Ultrathin γ-Fe2O3 nanosheets as a highly efficient catalyst for the chemoselective hydrogenation of nitroaromatic compounds

Cui, Xueliang; Zhou, Xia; Dong, Zhengping

doi:10.1016/j.catcom.2018.01.015

Cited by 18 publications

(12 citation statements)

References 31 publications

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“…[45] To date, the use of nanohematite as catalyst for the hydrogenation of nitroarene has been only seldom described [46] and, in any case, nano-structured α-Fe 2 O 3 has been demonstrated to be less active than γ-Fe 2 O 3 and Fe 3 O 4 nanoparticles under hydrogen pressure (30 bar) at 150 °C. [47] Negligible activity of pure (not nanometric) α-Fe 2 O 3 in nitroarene reduction has been reported by Dong [48] when hydrazine hydrate was used as the reductant.…”

Section: Catalytic Testsmentioning

confidence: 95%

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Synthesis and Use in Catalysis of Hematite Nanoparticles Obtained from a Polymer Supported Fe(III) Complex

et al. 2022

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Dedicated to Prof. Rinaldo Poli on occasion of his 65th birthday.Weakly magnetic hematite (α-Fe 2 O 3 ) nanoparticles were synthesized by heating an amorphous polymer supported iron(III) complex (Fe_POL) at 400 °C for 4 h in air. The growth of nanoparticles (NPs) was studied by PXRD, heating the polymer from 150 °C to 400 °C at 25 °C intervals, revealing that, at all temperatures, the only crystalline phase detected is hematite. Conversely, annealing of Fe_POL at 400 °C for 4 h under nitrogen, yielded a material containing wüstite (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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Section: Catalytic Testsmentioning

confidence: 95%

“…After 3 h, negligible yield in p-bromonitroaniline was obtained (entry 5), confirming results reported by Dong. [48] The difference in catalytic performance between natural hematite and Hem_400_Air may then be ascribed to the particle size and shape: nanometric spheres in Hem_400_Air, micrometric plates in natural hematite (Figure S7).…”

Section: Catalytic Testsmentioning

confidence: 99%

Synthesis and Use in Catalysis of Hematite Nanoparticles Obtained from a Polymer Supported Fe(III) Complex

et al. 2022

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Section: Heterogeneous Iron-based Catalystsmentioning

confidence: 99%

Reduction of Nitro Compounds Using 3d-Non-Noble Metal Catalysts

et al. 2018

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The reduction of nitro compounds to the corresponding amines is one of the most utilized catalytic processes in the fine and bulk chemical industry. The latest development of catalysts with cheap metals like Fe, Co, Ni and Cu has led to their tremendous achievements over the last years prompting to their greater application as "standard" catalysts. In this review we will comprehensively discuss the use of homogeneous and heterogeneous catalysts based on non-noble 3d-metals for the reduction of nitro compounds using various reductants. The different systems will be revised considering both the catalytic performances and synthetic aspects highlighting also their advantages and disadvantages.

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“…9 Heterogeneous catalysts use hydrogen gas for producing anilines from nitrobenzene. 10,11 However, the reaction requires high temperature and high pressure in these processes. A key point is expected to enhance both conversion efficiency and selectivity of anilines because the nitrogen− oxygen (N−O) bond is relatively difficult to break.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Anilines are critical substances or reaction intermediates in chemical production. , As the most important intermediate product for manufacture of dyestuffs, medicaments, and insecticides, anilines are commercialized by hydrogenation of nitrobenzene with metal catalysts Ni, Cu, Pd, and Pt . Heterogeneous catalysts use hydrogen gas for producing anilines from nitrobenzene. , However, the reaction requires high temperature and high pressure in these processes. A key point is expected to enhance both conversion efficiency and selectivity of anilines because the nitrogen–oxygen (N–O) bond is relatively difficult to break.…”

Section: Introductionmentioning

confidence: 99%

Monolayer Bi₂W_1–xMo_xO₆ Solid Solutions for Structural Polarity to Boost Photocatalytic Reduction of Nitrobenzene under Visible Light

Xie

Liú

Wang

et al. 2021

ACS Sustainable Chem. Eng.

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Monolayer nanosheets of Bi2W1–x Mo x O6 solid solutions, possessing an average thickness of 0.98 nm, have been rationally designed and constructed by a facile bottom-up route of a hydrothermal reaction. The tiptop photocatalytic efficiency of Bi2W1–x Mo x O6 monolayer nanosheets can be achieved for effective reduction conversion of nitrobenzene into anilines under visible light, in conspicuous contrast to the homologous pristine Bi2WO6 and Bi2MoO6 components. The optimal Bi2W0.25Mo0.75O6 monolayer nanosheets exhibit a high selectivity and stability for photocatalytic nitrobenzene reduction, affording a high aniline generating rate of 650 μmol g–1.h–1, in excess of the previously reported ordinary photocatalysts. The good photocatalytic property could be due to the lattice distortion in solid solutions for structural polarity by the more electronegative W substitution, leading to the efficient interfacial and interior separation of photogenerated carriers. The structure–activity relationship of Bi2W1–x Mo x O6 demonstrates a novel insight to devise property-controllable photocatalysts at the atomic level with high efficiency for organic photocatalytic reactions.

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Ultrathin γ-Fe2O3 nanosheets as a highly efficient catalyst for the chemoselective hydrogenation of nitroaromatic compounds

Cited by 18 publications

References 31 publications

Synthesis and Use in Catalysis of Hematite Nanoparticles Obtained from a Polymer Supported Fe(III) Complex

Synthesis and Use in Catalysis of Hematite Nanoparticles Obtained from a Polymer Supported Fe(III) Complex

Reduction of Nitro Compounds Using 3d-Non-Noble Metal Catalysts

Monolayer Bi₂W_1–xMo_xO₆ Solid Solutions for Structural Polarity to Boost Photocatalytic Reduction of Nitrobenzene under Visible Light

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Ultrathin γ-Fe2O3 nanosheets as a highly efficient catalyst for the chemoselective hydrogenation of nitroaromatic compounds

Cited by 18 publications

References 31 publications

Synthesis and Use in Catalysis of Hematite Nanoparticles Obtained from a Polymer Supported Fe(III) Complex

Synthesis and Use in Catalysis of Hematite Nanoparticles Obtained from a Polymer Supported Fe(III) Complex

Reduction of Nitro Compounds Using 3d-Non-Noble Metal Catalysts

Monolayer Bi2W1–xMoxO6 Solid Solutions for Structural Polarity to Boost Photocatalytic Reduction of Nitrobenzene under Visible Light

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Product

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About

Monolayer Bi₂W_1–xMo_xO₆ Solid Solutions for Structural Polarity to Boost Photocatalytic Reduction of Nitrobenzene under Visible Light