One-pot wet chemical synthesis of fluorine-containing TiO2 nanoparticles with enhanced photocatalytic activity. (January 2019)

• Record Type: Journal Article
• Authors: Lee, Duk-Hee; Swain, Basudev; Shin, Dongyoon; Ahn, Nak-Kyoon; Park, Jae-Ryang; Park, Kyung-Soo
• Is Part Of: Materials research bulletin. Volume 109(2019)
• Page Start: 227
• Page End: 232
• Publication Date: 2019-01
• Subjects: F-TiO2 -- Nanoparticles -- Wet-chemical synthesis -- Photocatalytic activity; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2018.09.027
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: F-containing TiO2 nanoparticles prepared by one-pot wet chemical methods show improved photocatalytic activity. Highlights: F-TiO2 nanoparticles were synthesized using simple wet chemical route. The produced F-TiO2 nanoparticles with tens of nanometers had a hierarchical structure. Photocatalytic activity of F-TiO2 showed the improved behavior compare with H-TiO2 . The possible mechanism for improved photocatalytic activity due to surface fluorine was discussed. Abstract: Two types of TiO2 nanoparticles: i) fluorine-containing TiO2 (F-TiO2 ) and ii) fluorine-free TiO2 (H-TiO2 ) nanoparticles, were prepared through a simple, scalable wet-chemical synthesis process, and a comparative study of their photocatalytic properties was conducted. This facile process begins with a one-pot precipitation process at 90 °C, followed by heat treatment at 600 °C for 1 h in air, resulting in hierarchical, sphere-like, mesoporous structures composed of primary nanoparticles. The microstructural features and crystallographic structures of both types of nanoparticles were systematically investigated by X-ray diffraction, thermogravimetric/differential thermal analysis, X-ray photoelectron spectroscopy, N2 physical adsorption-desorption, field emission scanning electron microscopy, and transmission electron microscopy analyses. The photocatalytic activities were also evaluated by measuring the degradation of MB. The F-TiO2 nanoparticles showed enhanced photocatalytic activity compared to H-TiO2, which can be attributed to adsorbed fluorine on the surface which leads to various positive effects on the photocatalytic degradation reactions.