Structural, Morphological, and Catalytic
Properties of Cryptomelane
Tatyana Rakitskaya, Alla Truba, Vitaliya Volkova, and Pavel Yaremov
1 Introduction
Ozone belongs to extraordinarily toxic gaseous compounds; however, its maximum
permissible concentration in the air of working area, MPC O 3 , according to existing
standards, is different. For instance, MPC O 3 is 0.1 ppm (0.21 mg/m
3 ) in USA
(OSHA), 0.08 ppm (0.171 mg/m
3 ) in China, and 0.047 ppm (0.1 mg/m
3 ) in Ukraine.
Ozone is emitted by welding fabrication and office equipment. It is used in organic
synthesis and some industries for wastewater treatment [1, 2]. Ozone decomposition can be achieved by chemical reactions between ozone and certain compounds,
thermal and catalytic methods [2]. Judging by the recent publications, the most
used methods are the latter. Multicomponent compositions [2–4] containing palladium, silver, and metal oxides [3–6] are the most active catalysts. Catalysts based on
manganese dioxide are of particular interest due to their highest activity in the reaction of ozone decomposition [6]. In recent years, one can see a noticeable progress
in understanding the most important properties determining the catalytic activity
of manganese oxide forms and methods for its control. The structure [7–13] and
morphology [7, 14–17] of manganese oxides are of primary importance. The most
probable mechanism of ozone decomposition by manganese oxide forms involves a
participation of oxygen vacancies [6, 12, 15, 18–22] and Lewis acid sites [23, 24] in
this process. Catalytic activity of the manganese oxides due to their oxygen vacancies can be increased by K
+ [20] and transition metal doping [25, 26], by evacuation
at different evacuation time and temperatures [19], by surface protonation [12], and
T. Rakitskaya · A. Truba (B) · V. Volkova
Odessa II Mechnikov National University, Odessa, Ukraine
e-mail: truba@onu.edu.ua
P. Yaremov
Institute of Physical Chemistry NAS of Ukraine,
[Pleaseinsert\PrerenderUnicode{К}intopreamble]yiv, Ukraine
© Springer Nature Switzerland AG 2021
O. Fesenko and L. Yatsenko (eds.), Nanomaterials and Nanocomposites,
Nanostructure Surfaces, and Their Applications, Springer Proceedings
in Physics 246, https://doi.org/10.1007/978-3-030-51905-6_6
59
Properties of Cryptomelane
Tatyana Rakitskaya, Alla Truba, Vitaliya Volkova, and Pavel Yaremov
1 Introduction
Ozone belongs to extraordinarily toxic gaseous compounds; however, its maximum
permissible concentration in the air of working area, MPC O 3 , according to existing
standards, is different. For instance, MPC O 3 is 0.1 ppm (0.21 mg/m
3 ) in USA
(OSHA), 0.08 ppm (0.171 mg/m
3 ) in China, and 0.047 ppm (0.1 mg/m
3 ) in Ukraine.
Ozone is emitted by welding fabrication and office equipment. It is used in organic
synthesis and some industries for wastewater treatment [1, 2]. Ozone decomposition can be achieved by chemical reactions between ozone and certain compounds,
thermal and catalytic methods [2]. Judging by the recent publications, the most
used methods are the latter. Multicomponent compositions [2–4] containing palladium, silver, and metal oxides [3–6] are the most active catalysts. Catalysts based on
manganese dioxide are of particular interest due to their highest activity in the reaction of ozone decomposition [6]. In recent years, one can see a noticeable progress
in understanding the most important properties determining the catalytic activity
of manganese oxide forms and methods for its control. The structure [7–13] and
morphology [7, 14–17] of manganese oxides are of primary importance. The most
probable mechanism of ozone decomposition by manganese oxide forms involves a
participation of oxygen vacancies [6, 12, 15, 18–22] and Lewis acid sites [23, 24] in
this process. Catalytic activity of the manganese oxides due to their oxygen vacancies can be increased by K
+ [20] and transition metal doping [25, 26], by evacuation
at different evacuation time and temperatures [19], by surface protonation [12], and
T. Rakitskaya · A. Truba (B) · V. Volkova
Odessa II Mechnikov National University, Odessa, Ukraine
e-mail: truba@onu.edu.ua
P. Yaremov
Institute of Physical Chemistry NAS of Ukraine,
[Pleaseinsert\PrerenderUnicode{К}intopreamble]yiv, Ukraine
© Springer Nature Switzerland AG 2021
O. Fesenko and L. Yatsenko (eds.), Nanomaterials and Nanocomposites,
Nanostructure Surfaces, and Their Applications, Springer Proceedings
in Physics 246, https://doi.org/10.1007/978-3-030-51905-6_6
59