| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2014: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2013: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2012: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Outline of Final Research Achievements |
Layered-structure-type tungsten based complex oxides (W-M-O, M= Ti, Zr, Nb, Ta) were synthesized by the hydrothermal method. The synthesized W-M-O showed characteristic peaks at 2θ = 22.7° and 46.2° in an X-ray diffraction pattern (Cu-Ka), indicating linear corner-sharing of MO6 octahedra in the c-direction. The same layered-type materials were obtained with a wide range of W and M composition ratios by using soluble precursors. The catalytic activity of W-M-O increased with increase in the W ratio, suggesting that strong acid sites were generated. From Raman and adsorption measurements of W-M-O with various crystalline structures, it was revealed that the crystalline motif of W-M-O in the a-b plane was an interconnection of MO6 octahedra and {M6O21} pentagonal units and micropore channels but without long-range order.
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