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Proceedings Paper

Synthesis, characterization, and catalytic properties of Ti-containing SBA-15 mesoporous materials
Author(s): Phuong T. Dang; Hy G. Le; Duc V. Hoang; Yen Hoang; Thang C. Dinh; Linh H. Bui; Hoa T. K. Tran; Phu H. Nguyen; Tuan A. Vu
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Paper Abstract

Titanium-containing SBA-15 mesoporous materials with Si/Ti molar ratios of 25, 50 and 100 (Ti-SBA-15) were successfully prepared by direct synthesized method using P123 as surfactant. The samples were characterized by XRD, BET, TEM and UV-Vis. It revealed at low Ti-loading (Si/Ti of 50-100), titanium was completely incorporated into SBA-15 framework, whereas at high Ti-loading (Si/Ti of 25) titanium was partially incorporated into SBA-15 framework, one part of Ti existed as extra-framework Ti (anatase phase). For comparison, Ti impregnated on Si-SBA-15 (Ti/SBA-15) was also prepared by postsynthesis method. In (*)this case, titanium was well dispersed onto the surface of SBA-15. The catalytic activities of Ti-SBA-15 with different Ti-content and Ti/SBA-15 samples were tested in the photocatalytic oxidation of red-phenol and in the photocatalytic reduction of Cr(VI) to Cr(III). The catalytic results showed that both the Ti-SBA-15 and Ti/SBA-15 solids are also the good catalysts for total photooxidation of red phenol. Especially, the tetrahedral coordinated titanium can oxidize red phenol much deeper than well dispersed titanium particles does. For photocatalytic reduction, the activities mainly depend on the number of Ti, not the state of Ti.

Paper Details

Date Published: 20 December 2006
PDF: 10 pages
Proc. SPIE 6415, Micro- and Nanotechnology: Materials, Processes, Packaging, and Systems III, 64151A (20 December 2006); doi: 10.1117/12.695746
Show Author Affiliations
Phuong T. Dang, Vietnamese Academy of Science and Technology (Vietnam)
Hy G. Le, Vietnamese Academy of Science and Technology (Vietnam)
Duc V. Hoang, Hue Univ. (Vietnam)
Yen Hoang, Vietnamese Academy of Science and Technology (Vietnam)
Thang C. Dinh, Vietnamese Academy of Science and Technology (Vietnam)
Linh H. Bui, Vietnamese Academy of Science and Technology (Vietnam)
Hoa T. K. Tran, Vietnamese Academy of Science and Technology (Vietnam)
Phu H. Nguyen, Vietnamese Academy of Science and Technology (Vietnam)
Tuan A. Vu, Vietnamese Academy of Science and Technology (Vietnam)


Published in SPIE Proceedings Vol. 6415:
Micro- and Nanotechnology: Materials, Processes, Packaging, and Systems III
Jung-Chih Chiao; Andrew S. Dzurak; Chennupati Jagadish; David Victor Thiel, Editor(s)

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