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Synthesis of nanosized vanadium(v) oxide clusters below 10 nm

“…However, although EELS has been successfully employed in previous experiments on bulk vanadium oxide as well as thin films, [40][41][42] in this particular case the approach turned out to be futile due to the close proximity of the V L-and O K-edges. The low electron beam dosage mentioned above, a necessity to avoid particle damage and to prevent electron-beam induced reduction, 43 provides a rather weak EELS signal and a relatively low resolution compared to other published spectra. An EELS spectrum obtained from a nanoparticle is presented in Fig.…”

Vanadium(V) oxide clusters synthesized by sublimation from bulk under fully inert conditions

“…36) and the practically inert environment provided by the droplets, it is even possible to synthesize very weakly bound or highly reactive species, which can then be studied on-the-fly via optical methods such as laser-induced fluorescence spectroscopy or mass spectrometry. Alternatively, the structures can also be deposited on substrates for follow-up studies via electron microscopy,37–39 electron energy loss spectroscopy,40 energy-dispersive X-ray spectroscopy41 or surface diffraction methods 42…”

Coke Deposition and Structural Changes of Pellet V2O5/NaY-SiO2 in Air Regeneration: The Effects of Temperature on Regeneration

“…The addition of vanadia to NaY-SiO 2 could promote ethanol oxidation, thereby decreasing coke formation. However, the effectiveness of the vanadia addition and how high of a temperature the vanadia adsorbents (V 2 O 5 /NaY-SiO 2 ) can stand are still unclear; at a too high a regeneration temperature, the exothermic heat may destroy the zeolite framework and induce V 2 O 5 aggregation [16,29,30]. Long-term cycle aging test results, combined with a study of the relation between regeneration temperature, adsorbent structure, and regeneration efficacy, helped us to reach our research goal of exploring the optimal regeneration temperature.…”