Synthesis, characterization, and challenges faced during the preparation of zirconium pillared clays
(2022) In Arabian Journal of Chemistry 15(4).- Abstract
- In this study, Zr-pillared montmorillonite clays (Zr-PILCs) were synthesized using two different precursor materials: raw montmorillonite (CM) and sodium ion-saturated montmorillonite (Na-CM) at different Zr/clay ratios (2.5, 5 and 10 mmol/g). To study the effect of Zr concentration and clay pre-treatment with NaCl on pillaring, the modified clay samples were characterized in detail using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), high-resolution transmission electron microscopy (HRTEM), scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy (STEM-EDX). The XRD analysis showed the increase of basal spacing of Zr-PILCs prepared from both precursor... (More)
- In this study, Zr-pillared montmorillonite clays (Zr-PILCs) were synthesized using two different precursor materials: raw montmorillonite (CM) and sodium ion-saturated montmorillonite (Na-CM) at different Zr/clay ratios (2.5, 5 and 10 mmol/g). To study the effect of Zr concentration and clay pre-treatment with NaCl on pillaring, the modified clay samples were characterized in detail using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), high-resolution transmission electron microscopy (HRTEM), scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy (STEM-EDX). The XRD analysis showed the increase of basal spacing of Zr-PILCs prepared from both precursor materials: from 1.26 to 1.74 nm in the case of CM, and from 1.13 to 1.93 nm for Na-CM. Results from FT-IR revealed new bands ascribed to Zr-O bonds in the range of 400–500 cm−1 in Zr-pillared samples obtained from Na-CM at Zr/clay ratios of 2.5 and 5 mmol/g. The distribution and nature of Zr species in between the silicate layers were studied using STEM-EDX and HAADF imaging. They were found to be separated by a distance of 1.5–3 nm and their thickness lies in the range of 1–2 nm. Pillared clays prepared from pre-treatment with NaCl were more thermally stable at higher temperatures. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/2a9a8f0e-c41c-430e-8057-dd433f4f8463
- author
- Chauhan, Tanya
; Udayakumar, Mahitha
; Ahmed Shehab, Mohammed
; Kristály, Ferenc
; Katalin Leskó, Anett
; Ek, Martin
LU
; Wahlqvist, David LU ; Tóth, Pál ; Hernadi, Klara and Németh, Zoltán
- organization
- publishing date
- 2022-04-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Montmorillonite, Zr-PILCs, Pillaring, Sodium-saturated montmorillonite, Specific surface area, Basal spacing
- in
- Arabian Journal of Chemistry
- volume
- 15
- issue
- 4
- article number
- 103706
- pages
- 10 pages
- publisher
- Elsevier
- external identifiers
-
- scopus:85123708619
- ISSN
- 1878-5352
- DOI
- 10.1016/j.arabjc.2022.103706
- language
- English
- LU publication?
- yes
- id
- 2a9a8f0e-c41c-430e-8057-dd433f4f8463
- date added to LUP
- 2022-02-09 15:04:07
- date last changed
- 2023-11-10 01:58:08
@article{2a9a8f0e-c41c-430e-8057-dd433f4f8463, abstract = {{In this study, Zr-pillared montmorillonite clays (Zr-PILCs) were synthesized using two different precursor materials: raw montmorillonite (CM) and sodium ion-saturated montmorillonite (Na-CM) at different Zr/clay ratios (2.5, 5 and 10 mmol/g). To study the effect of Zr concentration and clay pre-treatment with NaCl on pillaring, the modified clay samples were characterized in detail using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), high-resolution transmission electron microscopy (HRTEM), scanning transmission electron microscopy and energy-dispersive X-ray spectroscopy (STEM-EDX). The XRD analysis showed the increase of basal spacing of Zr-PILCs prepared from both precursor materials: from 1.26 to 1.74 nm in the case of CM, and from 1.13 to 1.93 nm for Na-CM. Results from FT-IR revealed new bands ascribed to Zr-O bonds in the range of 400–500 cm−1 in Zr-pillared samples obtained from Na-CM at Zr/clay ratios of 2.5 and 5 mmol/g. The distribution and nature of Zr species in between the silicate layers were studied using STEM-EDX and HAADF imaging. They were found to be separated by a distance of 1.5–3 nm and their thickness lies in the range of 1–2 nm. Pillared clays prepared from pre-treatment with NaCl were more thermally stable at higher temperatures.}}, author = {{Chauhan, Tanya and Udayakumar, Mahitha and Ahmed Shehab, Mohammed and Kristály, Ferenc and Katalin Leskó, Anett and Ek, Martin and Wahlqvist, David and Tóth, Pál and Hernadi, Klara and Németh, Zoltán}}, issn = {{1878-5352}}, keywords = {{Montmorillonite; Zr-PILCs; Pillaring; Sodium-saturated montmorillonite; Specific surface area; Basal spacing}}, language = {{eng}}, month = {{04}}, number = {{4}}, publisher = {{Elsevier}}, series = {{Arabian Journal of Chemistry}}, title = {{Synthesis, characterization, and challenges faced during the preparation of zirconium pillared clays}}, url = {{http://dx.doi.org/10.1016/j.arabjc.2022.103706}}, doi = {{10.1016/j.arabjc.2022.103706}}, volume = {{15}}, year = {{2022}}, }