Preparation method of dye-sensitized metal sulfide semiconductor nanomaterial

The invention discloses a preparation method of a dye-sensitized metal sulfide semiconductor nanomaterial, belonging to the technical field of preparation of composite semiconductor materials. Aiming at the defects of the traditional hydrothermal method, an in-situ method and the like, the preparation method comprises the following steps of: introducing metal elements of a composite semiconductor into a hydrotalcite laminate according to adjustability and ion exchangeability of composition and structure of the hydrotalcite laminate; performing reversion; performing alkaline liquid etching; loading dye; and adjusting the molar ratio of the metal elements of the laminate to prepare the dye-sensitized porous ZnCdS composite semiconductor nanomaterial with modulated grain size, composition and band gap value and different Zn/Cd ratio. The prepared dye-sensitized composite semiconductor nanomaterial can optically degrade rhodamine-B molecules in the aqueous solution under the condition of visible light irradiation