RSS for Surface functional groups and redox property of modified activated carbonshttp://academic.research.microsoft.com/Rss.aspx?cata=9&id=49651252Search RSS feed for Microsoft Academic SearchMSRA Libra RSS Burner(c)2008 Microsoft Corpration, All right reserved.Tue, 18 Jun 2013 06:07:20 GMTTue, 18 Jun 2013 06:07:20 GMTSurface functional groups and redox property of modified activated carbonshttp://academic.research.microsoft.com/Publication/49651252Mon, 17 Jun 2013 23:07:20 GMT496512520Zhang Xianglan, Deng Shengfu, Liu Qiong, Zhang Yan, Cheng Lei: view publication
A series of activated carbons (ACs) were prepared using HNO3, H2O2 and steam as activation agents with the aim to introduce functional groups to carbon surface in the ACs preparation process. The effects of concentration of activation agent, activation time on the surface functional groups and redox property of ACs were characterized by Temperature Program Desorption (TPD) and Cyclic Voltammetry (CV). Results showed that lactone groups of ACs activated by HNO3 increase with activation time, and the carboxyl groups increase with the concentration of HNO3. Carbonyl/quinine groups of ACs activated by H2O2 increase with the activation time and the concentration of H2O2, although the acidic groups decrease with the concentration of H2O2. The redox property reflected by CV at 0 and 0.5 V is different with any kinds of oxygen functional groups characterized by TPD, but it is consistent with the SO2 catalytic oxidization/oxidation properties indicated by TPR.
Journal: Mining Science and Technology (china), vol. 21, no. 2, pp. 181-184, 2011
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