Reactions of SO2 and NH3 with epoxy groups on the surface of graphite oxide powder

Wenjing Xie, Lu Tao Weng, Chak Keung Chan, King Lun Yeung, Chi Ming Chan

Research output: Contribution to journalArticlepeer-review

19 Scopus citations


Graphite oxide powder was obtained using the modified Hummers' method and characterized using X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS). The XPS results indicated that the epoxy groups were the main functional groups on the graphite oxide powder surface. The graphite oxide powder was then reacted with SO2 and NH3 gases, respectively, at 25 °C. The XPS and ToF-SIMS analyses of the surface of the reacted graphite oxide powder showed that the reactions mainly occurred in the epoxy groups. Bisulfate and amine groups were formed on the surface of the graphite oxide powder after the reactions between the graphite oxide powder and SO2 and NH3 gases. This work demonstrates a new method of removing SO2 and NH3 gases using graphite oxide powder.
Original languageEnglish (US)
Pages (from-to)6431-6439
Number of pages9
JournalPhysical Chemistry Chemical Physics
Issue number9
StatePublished - Jan 1 2018
Externally publishedYes

Bibliographical note

Generated from Scopus record by KAUST IRTS on 2023-07-06

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


Dive into the research topics of 'Reactions of SO2 and NH3 with epoxy groups on the surface of graphite oxide powder'. Together they form a unique fingerprint.

Cite this