NDLI: Proton conduction in and structure of P$_{2}$O$_{5}$-TiO$_{2}$-CaO-Na$

Content Provider	Springer Nature Link
Author	Shin, Jae Young Kim, Dae Sung Ryu, Bong Ki
Copyright Year	2017
Abstract	Phosphate sol-gel-derived glasses in a P$_{2}$O$_{5}$-CaO-Na$_{2}$O-TiO$_{2}$ system with a high TiO$_{2}$ content of up to 50 mol% were synthesized. A sol-gel method was chosen because incorporating a high percentage of titanium into the phosphate network via traditional melt-quench methods is not trivial. The structural and the thermal properties of the obtained stabilized sol-gel glasses were characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and differential scanning calorimetry. The XRD results confirmed the amorphous and glassy nature of the prepared samples. The FTIR results revealed that, with the addition of TiO$_{2}$, titanium oxide (TiO$_{6}$) (which likely acts as a modifier oxide) entered the network. Consequently, the number of terminal oxygen atoms increased, leading to an increase in the number of P-OH bonds. The proton conductivity of the sol-gel glass samples was as high as 0.0102 S·cm$^{−1}$ at a relative humidity of 100% and a temperature of 100 ◦ C. The FTIR analysis confirmed the presence of (HPO$_{4}$)$^{2−}$ - and (H$_{2}$PO$_{4}$)$^{−}$-coordinated phosphorous. These functional groups acted as a bridge in the Grotthuss proton-conduction mechanism.
Starting Page	1054
Ending Page	1059
Page Count	6
File Format	PDF
ISSN	03744884
Journal	Journal of the Korean Physical Society
Volume Number	70
Issue Number	12
e-ISSN	19768524
Language	English
Publisher	The Korean Physical Society
Publisher Date	2017-06-24
Publisher Place	Seoul
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Proton conduction Sol-gel Theoretical, Mathematical and Computational Physics Phosphate glass Physics Particle and Nuclear Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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