Nanostructured Samarium Doped Fluorapatites and Their Catalytic Activity towards Synthesis of 1,2,4-TriazolesReport as inadecuate


Nanostructured Samarium Doped Fluorapatites and Their Catalytic Activity towards Synthesis of 1,2,4-Triazoles


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School of Chemistry & Physics, University of KwaZulu-Natal, Westville Campus, Chiltern Hills, Durban-4000, South Africa





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Academic Editor: Arnaud Gautier

Abstract An investigation was conducted into the influence of the amino acids as organic modifiers in the facile synthesis of metal incorporated fluorapatites FAp and their properties. The nanostructured Sm doped fluorapatites Sm-FAp were prepared by a co-precipitation method using four different amino acids, namely glutamic acid, aspartic acid, glycine and histidine. The materials were characterized by various techniques including X-ray diffraction XRD, Fourier transform infra-red spectroscopy FT-IR, field emission scanning electron microscopy FE-SEM, energy-dispersive X-ray spectroscopy EDX, high resolution transmission electron microscopy HR-TEM, N2-adsorption-desorption isotherm, temperature programmed desorption TPD and fluorescence spectrophotometry. Under similar conditions, Sm-FAp prepared using different amino acids exhibited distinctly different morphological structures, surface area and pore properties. Their activity as catalysts was assessed and Sm-FAp-Glycine displayed excellent efficiency in the synthesis of 1,2,4-triazole catalyzing the reaction between 2-nitrobenzaldehyde and thiosemicarbazide with exceptional selectivity and 98% yield in a short time interval 10 min. The study provides an insight into the role of organic modifiers as controllers of nucleation, growth and aggregation which significantly influence the nature and activity of the catalytic sites on Sm-FAp. Sm-FAp could also have potential as photoactive material. View Full-Text

Keywords: Sm-fluorapatite; nanostructured catalysts; 1,2,4-traizole; organic modifiers; textural properties; amino acids Sm-fluorapatite; nanostructured catalysts; 1,2,4-traizole; organic modifiers; textural properties; amino acids





Author: Kranthi Kumar Gangu, Suresh Maddila, Surya Narayana Maddila and Sreekantha B. Jonnalagadda *

Source: http://mdpi.com/



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