Oxidative removal of rhodamine B over Ti-doped layered zinc hydroxide catalysts

Photodegradation efficiency of rhodamine B over Ti-Zn layered hydroxide catalyst uncalcined and calcined at 450°C for 2h under visible-light irradiation at room temperature [Display omitted] •The successful substitution of Zn2+ by Ti4+ in layered hydroxides.•Ti4+ in octahedral sites of hydroxide lay...

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Bibliographic Details
Published in:Journal of environmental chemical engineering 2016-12, Vol.4 (4), p.4012-4020
Main Authors: Thao, Nguyen Tien, Ly, Doan Thi Huong, Nga, Han Thi Phuong, Hoan, Dinh Minh
Format: Article
Language:English
Subjects:
Degradation
Layered hydroxide
Photocatalysis
Rhodamine B
Ti-doping
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Summary:Photodegradation efficiency of rhodamine B over Ti-Zn layered hydroxide catalyst uncalcined and calcined at 450°C for 2h under visible-light irradiation at room temperature [Display omitted] •The successful substitution of Zn2+ by Ti4+ in layered hydroxides.•Ti4+ in octahedral sites of hydroxide layers is prerequisite for the destruction of rhodamine B.•Effective degradation efficiency of rhodamine B at a near neutral pH conditions. Ti-doped layered zinc hydroxide materials with different molar ratios of Ti/Zn have been synthesized through the coprecipitation method at pH of 9.0–9.5. The materials possess layered structure with carbonate anions in the interlayer regions. The catalysts have uniform particle sizes and high surface area. An isomorphous substitution of Zn2+ by Ti4+ in the brucite-like sheets makes a promotional effect on the photocatalytic activity in the degradation of rhodamine B aqueous solution. The catalytic results indicated that the intra layer sheet Ti4+ ions are more active than the extra −TiO2 components in the complete removal of rhodamine B. The degradation efficiency is dependant on the intra lattice Ti4+ contents and reaction variables.
ISSN:2213-3437
2213-3437
DOI:10.1016/j.jece.2016.09.014