Influence of the type of fuel used for the solution combustion synthesis on the structure, morphology and magnetic properties of nanosized NiFe2O4

Lazarova, Tsvetomila; Georgieva, M.; Tzankov, D.; Voykova, Dimitrinka; Александров, Л. Н.; Cherkezova‐Zheleva, Zara; Kovacheva, D.

doi:10.1016/j.jallcom.2017.01.055

Cited by 49 publications

(24 citation statements)

References 45 publications

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“…Furthermore, it is possible to produce nearly ideal ferromagnetic nanostructured assemblies using the spinel NFO phase. On the other hand, the larger grain size leads the better crystallinity, which induces the better magnetocrystalline anisotropy and finally leads the high saturation magnetization and coercivity, and the similar results also be found by many iron oxide based materials 69 , 70 . From the above results, it indicates that the better crystallinity can effectively induce the increment of saturation magnetization.…”

Section: Resultssupporting

confidence: 65%

Tuning bandgap and surface wettability of NiFe2O4 driven by phase transition

Tong

Chi

Kung

et al. 2018

Sci Rep

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Stress variation induced bandgap tuning and surface wettability switching of spinel nickel ferrite (NiFe2O4, NFO) films were demonstrated and directly driven by phase transition via a post-annealing process. Firstly, the as-deposited NFO films showed hydrophilic surface with water contact angle (CA) value of 80 ± 1°. After post-annealing with designed temperatures ranged from 400 to 700 °C in air ambience for 1 hour, we observed that the crystal structure was clearly improved from amorphous-like/ nanocrystalline to polycrystalline with increasing post-annealing temperature and this phenomenon is attributed to the improved crystallinity combined with relaxation of internal stress. Moreover, super-hydrophilic surface (CA = 14 ± 1°) was occurred due to the remarkable grain structure transition. The surface wettability could be adjusted from hydrophilicity to super-hydrophilicity by controlling grain morphology of NFO films. Simultaneously, the saturation magnetization (Ms) values of NFO films at room temperature increased up to 273 emu/cm3 accompanied with transitions of the phase and grain structure. We also observed an exceptionally tunable bandgap of NFO in the range between 1.78 and 2.72 eV under phase transition driving. Meanwhile, our work demonstrates that direct grain morphology combined with the stress tuning can strongly modulate the optical, surface and magnetic characteristics in multifunctional NFO films.

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Section: Resultssupporting

confidence: 65%

Tuning bandgap and surface wettability of NiFe2O4 driven by phase transition

Tong

Chi

Kung

et al. 2018

Sci Rep

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“…De acordo com os difratogramas apresentados, observa-se que as amostras revelaram picos característicos da formação monofásica da estrutura cúbica do espinélio NiFe 2 O 4 (os picos 220, 311, 222, 400, 422, 511 e 440) [36,37], indicando que a síntese por reação de combustão foi eficiente para a formação completa da fase desejada, e que o processo de silanização não exerceu grande influência sobre estrutura do material, uma vez que seus picos mantiveram praticamente a mesma intensidade, porém com um pouco mais de ruído devido à presença do agente silano que possui característica de um material amorfo, e portanto, interfere na difração das partí-culas do pó, causando uma leve redução na intensidade dos picos, o que tende a interferir na cristalinidade das nanopartículas magnéticas. A reflexão mais intensa do plano (311) é característica da estrutura em espinélio inversa (JCPDS 86-2267), pertencente ao grupo espacial Fd3m [37][38][39].…”

Section: Resultados E Discussõesunclassified

Avaliação da formação do híbrido NiFe2O4@SiO2 e sua performance na imobilização da GOx

et al. 2018

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RESUMORecentes avanços tecnológicos na síntese e projeto de nanopartículas magnéticas (NPMs) vêm abrindo vários caminhos para o uso destes materiais em aplicações médicas e farmacêuticas, como biosensores, carreadores de fármacos, destruição de células tumorais e separação magnética de células e proteínas. Com vista nisso, foi proposto obter o híbrido de NiFe 2 O 4 @SiO 2 a partir da modificação da superfície da ferrita de níquel com 3-aminopropiltrietoxissilano, objetivando avaliar a sua formação a partir de suas propriedades estruturais, magnéticas e morfológicas, a fim de estudar a sua capacidade de imobilizar a glicose oxidase (GOx). As amostras foram analisadas por DRX, FTIR, MEV, BET/BJH, medidas magnéticas e testadas na reação de imobilização da GOx. Os resultados revelaram a formação monofásica do espinélio NiFe 2 O 4 com tamanho de cristalito de 35 e 32 nm para as amostras antes e após a modificação da superfície; presença de bandas de absorção características do espinélio e do grupo silanol do agente silano, confirmando formação do híbrido. A modificação de superfície melhorou a área superficial e o comportamento magnético das NPMs. O estudo demonstrou que a presença do agente silano não contribuiu para a imobilização da GOx.Palavras-Chave: Ferritas de níquel, nanopartículas magnéticas, agente silano, imobilização, biomaterial. ABSTRACTRecent technological advances in the synthesis and design of magnetic nanoparticles (MNPs) have opened up a slew of ways for the use of these materials in medical and pharmaceutical applications, such as biosensors, drug carriers, destruction of tumor cells, and magnetic separation of cells and proteins. In view of this, we propose to obtain the hybrid NiFe 2 O 4 @SiO 2 from the surface modification of the nickel ferrite with 3-aminopropyltriethoxysilane, aiming to evaluate its formation by its structural, morphological and magnetic properties, in order to test it for its performance in the immobilization of the glucose oxidase (GOx). The samples were analyzed through XRD, FTIR, SEM, BET/BJH, magnetic measurements and tested in the GOx immobilization. The results showed the single phase formation of the spinel NiFe 2 O 4 with crystallite size of 35 and 32 nm for the samples before and after surface modification and the presence of characteristic absorption bands for the spinel and the silanol group of the silane agent, confirming the formation of the hybrid. The surface modification improved the surface area and the magnetic behavior of the NPMs. The presence of the silane agent does not contribute for the GOx immobilization.

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“…Methods devised for preparation of magnesium ferrite nanocrystallites included the coprecipitation method [19,[25][26][27][28], sol-gel method [20,29], combustion method [30,31], hydrothermal method [32], thermal decomposition method [33], and solvothermal method [34]. Among the methods used to synthesize ferrite nanoparticles, the solution combustion synthesis is favored for its simplicity, short reaction time, and low annealing temperature [35]. ese advantages have made resulting ferrites to have fine particle size, reduced impurities, and improved physical properties [36].…”

Section: Introductionmentioning

confidence: 99%

“…ese advantages have made resulting ferrites to have fine particle size, reduced impurities, and improved physical properties [36]. In the combustion reaction, the fuels play the role of forming complexes with metal cations [35]. Frequently used fuels in previous studies included glycine, urea, citric acid, and EDTA (ethylene diammin tetraacetic acid).…”

Section: Introductionmentioning

confidence: 99%

A Facile Synthesis, Characterization, and Photocatalytic Activity of Magnesium Ferrite Nanoparticles via the Solution Combustion Method

Nguyen

Nguyễn

Chu

et al. 2019

Journal of Chemistry

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In this study, we adopted the solution combustion method to synthesize magnesium ferrite (MgFe2O4) using urea as the fuel. Various techniques including TGA, XRD, SEM, TEM, FTIR, UV-Vis DRS, and EDS were employed to characterize the synthesized MgFe2O4 nanoparticles. The XRD analysis revealed that single-phase MgFe2O4 was formed at a calcination temperature of at 500–600°C for 3 hours in the absence of an intermediate phase. TEM analysis also revealed the formation of monodisperse magnesium ferrite nanoparticles, averaged at 30 nm in size. The photocatalytic activity of the synthesized MgFe2O4 nanoparticles against methylene blue dye under visible light was investigated, showing the efficiency of 89.73% after 240 minutes of light irradiation with the presence of H2O2.

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Influence of the type of fuel used for the solution combustion synthesis on the structure, morphology and magnetic properties of nanosized NiFe2O4

Cited by 49 publications

References 45 publications

Tuning bandgap and surface wettability of NiFe2O4 driven by phase transition

Tuning bandgap and surface wettability of NiFe2O4 driven by phase transition

Avaliação da formação do híbrido NiFe2O4@SiO2 e sua performance na imobilização da GOx

A Facile Synthesis, Characterization, and Photocatalytic Activity of Magnesium Ferrite Nanoparticles via the Solution Combustion Method

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