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[求助]
制備mpg-C3N4的問題 已有4人參與
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我采用如下方法,制備g-C3N4,經(jīng)過焙燒后,得到的是白色固體,可文獻上說得到的是黃色固體,怎么回事? 5 g of cyanamide and 12.5 g of Ludox-HSO4 silica dispersion are mixed together until complete dissolution of cyanamide. The mixture is heated in an oil bath at 100 oC upon stirring for ca .3h until removal of water and formation of a white solid. The powder is then grounded in a mortar, transferred into a crucible and heated under air at 2.3 oC min-1 (4h) up to 550 oC and then treated at 550 oC for 4h. The as-obtained yellow powder is grounded in a mortar and then treated under stirring during 2 days in a NH4HF2 4 mol L-1 solution. |


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