Advanced oxidation of rhodamine B with hydrogen peroxide over Zn Cr layered double hydroxide catalysts

Zn/Cr layered zinc hydroxide materials with different molar ratios of Cr/Zn have been synthesized through the coprecipitation method at pH of 9.0–9.5. At high Cr/Zn molar ratios of 0.5/1–1/3, the materials possess some layered structure with carbonate anions between the interlayer galleries. The cat...

Full description

Saved in:
Bibliographic Details
Published in:Journal of science. Advanced materials and devices 2017-09, Vol.2 (3), p.317-325
Main Authors: Thao, Nguyen Tien, Nga, Han Thi Phuong, Vo, Nguyen Que, Nguyen, Hong Dieu Khanh
Format: Article
Language:English
Subjects:
AOP
Cr2O3
Degradation
Layered hydroxides
Rhodamine B
Zn/Cr materials
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Zn/Cr layered zinc hydroxide materials with different molar ratios of Cr/Zn have been synthesized through the coprecipitation method at pH of 9.0–9.5. At high Cr/Zn molar ratios of 0.5/1–1/3, the materials possess some layered structure with carbonate anions between the interlayer galleries. The catalysts present uniform particle sizes and quite high surface area. An isomorphous substitution of Zn2+ by Cr3+ in the brucite-like sheets makes the layered Cr-doped zinc hydroxides potential catalysts for efficient oxidation of rhodamine B with H2O2 solution. The experimental results indicated that the intra-lattice Cr3+ ions are more active than Cr2O3 components in the oxidative removal of rhodamine B. The degradation efficiency is dependent on the intra lattice Cr3+ contents and reaction variables. The Cr/Zn LDH gave a high decolorization (99%) of rhodamine B at near neutral pH and room temperature.
ISSN:2468-2179
2468-2179
DOI:10.1016/j.jsamd.2017.07.005