Details

Autor(en) / Beteiligte

• Xu, Jie
• Chen, Ye
• Hong, Ying
• Zheng, Huan
• Ma, Dan
• Xue, Bing
• Li, Yong-Xin

Titel

Direct catalytic hydroxylation of benzene to phenol catalyzed by vanadia supported on exfoliated graphitic carbon nitride

Ist Teil von

• Applied catalysis. A, General, 2018, Vol.549, p.31-39

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •G-C3N4 materials treated by exfoliation and protonation procedures.•Simpler and more eco-friendly method than that applied for mesoporous g-C3N4.•Protonation increased the percentage of terminal amino groups.•Vanadia supported on peg-C3N4 showed superior activity to those on pristine g-C3N4. Direct hydroxylation of benzene is a sustainable and promising strategy to synthesize phenol. The key topic for the catalytic process is the development of an efficient heterogeneous catalyst. In this work, graphitic carbon nitride (g-C3N4) material was exfoliated and protonated, and then utilized as a support to load vanadia by using VO(acac)2 as a precursor. The synthesized materials were characterized by several techniques including N2 adsorption–desorption, XRD, TG, TEM, SEM, FT-IR, UV–vis, and XPS. The results exhibited that the exfoliation as a simple method could improve the surface area and pore volume of g-C3N4, while protonation was able to facilitate to increase the loading amount of vanadia. In hydroxylation of benzene to phenol in the presence of H2O2, the vanadia catalysts supported on peg-C3N4 demonstrated superior catalytic activity to the catalysts supported on the pristine g-C3N4. Moreover, the effects of protonation conditions including acid concentration and temperature on the final catalytic activity have also been investigated. Under optimized conditions, a maximum yield of phenol reached 15% at 60°C.