Effect of milling of V2O5 on the local environment of vanadium as studied by solid-state 51V NMR and complementary methods
Article Abstract:
The role of ball milling in changing the local environment of the nuclei in pure oxides of V2O5 has been studied through nuclear magnetic resonance and complementary methods. V2O5 is the active component of vanadium-based catalysts. Results indicate that ball milling increases V2O5 surface area from 7 to a maximum of 32 square meters per gram. There is also a reduction in the microcrystallites due to a broadening in the XRD line while change in color from ball milling leads to loss of oxygen. It was further noted that there shear structures such as V6O13 based on the Raman spectra.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Roles of surface heterogeneity and lateral interactions on the isosteric heat of adsorption and adsorbed phase heat capacity
Article Abstract:
A study was conducted to analyze the coupled effects of parameters on the isosteric heat of adsorption, adsorption equilibria, and adsorbed phase heat capacity. The difference between the molar adsorbed and gas-phase heat capacities was determined using a derived expression. Results indicated that differential adsorbed phase heat capacity correlates with fractional surface coverage, temperature and surface heterogeneity.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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