Effect of Thermal Treatment Time on the Dispersion of MoO3 onto the Surface of MCM-41

Abstract

Abstract: The dispersion of MoO₃ onto the surface of MCM-41 was carried out by thermally treating the mixtures of MoO₃ and MCM-41. The effect of thermal treatment
time on the spreading of MoO_₃ onto the surface of MCM-41 support was studied by XRD and LRS. The results showed that bulk MoO₃ transformed into dispersed
surface polymolybdates species gradually as prolonging the treating time. The complete dispersion of MoO₃ was attained after heating for 8h at 500℃
when m(MoO₃)/m(MCM-41) was 0.2. The structure of MCM-41 was still maintained in the process of thermal treatment. BET surface areas, pore volumes and BJH pore
sizes of the samples were not changed markedly as the increment of thermal treatment time, which indicated that MoO₃ dispersed monolayeredly on the surface of MCM-41.

Key words: thermal treatment time, MoO₃, MCM-41, dispersion

CLC Number:

TB383

LI Zheng-Ping,GAO Lian,ZHENG Shan. Effect of Thermal Treatment Time on the Dispersion of MoO₃ onto the Surface of MCM-41[J]. Journal of Inorganic Materials.

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Effect of Thermal Treatment Time on the Dispersion of MoO₃ onto the Surface of MCM-41

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