Calorimetric measurement of interface enthalpy of nanocrystalline silver(I) oxide (Ag2O)

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Khansaa Al-Essa, AV Radha and Alexandra Navrotsky

Peter A. Rock Thermochemistry Laboratory and NEAT ORU, University of California, USA
Jerash University, Jordan

: J Nanomater Mol Nanotechnol

Abstract

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The interface enthalpy of nanocrystalline silver(I) oxide (Ag2O.nH2O) was measured. Ag2O.nH2O nanocrystalline samples of varying surface areas and degrees of agglomeration were synthesized by wet chemical technique. Interface areas were estimated by comparing the surface areas measured by N2 adsorption to the crystallite sizes refined from X-ray diffraction data. The interface enthalpy was verified by utilizing thermodynamic cycle, using enthalpy of solution measurements in 25% HNO3 at room temperature solution calorimetry. The interface enthalpy of the nanocrystalline Ag2O.nH2O is (0.842 ± 0.508 J/m2). This work provides the first calorimetric measurement of the interface enthalpy of nanocrystalline silver(I) oxide (Ag2O.nH2O).

Biography

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E-mail: khansaa.essa@gmail.com