V2O5-P2O5계 유리의 B2O3 치환에 따른 구조 및 물성변화 (2)

In this study, we verify the relationship among the catalytic effect, electrical conductivity, and structure of vanadium borophosphate glasses that have a coincidence of BO3 and BO4 and a coincidence of V4+ and V5+. We prepared vanadium borophosphate glasses with various compositions, given by 70V2O5- xB2O3-(70-x) P2O5(x=0-10mol%), and analyzed the catalytic effect, electrical conductivity, FT-IR spectroscopy, X-ray photoelectron spectroscopy, thermal properties, density, and molar volume. In V2O5-P2O5 binary glasses, the electrical conductivity increased from 0. 4073 × 10?7/Ω to 20.167 × 10?7/Ω but the catalytic effect for oxidation reactions of linoleic and stearic acid decreased with an increasing B2O3. From these results, we can deduce that electrons shift from V4+ to V5+ with an increasing B2O3. FT-IR analysis showed an occurrence peak at 680 cm?1 and XPS analysis showed that a V4+ decrease and a V5+ increase are the basis of the electron shift from V4+ to V5+. We also verify the structure and change in properties from quantitative properties such as thermal properties, density, and molar volume.(Received May 16, 2014)