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Liu, Yong; Che, Renchao; Chen, Gang; Fan, Jianwei; Sun, Zhenkun; Wu, Zhangxiong; Wang, Minghong; Li, Bin; Wei, Jing; Wei, Yong; Wang, Geng; Guan, Guozhen; Elzatahry, Ahmed A.; Bagabas, Abdulaziz A.; Al-Enizi, Abdullah M.; Deng, Yonghui; Peng, Huisheng; Zhao, Dongyuan
Science advances, 05/2015, Letnik: 1, Številka: 4Journal Article
Uniform mesoporous single-crystal TiO 2 spheres with radial channels from driving orientation assembly can be used for energy storage. Highly crystalline mesoporous materials with oriented configurations are in demand for high-performance energy conversion devices. We report a simple evaporation-driven oriented assembly method to synthesize three-dimensional open mesoporous TiO 2 microspheres with a diameter of ~800 nm, well-controlled radially oriented hexagonal mesochannels, and crystalline anatase walls. The mesoporous TiO 2 spheres have a large accessible surface area (112 m 2 /g), a large pore volume (0.164 cm 3 /g), and highly single-crystal–like anatase walls with dominant (101) exposed facets, making them ideal for conducting mesoscopic photoanode films. Dye-sensitized solar cells (DSSCs) based on the mesoporous TiO 2 microspheres and commercial dye N719 have a photoelectric conversion efficiency of up to 12.1%. This evaporation-driven approach can create opportunities for tailoring the orientation of inorganic building blocks in the assembly of various mesoporous materials.
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in: SICRIS
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