Synthesis, structure and magnetic property of a new organo-templated mixed-valent iron(ii, iii) borophosphate

Yang, Weiting; Li, Jiyang; Pan, Qinhe; Xing, Hongzhu; Chen, Yan; Yu, Jihong; Xu, Ruren

doi:10.1039/b820130g

Cited by 16 publications

(6 citation statements)

References 30 publications

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“…Also, it may offer a new possibility for tailoring magnetic properties of molybdenum oxide nanocomposites, leading to potential applications in superior soft magnetic materials. [43][44][45][46][47]…”

Section: Formation and Characterization Of Moo 2 Nanoparticlesmentioning

confidence: 99%

Molybdenum oxide nanoparticles: preparation, characterization, and application in heterogeneous catalysis

et al. 2011

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An adduct behaviour of ammonium molybdate tetrahydarte (AMT) with polytetrafluoroethylene (PTFE) resulted in three significant benefits: (a) a much lower degradation temperature (DT m , 82 K) of the PTFE in the adduct and a much lower final residual mass (DRM, 39%) of the adduct compared to the theoretical prediction, (b) the formation of MoO 3 and MoO 2 nanoparticles, and (c) the shuttleshaped MoO 2 nanoparticles coated with graphite exhibits superior soft magnetic property. The much earlier degradation suggested that there was a strong mutual effect between AMT and PTFE. The much lower residual mass implied that the intervention of a chemical reaction was responsible for the effect in nitrogen. Actually, Raman spectra revealed that the adducted PTFE was degraded into a graphite structure at this atmosphere, and the presence of the graphite layer led to the reduction of AMT into shuttle-shaped MoO 2 nanoparticles at 837 K to a complete extent. Controlled sintering measurements in air indicated that the AMT in the presence of PTFE produced a-MoO 3 nanoparticles, instead of MoO 2 . Further, our results indicated that the MoO 3 nanoparticles obtained had a positive response to the heterogeneous catalytic oxidation of thiophene in the presence of hydrogen peroxide. We believe that the present work is not only of relevance for applications in the degradation of polymer materials, but also will attract the attention of many groups studying the preparation and magnetic properties of transition metal oxide nanoparticles and their practical application in heterogeneous catalytic reactions.

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Section: Formation and Characterization Of Moo 2 Nanoparticlesmentioning

confidence: 99%

Molybdenum oxide nanoparticles: preparation, characterization, and application in heterogeneous catalysis

et al. 2011

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“…Borophosphates as a branch of phosphate-based microporous materials have been extensively investigated in the last decades due to their fascinating structural chemistry and interesting properties in optical [12] and magnetic aspects [13,14]. From the structural point of view, boron atom has both triangular and tetrahedral coordination geometries.…”

Section: Introductionmentioning

confidence: 99%

Role of boron-containing ionic liquid in the synthesis of manganese borophosphate with extra-large 16-ring pore openings

Yang

Yan

et al. 2012

Microporous and Mesoporous Materials

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“…3), at 380 ∘ C, shows the important presence of Fe 3+ , in oxides as maghemite (17% relative area, according to hyperfine parameter not shown), goethite (29%) and superparamagnetic iron(III) oxide (43%). The spectrum also presents a typical doublet of octahedral Fe 2+ , 36 with 11% relative area.…”

Section: Resultsmentioning

confidence: 97%

Preparation of magnetic mesoporous composites from glycerol and iron(III) salt

Medeiros

Ardisson

Lago

2019

J of Chemical Tech & Biotech

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BACKGROUND A process was developed to produce mesoporous composites with magnetic cores involving the following sequential reactions: glycerol polymerization/iron(III) reduction/polyglycerol pyrolysis/activated carbon production. RESULTS Glycerol containing 1, 3, 5, or 8 mol% iron(III) was heat treated to 380, 600, or 800 °C. The scanning electron microscopy (SEM), transmission electron microscopy (TEM), X‐ray diffraction, Mössbauer spectroscopy, thermogravimetry/differential thermal analysis, Raman spectroscopy, and nitrogen adsorption/desorption results showed that the iron(III) salt promoted polymerization of glycerol up to 380 °C. At higher temperatures, up to 800 °C, three different processes simultaneously occurred: pyrolysis of polyglycerol, reduction of iron(III) ion (Fe3+) to Fe0 and Fe3C, and activation of the carbonaceous matrix, yielding a composite with a BET surface area of 136 m2 g−1. Moreover, to verify a possible environmental application of the prepared composites and their ability to remain suspended in aqueous solution, they were tested as adsorbents of organic contaminants such as methylene blue and indigo carmine. The test results were satisfactory: 10 mg of the prepared composite (GFe3‐800) adsorbed up to 80% of the dye [10 mL of solution (50 ppm)] within 30 min of contact, and the composite could be removed from the system by simple magnetic attraction. CONCLUSIONS Magnetic composites exhibited good dye adsorption, in addition, good resistance to acid leaching. © 2019 Society of Chemical Industry

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Synthesis, structure and magnetic property of a new organo-templated mixed-valent iron(ii, iii) borophosphate

Cited by 16 publications

References 30 publications

Molybdenum oxide nanoparticles: preparation, characterization, and application in heterogeneous catalysis

Molybdenum oxide nanoparticles: preparation, characterization, and application in heterogeneous catalysis

Role of boron-containing ionic liquid in the synthesis of manganese borophosphate with extra-large 16-ring pore openings

Preparation of magnetic mesoporous composites from glycerol and iron(III) salt

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