: Not applicable. Information Availability Statement: Data accessible from the authors upon
: Not applicable. Data Availability Statement: Information accessible from the authors upon request. Acknowledgments: The cytotoxicity tests had been partly performed within the Far Eastern Center of Electron Microscopy (National Scientific Center of Marine Biology, FEB RAS, Vladivostok, Russia). Conflicts of Interest: The authors declare no conflict of interest.
gelsArticleStructural and Chemical Properties of -Irofulven web geopolymer Gels Incorporated with Neodymium and SamariumSnezana S. S. Nenadovi1 , Ljiljana M. Kljajevi1 , Marija M. Ivanovi1 , Miljana M. Mirkovi1 , c c c c Nadezda Radmilovi2 , Lazar Z. Rako evi2 and Milos T. Nenadovi2, c c c cDepartment of Supplies, Vin a Olesoxime Cancer Institute of Nuclear Sciences, National Institute on the Republic of Serbia, c University of Belgrade, Mike PetroviAlasa 12-14, Vin a, 11000 Belgrade, Serbia; c c [email protected] (S.S.S.N.); [email protected] (L.M.K.); [email protected] (M.M.I.); [email protected] (M.M.M.) Division of Atomics Physics, Vin a Institute of Nuclear Sciences, National Institute of the Republic of c Serbia, Mike PetroviAlasa 12-14, Vin a, 11000 Belgrade, Serbia; [email protected] (N.R.); c c [email protected] (L.Z.R.) Correspondence: [email protected]: Nenadovi, S.S.S.; Kljajevi, c c L.M.; Ivanovi, M.M.; Mirkovi, c c M.M.; Radmilovi, N.; Rako evi, c c c L.Z.; Nenadovi, M.T. Structural and c Chemical Properties of Geopolymer Gels Incorporated with Neodymium and Samarium. Gels 2021, 7, 195. https://doi.org/10.3390/gels7040195 Academic Editor: David D z D z Received: 30 September 2021 Accepted: 29 October 2021 Published: 3 NovemberAbstract: The present perform was focused on doping of 1 and five each of Nd2 O3 and Sm2 O3 in geopolymer gels. Among the most important objectives was to ascertain the influence in the behavior of Nd and Sm as dopants and structural nanoparticles modifications of your final geopolymer formed. It is shown that the disorder formed by alkali activation of metakaolin can accommodate the uncommon earth cations Nd3+ and Sm3+ into their aluminosilicate framework structure. The primary geopolymerization product identified in gels is Al-rich (Na)-AS-H gel comprising Al and Si in tetrahedral coordination. Na+ ions were balancing the unfavorable charge resulting from Al3+ in tetrahedral coordination. The modifications in the structures of your final product (geopolymer/Nd2 O3 ; Sm2 O3 ), has been characterized working with X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) analysis with power dispersive spectrometry (EDS). Nucleation at the seed surfaces leads to the formation of phase-separated gels from rare earth phase early in the reaction approach. It’s confirmed that Nd and Sm have already been shown to type unstable hydroxides Nd(OH)3 and Sm(OH)3 which might be in equilibrium using the corresponding oxides. Key phrases: geopolymer gel; uncommon earth; Nd2 O3 ; Sm2 O3 ; thermodynamic parameters; DRIFT; XRD; XPS; TEM1. Introduction A geopolymers are well-known alkali aluminosilicate cement components that will have superior mechanical, chemical and thermal properties when in comparison to other Portlandbased cements, showing drastically reduce levels of CO2 production [1]. Geopolymers kind a structure closed cage-like cavity together with combination of ring molecules which can separate metal ions or other toxic substances and catch them inside the cavity. Despite that, some metal cations can even participate in the geopolymerization reac.
