Direct Hydroxylation of Benzene to Phenol Over Mixed-Crystal Particles of Mesoporous VO x /TiO2 Catalyst Mixed-Crystal VO x /TiO2 for Benzene Hydroxylation

Xu, Dongwei; Jia, Lei; Guo, Xiangfeng

doi:10.1007/s10562-012-0887-0

Cited by 22 publications

(9 citation statements)

References 54 publications

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“…In addition, the pore properties were investigated using high-resolution TEM Fig. S3b , the pores can be seen as black spots, with a wormhole framework can be observed on the sample surface 32,33 . These results are well consistent with the N 2 adsorptiondesorption isotherms and SEM analysis.…”

Section: Temmentioning

confidence: 99%

Facile and Low-cost Synthesis of Mesoporous Ti–Mo Bi-metal Oxide Catalysts for Biodiesel Production from Esterification of Free Fatty Acids in <i>Jatropha curcas</i> Crude Oil

Zhang

Yang

2018

J. Oleo Sci.

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Mesoporous Ti-Mo bi-metal oxides with various titanium-molybdenum ratios were successfully fabricated via a facile approach by using stearic acid as a low-cost template agent. thermal gravity (TG) /differential scanning calorimetry (DSC) analysis, X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, nitrogen adsorption-desorption isotherm, NH temperature-programmed desorption (NH-TPD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) measurements indicated these materials possessing mesoporous structure, sufficient pore size and high acid intensity. The catalytic performance of prepared catalysts was evaluated by esterification of free fatty acids in Jatropha curcas crude oil (JCCO) with methanol. The effects of various parameters on FFA conversion were investigated. The esterification conversion of 87.8% was achieved under the condition of 180°C, 2 h, methanol to JCCO molar ratio of 20:1 and 3.0 wt.% catalyst (relative to the weight of JCCO). The mesoporous catalysts were found to exhibit high activities toward the simultaneous esterification and transesterification of JCCO. Furthermore, the catalyst could be recovered with a good reusability.

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Section: Temmentioning

confidence: 99%

Facile and Low-cost Synthesis of Mesoporous Ti–Mo Bi-metal Oxide Catalysts for Biodiesel Production from Esterification of Free Fatty Acids in <i>Jatropha curcas</i> Crude Oil

Zhang

Yang

2018

J. Oleo Sci.

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“…In our laboratory, we have prepared VOx-TiO2 catalysts and used them for the hydroxylation of benzene to phenol with H2O2 as the oxidant in acetonitrile. The yield of phenol achieved was 23.8% with a selectivity of 85% under optimized conditions [26].…”

Section: Introductionmentioning

confidence: 95%

“…In the reaction using H2O2 as the oxidant, different peroxide intermediates can be formed with various metal oxides. The metal and H2O2 can form a metal-peroxo transition state after losing a water molecule, and then the metal-peroxo combine with benzene to complete the hydroxylation reaction [21,26,49,50]. After doping with the copper species, Cu 2+ species exist as auxiliary species in the catalyst that promoted the catalytic activity of the Cu/VOx-TiO2 catalyst.…”

Section: Catalytic Properties For the Hydroxylation Of Benzenementioning

confidence: 99%

“…研究表明, V 2 O 5 的加入可明显降低 TiO 2 的晶相转化温度 [24] ; 因为 VO x 的负载能够增大 TiO 2 由锐钛矿相向金红石转化的核心的表面密度, 当钒物种单分散于载体 TiO 2 上时, 催化剂表现出较好的催化活性 [25] . 本课题组已经成功制备了 VO x -TiO 2 催化剂, 并用于液相苯直接羟基化制苯酚的反应, 以 H 2 O 2 为氧化剂, 乙腈为溶剂, 最佳的反应条件下, 苯酚的收率和选择性分别为 23.8% 和 85% [26] . 用于苯直接羟基化反应有很多单负载过渡金属 (Fe, Cu, V 等) 的催化剂, 但是催化效果均不太理想 [27~29] [22,26] .…”

Section: Graphical Abstractunclassified

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Cu-doped mesoporous VOx-TiO2 in catalytic hydroxylation of benzene to phenol

Xu¹,

Jia²,

Guo³

2013

Chinese Journal of Catalysis

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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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Direct Hydroxylation of Benzene to Phenol Over Mixed-Crystal Particles of Mesoporous VO x /TiO2 Catalyst Mixed-Crystal VO x /TiO2 for Benzene Hydroxylation

Cited by 22 publications

References 54 publications

Facile and Low-cost Synthesis of Mesoporous Ti–Mo Bi-metal Oxide Catalysts for Biodiesel Production from Esterification of Free Fatty Acids in <i>Jatropha curcas</i> Crude Oil

Facile and Low-cost Synthesis of Mesoporous Ti–Mo Bi-metal Oxide Catalysts for Biodiesel Production from Esterification of Free Fatty Acids in <i>Jatropha curcas</i> Crude Oil

Cu-doped mesoporous VOx-TiO2 in catalytic hydroxylation of benzene to phenol

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

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