The preparation mechanism of solid surface catalytic materials to enhance electron mobility has not been systematically studied.Fly ash was modified by wet magnetic separation,high energy ball milling and plasma discharge to improve the material's electron mobility,and the preparation mechanism was discussed.The experimental results show that the optimal combination of experimental parameters is magnetic separation with 1.2 T magnetic rod for 3 times,then ball milling at 550 r/min for 30 h,and finally plasma discharge modifica-tion under the conditions of discharge gap 3 mm,discharge length 200 mm,discharge power 130 W and modifi-cation time 20 min.The resistivity of the obtained fly ash sample is reduced to 27.92 MΩ·cm,which is four or-ders of magnitude higher than that of the original fly ash.This study shows that a perfect and continuous con-ductive network is a prerequisite for improving the conductivity and electron mobility of materials.
关键词
粉煤灰/高电子迁移率/催化材料/导电性/制备机理
Key words
fly ash/high electron mobility/catalytic material/conductivity/preparation mechanism
维普
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