Uptake and degradation of Orange II by zinc aluminum layered double oxides

Zhang, Luhong, Xiong, Zhigang, Li, Li, Burt, Ryan and Zhao, X. S. (2016) Uptake and degradation of Orange II by zinc aluminum layered double oxides. Journal of Colloid and Interface Science, 469 224-230. doi:10.1016/j.jcis.2016.02.005


Author Zhang, Luhong
Xiong, Zhigang
Li, Li
Burt, Ryan
Zhao, X. S.
Title Uptake and degradation of Orange II by zinc aluminum layered double oxides
Journal name Journal of Colloid and Interface Science   Check publisher's open access policy
ISSN 1095-7103
0021-9797
Publication date 2016-05-01
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jcis.2016.02.005
Open Access Status Not Open Access
Volume 469
Start page 224
End page 230
Total pages 7
Place of publication Maryland Heights, MO, United States
Publisher Academic Press
Collection year 2017
Language eng
Formatted abstract
In this work ZnAl-layered double oxide composites (LDO) were developed to remove organic dyes in wastewater by adsorption and photocatalysis. Various LDO composites were synthesized by adjusting synthetic parameters including the molar ratio of Zn to Al, and calcination temperature. LDO adsorption and photocatalytic properties for decomposition of organic dyes were also investigated. Orange II sodium salt (OrgII), an azo dye and water contaminant, was chosen as the model to investigate the properties of LDOs compared with commercial ZnO, TiO2 (P25) and ZnO-LDH. The adsorption and photocatalytic performance results showed that LDO composites significantly enhanced adsorption-photocatalytic performance for OrgII degradation. LDO at the Zn/Al molar ratio of 2 (2)LDO has the best adsorption capacity (800.8 mg/g of OrgII for (2)LDO), and improved photocatalytic activity (74.3% of OrgII decomposition for (2)LDO). It is believed that the better adsorption properties of LDO are due to the adsorption and intercalation of dyes in the interlayer during LDO's rehydration process. ZnO/ZnAl-rehydrated layered double hydroxide composites (ZnO-rLDH) after rehydration of LDOs in aqueous solution was also obtained. After restoration in water, the structure and morphology of ZnO-rLDHs were characterized by XRD, FTIR, SEM/TEM, N2 adsorption/desorption and UV-vis-DRS. Finally, the relations between the structural features of the ZnO-rLDH composites and the adsorption properties and photocatalytic activity of LDO was studied.
Keyword Adsorption
Layered double hydroxides (LDHs)
Photocatalysis
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
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