Study on the influence of the macerals in Shenfu coals modified by acetone under photocatalysis on wettability

The effect of the modification with acetone under photocatalysis on the surface of macerals was studied, which aimd to find the method to enlarge the difference of the surface wettability of macerals. The influence of the modification time on the surface wettability and structure of Shenfu fusain and vitrain was researched. The results showed that the modification could obviouly change the surface properties of macerals. There was the biggest difference of wettability between Shenfu fusain and vitrain under the modification for 3min. The mainly changing surface groups in the modification process were C－O, C=O, COO－, etc. Moreover, the change of the contents of C=O and COO－ on the surface of Shenfu fusain were more obviously than Shenfu vitrain.