Patent ID: 11898083
Assignee: TIANJIN UNIVERSITY
Field: Organic fine chemistry (Chemistry)
Classification: CPC C  F  Y | IPC C  F

Claim 1:
2. A method for preparing the azobenzene-graphene metal coordination solar photothermal energy storage material of claim 1, the method comprising the following steps:
(1) preparing reduced graphene oxide: hydrothermally reacting an aqueous solution of graphene oxide (GO) prepared using Hummers method to obtain an aqueous solution of reduced graphene oxide (RGO);
(2) preparing an azobenzene-graphene material: preparing a hydrochloric acid solution of 4′-aminoazobenzene-4-sulphonic acid and a hydrochloric acid solution of NaNO2 respectively, adding the hydrochloric acid solution of NaNO2 dropwise into the hydrochloric acid solution of 4′-aminoazobenzene-4-sulphonic acid at 0-5° C. to form a diazonium salt; adding the diazonium salt into the aqueous solution of the reduced graphene oxide obtained in step (1) to react for a period of time; and washing the obtained product with water, NN-dimethylformamide (DMF) and ethanol until no characteristic absorption peak of azo appears in the UV absorption detection of the filtrate; and drying to obtain an azobenzene-graphene material; and
(3) preparing an azobenzene-graphene metal coordination solar photothermal energy storage material: dispersing the azobenzene-graphene material prepared in step (2) in DMF and dissolving an amount of a metal compound in DMF, adding the DMF solution of the metal compound into the DMF solution of the azobenzene-graphene, taking out the precipitate, washing off metal ions which do not participate in coordination, and drying the obtained product to obtain an azobenzene-graphene metal coordination solar photothermal energy storage material.