Preparation method of N and O co-doped carbon coated In2S3 ultrathin nanosheet assembled dandelion-like microsphere photocatalyst

The invention discloses a preparation method of dandelion-like microspheres (N, O-C/In2S3 DP) which are assembled by N, O co-doped carbon coated In2S3 ultrathin nanosheets, and relates to a preparation method of the dandelion-like microspheres (N, O-C/In2S3 DP). According to the method, a coordination compound In (pydc) 2 with a layered structure is taken as a precursor, L-cysteine is taken as a vulcanizing agent and a structure regulator, and N, O-C/In2S3 DP with a unique component structure is prepared through a dissociation-assembly-carbonization process. The specific process of dissociation-assembly-carbonization comprises the steps that sulfydryl (-SH) of L-cysteine is combined with In ions of In (pydc) 2, a carbon chain (-CH2CHNH2COOH) of the L-cysteine is inserted into the interlayer of In (pydc) 2, a layered structure of an In (pydc) 2 precursor is dissociated, ultrathin nanosheets obtained through dissociation are assembled into microspheres of a three-dimensional multi-stage structure, finally high-