Synthesis of Hydrous Aluminum (III) -Iron (III)- Manganese (IV) Ternary Mixed Oxide for Fluoride Removal

Hydrogenation of aromatic rings promoted by earth-abundant metal composites under mild conditions is an attractive and challenging subject in the long term.

Download Full-text

Mg-Al Mixed Oxide Adsorbent Synthesized Using FCT Template for Fluoride Removal from Drinking Water

Bioinorganic Chemistry and Applications ◽

10.1155/2019/5840205 ◽

2019 ◽

Vol 2019 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Jifa Liu ◽

Ping Zhao ◽

Yue Xu ◽

Xibin Jia

Keyword(s):

Drinking Water ◽

Adsorption Capacity ◽

Mixed Oxide ◽

Photoelectron Spectroscopy ◽

Raw Materials ◽

Molar Ratio ◽

Fluoride Removal ◽

Hydroxyl Groups ◽

X Ray ◽

Fluoride Adsorption

To make full use of natural waste, a novel Mg-Al mixed oxide adsorbent was synthesized by the dip-calcination method using the fluff of the chinar tree (FCT) and an Mg(II) and Al(III) chloride solution as raw materials. The adsorbents were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The effects of the Mg/Al molar ratio and calcination temperature on the performance of the novel Mg-Al mixed oxide adsorbent were investigated. The optimized Mg-Al mixed oxide adsorbent had a Langmuir adsorption capacity of 53 mg/g. This adsorption capacity was higher than that of the separate Mg oxide and Al oxide. The synergy between Mg and Al is beneficial to the adsorption performance of the material. The fluoride adsorption capacity of the optimized Mg-Al mixed oxide adsorbent is only slightly affected by ions such as Cl−, NO3−, SO42−, Na+, and K+and is excellent for use in recycling and real water. The hydroxyl groups on the surface of the Mg-Al mixed oxide adsorbent play a key role in the adsorption of fluorine. The as-obtained novel Mg-Al mixed oxide adsorbent is an efficient and environmentally friendly agent for fluoride removal from drinking water.

Download Full-text

Effects of Promoter on Structural and Surface Properties of Zirconium Oxide-Based Catalyst Materials

Molecules ◽

10.3390/molecules25112619 ◽

2020 ◽

Vol 25 (11) ◽

pp. 2619

Author(s):

Ekaterina S. Borovinskaya ◽

Steffen Oswald ◽

Wladimir Reschetilowski

Keyword(s):

Surface Properties ◽

Mixed Oxide ◽

Zirconium Oxide ◽

Active Sites ◽

Surface Composition ◽

One Pot ◽

Oxide Systems ◽

Catalytically Active ◽

Temperature Programmed ◽

Ternary Mixed Oxide

Ternary mixed oxide systems CuO/ZnO/ZrO2 and CuO/NiO/ZrO2 were synthesized by one-pot synthesis for a better understanding of the synthesis-property relationships of zirconium oxide-based catalyst materials. The prepared mixed oxide samples were analysed by a broad range of characterisation methods (XRD, N2-physisorption, Temperature-Programmed Ammonia Desorption (TPAD), and XPS) to examine the structural and surface properties, as well as to identify the location of the potential catalytically active sites. By XPS analysis, it could be shown that a progressive enrichment of the surface composition with copper takes place by changing from ZnO to NiO as a promoter. Thus, by addition of the second component, not only electronic but also the geometric properties of active sites, i.e., copper species distribution within the catalyst surface, can be affected in a desired way.

Download Full-text