained by water-rinse, since soluble sulfite are the only by-products. In conclusion, the research outcomes provide mechanistic insights on the GO reduction by the hydrated electron-based advanced reduction processes, which has great potential for the environmental-friendly and cost-effective reduction of GO.

KeywordAdvanced Reduction Process Graphene Oxide (Go) Hydrated Electron Uv/sulfite
DOI10.1016/j.jcis.2019.04.073
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaChemistry
WOS IDWOS:000469902400011
Scopus ID2-s2.0-85064932122
Fulltext Access
FWCI2.0374775
Citation statistics
Document TypeJournal article
CollectionPersonal research not belonging to the institution
Corresponding AuthorLu, Zeyu
AffiliationDepartment of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Kowloon, Clear Water Bay, Hong Kong
Recommended Citation
GB/T 7714
Yin, Ran,Shen, Ping,Lu, Zeyu. A green approach for the reduction of graphene oxide by the ultraviolet/sulfite process[J]. Journal of Colloid and Interface Science,2019,550:110-116.
APA Yin, Ran,Shen, Ping,&Lu, Zeyu.(2019).A green approach for the reduction of graphene oxide by the ultraviolet/sulfite process.Journal of Colloid and Interface Science,550,110-116.
MLA Yin, Ran,et al."A green approach for the reduction of graphene oxide by the ultraviolet/sulfite process".Journal of Colloid and Interface Science 550(2019):110-116.
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