In situ synthesis of polytungstate anion-pillared Ni-Al hydrotalcite

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Journal of Beijing University of Chemical Technology ›› 2008, Vol. 35 ›› Issue (2) : 24-28.

化学与化学工程

WANG LiQing^1,2;LIU HongTao¹;LI XiuYan²;FU JiQuan²;XU ChunYan¹

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A terephthalate anion-pillared Ni-Al hydrotalcite-like layered double hydroxide (LDH) was synthesized on the surface and within the pores of γ-Al₂O₃ by in situ crystallization and a polytungstate anion-pillared hydrotalcite was subsequently obtained by ion-exchange. The materials were characterized by XRD, BET, FT-IR and TG-DTA. XRD indicated that the replacement of the terephthalate anion by the polytungstate anion had little effect on the structure. FT-IR spectra suggested that a strong interaction was present between γ-Al₂O₃ and the hydrotalcite. N₂ adsorption measurements showed that the surface area of the LDHs/γ-Al₂O₃composite was 247m²/g, higher than that of γ-Al₂O₃(219m²/g), whilst the pore diameter (3-4nm) was lower than that of γ-Al₂O₃ (2-11nm). Therefore, it can be concluded that nanosized crystals of LDHs are located on both the surface and within the pores of γ-Al₂O₃. The properties of the material make it a good candidate for a hydrodesulfurization catalyst. 

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WANG LiQing^1,2;LIU HongTao¹;LI XiuYan²;FU JiQuan²;XU ChunYan¹
. In situ synthesis of polytungstate anion-pillared Ni-Al hydrotalcite[J]. Journal of Beijing University of Chemical Technology, 2008, 35(2): 24-28

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2007-09-03	1900-01-01	2008-03-20
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2008-03-20

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