铌掺杂介孔氧化锆复合催化材料的合成与表征

Abstract

Abstract: Mesoporous ZrO2 was synthesized in absolute ethyl alcohol solvent via a combined sol-gel process with cetyltrimethylammonium bromide（CTAB） as template，zirconyl chloride octahydrate（ZrOCl2·8H2O） as precursor，acetylacetone（ACAC） as hydrolysis inhibitor and with ammonia diluted by absolute ethyl alcohol to adjust the pH.Then，niobium was added to the mesoporous system to synthesize mesoporous Nb2O5-ZrO2，with niobium oxalate as precursor.The as-prepared composite oxide catalyst was characterized by XRD，nitrogen adsorption-desorption isotherms，and Hammett indicator method.Results showed that when n（(Nb）∶n（Zr）＝0.05，the composite was of the typical mesoporous material，with BET specific surface area of 122.42 m2/g， and average pore diameter of 3.68 nm.Although the acid feature of mesoporous ZrO2 will be improved while doping Nb into mesoporous ZrO，it can′t introduce new acid centers.

Key words: mesoporous zirconia')">

mesoporous zirconia, niobium doping, synthesis, acidity

CLC Number:

TQ134.12

MA Yun, MAO Xiao-Ming, WU Xin, FAN Zhen. Synthesis and characterization of niobium doped mesoporous zirconia composite catalysts[J]. INORGANICCHEMICALSINDUSTRY, 2015, 47(2): 75-.

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Synthesis and characterization of niobium doped mesoporous zirconia composite catalysts

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