Manganese oxide nanosheets and a 2D hybrid of graphene-manganese oxide nanosheets synthesized by liquid-phase exfoliation

摘要

Manganese oxide nanosheets were synthesized using liquid phase exfoliationthat achieved suspensions in isopropanol with concentrations of up to 0.45mg/ml. A study of solubility parameters showed that the exfoliation was optimumin DMF followed by isopropanol and diethylene glycol. Isopropanol was thesolvent of choice due to its environmentally friendly nature and ease of usefor further processing. The 2D hybrid was synthesized in isopropanolsuspensions with concentrations of up to 0.5 mg/ml and demonstrated stabilityagainst reaggregation for up to six months. The coexfoliation was found to bean energetically favorable process in which both solutes, graphene andmanganese oxide nanosheets, exfoliate with an improved yield as compared to thesingle solute exfoliation procedure. This work demonstrates the remarkableversatility of liquid phase exfoliation with respect to the synthesis ofhybrids with tailored properties, and it provides proof of concept ground workfor further future investigation and exploitation of hybrids made of two ormore 2D nanomaterials that have key complementary properties for varioustechnological applications.