| dc.description.abstract | Vanadium is a transition element (atomic weight 50.94)
with valences -1, 2, 3, 4, and 5. Vanadium acts a big part
in human. Minimal amounts of vanadium cause several
kinds of effects in body such as binding transferrin, ferritin
and iron binding proteins [1]. On the other hand, the
electronic conductivity of derivatives of MgxVyOz type
compounds is magnitude higher than that of the vanadium
oxide without magnesium. Also, magnesium containing
compounds exhibit significantly improved kinetic
behaviour and rate capability [2-3].
Magnesium-vanadium oxides are the top catalyst for the
oxidative dehydrogenation of alkanes [4]. V2O5, a member
of acidic oxide family, can react rapidly with the basic
MgO resulting magnesium vanadates. Various magnesium
vanadates such as magnesium orthovanadate, magnesium
pyrovanadate and magnesium metavanadate can be formed
in different compositions of vanadium pentaoxide and
magnesium oxide [5]. In the past years, magnesium
vanadates were synthesized by high temperature
calcination method [5], impregnation pathway [6-8], citrate
methods [9], absorption of vanadyl compounds [10-11],
coprecipitation [6,9,12-15]. Catalytic activity of vanadium
containing magnesium oxides is higher than magnesium
oxide without vanadium [4]. Solid state methods produce
low surface area. So, high temperature calcination methods
were avoided to get high surface area [4].
In this perspective, we aim to synthesis of magnesium
vanadium oxide, having staggering unusual properties,
under mild hydrothermal conditions. | en_US |
