Facile one-pot synthesis of VxOy@C catalysts using sucrose for the direct hydroxylation of benzene to phenol

Wang, Weitao; Ding, Guodong; Jiang, Tao; Zhang, Peng; Wu, Tianbin; Han, Buxing

doi:10.1039/c3gc00084b

Cited by 68 publications

(64 citation statements)

References 46 publications

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“…Meanwhile, a broad weak peak corresponding to the (002) reflection of laminated RGO sheets is observed at around 23.5˝ [38]. In addition, no typical peaks of the vanadium oxide can be seen in the pattern of VG-as, which may be due to the high dispersion of VO x species on the RGO sheets [33]. The VG-A300 and VG-N-A300 exhibit a prominent diffraction peak at around 25.1˝, which is corresponding to the (002) reflection of graphite-like stacking of RGO sheets [39].…”

Section: Synthesis and Characterization Of Vo X /Rgo Compositesmentioning

confidence: 94%

“…Nowadays, the vanadium oxide/carbon composites have attracted increasing attentions. The V x O y @C [33], VO 2 -defacts/MWCNTs [34], and V/GO materials [35] have shown good performance in the hydroxylation of benzene to phenol. The high specific surface areas, hydrophobic surface, and carbon defect active sites were found to be facilitative for the adsorption and activation of benzene, as well as the enhancement of catalytic activity of catalysts [27,31,35].…”

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

et al. 2016

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Abstract:The vanadium oxide/reduced graphene oxide (VO x /RGO) composites have been prepared by a simple solvothermal method with the assistance of cationic surfactant cetyltrimethylammonium bromide (CTAB). The microstructure and morphology of the resultant VO x /RGO composites have been well characterized. The VO x nanoparticles are highly dispersed on the RGO sheets with a particle size of about 25 nm. When used as hydroxylation catalysts, the VO x /RGO composites are more efficient than individual RGO and vanadium oxide catalysts. The enhanced catalytic performance may be related to not only the well dispersed VO x active species, but also the hydrophobic surface and huge π-electron system of RGO for the adsorption and activation of benzene. In addition, the effects of calcination conditions on the microstructure and catalytic properties of VO x /RGO composites have also been investigated. The uniform VO x nanoparticles on the separated RGO sheets show highly efficient catalytic performance, while the formation of aggregated H x V 2 O 5 and bulk V 2 O 5 species along with the destruction of RGO sheets are poor for the hydroxylation of benzene. Up to 17.4% yield of phenol is achieved under the optimized catalytic reaction conditions.

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Section: Synthesis and Characterization Of Vo X /Rgo Compositesmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

et al. 2016

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“…27 Aer then, the Cu ion-exchanged HPMCM-41 catalysts were proved to be more active than the corresponding Cu catalysts supported on SiO 2 , TiO 2 , MgO, or NaY, even though with less than the phenol yield of 2%. 36 The catalysts showed good catalytic performance for the title reaction using oxygen as oxidant with a phenol yield of 12.2%. Moreover, the yield of phenol over CuO-Al 2 O 3 and Cu-Al 2 O 3 catalysts prepared by Tsuruya et al in different methods in the similar catalytic system were 1.25% and 2.5%, respectively.…”

Section: Introductionmentioning

confidence: 96%

High-performance recyclable V–N–C catalysts for the direct hydroxylation of benzene to phenol using molecular oxygen

et al. 2015

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In this report, high-performance recyclable V-N-C catalysts for the direct hydroxylation of benzene to phenol using molecular oxygen were designed and prepared. Up to 12.6% yield of phenol with selectivity as high as 97.8% was achieved employing V-N-C-600 catalyst in acetonitrile. The catalytic recycling tests demonstrated that the V-N-C-600 catalyst exhibited high potential for reusability. The catalysts were characterized systematically by thermogravimetric analysis, Fourier transform infrared spectroscopy, N 2 adsorption-desorption, powder X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy techniques and scanning electron microscopy. It was determined that the interaction between surface nitrogen of the supports and reactive vanadium species played an important role in the excellent stability in recycling of the heterogeneous V-N-C catalysts.

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“…Various supported vanadium catalysts, such as V/SiO 2 [10], VxOy@C [11], V-AlPO 5 [12] VOx/SBA-15 [13], VOx/TiO 2 [14], V-SBA-16 [15] and VO 2 -defects/ MWCNT [16] have been developed. The dispersed vanadium species would be easily released from the supports in acetic acid aqueous solution that is the most commonly used solvent for this reaction [17], and as a result, the catalysts exhibited poor catalytic stability [18].…”

Section: Introductionmentioning

confidence: 99%

Liquid phase hydroxylation of benzene to phenol over vanadyl acetylacetonate supported on amine functionalized SBA-15

Bao

Jiang

Xing

et al. 2015

Reac Kinet Mech Cat

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An efficient catalyst for the direct hydroxylation of benzene to phenol with oxygen as the oxidant was developed by immobilizing the homogeneous vanadyl(IV) acetylacetonate (VO(acac) 2 ) on SBA-15 in which the support surface was functionalized by (3-aminopropyl)triethoxysilane. The as-prepared catalyst was characterized by various techniques including field-emission scanning electron microscopy, X-ray diffraction, nitrogen adsorption and desorption, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy. The results show that the homogeneous vanadium species can be successfully immobilized on the amine functionalized SBA-15 and exhibits better catalytic performance in the hydroxylation of benzene with oxygen compared to other catalysts reported in the literature. The phenol yield significantly depends on the reaction conditions. Under the optimized reaction conditions, the phenol yield can reach 13.3 %, and the asfabricated V/NH 2 -SBA-15 shows better stability against leaching owning to strong interaction between vanadium atoms and amine group as compared to the V/SBA-15 sample.

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Facile one-pot synthesis of VxOy@C catalysts using sucrose for the direct hydroxylation of benzene to phenol

Abstract: V x O y @C catalysts were prepared from sucrose and NH 4 VO 3 by a one-pot hydrothermal method. They showed satisfactory catalytic performance for the hydroxylation of benzene to phenol in acetonitrile using oxygen as the oxidant.

Cited by 68 publications

References 46 publications

Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

Facile Synthesis of Vanadium Oxide/Reduced Graphene Oxide Composite Catalysts for Enhanced Hydroxylation of Benzene to Phenol

High-performance recyclable V–N–C catalysts for the direct hydroxylation of benzene to phenol using molecular oxygen

Liquid phase hydroxylation of benzene to phenol over vanadyl acetylacetonate supported on amine functionalized SBA-15

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