Russian Journal of Applied Chemistry, 2012, Vol. 85, No. 10, pp. 1501−1508.
Pleiades Publishing, Ltd., 2012.
Original Russian Text © A.V. Mamchenko, I.V. Yakupova, O.A. Savchenko, N.N. Chernova, N.N. Kii, V.N. Novichenko, 2012, published in Zhurnal Prikladnoi
Khimii, 2012, Vol. 85, No. 10, pp. 1562−1569.
AND INDUSTRIAL INORGANIC CHEMISTRY
Varying Surface Morfology of Oxide-Carbonate Ores
in the Synthesis of an Adsorbent Catalyst
A. V. Mamchenko
, I. V. Yakupova
, O. A. Savchenko
, N. N. Chernova
N. N. Kii
, and V. N. Novichenko
Institute of Colloid and Water Chemistry, National Academy of Sciences of Ukraine, Kiev, Ukraine
Kholodny Institute of Botany, National Academy of Sciences of Ukraine, Kiev, Ukraine
Received April 12, 2011
Abstract—Investigation of the surface morphology of oxide-carbonate manganese ore and dolomite and also
adsorbent catalyst samples synthesized on their basis showed that heat treatment of ores resulted in variation of
their qualitative composition, surface state, and hardening their structure.
One of the main features of modern technologies for
the synthesis of materials with desired properties is the
understanding of the important role of the surface and
near-surface region of the solid, in which thin layers
are applied in various ways. The development of such
technologies is made possible due to availability of high-
resolution techniques of researching composition and
structure of the surface of solids .
Adsorbents with catalytic properties are often used in
water treatment. A technique of applying the active com-
ponent in the form of thin ﬁ lms on a substrate of an inert
material is used to obtain these adsorbents. Manganese
) due to its physical and chemical proper-
ties of polymorphic diversity, morphological and tunnel
structures is one of the most important transition metal
oxides, which is widely used as a catalyst.
The technology for production of adsorbent catalysts
by modifying mineral raw material using inorganic oxides
[2, 3] was developed in Institute of Colloid and Water
Chemistry of Ukraine for water puriﬁ cation from iron
and manganese compounds.
Natural dolomite (Dokuchaevsky ﬂ ux dolomite plant,
Donetsk region), enriched oxide-carbonate manganese
ore (EOCMO) (Nikopol deposit, Dnipropetrovsk region.),
and adsorbent catalysts synthesized based on these, which
were produced consistently in two stages: thermal and
chemical modiﬁ cation, were used to carry out the re-
searches. Known commercial adsorbent catalysts Pyrolax,
Greenland, MTM were investigated for comparison,
Measurement of an area and volume of pores of
samples was carried out by low-temperature nitrogen
adsorption in poromere Quantachrome Instruments 2.01.
The method is based on the measurement of the adsorp-
tion–desorption isotherms of nitrogen at liquid nitrogen
temperature. All investigated samples previously were
evacuated for 20 hours at 180°C.
The study of the surface morphology of adsorbent cata-
lysts was carried out using a scanning electron microscope
JSM-6060LA. Such studies are required to understand the
factors that control the processes occurring at the interface
and enabling the development of effective materials with
the desired properties for certain purposes.
The study of adsorption of gases by solids can provide
valuable information about their speciﬁ c surface area
and porous structure. A list of adsorptives used for these
purposes is very small, most often nitrogen is used as
adsorptive. The structural characteristics of materials were
studied by a reference porosimetry (nitrogen sorption at
boiling point 77 K) (see the table, Figs. 1, 2).
As can be seen from Fig. 1, all the samples have
a hysteresis loop of type IV, which is characteristic of
mineral mesoporous adsorbents with slit-shaped pores