The purification method of the graphene oxide according to claim 1, wherein a solid content of the graphene oxide solution is 0.2- 0.5wt %.

The purification method according to claim 1, further comprising the following steps before the ion exchange purification: salting-out washing purification: A l, mixing the graphene oxide solution with a complexing agent solution and filtering to obtain a filter cake containing graphene; A2, continuously washing the filter cake with a complexing agent solution; A3, performing acid pickling and water washing on the filter cake washed by the complexing agent solution sequentially.

The purification method according to claim 1, further comprising the following steps after ion exchange purification: deep purification: purifying the graphene oxide solution obtained after ion exchange purification by electrodeionization.

The purification method according to any one of claims 1-8, wherein the purification method further comprises the step of drying the graphene oxide solution after the ion purification, the graphene oxide solution after the salting-out washing purification, or the graphene oxide solution after the deep purification to obtain a graphene oxide solid.

The purification method of the graphene oxide according to claim 1, wherein a solid content of the graphene oxide solution is 0.2- 0.5wt %.

The purification method according to claim 1, further comprising the following steps before the ion exchange purification: salting-out washing purification: A l, mixing the graphene oxide solution with a complexing agent solution and filtering to obtain a filter cake containing graphene; A2, continuously washing the filter cake with a complexing agent solution; A3, performing acid pickling and water washing on the filter cake washed by the complexing agent solution sequentially.

The purification method according to claim 1, further comprising the following steps after ion exchange purification: deep purification: purifying the graphene oxide solution obtained after ion exchange purification by electrodeionization.

The purification method according to any one of claims 1-8, wherein the purification method further comprises the step of drying the graphene oxide solution after the ion purification, the graphene oxide solution after the salting-out washing purification, or the graphene oxide solution after the deep purification to obtain a graphene oxide solid.

The purification method of the graphene oxide according to claim 1, wherein a solid content of the graphene oxide solution is 0.2- 0.5wt %.

The purification method according to claim 1, further comprising the following steps before the ion exchange purification: salting-out washing purification: A l, mixing the graphene oxide solution with a complexing agent solution and filtering to obtain a filter cake containing graphene; A2, continuously washing the filter cake with a complexing agent solution; A3, performing acid pickling and water washing on the filter cake washed by the complexing agent solution sequentially.

The purification method according to claim 1, further comprising the following steps after ion exchange purification: deep purification: purifying the graphene oxide solution obtained after ion exchange purification by electrodeionization.

The purification method according to any one of claims 1-8, wherein the purification method further comprises the step of drying the graphene oxide solution after the ion purification, the graphene oxide solution after the salting-out washing purification, or the graphene oxide solution after the deep purification to obtain a graphene oxide solid.

The purification method of the graphene oxide according to claim 1, wherein a solid content of the graphene oxide solution is 0.2- 0.5wt %.

The purification method according to claim 1, further comprising the following steps before the ion exchange purification: salting-out washing purification: A l, mixing the graphene oxide solution with a complexing agent solution and filtering to obtain a filter cake containing graphene; A2, continuously washing the filter cake with a complexing agent solution; A3, performing acid pickling and water washing on the filter cake washed by the complexing agent solution sequentially.

The purification method according to claim 1, further comprising the following steps after ion exchange purification: deep purification: purifying the graphene oxide solution obtained after ion exchange purification by electrodeionization.

The purification method according to any one of claims 1-8, wherein the purification method further comprises the step of drying the graphene oxide solution after the ion purification, the graphene oxide solution after the salting-out washing purification, or the graphene oxide solution after the deep purification to obtain a graphene oxide solid.