Effect of anions and medium pH on the formation of ZnS micro- and nanoparticles from thiourea solutions

Uptake of Radionuclides 60Co, 137Cs, and 90Sr with α-Fe2O3 and Fe3O4 Particles from Aqueous Environment

“…Moreover, in the IR spectrum of the Fe 3 O 4 powder represented by curve b , absorption bands with maxima at 1400, 1111, 1040, and 971 cm −1 are registered, which can be attributed to the presence of SO 4 2− . In turn, the absorption band with a maximum of 1400 cm −1 can be attributed to the CO 3 2− ion vibrations, as it was in other studies, such as [ 38 , 39 ]. The presence of sulfate ions is caused by the application of iron sulfate as a precursor in the synthesis, while carbonate ions appeared as a consequence of the alkaline solution carbonization process during particles precipitation.…”

Optical and electrical properties of ZnSe films grown by hydrochemical deposition

“…3 shows an absorption band in the range 3000-3600 cm -1 (centered at 3400 cm -1 ) and a band at 1607 cm -1 , which arise, respectively, from stretching and bending modes of water molecules [13,14], due to the presence of potassium bromide. There are also absorption bands at 1448 and 1355 cm -1 , due to vibrations of the ion, and an absorption band at 1140 cm -1 , arising from vibrations of the ion [13]. Figure 4 shows optical transmission spectra of the films.…”

“…Anion composition is known to have a significant effect on the particle formation process [13,14], which offers the possibility of controlling the morpho logical characteristics of particles. As an additional component in ZnSe film growth, one can use sodium sulfite, which will also contribute to selenation.…”

Sorption extraction of 137Cs and 90Sr radionuclides from aqueous solutions by MnO(OH) nanoparticles

“…Various sorption materials are widely used for the extraction of radionuclides from water solvents. These are natural and synthetic ion exchangers, complexing agents, composites and other types of sorbents (Krasnopyorova et al, 2007(Krasnopyorova et al, , 2008(Krasnopyorova et al, , 2013Lujaniene et al, 2008;Mokhodoeva et al, 2011;Myasoedova, 2005;Odnovolova et al, 2014;Ozverdi and Erdem, 2006;Sofronov et al, 2013a;Wu et al, 2008). During the preparation of the sorption materials, much attention is paid on obtaining the particles with large specific surface, which increases the sorption capacity of the materials (Wu et al, 2008).…”