Please use this identifier to cite or link to this item: https://ir.swu.ac.th/jspui/handle/123456789/14972
ชื่อเรื่อง: Synthesis, preparation and catalytic activities of V-doped TiO2 gel coating on porous α-Al2O3 beads
ผู้แต่ง: Jaroenworaluck A.
Panyathanmaporn T.
Soontornworajit B.
Supothina S.
Tawkaew S.
Jiamsakul S.
Sooknoi T.
Keywords: Alumina
Catalyst activity
Coated materials
Doping (additives)
Porous materials
Temperature control
X ray diffraction analysis
Calcination temperatures
Oxidation reactions
V-doping
Titanium dioxide
วันที่เผยแพร่: 2007
บทคัดย่อ: TiO2 and V-doped TiO2 gel were synthesized and coated onto porous α-Al2O3 beads to study the thermal catalytic activities of oxidation reactions. Titanium isopropoxide (Ti(OPr) 4) and 1,2-butadiol(Bu(OH)2) were used as starting chemicals for preparation of TiO2 gel without V-doping. After aging at ambient temperature for one week, a TiO2 gel was obtained. The concentration of Ti(OPr)4 was varied, 0.2, 0.3, 0.7 and 2.4 M was used. For V-doping of the TiO2 gel, 0.05, 0.20 and 0.75 mole% of V was prepared by ultrasonically dissolving vanadium acetylacetone (V(acac) 2) in 1,2-butadiol. The solutions were then added to Ti(OPr) 4. Finally, the mixed solutions were kept under ambient temperature for one week to form the V-doped TiO2 gel. TiO2 and V-doped TiO2 were calcined at 300, 400, 500, 600, 700, and 800°C. XRD analysis, SEM and TEM in conjunction with EDS analysis were used to identify the phases present, grain size and morphology. The TiO2 grains have a particle size in the nano-scale range. Doping TiO2 with V could retard growth of the TiO2 particles and affect phase transformation at higher calcination temperatures. Both the TiO2 and V-doped TiO2 gels were prepared and coated onto α-Al 2O3 beads to test oxidation reactions in a purpose-designed reactor. The results of the catalytic reactions indicated that V-doped TiO2 had a higher oxidation activity than the undoped TiO2 gel. The content of vanadium was related to the reaction efficiency.
URI: https://ir.swu.ac.th/jspui/handle/123456789/14972
https://www.scopus.com/inward/record.uri?eid=2-s2.0-38349151965&doi=10.4028%2f0-87849-431-6.147&partnerID=40&md5=12307b2d2b371ce9935c933f4ba27ed0
ISSN: 2555476
Appears in Collections:Scopus 1983-2021

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