Dependence of the "solubility" of oxidized carbon nanomaterials on the acidity of aqueous solutions

作者：Hoo Van Nguyen^*; Tun Naing Min; Kryukov A Yu; Izvol'skii I M; Rakov E G

来源：Russian Journal of Physical Chemistry, 2014, 88(9): 1559-1563.

DOI：10.1134/S0036024414090192

• carbon nanotubes
• graphite oxide
• graphene oxide

The "solubility" of oxidized carbon nanotubes depends on the acidity of aqueous solutions and increases drastically when pH increases from 1 (when it is almost zero) to 2. The same behavior is inherent in graphite and graphene oxides, the only difference lying in smoother increase in the solubility and in a wider range of pH. The reason for the change in solubility was shown to be cleavage of hydrogen bonds between the carboxyl groups of different particles and the behavior of the oxidized fragments (oxidation debris). It was concluded that the character of the dependences was dictated by the different geometries of nanoparticles and different distributions of carboxyl groups on their surface.

• 出版日期2014-9
• 单位北京化工大学