期刊
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
卷 2022, 期 7, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202100943
关键词
Hematite nanoparticles; Heterogeneous catalysis; Magnetic properties; Nitroarenes; Transfer hydrogenation
资金
- Politecnico di Bari within the CRUI-CARE Agreement
Weakly magnetic hematite nanoparticles were synthesized at 400 degrees C and proved to be an efficient and recyclable catalyst for the hydrogenation of nitroarenes.
Weakly magnetic hematite (alpha-Fe2O3) nanoparticles were synthesized by heating an amorphous polymer supported iron(III) complex (Fe_POL) at 400 degrees C for 4 h in air. The growth of nanoparticles (NPs) was studied by PXRD, heating the polymer from 150 degrees C to 400 degrees C at 25 degrees C intervals, revealing that, at all temperatures, the only crystalline phase detected is hematite. Conversely, annealing of Fe_POL at 400 degrees C for 4 h under nitrogen, yielded a material containing wustite (FeO) as the only crystalline phase, supported onto pyrolised acrylamidic polymer. The synthesized materials were characterized by TXRF, PXRD, SEM-EDS, XPS, Raman and FTIR spectroscopy as well as by magnetic analysis. Differently from natural micrometric hematite, synthesised nano-hematite turned out to be an efficient and recyclable catalyst for the hydrogenation of nitroarenes to the corresponding anilines.
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