Characterization and catalytic properties of mesoporous CuO/SBA-16 prepared by different impregnation methods |
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Authors: | Yongli Dong Fulong Yuan Yujun Zhu Lina Zhao and Zhicheng Cai |
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Affiliation: | (1) Key Laboratory of Functional Materials, Education Office of Heilongjiang Province, School of Chemistry and Materials Science, Heilongjiang University, Harbin, 150080, China |
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Abstract: | CuO/SBA-16 catalysts were prepared by two different routes - the conventional impregnation method and the modified impregnation
method with pH adjustment. These catalysts were characterized by X-ray diffraction (XRD), atomic absorption spectrometry (AAS),
N2 physisorption and hydrogen temperature programmed reduction (H2-TPR) measurements which reveal that the cubic cagelike (Im3m) pore structure of the parent SBA-16 molecule sieves was well maintained throughout the synthesis. After introduction of
Cu, a different CuO dispersion exists on these catalysts. The CuO/SBA-16 prepared by modified impregnation method has a single
highly dispersed CuO which is considered as a highly efficient species for hydroxylation of phenol with H2O2. CuO/SBA-16 prepared by the conventional impregnation method shows the presence of bulk CuO species which is undesirable
for this reaction. |
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Keywords: | CuO/SBA-16 highly dispersed phenol hydroxylation |
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