Preparation of Mn3O4 nanocrystallites by low-temperature solvothermal treatment of γ-MnOOH nanowires

Zhang, Yongcai; Qiao, Tao; Hu, Xiao

doi:10.1016/j.jssc.2004.05.034

Cited by 116 publications

(69 citation statements)

References 33 publications

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“…Tetramanganese oxides (Mn 3 O 4 ) are particularly used as main sources of ferrite materials [5] and applied in numerous industrial fields such as magnetic [6], electrochemical [7], and catalysis [8,9]. 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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“…The peak at 642.7 eV can be assigned to Mn 2p 3/2 corresponding to Mn 3+ and 48 eV can be assigned to 3p 3/2 electronic state [14]. Spin orbit splitting between Mn 3p 1/2 and Mn 2p 3/2 is 11.8 eV which is nearer to literature reports [7].The binding energies at the Mn 2p 3/2 and Mn 2p 1/2 peaks agree well with that of reported for Mn 3 O 4 indicating oxidation state for Mn [5]. …”

Section: Experimental Procedures 21 Synthesis Of Manganese Oxide Nanomentioning

confidence: 60%

“…Figure 4 (a&b) shows the micro-Raman spectra of as synthesized and annealed nanoparticles respectively. As synthesized nanoparticles exhibits three phonon peaks at (doubly degenerate) T 2g symmetry mode at 366 cm - [7]. Annealed nanoparticles shows four phonon peaks same as synthesized particles with one extra band T 2g symmetry mode at 487 cm -1 which may be due to the out of plane bending mode of Mn 2 O 3 phase.…”

Section: Functional Studiesmentioning

confidence: 71%

“…Mn 3 O 4 is an important transition metal oxide due to its extensive applications in magnetic [1], electrochemical [2], Li ion batteries [3], catalytic applications [4], supercapacitors [5] and dilute magnetic semiconductor [6]. Mn 3 O 4 nanoparticles have been synthesized in several methods like hydrothermal [7], combustion method [8], microwave assisted solution method [9], and co precipitation method [10]. In this report, we have attempted to optimize Mn 3 O 4 nanoparticles by facile coprecipitation method as it is simple and cost effective technique.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and Study on Structural, Morphological and Magnetic properties of nanocrystalline Manganese Oxide

Shrividhya¹,

Ravi²,

Mahalingam³

et al. 2013

IJSEA

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Mn 3 O 4 nanoparticles were prepared by co-precipitation method followed by annealing of samples at 300 °C for 2 hours. The samples were characterized to find the structural, functional, optical, morphological, compositional and magnetic properties by PXRD, FTIR, Micro-Raman, HRSEM, TEM, XPS, EDX and VSM respectively. Structural studies by PXRD indicate that the annealing has strongly influenced the phase transition showing two coexisting phases of Mn 2 O 3 and Mn 3 O 4 . Micro-Raman spectra showed the presence of A 1g mode of vibration corresponding to Mn 3 O 4 phase. Magnetic studies of the as synthesized Mn 3 O 4 nanoparticles depict paramagnetic behavior at room temperature.

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“…In recent years, different precipitation approaches based on hydrothermal or solvothermal methods have been reported [13,14]. This allows synthesis at a far lower temperature than calcination but it requires a long reaction time (48 to 72 h) at elevated temperature and pressures.…”

Section: Introductionmentioning

confidence: 99%

Low temperature synthesis and characterization of Mn3O4 nanoparticles

2007

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Heating hydrous manganese (II) hydroxide gel at 85• C for 12 hours produces Mn 3 O 4 nanoparticles. They were characterized by X-ray powder diffraction (XRD) and infrared spectroscopy (FTIR). The particle size estimated from the SEM and X -ray peak broadening is approximately 32 nm, showing them to be nanocrystalline. EPR measurements confirm a typical Mn 2+ signal with a highly resolved hyperfine structure.

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Preparation of Mn3O4 nanocrystallites by low-temperature solvothermal treatment of γ-MnOOH nanowires

Cited by 116 publications

References 33 publications

Mn3O4 Nanoparticles: Synthesis, Characterization, and Dielectric Properties

Mn3O4 Nanoparticles: Synthesis, Characterization, and Dielectric Properties

Synthesis and Study on Structural, Morphological and Magnetic properties of nanocrystalline Manganese Oxide

Low temperature synthesis and characterization of Mn3O4 nanoparticles

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