Porous single-crystalline titanium dioxide at 2 cm scale delivering enhanced photoelectrochemical performance

被引：44
作者：
Cheng, Fangyuan [1 ,2 ]
Lin, Guoming [1 ,2 ]
Hu, Xiuli [1 ,2 ]
Xi, Shaobo [1 ,2 ]
Xie, Kui [1 ,2 ]
机构：
[1] Chinese Acad Sci, Fujian Inst Res Struct oMatter, CAS Key Lab Design & Assembly Funct Nanostruct, Fuzhou 350002, Fujian, Peoples R China
[2] Chinese Acad Sci, Fujian Inst Res Struct oMatter, Fujian Prov Key Lab Nanomat, Fuzhou 350002, Fujian, Peoples R China
来源：
NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期
关键词：
ANATASE TIO2; BENZENE; OXIDATION; EFFICIENT; PHENOL; PHOTOCATALYSIS; PHOTOANODES; EXCITATION; ABSORPTION; GENERATION;
D O I：
10.1038/s41467-019-11623-w
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Porous single-crystalline (P-SC) titanium dioxide in large size would significantly enhance their photoelectrochemical functionalities owing to the structural coherence and large surface area. Here we show the growth of P-SC anatase titanium dioxide on an 2 cm scale through a conceptually different lattice reconstruction strategy by direct removal of K/P from KTiOPO4 lattice leaving the open Ti-O skeleton simultaneously recrystallizing into titanium dioxide. The (101) facet dominates the growth of titanium dioxide while the relative titanium densities on different parent crystal facets control the microstructures. Crystal growth in reducing atmospheres produces P-SC TinO2n-1 (n = 7 similar to 38) in magneli phases with enhanced visible-infrared light absorption and conductivity. The P-SC TinO2n-1 shows enhanced exciton lifetime and charge mobility. The P-SC TinO2n-1 boosts photoelectrochemical oxidation of benzene to phenol with P-SC Ti9O17 showing 60.1% benzene conversion and 99.6% phenol selectivity at room temperature which is the highest so far to the best of our knowledge.
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页数：9
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