A topotactic tailored synthesis of waxberry-like mixed-phase TiO_(2) hollow spheres for dye-sensitized solar cells  

作　　者：Yang-Hong Wu Kai-Yan Yuan Yan-E He Heng Wu Li-Jiao Ma Gang Wang Xiao-Dong Qiao Bing-Xin Lei Zhen-Fan Sun Zhao-Qing Liu 

机构地区：[1]School of Chemistry and Chemical Engineering,Key Laboratory of Electrochemical Energy Storage and Energy Conversion of Hainan Province,Key Laboratory of Electrochemical Energy Storage and Light Energy Conversion Materials of Haikou City,Hainan Normal University,Haikou 571158,China [2]School of Chemistry and Chemical Engineering/Institute of Clean Energy and Materials/Guangzhou Key Laboratory for Clean Energy and Materials/Huangpu Hydrogen Innovation Center,Guangzhou University,Guangzhou 510006,China

出　　处：《Chinese Chemical Letters》2022年第2期963-967,共5页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (No.21965013);the Natural Science Foundation of Hainan Province (No.220RC590);the Graduate Student Research and Innovation Program of Hainan Province (No.hsyx2019-17)。

摘　　要：The waxberry-like mixed-phase TiO_(2)hollow microstructures (WMTHMs) are controllably prepared via a topotactic synthetic method,involving the synthesis of monodispersed Ca TiO_(2)precursors by a solvothermal method and subsequently transforming them into TiO_(2)through a Na_(2)EDTA-assisted ion-exchange process.The ratio of anatase-rutile is adjustable,and the two phases are connected well with each other.WMTHMs are composed of radially aligned nanorods,speeding up the electron transport.The optimum WMTHMs sample shows a specific surface area of 68.05 m^(2)/g and exhibits an excellent light scattering capacity.The cell based on WMTHMs light scattering layer obtained an optimal efficiency of 9.12%.The improvement of cell efficiency is mainly attributed to the high specific surface area,the efficient light scattering,the appropriate ratio of anatase-rutile,the staggered bandgap structure,and the convenient one-dimensional electron transport channel.

关 键 词：Titanium dioxide Phase composition Topotactic methodology Hollow sphere Dye-sensitized solar cell 

分 类 号：TQ134.11[化学工程—无机化工] TM914.4[电气工程—电力电子与电力传动]