Surface functional groups and redox property of modified activated carbons

一系列激活的碳(交流) 与目的作为激活代理人用 HNO3， H2O2 和蒸气被准备在交流准备过程把功能的组介绍给碳表面。激活代理人，功能的组和交流的氧化还原作用性质被温度节目解吸附作用(TPD ) 描绘的表面上的激活时间和周期的 Voltammetry (CV ) 的集中的效果。结果证明交流的内酯组与组们与 HNO3 的集中增加的激活时间，和 carboxyl 由 HNO3 增加激活。交流的羰基 / 奎宁组与激活时间和 H2O2 的集中由 H2O2 增加激活，尽管酸的组与 H2O2 的集中减少。CV 在 0 和 0.5 V 反映的氧化还原作用性质与功能的组由 TPD 描绘了的任何种氧是不同的，但是它与 SO2 催化氧化 / 氧化性质由 TPR 显示了一致。

A series of activated carbons（ACs） were prepared using HNO_3,H_2O_2 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 HNO_3 increase with activation time,and the carboxyl groups increase with the concentration of HNO_3.Carbonyl/quinine groups of ACs activated by H_2O_2 increase with the activation time and the concentration of H_2O_2,although the acidic groups decrease with the concentration of H_2O_2.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 SO_2 catalytic oxidization /oxidation properties indicated by TPR.