Synthesis, characterization, and catalytic properties of Ti-containing SBA-15 mesoporous materials

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

doi:10.1117/12.695746

20 December 2006 Synthesis, characterization, and catalytic properties of Ti-containing SBA-15 mesoporous materials

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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Proceedings Volume 6415, Micro- and Nanotechnology: Materials, Processes, Packaging, and Systems III; 64151A (2006) https://doi.org/10.1117/12.695746
Event: SPIE Smart Materials, Nano- and Micro-Smart Systems, 2006, Adelaide, Australia

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.

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Phuong T. Dang, Hy G. Le, Duc V. Hoang, Yen Hoang, Thang C. Dinh, Linh H. Bui, Hoa T. K. Tran, Phu H. Nguyen, and Tuan A. Vu "Synthesis, characterization, and catalytic properties of Ti-containing SBA-15 mesoporous materials", Proc. SPIE 6415, Micro- and Nanotechnology: Materials, Processes, Packaging, and Systems III, 64151A (20 December 2006); https://doi.org/10.1117/12.695746

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