氧化石墨烯与氧化钴复合材料? To prepare GNS–Co 3 O 4 composite, 50 mg of Ex-GO was dispersed in 100 mL of water. To the above solution 10 mM of cobaltous nitrate (Co(NO 3 ) 2 ?6H 2 O) was added in drops under stirring. Subsequently 12 mM of urea was added to the mixture (to promote hydrolysis) and the solution was transferred to a 250 mL round bottom flask for heating at 120 ?C under refluxing for 6 h. Pink-black precipitate formed was separated using centrifuge and washed repeatedly with water and ethanol. Resultant powder was calcined in air at 400 ?C for 3 h to obtain GNS–Co 3 O 4 composite. 里面的Ex-GO是什么?GNS是 石墨烯 纳米材料吗?氧化石墨烯与 氧化钴 复合材 料可以进行光催化测定吗?如果可以的话,那是什么溶液???? 急需,谢谢!!! 查看更多2个回答 . 1人已关注