US 10,888,855 B2
Silicon-titanium dioxide-polypyrrole three-dimensional bionic composite material based on hierarchical assembly and use thereof
Gang Shi, Wuxi (CN); Ying Li, Wuxi (CN); Caihua Ni, Wuxi (CN); Dawei Wang, Wuxi (CN); Fei He, Wuxi (CN); Lifeng Chi, Wuxi (CN); and Nan Lv, Wuxi (CN)
Assigned to JIANGNAN UNIVERSITY, Wuxi (CN)
Appl. No. 15/748,760
Filed by JIANGNAN UNIVERSITY, Wuxi (CN)
PCT Filed May 12, 2016, PCT No. PCT/CN2016/081791
§ 371(c)(1), (2) Date Jan. 30, 2018,
PCT Pub. No. WO2017/113563, PCT Pub. Date Jul. 6, 2017.
Claims priority of application No. 2015 1 0994514 (CN), filed on Dec. 28, 2015.
Prior Publication US 2019/0009261 A1, Jan. 10, 2019
Int. Cl. B01J 35/00 (2006.01); H01L 51/42 (2006.01); H01L 21/306 (2006.01); B01J 21/06 (2006.01); B01J 31/38 (2006.01); B01J 37/02 (2006.01); H01L 51/00 (2006.01); C02F 1/72 (2006.01); C30B 29/06 (2006.01); C30B 29/16 (2006.01); C30B 29/58 (2006.01); C30B 29/66 (2006.01); C30B 7/10 (2006.01); C01G 23/053 (2006.01); C30B 29/60 (2006.01); C30B 29/32 (2006.01); B01J 31/06 (2006.01); C02F 1/32 (2006.01); B82Y 40/00 (2011.01); B82Y 30/00 (2011.01); C02F 101/30 (2006.01)
CPC B01J 35/0033 (2013.01) [B01J 21/06 (2013.01); B01J 21/063 (2013.01); B01J 31/06 (2013.01); B01J 35/004 (2013.01); B01J 35/0006 (2013.01); B01J 35/0013 (2013.01); B01J 37/0217 (2013.01); B01J 37/0228 (2013.01); B01J 37/0244 (2013.01); C01G 23/053 (2013.01); C30B 7/10 (2013.01); C30B 29/06 (2013.01); C30B 29/16 (2013.01); C30B 29/32 (2013.01); C30B 29/58 (2013.01); C30B 29/60 (2013.01); C30B 29/66 (2013.01); H01L 21/30608 (2013.01); H01L 51/0035 (2013.01); H01L 51/4213 (2013.01); H01L 51/4226 (2013.01); B01J 31/38 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C01P 2004/16 (2013.01); C01P 2004/62 (2013.01); C01P 2004/64 (2013.01); C02F 1/32 (2013.01); C02F 1/725 (2013.01); C02F 2101/308 (2013.01); C02F 2305/10 (2013.01); Y02W 10/37 (2015.05)] 10 Claims
 
1. A silicon-titanium dioxide-polypyrrole three-dimensional bionic composite material based on hierarchical assembly, comprising an ordered hierarchy (Si/TiO2/PPY) of monocrystalline silicon (Si), titanium dioxide (TiO2) and polypyrrole (PPY),
wherein Si is 100-type monocrystalline silicon with a tapered microstructure surface and is a P-type semiconductor, and has compactly arranged silicon cone structure of tetragonal pyramids with a height of 4-10 μm;
TiO2 is TiO2 nano-rods of rutile phase and is an N-type semiconductor, and is quadrangular with a height of 500-4000 nm and a diameter of 40-250 nm, and orderly and vertically grown on the side walls of the silicon cones;
PPY is polypyrrole nano-particles with a diameter of 10-60 nm and is a P-type semiconductor, and is uniformly grown on the surfaces of the TiO2 nano-rods;
in the Si/TiO2/PPY three-dimensional bionic composite material, double P/N heterojunctions are formed on interfaces between Si and TiO2 and between TiO2 and PPY, such that the composite material can efficiently separate photo-generated charges while having a three-dimensional bionic composite structure, and can effectively reduce the reflection of incident light on the surface.