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APPLIED CATALYSIS A-GENERAL · 2013 · IF 3.41

Direct synthesis of phenol from benzene catalyzed by multi-V-POMs complex

Hua Yang,Qing Wu,Jun Li,Wen Dai,Hengyun Zhang,Dan Lu,Shuang Gao,Wansheng You

A novel catalyst, [Mo 2 V 2 O 9 (bpy) 6 ][PMo 11 VO 40 ], was synthesized by the self-assembling of [PMo 11 VO 40 ] 4− and [Mo 2 V 2 O 9 (bpy) 6 ] 4+ unit and characterized by elemental analyses, TG, IR, X-ray powder diffraction and X-ray single crystal diffraction. [Mo 2 V 2 O 9 (bpy) 6 ][PMo 11 VO 40 ] with multi-isolated active sites showed good catalytic activities for hydroxylation of benzene to phenol . A high yield of phenol (25.5%) with selectivity to phenol of 90.7% was obtained using H 2 O 2 as oxidant. The catalyst can be recycled for 5 times while its structure was unchanged and its catalytic activity was maintained.

CAS / MDL: 67-68-5 126-33-0 75-59-2

研究领域: 化学 · 催化材料科学

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CHINESE JOURNAL OF CHEMISTRY · 2014 ·Vol. 32 ·期 6 ·498-506 · IF 1.04

Synthesis of Ferrocene-Modified Carbon Nitride Photocatalysts by Surface Amidation Reaction for Phenol Synthesis

Xiangju Ye,Yun Zheng,Xinchen Wang

A polymeric Fc-CO-NH-C 3 N 4 (Fc-CN) material was synthesized by amidation reaction of ferrocenecarboxylic acid (Fc-COOH) with NH 2 groups on the surface of mesoporous graphitic carbon nitride (MCN). The properties of the as-synthesized samples were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, UV-Vis diffuse reflectance spectra, N 2 adsorption-desorption isotherm, photoluminescence spectroscopy, transmission electron microscopy, electron paramagnetic resonance, (photo)electrochemical measurement and X-ray photoelectron spectroscopy. The resultant catalysts were investigated as heterogeneous catalysts for the selective oxidation of benzene to phenol using H 2 O 2 as a green oxidant under visible light irradiation. The results reveal that Fc-modified samples can not only extend the visible light absorption, but also accelerate the bulk-to-surface charge transfer and separation via surface dyadic structures, both of which are favorable for phenol production from benzene photocatalytic hydroxylation with H 2 O 2 . Under the optimal conditions, up to 16.9 % phenol yield (based on benzene) is obtained by Fc-CN /1.5 -5 sample, and the corresponding Fe content is about 0.64 wt%. Furthermore, after the second run, no significant decrease of the activity (in term of TOF) and the selectivity is found in Fc-CN /1.0 -5 sample. Combined with the experimental results and Fenton-chemistry, a possible photocatalytic reaction mechanism on the hydroxylation of benzene to phenol at neutral medium with visible light is proposed.

CAS / MDL: 79-37-8

研究领域: 材料科学 · 环境科学 · 化学工程

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Direct synthesis of phenol from benzene catalyzed by multi-V-POMs complex

Synthesis of Ferrocene-Modified Carbon Nitride Photocatalysts by Surface Amidation Reaction for Phenol Synthesis