Biography:

In the past Miguel A. Vicente has collaborated on articles with Emerson H. de Faria and Beatriz González. One of their most recent publications is Hybrid materials prepared by interlayer functionalization of kaolinite with pyridine-carboxylic acids. Which was published in journal Journal of Colloid and Interface Science.

More information about Miguel A. Vicente research including statistics on their citations can be found on their Copernicus Academic profile page.

Miguel A. Vicente's Articles: (6)

Hybrid materials prepared by interlayer functionalization of kaolinite with pyridine-carboxylic acids

AbstractThis paper presents the results of the functionalization of Brazilian São Simão kaolinite with pyridine-2-carboxylic and pyridine-2,6-dicarboxylic acids. The functionalization involved refluxing of the pyridine-carboxylic acid in the presence of kaolinite previously intercalated with dimethyl sulfoxide; both acids effectively displaced dimethyl sulfoxide from the clay interlayer. The resulting materials were characterized by X-ray diffraction, thermal analysis, infrared absorption spectroscopy, and C and N elemental analysis. The X-ray diffractograms revealed the incorporation of the acid molecules into the interlayer space of kaolinite. The thermogravimetric curves of the kaolinite samples functionalized with the pyridine-carboxylic acids indicated that the materials were thermally stable up to 300 °C. The displacements of the bands due to interlayer hydroxyls in the infrared absorption spectra also confirmed the functionalization of the kaolinite with the pyridine-carboxylic acids.

Research paperTwo synthesis approaches of Fe-containing intercalated montmorillonites: Differences as acid catalysts for the synthesis of 1,5-benzodeazepine from 1,2-phenylenediamine and acetone

Highlights•Fe-containing composites based on montmorillonite (Mt) were synthesized by two approaches.•Si,Fe-Mt materials were prepared by the sol-gel polymerization technique.•Al,Fe-Mt materials were prepared by the pillaring method.•Synthesis of 1,5-benzodiazepine over Si,Fe-Mt and Al,Fe-Mt materials was studied.•Amount of Fe and Lewis acid sites were key factors for the high yield of 1,5-benzodiazepine.

Research PaperCatalytic activity of porphyrin-catalyts immobilized on kaolinite

Highlights•The matrix (kaolinite or silica) conditioned the catalytic oxidation performance of the solids.•The kaolinite materials in the design of more selective catalysts.•The catalysts were tested in oxidation of cyclooctene and cyclohexane.•The silica-supported led to more efficient catalysts, and the kaolinite led to high selectivity.

Fenton degradation of sulfanilamide in the presence of Al,Fe-pillared clay: Catalytic behavior and identification of the intermediates

Highlights•Fe,Al/M-pillared clays were synthesized from clay in Na+, Ca2+ and Ba2+ forms.•The degradation of sulfanilamide with H2O2 over Fe,Al/M-pillared clays was studied.•The type of exchangeable cations of clay affected the efficiency of the solids.•The degradation intermediate products were identified.•Fe,Al/Na-pillared clay was stable for three successive cycles.

Recent advances in the use of computed tomography in concrete technology and other engineering fields

Highlights•CT-Scan technology is a powerful research tool for researchers of many engineering fields.•A huge amount of research has been conducted during the last decades where this technology plays the core role of the work.•The research fields to which this technology can be applied are almost unlimited, far beyond its well-known medical applications.•Some research fields have been discussed: paleontology, heritage and ancient relics, metals, composites, pavements, rocks, and concrete.•This paper show interesting research lines from many different fields, as a way to transfer know-how between the different research fields.

Short communicationEffect of nitric acid modification of montmorillonite clay on synthesis of solketal from glycerol and acetone

Highlights•Natural montmorillonite (MM) was modified by 0.125–3.0 mol/dm3 HNO3.•The concentration of HNO3 affected the textural and acid-base properties.•Condensation of glycerol with acetone over the acid-activated clays was investigated.•Effect of acidic modification of MM on reaction rate was investigated.•Catalytic activity of catalyst depended on the amount of Brønsted acid sites.

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