国产日产欧美精品-亚洲国产综合久久精品-色综合色国产热无码一-亚洲欧美日本国产,免费观看一区二区三区_在线观看片A免费不卡观看_亚洲а∨天堂久久精品_99久无码中文字幕一本久道

 

作者： Jing Sun, Lian Gao

The State Key Laboratory on High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Ding Xi Road, Shanghai 200050, PR China

 

摘要： The surface properties of carbon nanotubes have been changed by heat treatment with ammonia to yield a basic surface or with N2 to yield an acidic surface without destroying the integrity of the nanotubes. The dispersion state of CNTs could be much improved by the adsorption of a cationic dispersant of poly(ethylenimine) (PEI) or an ionic dispersant of sodium dodecyl sulfate (SDS). Through the electrostatic interaction between components, CNTs could be successfully coated with particles of titania or alumina by colloidal heterocoagulation. A titania coating on 1.5wt% CNTs, shows the same photocatalytic properties in phenol degradation and has advantages in separation and reuse.

 

關鍵詞： A. Carbon nanotubes; B. Heat treatment; D. Reactivity