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Nitrogen and Oxygen Sorption Behaviors of Ruthenium-Substituted SBA 15(Ru-SBA-15)  

Seo, Yoon-Ah (Department of Polymer Science and Engineering, Pusan National University)
Kim, Hyung Kook (Department of Nanomaterials Engineering, Pusan National University)
Shin, Jeong Hun (Department of Polymer Science and Engineering, Pusan National University)
Kim, Il (Department of Polymer Science and Engineering, Pusan National University)
Ha, Chang-Sik (Department of Polymer Science and Engineering, Pusan National University)
Publication Information
Korean Chemical Engineering Research / v.47, no.5, 2009 , pp. 608-614 More about this Journal
Abstract
In this work, ruthenium substituted SBA-15's(Ru-SBA15's) of various Si/Ru ratios were prepared using a non-ionic triblock copolymer surfactant, $EO_{20}PO_{70}EO_{20}$, as template. We investigated the nitrogen or oxygen adsorption/desorption behaviors of the Ru-SBA-15's for their future applications as catalysts or selective adsorbents, etc. The pore size of the Ru-SBA-15's was determined by both the Barrett-Joyner-Halenda(BJH)($D_{BJH}$) and the Broekhoff-de Boer analysis with a Frenkel-Halsey-Hill isotherm(BdB-FFF) method($D_{BdB-FHH}$). The $D_{BJH}$ and $D_{BdB-FHH}$ of the Ru-SBA-15 having 50/1 ratio of Si/Ru were 3.9 nm and 4.7 nm, respectively. The transmission electron microscope(TEM) image of the Ru-SBA 15 of the Si/Ru mole ratio of 50 showed that the pore size is 4.7 nm, which is consistent with the $N_2$ adsorption results with the BdB-FHH method. The surface area of pores form oxygen adsorption/desorption isotherm was higher than that from the nitrogen adsorption/desorption isotherm by the Brunauer-Emmett-Teller(BET) method, which were respectively $612.7m^2/g$, and $573.3m^2/g$. X-ray diffraction(XRD) patterns and TEM analyses showed that the mesoporous materials possess well-ordered hexagonal arrays.
Keywords
Mesoporous Materials; SBA-15; Ruthenium; Nitrogen; Oxygen; Adsorption-Desorption Behavior;
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