Konduktiviti dan kestabilan terma asid pepejal komposit CsH2PO4/NaH2PO4/SiO2

Translated title of the contribution: Conductivity and thermal stability of solid acid composites CsH2PO4/NaH2PO4/SiO2

Norsyahida Mohammad, Abu Bakar Mohamad, Abdul Amir H. Kadhum, Kee Shyuan Loh

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Solid acid composites CsH2PO4/NaH2PO4/SiO2 with different mole ratios of CsH2PO4 and NaH2PO4 to SiO2 were synthesized and characterized. Preliminary infrared measurements of CsH2PO4 and its composites indicated that hydrogen bonds breaking and formation were detected between 1710 to 2710 cm-1, while the rotation of phosphate tetrahedral anions occurred between 900 and 1200 cm-1. The superprotonic transition of CsH2PO4/NaH2PO4/SiO2 composite was identified at superprotonic temperatures between 230 and 260 °C, under atmospheric pressure. This study reveals higher conductivity values for composites with higher CsH2PO4 (CDP) content. Solid acid composite CDP 613 appeared as the composite with the highest conductivity that is 7.2 x 10-3 S cm-1 at 230 °C. Thermal stability of the solid acid composites such as temperature of dehydration, melting and decomposition were investigated. The addition of NaH2PO4 lowers the dehydration temperature of the solid acid composites.

Original languageMalay
Pages (from-to)633-641
Number of pages9
JournalMalaysian Journal of Analytical Sciences
Volume20
Issue number3
DOIs
Publication statusPublished - 2016

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Thermodynamic stability
Acids
Composite materials
Cytidine Diphosphate
Dehydration
Temperature
Atmospheric pressure
Anions
Hydrogen bonds
Melting
Phosphates
Infrared radiation
Decomposition

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Konduktiviti dan kestabilan terma asid pepejal komposit CsH2PO4/NaH2PO4/SiO2 . / Mohammad, Norsyahida; Mohamad, Abu Bakar; Kadhum, Abdul Amir H.; Loh, Kee Shyuan.

In: Malaysian Journal of Analytical Sciences, Vol. 20, No. 3, 2016, p. 633-641.

Research output: Contribution to journalArticle

Mohammad, Norsyahida ; Mohamad, Abu Bakar ; Kadhum, Abdul Amir H. ; Loh, Kee Shyuan. / Konduktiviti dan kestabilan terma asid pepejal komposit CsH2PO4/NaH2PO4/SiO2 In: Malaysian Journal of Analytical Sciences. 2016 ; Vol. 20, No. 3. pp. 633-641.
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