Facile one-pot synthesis of surface-fluorinated TiO2 hollow spheres with enhanced photocatalytic activity

被引：5
|
作者：
Lee, Duk-Hee [1 ]
Park, Kyung-Soo [1 ]
Lee, Chan-Gi [1 ]
Swain, Basudev [1 ]
机构：
[1] Inst Adv Engn IAE, Mat Sci & Chem Engn Ctr, Yongin 17180, South Korea
来源：
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2020年 / 400卷
关键词：
Nano hollow sphere; Surface-fluorinated nano; F-doped TiO2; Photocatalysis; TEMPLATE-FREE FABRICATION; FREE ROUTE; NANOSTRUCTURES; RECONSTRUCTION; MICROSPHERES;
D O I：
10.1016/j.jphotochem.2020.112654
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Surface-fluorinated TiO2 hollow spheres were synthesized in a one-pot synthesis from dissolved ammonium hexafluorotitanate and boric acid without any surfactants or templates. The effect of reaction time on the morphology and structure of the synthesized sub-micro spheres was investigated and characterized by field emission scanning electron microscopy, high-resolution transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. Also, the detailed growth formation mechanism of hollow spheres via self-transformation and outward Ostwald ripening processes is discussed. The photocatalytic activity of the prepared samples was analyzed under ultraviolet light, based on the photocatalytic decomposition of rhodamine B aqueous solution at room temperature. A significant improvement in photocatalytic efficiency of the synthesized TiO2 hollow powder was observed, which was due to the combined effects of its high surface area, high crystallinity, and surface fluorination.
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页数：8
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