(1. Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, China) (2. College of Chemistry and Chemical Engineering, Taiyuan University of Technology, Taiyuan 030024, China) (3. College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China)
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Abstract:
Carbon microspheres (CMSs) were modified to improve their surface activity using different oxidant systems under ultraviolet (UV) irradiation. The morphologies of all samples were characterized by field emission scanning electron microscopy, and the functional groups introduced onto the surface of CMSs were analyzed qualitatively and quantitatively by Fourier transformation infrared spectrometry, thermogravimetry, Xray photoelectronic spectrometry and acidbase titration. The dispersion of oxidized CMSs in ethanol was also observed. The results show that oxygencontaining groups were introduced onto the surface of CMSs in the three oxidative systems (H2O2, H2O2/HNO3, H2O2/H2SO4) under UV irradiation. The CMSs oxidized by UV/H2O2+H2SO4 showed the most amounts of oxygencontaining groups, which give a efficient method to oxidize carbon materials.