Synthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock

Abstract Analcime is nowadays an important component in dental porcelain systems, in heterogeneous catalysis, in the nanoelectronic field, in selective adsorption and in stomatology (dental filling and prosthesis). Analcime synthesis from an impure, silica-rich kaolinite rock coming from Romana (Sas...

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Autores principales:	Daniela Novembre, Domingo Gimeno
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/6cbe38e39577478fbc1035bfd5d86230
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spelling	oai:doaj.org-article:6cbe38e39577478fbc1035bfd5d862302021-12-02T18:18:44ZSynthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock10.1038/s41598-021-92862-02045-2322https://doaj.org/article/6cbe38e39577478fbc1035bfd5d862302021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92862-0https://doaj.org/toc/2045-2322Abstract Analcime is nowadays an important component in dental porcelain systems, in heterogeneous catalysis, in the nanoelectronic field, in selective adsorption and in stomatology (dental filling and prosthesis). Analcime synthesis from an impure, silica-rich kaolinite rock coming from Romana (Sassari, Italy) is here presented. A synthesis protocol is proposed that aims to make an improvement of synthesis conditions compared to the past. The hydrothermal treatment is in fact here achieved without aging times and without the use of sodium silicate or other additional silica source reported in the literature. Lower calcination temperature, synthesis temperature and crystallization time are verified in this work. The kaolin is subjected to calcination at the temperature of 650 °C and then mixed with NaOH. The experiment is performed at ambient pressure and 170 ± 0.1 °C. The degree of purity of analcime is calculated in 97.57% at 10 h. Analcime is characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy, inductively coupled plasma optical emission spectrometry and thermal analysis. Density is also calculated. Cell parameters and the amount of amorphous phase in the synthesis powders is estimated with quantitative phase analysis using the combined Rietveld and reference intensity ratio methods. The experimental conditions make the synthesis protocol particularly attractive from an economic point of view. Also this work does not use a commercial kaolin but silica-rich impure kaolinitic rock from a disused quarry. This further reduces the costs of the experimental protocol. It also gives the protocol an added value, as the synthesis of a useful mineral is obtained through the valorization of an otherwise unused georesource. Both chemical and physical characterization of analcime is satisfactory making the experimental protocol very promising for an industrial transfer.Daniela NovembreDomingo GimenoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Daniela Novembre Domingo Gimeno Synthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock
description	Abstract Analcime is nowadays an important component in dental porcelain systems, in heterogeneous catalysis, in the nanoelectronic field, in selective adsorption and in stomatology (dental filling and prosthesis). Analcime synthesis from an impure, silica-rich kaolinite rock coming from Romana (Sassari, Italy) is here presented. A synthesis protocol is proposed that aims to make an improvement of synthesis conditions compared to the past. The hydrothermal treatment is in fact here achieved without aging times and without the use of sodium silicate or other additional silica source reported in the literature. Lower calcination temperature, synthesis temperature and crystallization time are verified in this work. The kaolin is subjected to calcination at the temperature of 650 °C and then mixed with NaOH. The experiment is performed at ambient pressure and 170 ± 0.1 °C. The degree of purity of analcime is calculated in 97.57% at 10 h. Analcime is characterized by X-ray diffraction, infrared spectroscopy, scanning electron microscopy, inductively coupled plasma optical emission spectrometry and thermal analysis. Density is also calculated. Cell parameters and the amount of amorphous phase in the synthesis powders is estimated with quantitative phase analysis using the combined Rietveld and reference intensity ratio methods. The experimental conditions make the synthesis protocol particularly attractive from an economic point of view. Also this work does not use a commercial kaolin but silica-rich impure kaolinitic rock from a disused quarry. This further reduces the costs of the experimental protocol. It also gives the protocol an added value, as the synthesis of a useful mineral is obtained through the valorization of an otherwise unused georesource. Both chemical and physical characterization of analcime is satisfactory making the experimental protocol very promising for an industrial transfer.
format	article
author	Daniela Novembre Domingo Gimeno
author_facet	Daniela Novembre Domingo Gimeno
author_sort	Daniela Novembre
title	Synthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock
title_short	Synthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock
title_full	Synthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock
title_fullStr	Synthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock
title_full_unstemmed	Synthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock
title_sort	synthesis and characterization of analcime (ana) zeolite using a kaolinitic rock
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/6cbe38e39577478fbc1035bfd5d86230
work_keys_str_mv	AT danielanovembre synthesisandcharacterizationofanalcimeanazeoliteusingakaoliniticrock AT domingogimeno synthesisandcharacterizationofanalcimeanazeoliteusingakaoliniticrock
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Synthesis and characterization of analcime (ANA) zeolite using a kaolinitic rock

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