One-step synthesis of Mn3O4 nanoparticles: Structural and magnetic study

Vázquez-Olmos, A.; Redón, Rocı́o; Rodríguez‐Gattorno, Geonel; Mata-Zamora, M.E.; Morales, F.; Fernández-Osorio, A.; Sániger, José M.

doi:10.1016/j.jcis.2005.05.005

Cited by 164 publications

(86 citation statements)

References 30 publications

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“…The particle size and morphology may be controlled by using various methods including solvothermal/hydrothermal [10,11], vapor phase growth [12], vacuum calcining precursors [13], thermal decomposition [14], ultrasonic, gamma, and microwave irradiation [15][16][17], and chemical liquid homogeneous precipitation [18]. Therefore, Mn 3 O 4 compounds show distinct shapes including nanoparticles [19], nanorods [20], nanowires [21], and tetragonal particles [22].…”

Section: Introductionmentioning

confidence: 99%

Mn3O4 Nanoparticles: Synthesis, Characterization, and Dielectric Properties

Dhaouadi¹,

Ghodbane²,

Hosni

et al. 2012

ISRN Spectroscopy

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Mn 3 O 4 nanoparticles were prepared by a simple chemical route using cetyltetramethylammonium bromide (CTAB) as a template agent. Mn 3 O 4 nanocrystals present an octahedral shape, and their crystallite size varies between 20 and 80 nm. They were characterized by XRD, SEM, DTA/TG, and IR spectroscopy. XRD studies confirm the presence of a highly crystalline Mn 3 O 4 phase. The Rietveld refinement of the X-ray diffraction data confirms that Mn 3 O 4 nanoparticles crystallize in the tetragonal system with space group I41/amd. DTA/TG and XRD measurements demonstrate the phase transition toward a spinel structure between 25 and 700 • C. The electrical conductivity increases between 80 and 300 • C, suggesting a semiconducting behaviour of Mn 3 O 4 . Both dielectric dispersion (ε ) and dielectric loss (ε ) were investigated from 80 and 300 • C in the frequency range of 10 Hz-13 MHz. The dielectric properties showed typical dielectric dispersion based on the Maxwell-Wagner model.

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Section: Introductionmentioning

confidence: 99%

Mn3O4 Nanoparticles: Synthesis, Characterization, and Dielectric Properties

Dhaouadi¹,

Ghodbane²,

Hosni

et al. 2012

ISRN Spectroscopy

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“…In the FTIR spectrum of MnO 2 @SA/Mn beads (Figure 1(c)), the characteristic adsorption peaks of pure alginate hydrogel beads and MnO 2 were approximately maintained or even stronger. Moreover, an original peak at 1740 cm −1 probably caused by the absorption vibrations of the -COOH in alginate molecule [41,42] Figure 2, respectively. Figure 2(a) indicates that the surface of MnO 2 @SA/Mn hydrogel beads in a gel state is smooth and the bead has a black spherical shape with a diameter approximately 2.0 ± 0.2 mm; simultaneously the average diameter after freezing drying is about 1.5 ± 0.2 mm.…”

Section: Group Of the Alginate Chains And Mnmentioning

confidence: 99%

Efficient Absorption of Antibiotic from Aqueous Solutions over MnO₂@SA/Mn Beads and Their In Situ Regeneration by Heterogeneous Fenton-Like Reaction

Luo

Bai

Wang

et al. 2017

Journal of Nanomaterials

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Alginate has been extensively used as absorbents due to its excellent properties. However, the practical application of pure alginate has been restricted since the saturated adsorbent has weak physical structure and could not be regenerated easily. In this study, a lowcost and renewable composite MnO 2 @alginate/Mn adsorbent has been prepared facilely for the absorptive removal of antibiotic wastewater. FE-SEM, FTIR, and XRD analyses were used to characterize the samples. The norfloxacin (NOR) was used as an index of antibiotics. More specifically, the batch absorption efficiency of the adsorbents was evaluated by pH, contact time with different NOR concentration, and the temperature. Thus, the performance of absorption kinetic dynamics and isotherm equations were estimated for the adsorptive removal process. Parameters including Δ 0 , Δ 0 , and Δ 0 were utilized to describe the feasible adsorption process. To regenerate the saturated absorptive sites of the adsorbent, the heterogeneous Fenton-like reactions were trigged by introduction of H 2 O 2 . The results showed that the in situ regenerating has exhibited an excellent recycling stability. The high activity and the simple fabrication of the adsorbents make them attractive for the treatment of wastewater containing refractory organic compound and also provide fundamental basis and technology for further practical application.

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“…Several methods are reported in the literature for the synthesis of manganese oxides, among which hydrothermal synthesis [13], thermal decomposition of KMnO 4 [14], sol-gel method [5] and others [11,15]. The route investigated in this work is the comparison between two different methods: co-precipitation [16] and Solution Combustion Synthesis [17], which is an innovative and cheap alternative to consolidated methods allowing to obtain high purity single and mixed oxides characterized by high values of specific surface area and able to give a wide variety of morphologies and oxidation states by changing the operative parameters.…”

Section: Introductionmentioning

confidence: 99%