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Effect of the thermal and hydrothermal treatment on textural properties of Zr-MCM-41 mesoporous molecular sieve

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Abstract.
Zr-containing mesoporous molecular sieves were synthesized by hydrothermal method using
cetyltrimethyl ammonium bromide as a template and sodium silicate and zirconium sulfate as raw
materials. The structure and morphology of the synthesized samples were characterized via various
physicochemical methods, including X-ray diffraction (XRD), transmission electron microscopy (TEM),
Fourier transform infrared (FT-IR) spectroscopy, solid state nuclear magnetic resonance (29Si MAS-NMR)
techniques, thermal gravimetric–differential scanning calorimeter (TG–DSC) and N2 physical adsorption,
respectively. The effect of the different initial ZrO2:SiO2molar ratio, the different thermal treatment
temperature and the different hydrothermal treatment time on textural property was investigated. The
experimental results reveal that the as synthesized samples possess a typical mesoporous structure of
MCM-41. On the other hand, the specific surface area and pore volume of the synthesized Zr-MCM-41
mesoporous molecular sieve decrease with the increase of the amount of zirconium incorporated in the
starting material, the rise of thermal treatment temperature and the prolonging of hydrothermal
treatment time, the mesoporous ordering becomes poor. Also, when the molar ratio of ZrO2:SiO2 in the
starting material is 0.1, the mesoporous structure of the Zr-MCM-41 mesoporous molecular sieve still
retains after calcination at 750 oC for 3 h or hydrothermal treatment at 100 oC for 6 d, and have specific
surface areas of 423.9 and 563.9 m2/g, respectively.

Keywords: Zr-MCM-41 mesoporous molecular sieve, Synthesis, Characterization, Textural property, Thermal, treatment, Hydrothermal treatment.

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Informasi Detail

Judul Seri

Applied Surface Science

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Surface Science 255 (2009) 6397–6403

Bahasa

English

ISBN/ISSN

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Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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