How to change the activity of photocatalyst by constructing z-type heterojunction system

It can change the activity of photocatalyst in the following ways: valence bond is dominant, interface interaction is precisely regulated, and layered branch structure is formed.

1, dominated by * * * valence bond: Construct a Z-type organic-inorganic hybrid heterojunction dominated by * * valence bond, provide "expressway" for charge transfer in the reaction, promote the separation of photogenerated electrons and holes, and improve the activity and stability of the system.

2. Precise regulation of interface interaction: By precisely regulating the interface interaction, an effective Z-scheme interface electron transfer channel is established, and there is a huge internal electric field in the channel, thus achieving efficient and stable photocatalytic hydrolysis of water, which is obviously superior to many reported g-C3N4-based photocatalysts.

3. Formation of layered dendritic structure: valence bond is formed between organic material HC-PDI and inorganic material ZnIn2S4, and at the same time, (? ) HC-PDI/(+)ZnIn2S4 has built-in electric field and Z heterojunction (HPZ), which not only promotes the transfer and separation of photogenerated charges, but also removes the water oxidation reaction in ZnIn2S4, thus improving the photocatalytic activity and stability of the system.