Co3O4-KIT-6 composite catalysts: synthesis, characterization and application in catalytic decomposition of N2O

Peter Bruce, FRS, Yu Ren, Z Ma

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

Two sets of Co3O4-KIT-6 composite catalysts were prepared. To prepare the first set of catalysts, mesoporous silica (KIT-6) samples with different pore sizes were obtained by changing the hydrothermal temperature during synthesis, and the same amount of Co3O4 (10 %) was loaded by impregnation. In the second set, KIT-6 prepared by hydrothermal synthesis at 100 °C was used to load different amounts of Co3O4 (up to 50 %). These materials were characterized by low-angle and wide-angle X-ray diffraction, transmission electron microscopy (TEM), and N2 adsorption–desorption. The TEM results showed that Co3O4 species do not disperse on the inner pores of KIT-6 homogeneously, nor do they form separate Co3O4 particles detached from KIT-6. Rather, Co3O4 crystals grow into the KIT-6 matrix, forming Co3O4-KIT-6 composite grains in some parts of the KIT-6 matrix, whereas there are empty mesoporous silica channels in other parts. The influences of textural properties of KIT-6 support and the loading of Co3O4 on the catalytic activity in N2O decomposition were studied. It was found that the textural properties (e.g., pore size, surface area) of KIT-6 have little effect on the catalytic activity, whereas the amount of Co3O4 directly correlates with the catalytic activity.
Original languageEnglish
JournalJournal of Nanoparticle Research
Volume14
Issue number8
Early online date10 Jul 2012
DOIs
Publication statusPublished - 2012

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