Hollow Spherical Capsules From Geopolymerized Gel Beads With Halloysite Nanotubes for Pollutants Removal and CO<sub>2</sub> Capture
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F26%3A0198517" target="_blank" >RIV/00216305:26310/26:0198517 - isvavai.cz</a>
Result on the web
<a href="https://onlinelibrary.wiley.com/doi/10.1002/smll.202504306" target="_blank" >https://onlinelibrary.wiley.com/doi/10.1002/smll.202504306</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/smll.202504306" target="_blank" >10.1002/smll.202504306</a>
Alternative languages
Result language
angličtina
Original language name
Hollow Spherical Capsules From Geopolymerized Gel Beads With Halloysite Nanotubes for Pollutants Removal and CO<sub>2</sub> Capture
Original language description
A scalable protocol is proposed for the fabrication of hollow spherical capsules by geopolymerization of halloysite clay nanotubes (HNTs) incorporated within alginate gel beads. Alginate/HNTs composite beads have been geopolymerized by alkaline treatment through their immersion in highly concentrated NaOH solution. The influence of the immersion time on the structure and mesoscopic properties of the beads has been studied to optimize the geopolymerization efficacy as well as the mechanical resistance and adsorption performances of the capsules. SEM images demonstrate that the alkaline treatment is efficient in the conversion of compact beads to hollow spherical capsules, which possess improved water uptake capacity and enhance flexibility under compressive forces as evidenced by the relevant increase (in the range ca. 55-75%) of the elastic modulus. Due to their internal cavity and surface porosities, geopolymerized capsules exhibit better adsorption performances toward hydrocarbons with respect to the untreated alginate/HNTs beads. Moreover, geopolymerization of alginate/HNTs beads significantly improves the CO2 capture efficiency. The CO2 amount adsorbed by the composites bead has been doubled after 5 seconds of alkaline treatment. This study highlights that the geopolymerization of halloysite loaded in biopolymeric beads can be exploited to obtain sustainable materials suitable for CO2 storage and removal of contaminants.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10300 - Physical sciences
Result continuities
Project
<a href="/en/project/GA19-16646S" target="_blank" >GA19-16646S: The elimination of the negative impact of zinc in Portland cement by accelerating concrete admixtures</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Small
ISSN
1613-6810
e-ISSN
1613-6829
Volume of the periodical
17.06.2025
Issue of the periodical within the volume
17.06.2025
Country of publishing house
DE - GERMANY
Number of pages
11
Pages from-to
1-11
UT code for WoS article
001510382400001
EID of the result in the Scopus database
—