Montmorillonite-supported Pd0, Fe0, Cu0 and Ag0 nanoparticles: Properties and affinity towards CO2

被引：23

作者：

Bouazizi, Nabil ^{[1
,2
]}

Barrimo, Diana ^{[1
]}

Nousir, Saadia ^{[1
]}

Ben Slama, Romdhane ^{[2
]}

Roy, Rene ^{[1
]}

Azzouz, Abdelkrim ^{[1
]}

机构：

[1] Univ Quebec Montreal, Nanoqam, Dept Chem, Montreal, PQ H3C 3P8, Canada

[2] ENIG Univ Gabes, Res Unit Environm Catalyzes & Proc Anal, Gabes, Tunisia

来源：

APPLIED SURFACE SCIENCE | 2017年 / 402卷

关键词：

Montmorillonite; MNPs; CO2; adsorption; Surface properties; HYDROXIDE CARBONATE; MIXED OXIDES; ADSORPTION; CAPTURE; EVOLUTION; STORAGE;

D O I：

10.1016/j.apsusc.2017.01.004

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study reports the carbon dioxide (CO2) adsorption on montmorillonite (NaMt) incorporating Cu-0, Fe-0, Pd-0 and Ag-0 as metallic nanoparticles (MNPs). The changes in structural, textural, morphological and adsorption properties of the resulting materials (NaMt-MNPs) were investigated. Electron microscopy and X-ray diffraction showed that dispersion of fine MNPs occurs mainly within the interlayer space of NaMt, producing a slight structure expansion. This was, accompanied by a visible enhancement of the affinity towards CO2, as supported by thermal programmed desorption measurements. NaMt-MNPs displayed high CO2 retention capacity (CRC) of ca. 657 mu mol/g for NaMt-Cu as compared to NaMt. This was explained in terms of increased number of available adsorption sites due to enlarged interlayer spaces caused by MNP insertion. The differences in CO2 adsorption capacities clearly demonstrate the key role of MNPs in improving the surface properties and adsorption capacity. The results reported herein open new prospects for clay supported metal nanoparticles as efficient adsorbents for CO2. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：314 / 322

页数：9

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