▎ 摘　　要

NOVELTY - Benzothiadiazolyl conjugated microporous polymer coated graphene polyheterojunction material (I) is new. USE - The benzothiadiazolyl conjugated microporous polymer coated graphene is useful in photo-electrochemical sensor for detecting levodopa. ADVANTAGE - The benzothiadiazolyl conjugated microporous polymer coated graphene has simple operation, small device, low cost, fast detection, and high sensitive identification. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: (1) the preparation method of the benzothiadiazolyl conjugated microporous polymer coated graphene the hetero structure material, involves adding bromine functionally reducing graphene oxide and dry dimethylformamide in the reaction container and mixing, then adding triethylamine, converting nitrogen for many times in a sealed environment; removing oxygen under the protection of nitrogen, then adding 1,3, 5-triethynylbenzene, 4,7-dibromo -1,2,3-bBenzothiadiazole, tetra triphenylphosphine palladium and cuprous iodide, under the sealed environment for converting nitrogen multiple times; and (2) a photo-electrochemical sensor comprises the modified benzothiadiazolyl conjugated microporous polymer on the graphene surface of the indium tin oxide (ITO) electrode.