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I. Ivanenko et al.
and industrial gas waste; hydrogen production from different raw, CO production in
methanol industry, in solar energy.
Photocatalytic water purification from organic pollutants, such as chlorine
compounds, phenols, different dyes, acetic acid, 4-nitrophenol, isopropanol, etc.,
has the main advantage that during the oxidation process on the photocatalyst,
organic impurities are subjected to complete destruction, forming mineral acids.
Compounds are formed, which are safe for the environment. It should be noted,
the majority of researches, despite them applied nature, had been conducted only
in laboratory. Although, there are some data about industrial tests of purification
devices and water disinfection with using of photocatalysts [8].
In scientific works, there is much description of photocatalytic air purification
from different organic pollutants: toluene, trichloroethylene, acetone, formaldehyde,
etc. [9, 10]. This method allows purifying air from pollutants, noted above, in
industrial and residential areas. In present day there are known developments the
prototypes of photocatalytic air purifiers, the part from them has already launched
into production and realized successfully at modern market.
A single important question concerns photocatalytic air purification from wastes
of diesel motors. Toward this objective, complex laboratory researches are being
conducted to study the possibility of neutralization of CO, hydrocarbons, and nitrogen oxides in exhausts by different photocatalysts [11, 12]. At present, conventional
catalytic converters are used [12]. However, they have significant disadvantages:
low purification level, high investment, etc.
One of the major areas of industrial application of photocatalysts is in the
producing of hydrogen from water by decomposition under radiation in the visible
spectrum. A number of studies dedicated to the search for new, renewable energy,
which is an alternative to coal, gasoline, natural gas, and other kinds of fuel,
propose to use hydrogen, extracted by the method noted above [13, 14]. So far,
this process has been successfully achieved in laboratories, with the potential of
hydrogen production on a large scale [4].
There is in future the possibility of application of chalcogenides of molybdenum
(IV) as photocatalyst. For example, in combination with CdS 2 , MbS 2 increases
the speed of hydrogen formation [13]. Few-layer or monolayer molybdenum
(IV) chalcogenides have attracted the attention of researchers and are considered
as potential alternatives to platinum catalysts in reaction of hydrogen evolution
[15–17].
Chalcogenides of transition metals have a number of attractive properties. Their
stable single layers can be used to create new nanoelectronic devices, which, as
expected, have high thermal stability and provide lower energy consumption compared to similar existing devices. Di-chalcogenides of transition metals can be used
together with graphene in optoelectronic devices, having exotic physical properties
of monolayer materials, absent in their volume prototypes. The monolayer MoS 2
has already been used to produce low-power field transistors, logic schemes, and
phototransistors. Semiconductor two-dimensional (2D) chalcogenides of transition
metals such as MoS 2 , MoSe 2 , WS 2 , and WSe 2 are considered as prospective materials for a number of applications. For example, MoS 2 can find possible application
I. Ivanenko et al.
and industrial gas waste; hydrogen production from different raw, CO production in
methanol industry, in solar energy.
Photocatalytic water purification from organic pollutants, such as chlorine
compounds, phenols, different dyes, acetic acid, 4-nitrophenol, isopropanol, etc.,
has the main advantage that during the oxidation process on the photocatalyst,
organic impurities are subjected to complete destruction, forming mineral acids.
Compounds are formed, which are safe for the environment. It should be noted,
the majority of researches, despite them applied nature, had been conducted only
in laboratory. Although, there are some data about industrial tests of purification
devices and water disinfection with using of photocatalysts [8].
In scientific works, there is much description of photocatalytic air purification
from different organic pollutants: toluene, trichloroethylene, acetone, formaldehyde,
etc. [9, 10]. This method allows purifying air from pollutants, noted above, in
industrial and residential areas. In present day there are known developments the
prototypes of photocatalytic air purifiers, the part from them has already launched
into production and realized successfully at modern market.
A single important question concerns photocatalytic air purification from wastes
of diesel motors. Toward this objective, complex laboratory researches are being
conducted to study the possibility of neutralization of CO, hydrocarbons, and nitrogen oxides in exhausts by different photocatalysts [11, 12]. At present, conventional
catalytic converters are used [12]. However, they have significant disadvantages:
low purification level, high investment, etc.
One of the major areas of industrial application of photocatalysts is in the
producing of hydrogen from water by decomposition under radiation in the visible
spectrum. A number of studies dedicated to the search for new, renewable energy,
which is an alternative to coal, gasoline, natural gas, and other kinds of fuel,
propose to use hydrogen, extracted by the method noted above [13, 14]. So far,
this process has been successfully achieved in laboratories, with the potential of
hydrogen production on a large scale [4].
There is in future the possibility of application of chalcogenides of molybdenum
(IV) as photocatalyst. For example, in combination with CdS 2 , MbS 2 increases
the speed of hydrogen formation [13]. Few-layer or monolayer molybdenum
(IV) chalcogenides have attracted the attention of researchers and are considered
as potential alternatives to platinum catalysts in reaction of hydrogen evolution
[15–17].
Chalcogenides of transition metals have a number of attractive properties. Their
stable single layers can be used to create new nanoelectronic devices, which, as
expected, have high thermal stability and provide lower energy consumption compared to similar existing devices. Di-chalcogenides of transition metals can be used
together with graphene in optoelectronic devices, having exotic physical properties
of monolayer materials, absent in their volume prototypes. The monolayer MoS 2
has already been used to produce low-power field transistors, logic schemes, and
phototransistors. Semiconductor two-dimensional (2D) chalcogenides of transition
metals such as MoS 2 , MoSe 2 , WS 2 , and WSe 2 are considered as prospective materials for a number of applications. For example, MoS 2 can find possible application