Hydrothermal Glucose Modified C/V-SiO2 as a Reusable Heterogeneous Catalyst for Benzene Oxidation to Phenol by O2

作者：Gao, Ya; Gao, Yuan; Shi, Lei; Sun, Qi^*

来源：Catalysis Letters, 2017, 147(11): 2799-2806.

DOI：10.1007/s10562-017-2198-y

• Benzene hydroxylation
• Vanadium
• Hydrothermal synthesis
• Oxygen
• Phenol

The C/V-SiO2 samples were synthesized by the hydrothermal treatment of aqueous glucose and V-SiO2 that was pre-prepared by a sol-gel process. The samples were characterized by XRD, XPS, EPR, FT-IR, SEM, N-2 adsorption-desorption. The results showed that in the hydrothermal process the V-SiO2 was covered by a rod-like carbonization material, and a small portion of V5+ species was reduced to V4+. The activity of the C/V-SiO2 in benzene hydroxylation with O-2 was tested. The leaching of V from the C/V-SiO2 during the reaction was restrained because the surface of the V-SiO2 was covered with the carbonization material. The phenol selectivity of 100% and benzene conversion of 10.8% over C/V(3.9)-SiO2 were obtained, and the catalytic performance did not decreased after being recycled three times. @@@ The leaching of V from the C/V-SiO2 was restrained in the hydroxylation of benzene with O-2 because the surface of V-SiO2 was covered with the carbonization material.

• 出版日期2017-11
• 单位辽宁师范大学