期刊
RSC ADVANCES
卷 6, 期 103, 页码 101071-101078出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra20980g
关键词
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资金
- Ph. D Starting Foundation of Jiangxi Agricultural University [09004712]
- Jiangxi Provincial Department of Education Fund [GJJ150432]
Herein, TS-1, Cu incorporated TS-1 (Cu-TS-1) and TS-1 supported with different Cu contents (Cu/TS-1-x) are synthesized. The resultant catalyst samples are characterized via X-ray powder diffraction (XRD), nitrogen physical adsorption (N-2-adsorption), inductive coupling plasma optical emission spectrometry (ICP- OES), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflectance (UV-vis) spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier-transform infrared spectroscopy (FT-IR), and studied in the hydroxylation of phenol using H2O2 as the oxidant. The results reveal that the framework Ti content and particle diameter of the Cu/TS-1-x samples are almost the same as the untreated TS-1 sample, and that active Cu2+ species exist on the catalyst surface. However, the framework Ti of the Cu-TS-1 sample is lost and its particle size increases. This feature may be attributed to the fact that a small amount of Cu species is introduced into the TS-1 framework, which inhibits the formation of framework Ti. Furthermore, the Cu/TS-1-2 catalyst exhibits the best catalytic activity due to the existence of framework Ti and Cu2+ species which can promote the conversion of phenol. Furthermore, the phenol conversion of 49.77% and diphenol selectivity of 99.28% are obtained when phenol hydroxylation is carried out at 353 K for 3 h over this catalyst.
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