Počet záznamů: 1

Magnetite nanoparticles coat around activated -alumina spheres: A case of novel protection of moisture-sensitive materials against hydration.

SYSNO ASEP	0504733
Druh ASEP	J - Článek v odborném periodiku
Zařazení RIV	Záznam nebyl označen do RIV
Poddruh J	Ostatní články
Název	Magnetite nanoparticles coat around activated -alumina spheres: A case of novel protection of moisture-sensitive materials against hydration.
Tvůrce(i)	Kupčík, Jaroslav (UCHP-M)_{RID, ORCID, SAI} Mikysek, Petr (GLU-S)_{SAI, ORCID} Pokorná, Dana (UCHP-M)_{RID, SAI} Fajgar, Radek (UCHP-M)_{RID, ORCID, SAI} Cuřínová, Petra (UCHP-M)_{RID, SAI, ORCID} Soukup, Karel (UCHP-M)_{RID, SAI, ORCID} Pola, Josef (UCHP-M)_{RID, ORCID, SAI}
Zdroj.dok.	Chemical Reports. - : SyncSci Publishing - ISSN 2591-7943 Roč. 1, č. 2 (2019), s. 67-76
Poč.str.	10 s.
Jazyk dok.	eng - angličtina
Země vyd.	SG - Singapur
Klíč. slova	protection against hydration ; activated alumina ; magnetite nanoparticles
Vědní obor RIV	CF - Fyzikální chemie a teoretická chemie
Obor OECD	Physical chemistry
Vědní obor RIV – spolupráce	Geologický ústav - Analytická chemie, separace
CEP	TA04020860 GA TA ČR - Technologická agentura ČR
Institucionální podpora	UCHP-M - RVO:67985858 ; GLU-S - RVO:67985831
DOI	10.25082/CR.2019.02.003
Anotace	Protection of various materials against hydration is of continuing interest to chemists and material scientists. We report on stabilization of porous surface of activated -alumina spheres (AAS) against hydration by an adhesive coat of nano-magnetite particles. The nano-Fe3O4-coated AAS were prepared in the ultrasound-agitated suspension of magnetite nanoparticles in heptane and were characterized by using X-ray diffraction, scanning electron microscopy (SEM), transmission electron microscopy (TEM), BET surface area analysis and X-ray photoelectron spectroscopy (XPS). It is deduced that nanoparticle-alumina bonding interaction in non-polar organic solvent is enhanced by van der Waals attractive forces and that sonication induces changes in alumina morphology only in regions of contact between alumina and magnetite nanoparticles. The coated AAS submerged in still water avoid hydration and remain permeable by small gaseous (N2) molecules, while those soaked in moving water lose part of their coat and undergo hydration. The pristine and the coated AAS were briefly compared for their ability to degrade model antibiotics by using LC-MS analysis. It is confirmed that the degradation of trimethoprim is more efficient on the coated AAS. Our results are challenging for further research of Coulombic interactions between nano-particles and appropriate solid supports.
Pracoviště	Ústav chemických procesů
Kontakt	Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227
Rok sběru	2020

Počet záznamů: 1