活性炭担体表面改性实验研究  

Research on the Surface Modification of Activated Carbon Carriers

作　　者：钟正坤[1] 孙颖[1] 陈银亮[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《原子能科学技术》2004年第z1期154-157,174,共5页Atomic Energy Science and Technology

基　　金：中国工程物理研究院科学技术基金资助课题(20030867)

摘　　要：采用气化处理和浓HNO3表面氧化法进行活性炭担体(AC)表面改性的实验研究,并对改性前后的AC样品进行红外光谱分析、热解吸实验和BET比表面积测量。实验结果表明:采用气化和浓HNO3表面氧化均可在AC表面引入氧原子,形成更多表面含氧基团;浓HNO3表面氧化使AC增重,气化使AC失重,气化还能引起AC的比表面积增大和表面微孔结构变化。Activated carbon carriers were gasified with a gas flow of 5%O_(2)+N_(2) in the range of 385～425 ℃ and oxidized with concentrated HNO_(3) under controlled conditions. Characterization of the surface chemical functional groups by infrared spectroscopy and temperature-programmed desorption (TPD) suggests that both the gasification and concentrated HNO_(3) oxidation could introduce oxygen atoms to the carbon surface and then increase its surface oxygen functional groups. Additionally, nitrogen adsorption isotherms at 77 K and the results from TPD indicate that the gasification increases the micropore volume and probably change the mesopore surface structure.

关 键 词：活性炭担体 表面改性 表面基团分析 热解吸 

分 类 号：TL278[核科学技术—核燃料循环与材料] TQ131.11[化学工程—无机化工]