Synthesis of TS-1 Nanocrystals on Silica Gel via Steam-assisted Dry Gel Conversion Method

Chem. J. Chinese Universities

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Synthesis of TS-1 Nanocrystals on Silica Gel via Steam-assisted Dry Gel Conversion Method

KE Xue-Bin¹, XU Li¹, ZENG Chang-Feng², ZHANG Li-Xiong¹*, XU Nan-Ping¹

1. State Key Laboratory of Materials-oriented Chemical Engineering, College of Chemistry and Chemical Engineering;
2. College of Mechanical and Power Engineering, Nanjing University of Technology, Nanjing 210009, China

Received:2007-01-22 Revised:1900-01-01 Online:2007-08-10 Published:2007-08-10
Contact: ZHANG Li-Xiong

Abstract

Abstract: TS-1 nanocrystals were synthesized on silica gel via dry gel conversion method, at first silica gel was impregnated with TS-1 synthesis solution and then followed by steam treatment at 130 ℃ for 2 d. The product was characterized with XRD, FTIR, UV-Vis, NMR, N₂ adsorption, ICP, SEM and TEM. The results indicate that TS-1 crystals were grown on silica gel with a size of ca. 20 nm, a BET specific surface area of 113.2 m²/g and a mesopore size of 23.7 nm. The product exhibited a higher catalyst performance than TS-1 powders, which was prepared by conventionally hydrothermal synthesis, for benzene hydroxylation with n(benzene)/n(H₂O₂)=3 and sulfolane as the solvent at 100 ℃ for 2 h. The benzene conversion and TOF were 8.7% and 11.37, respectively, with more than 99% of phenol selectivity.

Key words: Nanocrystal, TS-1, Dry gel conversion method, Silica gel

CLC Number:

O614

TrendMD:

KE Xue-Bin¹, XU Li¹, ZENG Chang-Feng², ZHANG Li-Xiong¹*, XU Nan-Ping¹. Synthesis of TS-1 Nanocrystals on Silica Gel via Steam-assisted Dry Gel Conversion Method[J]. Chem. J. Chinese Universities, doi: .

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Synthesis of TS-1 Nanocrystals on Silica Gel via Steam-assisted Dry Gel Conversion Method

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