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Title: A facile mechanochemical approach to synthesize Zn-Al layered double hydroxide

Abstract

In this study, a mechanochemical route to synthesize Zn-Al layered double hydroxide (LDH) was introduced, in which Zn basic carbonate and Al hydroxide were first dry milled into an activated state and then agitated in water to obtain the final products. The as-prepared samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetry (TG) and Scanning electron microscopy (SEM). The products possessed a high crystallinity of Zn–Al LDH phase without any other impurities, proving a facile and effective preparation of Zn–Al LDH by using non-heating mechanochemical approach. - Highlights: • A non-heating mechanochemical route to synthesize Zn-Al LDH. • The products possessed high crystalline Zn-Al LDH phase. • No emission of other impurities or wastewater.

Authors:
 [1]; ; ;  [1];  [1];  [2]
  1. School of Resources and Environmental Engineering, Wuhan University of Technology, Luoshi Road 122, Wuhan, Hubei 430070 (China)
  2. College of Ecological Environment and Urban Construction, Fujian University of Technology, Fuzhou 350118 (China)
Publication Date:
OSTI Identifier:
22658282
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 250; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALUMINIUM COMPOUNDS; EXPERIMENTAL DATA; FOURIER TRANSFORM SPECTROMETERS; INFRARED SPECTRA; SCANNING ELECTRON MICROSCOPY; SYNTHESIS; THERMAL GRAVIMETRIC ANALYSIS; WASTE WATER; X-RAY DIFFRACTION; ZINC COMPOUNDS

Citation Formats

Qu, Jun, E-mail: forsjun@whut.edu.cn, He, Xiaoman, Chen, Min, Huang, Pengwu, Zhang, Qiwu, E-mail: zhangqw@whut.edu.cn, and Liu, Xinzhong. A facile mechanochemical approach to synthesize Zn-Al layered double hydroxide. United States: N. p., 2017. Web. doi:10.1016/J.JSSC.2017.03.013.
Qu, Jun, E-mail: forsjun@whut.edu.cn, He, Xiaoman, Chen, Min, Huang, Pengwu, Zhang, Qiwu, E-mail: zhangqw@whut.edu.cn, & Liu, Xinzhong. A facile mechanochemical approach to synthesize Zn-Al layered double hydroxide. United States. doi:10.1016/J.JSSC.2017.03.013.
Qu, Jun, E-mail: forsjun@whut.edu.cn, He, Xiaoman, Chen, Min, Huang, Pengwu, Zhang, Qiwu, E-mail: zhangqw@whut.edu.cn, and Liu, Xinzhong. Thu . "A facile mechanochemical approach to synthesize Zn-Al layered double hydroxide". United States. doi:10.1016/J.JSSC.2017.03.013.
@article{osti_22658282,
title = {A facile mechanochemical approach to synthesize Zn-Al layered double hydroxide},
author = {Qu, Jun, E-mail: forsjun@whut.edu.cn and He, Xiaoman and Chen, Min and Huang, Pengwu and Zhang, Qiwu, E-mail: zhangqw@whut.edu.cn and Liu, Xinzhong},
abstractNote = {In this study, a mechanochemical route to synthesize Zn-Al layered double hydroxide (LDH) was introduced, in which Zn basic carbonate and Al hydroxide were first dry milled into an activated state and then agitated in water to obtain the final products. The as-prepared samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermogravimetry (TG) and Scanning electron microscopy (SEM). The products possessed a high crystallinity of Zn–Al LDH phase without any other impurities, proving a facile and effective preparation of Zn–Al LDH by using non-heating mechanochemical approach. - Highlights: • A non-heating mechanochemical route to synthesize Zn-Al LDH. • The products possessed high crystalline Zn-Al LDH phase. • No emission of other impurities or wastewater.},
doi = {10.1016/J.JSSC.2017.03.013},
journal = {Journal of Solid State Chemistry},
number = ,
volume = 250,
place = {United States},
year = {Thu Jun 15 00:00:00 EDT 2017},
month = {Thu Jun 15 00:00:00 EDT 2017}
}
  • A pristine Zn/Al-layered double hydroxide (Zn/Al-LDH) showed excellent adsorption ability and selectivity towards In{sup 3+} ions from aqueous solutions. The adsorption behaviour as a function of the contact time, solution pH, ionic strength, and amount of adsorbent under ambient conditions revealed a strong dependency on the pH and ionic strength over In{sup 3+} intake. The structure and properties of Zn/Al-LDH and In{sup 3+} adsorbed Zn/Al-LDH (In–Zn/Al-LDH) were examined carefully by X-ray diffraction, Fourier transform infrared spectroscopy, N{sub 2}-sorption/desorption, UV–vis spectroscopy, and X-ray photoelectron spectroscopy. The adsorbent had a sufficient number of active sites that were responsible for the In{sup 3+}more » adsorption and quite stable even after the adsorption process. The selective adsorption of In{sup 3+} on Zn/Al-LDH was also observed even from a mixture containing competing ions, such as Mn{sup 2+}, Co{sup 2+}, Ni{sup 2+}, Cd{sup 2+}, Pb{sup 2+}, and Cu{sup 2+}. The adsorption experiments showed that Zn/Al-LDH is a promising material for the pre-concentration and selective removal of In{sup 3+} from large volumes of aqueous solutions. - Highlights: • A pristine Zn/Al-layered double hydroxide showed good selectivity for In{sup 3+} ions. • The material exhibited a maximum In{sup 3+} intake of 205 mg g{sup −1} at pH 6. • The materials showed good affinity of In{sup 3+} over Cu{sup 2+} and Pb{sup 2+} from ion mixtures.« less
  • In this paper, we report our results on the synthesis of Mg-Al and Zn-Al-layered double hydroxides using the laser ablation in the liquid technique. To prepare these layered double hydroxides (LDH) we first began with the laser generation of a Mg (or zinc) target submerged in deionized water and then ablated an aluminum target submerged in the previously prepared Mg-deionized water suspensions (Mg-dw) to produce Mg-Al LDH and in Zn-dw to prepare Zn-Al LDH. In these ablation tests, the Mg ablation duration was selected to vary from 5 to 60 min, while the Al ablation duration was kept constant atmore » 30 min for all samples. The generated Mg-Al LDH was a gel-like and well crystallized nanoparticles of a rod-like shape and were arranged in a well-organized pattern. When the Mg ablation duration between 25 and 35 min, the synthesized nanocrystals were stoichiometric with a formula of Mg6Al2(OH)(18)4.5 (H2O), the interlayer distance (d((0 0 3))-spacing) was 7.8 angstrom and the average grain size was 8.0 nm. The synthesized Zn-Al LDH revealed various lamellar thin plate-like nanostructures of hexagonal morphologies. The average diameters of these structures was about 500 nm and the thickness of a single layer was approximately about 6.0 nm. The XRD diffraction peaks were indexed in hexagonal lattice with a(o) = 3.07 angstrom and c(o) = 15.12 angstrom. These indexes were (002), (004), and (008) and the corresponding interlayer distances, d-spacing (angstrom), were 7.56 (002), 3.782 (004), and 1.891 (008), respectively.« less
  • While bis(2-mercapto-2,2-diphenyl-ethanoate) dioxomolybdate (VI), (MoO{sub 2}(OOCC(S)(C{sub 6}H{sub 5}){sub 2}){sub 2}){sup 2-} (I), ethanolic solutions stoichiometrically react with aromatic and aliphatic thiols to give the corresponding disulfides, the intercalation of I within a Zn(II)-Al(III) layered double hydroxide (LDH) allows their catalytic oxidation by dioxygen. A reaction scheme is proposed in which a Mo{sup IV}O species activates O{sub 2}, regenerating the parent Mo{sup VI}O{sub 2} complex (I), which then acts as a true catalyst. Kinetic data for the thiol oxidation reaction have been determined. The results obtained here demonstrate that the intercalation of I into a Zn(II)-Al(III) LDH host inhibits the formationmore » of catalytically inactive Mo{sup V}O species that are always formed under homogeneous conditions.« less