Zeolite/ZnO composites based on a Cuban natural clinoptilolite and preliminary evaluation in methylene blue adsorption

被引：12

作者：

Costa-Marrero, Yailen ^{[1
]}

de Andrade, Marcelo B. ^{[2
]}

Ellena, Javier ^{[2
]}

Duque-Rodriguez, Julio ^{[3
]}

Farias, Tani ^{[3
]}

Autie-Castro, Giselle ^{[3
]}

机构：

[1] Univ Ciencias Informat, Km 21-2 Autopista Habana, Havana, Cuba

[2] Univ Sao Paulo, Inst Fis Sao Carlos, Ave Trab Sao Carlense,400 Parque Arnold Schimi, BR-13566590 Sao Carlos, SP, Brazil

[3] Univ Havana, Inst Mat Sci & Technol, Zapata & G,S-N,Plaza Revoluc, Havana 10400, Cuba

来源：

MATERIALS RESEARCH EXPRESS | 2020年 / 7卷 / 01期

关键词：

composite; clinoptilolite; ZnO nanoparticles; mechanosynthesis; 'in situ' synthesis; SURFACE; PHOTODEGRADATION; POROSITY; AREA;

D O I：

10.1088/2053-1591/ab6a5c

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two composites based on a Zn2+ exchanged natural clinoptilolite and ZnO nanoparticles were obtained by mechanosynthesis and 'in situ' methods. Characterization of resulting materials was carried out using XRD, Raman spectroscopy, TGA, FE-SEM and N-2 adsorption. XRD results showed that no significant changes in the crystalline structure of the zeolite took place due to the performed treatments. Thermogravimetric behaviour indicated a high thermal stability for all samples. Raman spectra exhibited the characteristic bands for clinoptilolite zeolite and ZnO reported in the literature and the RRUFF database. Morphology changes were observed between natural and exchanged clinoptilolite and the 'in situ' obtained composite. Textural analysis showed a decrease in surface area of 'in situ' composite compared with the exchanged zeolites, related to the partial nanoparticle deposition in the pore entrances. The adsorption studies of methylene blue in the zeolitic samples and composites showed that all evaluated materials were able to absorb the dye from aqueous solutions.

引用

页数：9

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