多级孔钛硅分子筛制备及其催化羟基化性能

doi:10.11962/1006-4990.2018-0565

Abstract

Abstract:

Hierarchical titanium silicalite-1（h-TS-1） was synthesized by sol-gel method with cetyltrimethyl-ammonium bromide（CTAB） as mesopores template.Structural features of the h-TS-1 were characterized by transmission electron microscope（TEM）,X-ray diffraction（XRD）,N₂ adsorption-desorption,ultraviolet-visible diffuse reflectance spectroscopy（DR UV-vis） and Fourier transform infrared spectroscopy（FT-IR）.Catalytic performance of the h-TS-1 was investigated by the direct hydroxylation of benzene and phenol,using H₂O₂ as oxidant under mild conditions.The results indicated that the h-TS-1 not only possessed the same MFI topology and ideal crystal form as TS-1,but also had microporous and mesoporous structure,of which the average pore size was 2.67 nm.Compared with TS-1,the catalytic activity of h-TS-1 had been improved significantly.Furthermore,the h-TS-1 had a great capacity of reutilization.

Key words: hierarchical titanium silicalite-1, hydroxylation, sol-gel method, phenol, benzenediol

CLC Number:

O643.3

Yu Tianhua,Ao Houyu,Huang Qipeng,Wu Jinglan. Preparation and catalytic hydroxylation performance of hierarchical titanium silicalite-1[J]. Inorganic Chemicals Industry, 2019, 51(9): 102-105.

Figures/Tables 6

References 17

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样品	比表面积/ （m²·g^-1）	微孔孔容/ （cm³·g^-1）	介孔孔容/ （cm³·g^-1）	平均孔径/ nm
h-TS-1	434	0.173	0.212	2.67
TS-1	398	0.195	—	0.53

样品		苯羟基化^a		苯酚羟基化^b
样品		苯酚产率/%	苯酚选择性/%	苯二酚产率/%	苯二酚选择性/%
h-TS-1	使用1次	35.2	94.8	45.5	79.2
h-TS-1	使用5次	34.1	94.3	44.0	78.8
TS-1	使用1次	28.3	95.1	30.1	80.6
TS-1	使用5次	27.4	94.7	28.9	80.2

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Preparation and catalytic hydroxylation performance of hierarchical titanium silicalite-1

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