Application of graphene oxide to the preparation of FePO₄·2H₂O composite precursor

Graphene/FePO₄·2H₂O composite precursors are prepared by homogeneous precipitation method with Fe (NO₃)₃·9H₂O, NaH₂PO₄·2H₂O and H₃PO₄, added in graphene oxide (GO).Results show that GO can change the morphology of FePO₄·2H₂O powders from flocculent to round.Then the round powders are concentrated by filtration, and raw materials are dropped in the products to make the powders re-grow.The final powders are spherical with homogeneous particle size (D₅₀=4.220 μm, the tap density is 1.31 g/m³).The analysis of XRD, FT-IR and Raman data shows that GO is mainly reduced to grapheme which has great value for the preparation of graphene/FePO₄·2H₂O composite precursor.