Synthesis of Ni and rare earth metal (La, Pr, and Nd) oxides from spent Ni–MH batteries by selective precipitation with formic acid an investigation of photoluminescence properties

Marins, A.A.L.; Banhos, S.G.; Cruz, Paula; Rodrigues, Rodrigo Ventura; Marciniak, Ł.; Muri, Emanuel José Bassani; Stręk, W.; Freitas, M.B.J.G.

doi:10.1007/s11581-019-03158-3

Cited by 10 publications

(2 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…FTIR spectra of nickel (II) formate, GO, GO/Ni 2+ , and RGO/Ni (0) composites are shown in Figure 4. The IR spectrum of the original nickel (II) formate (Figure 4a) corresponds to the literature data [38][39][40]. Graphene oxide (Figure 4b) has a characteristic broadened band in the region of 3000-3400 cm −1 , corresponding to vibrations of -OH groups and adsorbed water molecules.…”

Section: Resultssupporting

confidence: 53%

Ni Nanoparticles on the Reduced Graphene Oxide Surface Synthesized in Supercritical Isopropanol

Ioni,

Popova,

Maksimov

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

Nanocomposites based on ferromagnetic nickel nanoparticles and graphene-related materials are actively used in various practical applications such as catalysis, sensors, sorption, etc. Therefore, maintaining their dispersity and homogeneity during deposition onto the reduced graphene oxide substrate surface is of crucial importance to provide the required product characteristics. This paper demonstrates a new, reproducible method for preparing a tailored composite based on nickel nanoparticles on the reduced graphene oxide surface using supercritical isopropanol treatment. It has been shown that when a graphene oxide film with previously incorporated Ni2+ salt is treated with isopropanol at supercritical conditions, nickel (2+) is reduced to Ni (0), with simultaneous deoxygenation of the graphene oxide substrate. The resulting composite is a solid film exhibiting magnetic properties. XRD, FTIR, Raman, TEM, and HRTEM methods were used to study all the obtained materials. It was shown that nickel nanoparticles on the surface of the reduced graphene oxide had an average diameter of 27 nm and were gradually distributed on the surface of reduced graphene oxide sheets. The data obtained allowed us to conduct a reconnaissance discussion of the mechanism of composite fabrication in supercritical isopropanol.

show abstract

Section: Resultssupporting

confidence: 53%

Ni Nanoparticles on the Reduced Graphene Oxide Surface Synthesized in Supercritical Isopropanol

Ioni,

Popova,

Maksimov

et al. 2023

Nanomaterials

View full text Add to dashboard Cite

show abstract

“…Then, they followed two more steps using H 2 SO 4 leaching and precipitation where 82.59% of La, 90.75% of Ce, and 85.97% of Nd were recovered as hexagonal rod crystals on a micron scale. Marins et al 25 employed formic acid for the leaching of Ni and REEs that ended up in the formation of impure NiO (77.6%) and PrNiO 3 (96.6%) phases. Regarding the thermal treatment, Mir et al 24 used microwave pre-treatment for the decomposition of Ni(OH) 2 and LaNi 5 present in Ni–MH batteries.…”

Section: Introductionmentioning

confidence: 99%

Tailoring of a highly stable Mn_1−x−y(Ce_xLa_y)O_2−δ pseudocapacitor thin-film and rare earth oxide nanospheres through selective purification of rare earth oxides derived from Ni–MH batteries

et al. 2022

View full text Add to dashboard Cite

show abstract

Chemical isolation of rare earth elements (as pure rare earth oxides) from Nd-Fe-B magnets and Ni-MH batteries

Khayyam Nekouei,

Maroufi,

Salehi

et al. 2024

Journal of Environmental Chemical Engineering

View full text Add to dashboard Cite

Synthesis of Ni and rare earth metal (La, Pr, and Nd) oxides from spent Ni–MH batteries by selective precipitation with formic acid an investigation of photoluminescence properties

Cited by 10 publications

References 42 publications

Ni Nanoparticles on the Reduced Graphene Oxide Surface Synthesized in Supercritical Isopropanol

Ni Nanoparticles on the Reduced Graphene Oxide Surface Synthesized in Supercritical Isopropanol

Tailoring of a highly stable Mn_1−x−y(Ce_xLa_y)O_2−δ pseudocapacitor thin-film and rare earth oxide nanospheres through selective purification of rare earth oxides derived from Ni–MH batteries

Chemical isolation of rare earth elements (as pure rare earth oxides) from Nd-Fe-B magnets and Ni-MH batteries

Contact Info

Product

Resources

About

Synthesis of Ni and rare earth metal (La, Pr, and Nd) oxides from spent Ni–MH batteries by selective precipitation with formic acid an investigation of photoluminescence properties

Cited by 10 publications

References 42 publications

Ni Nanoparticles on the Reduced Graphene Oxide Surface Synthesized in Supercritical Isopropanol

Ni Nanoparticles on the Reduced Graphene Oxide Surface Synthesized in Supercritical Isopropanol

Tailoring of a highly stable Mn1−x−y(CexLay)O2−δ pseudocapacitor thin-film and rare earth oxide nanospheres through selective purification of rare earth oxides derived from Ni–MH batteries

Chemical isolation of rare earth elements (as pure rare earth oxides) from Nd-Fe-B magnets and Ni-MH batteries

Contact Info

Product

Resources

About

Tailoring of a highly stable Mn_1−x−y(Ce_xLa_y)O_2−δ pseudocapacitor thin-film and rare earth oxide nanospheres through selective purification of rare earth oxides derived from Ni–MH batteries