Compreendendo as propriedades (estrutural, espectroscópica, colorimétrica e térmica) de sais de níquel

Andrade, Tamara Maria de; Mariani, Felipe Quadros; Júnior, Cícero Venâncio Nunes; Dalpasquale, Mariane; Danczuk, Marins; Anaissi, Fauze Jacó

doi:10.1590/s1517-707620170001.0312

Cited by 4 publications

(2 citation statements)

References 28 publications

(29 reference statements)

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“…The bands are attributed to the Laporte transitions of the ground state [ 3 A2g → 1 Eg] and [ 3 A2g → 3 T1g(F)] of nickel [42][43][44]. The bands are attributed to the Laporte transitions of the ground state [42][43][44].…”

Section: Colorimetric Analysis and Visible-nir Spectroscopymentioning

confidence: 99%

Synthesis of Green Brucite [NixMg1−x(OH)2] by Incorporation of Nickel Ions in the Periclase Phase (MgO) Applied as Pigments

Siqueira,

Schons,

Appelt

et al. 2024

Colorants

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Magnesium oxide is typically white and can be colorized with transition metal insertion by doping. We present the preparation of a green-colored hydroxide by the exchange of Mg2+ on the crystalline lattice with Ni2+ in MgO, using three nickel salts. MgOst was prepared by the colloidal starch suspension method, using cassava starch. The oxides and hydroxides, before and after, were characterized by X-ray diffraction (XRD), and show that a phase change occurs: a transition from periclase (MgO) to brucite (Mg(OH)2) due to the incorporation of nickel ions from different salts (acetate, chloride, and nitrate), resulting in the solid solution [NixMg1−x(OH)2]. The FTIR spectrum corroborates the crystallographic structure identified through XRD patterns, confirming the formation of a crystal structure resembling brucite. The new samples present a green color, indicative of the incorporation of the Ni2+ ions. The antimicrobial activity of products resulting from the doping of magnesium oxide with nickel and the precursor MgOst was assessed through the minimum inhibitory concentration (MIC) test. The evaluation included three bacterial strains: Staphylococcus aureus (ATCC 25923), Escherichia coli (ATCC 25922), Salmonella gallinarum (ATCC 9184), and a yeast strain, Candida albicans (ATCC 10231). The obtained results were promising; the tested samples exhibited antimicrobial activity, with a MIC ranging from 0.312 to 0.625 μg.μL−1. The nickel compound, derived from the precursor chloride salt, demonstrated superior MIC activity. Notably, all tested samples displayed bactericidal activity against the S. aureus strain and exhibited a broad spectrum of inhibition, encompassing both Gram-positive and Gram-negative strains. Only the nickel compounds derived from precursors with acetate and nitrate anions demonstrated antimicrobial activity against C. albicans, exhibiting a fungistatic behavior. Based on the conducted studies, [NixMg1−x(OH)2] has emerged as a promising antimicrobial agent, suitable for applications requiring the delay or inhibition of bacterial growth.

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Section: Colorimetric Analysis and Visible-nir Spectroscopymentioning

confidence: 99%

Synthesis of Green Brucite [NixMg1−x(OH)2] by Incorporation of Nickel Ions in the Periclase Phase (MgO) Applied as Pigments

Siqueira,

Schons,

Appelt

et al. 2024

Colorants

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“…O NiO é majoritariamente formado entre 400-600°C. O Ni(OH)2, em menor fração quando é formado, pode se decompor em NiO em temperaturas acima de 600°C [106].…”

Section: Espectroscopia De Impedância Dos Eletrólitosunclassified

Desenvolvimento de célula a combustível de óxido sólido pelo método de colagem de fita e co-sinterização

Rodrigues¹

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pela confiança, paciência e orientação. O senhor é um professor brilhante, dedicado e um ótimo parceiro de trabalho. Muito obrigada professor, eu aprendi muito. Ao CNPq, IPEN e USP pelo apoio financeiro e infraestrutura. Aos professores do Centro de Células a Combustível e Hidrogênio (CECCO) e do Centro de Ciências dos Materiais (CCTM), que sempre estiveram dispostos em me ajudar. Aos professores Reginaldo e Eliana Mucillo pela disponibilidade e assistência nos experimentos. Aos pesquisadores Débora Marani e Vincenzo Esposito pelas orientações e ajuda no desenvolvimento do projeto.As minhas amigas e parceiras de trabalho Marina e Letícia M. pelos ensinamentos, apoio e carinho. Vocês foram minhas "mamães" no laboratório e sempre farão parte da minha vida. Amo vocês, muito obrigada por tudo.Aos meus amigos e parceiros de laboratório, em especial a Vanessa, Vivian,

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Nickel selenate: a deep and efficient characterization

Gaglieri

Alarcon

Moura

et al. 2019

J Therm Anal Calorim

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Compreendendo as propriedades (estrutural, espectroscópica, colorimétrica e térmica) de sais de níquel

Cited by 4 publications

References 28 publications

Synthesis of Green Brucite [NixMg1−x(OH)2] by Incorporation of Nickel Ions in the Periclase Phase (MgO) Applied as Pigments

Synthesis of Green Brucite [NixMg1−x(OH)2] by Incorporation of Nickel Ions in the Periclase Phase (MgO) Applied as Pigments

Desenvolvimento de célula a combustível de óxido sólido pelo método de colagem de fita e co-sinterização

Nickel selenate: a deep and efficient characterization

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