Jiangnan University

Lifeng Chi

Gang Shi

Caihua Ni

Ying Li

Dawei Wang

Fei He

Nan Lv

The invention relates to a three-dimensional bionic composite material based on refection elimination and double-layer P/N heterojunctions. The preparation method of the composite material comprises: (1) anisotropically etching a silicon wafer with an alkaline solution, to form compactly arranged tetragonal pyramids on the surface of the silicon wafer; (2) performing hydrophilic treatment on the silicon wafer, growing TiO2 crystal seeds on the surface of the silicon wafer, and calcining the silicon wafer in a muffle furnace; (3) putting the silicon wafer obtained in the step (2) into a reaction kettle, and growing TiO2 nano-rods on the side walls of silicon cones by a hydrothermal synthesis method; and (4) depositing PPY nano-particles on the TiO2 nano-rods. The composite material has good refection elimination performance and efficient photogenerated charge separation capability, and is applicable in fields of photo-catalysis, photoelectric conversion devices, solar cells and the like.

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Wuxi, China

Lifeng Chi