74
T. Rakitskaya et al.
The most fluffy nanofibrous microspheres are typical for OMS-2(MS). The synthesized OMS-2 samples are heterogeneous micro-mesoporous materials for which the
specific surface area is in the range of 48-112 m
2 /g. pH values in suspensions of the
OMS-2 samples change in the wide range from 3.0 to 11.6 indicating the presence of
acidic and basic sites of different strengths on the OMS-2 surfaces. The method of
OMS-2 obtaining also affects the hydrophilic–hydrophobic properties of the sample
surfaces. At RH of 65%, the OMS-2(SG) sample adsorbs the least amount of water
(a = 0.84 mmol/g).
The OMS-2 samples obtained by different methods demonstrate some differences
in kinetics of ozone decomposition at the initial O 3 concentration of 100 mg/m
3 ,
and their activity decreases in the order OMS-2(MS) > OMS-2(SG) > OMS2(Ref) > OMS-2(SSt). Based on both our own results and the analysis of literature
data concerning the kinetics of ozone decomposition by cryptomelane, it has been
concluded that the OMS-2 catalytic activity is determined by a certain combination
of their structural, morphological, textural, and physicochemical properties.
References
1. Rakitskaya TL, Bandurko AYu, Ennan AA et al (2000) Low-temperature catalytic decomposition of ozone microconcentrations by carbon fibrous materials. Adv Environ Res
3:472–487
2. Rakitskaya TL, Truba AS, Ennan AA et al (2019) Aerosols containing nanostructured
polyphase magnetite: physicochemical and catalytic properties. In: Nanostructured materials:
synthesis, properties and applications. Nova Science Publishers Inc., New York, pp 327−375.
(ISBN: 978-1-53615-013-1)
3. Rakitskaya TL, Bandurko AYu, Raskola LA (2002) Katalizatory nizkotemperaturnogo
razlozheniya ozona: sostoyaniye i perspektivy razrabotki. Visnik ONU. Khimiya. 6:13–
22. (Rakitskaya TL, Bandurko AYu, Raskola LA (2002) Catalysts for low-temperature
decomposition of ozone: state and development prospects. Herald ONU. Chemistry. 6:13–22)
4. Ren C, Zhou L, Shang H, Chen Y (2014) Effect of preparation method on the performance
of Pd-MnO x /γ-Al 2 O 3 monolithic catalysts for ground-level O 3 decomposition. Chin J Catal
35:1883−1890. http://www.sciencedirect.com/science/journal/18722067
5. Schwab GM, Hartmann G (1956) Der katalytische Ozonzerfall. Z Phys Chem 6:72−82. https://
doi.org/10.1524/zpch.1956.6.1_2.072
6. Oyama ST (2000) Chemical and catalytic properties of ozone. Catal Rev 42:279–322. https://
doi.org/10.1081/CR-100100263
7. Almquist C, Krekeler M, Jiang L (2014) An investigation on the structure and catalytic activity
of cryptomelane-type manganese oxide materials prepared by different synthesis routes. Chem
Eng J 252:249–262. https://doi.org/10.1016/j.cej.2014.04.102
8. Jia J, Zhang P, Chen L (2016) Catalytic decomposition of gaseous ozone over manganese
dioxides with different crystal structures. Appl Catal B Environ 189:210–218. https://doi.org/
10.1016/j.apcatb.2016.02.055
9. Liu Y, Zhang P (2017) Catalytic decomposition of gaseous ozone over todorokite-type
manganese dioxides at room temperature: effects of cerium modification. Appl Catal A Gen
530:102–110. https://doi.org/10.1016/j.apcata.2016.11.028
10. Tatibouet JM, Valange S, Touati H (2019) Near-ambient temperature ozone decomposition
kinetics on manganese oxide-based catalysts. Appl Catal A Gen 569:126–133. https://doi.org/
10.1016/j.apcata.2018.10.026
T. Rakitskaya et al.
The most fluffy nanofibrous microspheres are typical for OMS-2(MS). The synthesized OMS-2 samples are heterogeneous micro-mesoporous materials for which the
specific surface area is in the range of 48-112 m
2 /g. pH values in suspensions of the
OMS-2 samples change in the wide range from 3.0 to 11.6 indicating the presence of
acidic and basic sites of different strengths on the OMS-2 surfaces. The method of
OMS-2 obtaining also affects the hydrophilic–hydrophobic properties of the sample
surfaces. At RH of 65%, the OMS-2(SG) sample adsorbs the least amount of water
(a = 0.84 mmol/g).
The OMS-2 samples obtained by different methods demonstrate some differences
in kinetics of ozone decomposition at the initial O 3 concentration of 100 mg/m
3 ,
and their activity decreases in the order OMS-2(MS) > OMS-2(SG) > OMS2(Ref) > OMS-2(SSt). Based on both our own results and the analysis of literature
data concerning the kinetics of ozone decomposition by cryptomelane, it has been
concluded that the OMS-2 catalytic activity is determined by a certain combination
of their structural, morphological, textural, and physicochemical properties.
References
1. Rakitskaya TL, Bandurko AYu, Ennan AA et al (2000) Low-temperature catalytic decomposition of ozone microconcentrations by carbon fibrous materials. Adv Environ Res
3:472–487
2. Rakitskaya TL, Truba AS, Ennan AA et al (2019) Aerosols containing nanostructured
polyphase magnetite: physicochemical and catalytic properties. In: Nanostructured materials:
synthesis, properties and applications. Nova Science Publishers Inc., New York, pp 327−375.
(ISBN: 978-1-53615-013-1)
3. Rakitskaya TL, Bandurko AYu, Raskola LA (2002) Katalizatory nizkotemperaturnogo
razlozheniya ozona: sostoyaniye i perspektivy razrabotki. Visnik ONU. Khimiya. 6:13–
22. (Rakitskaya TL, Bandurko AYu, Raskola LA (2002) Catalysts for low-temperature
decomposition of ozone: state and development prospects. Herald ONU. Chemistry. 6:13–22)
4. Ren C, Zhou L, Shang H, Chen Y (2014) Effect of preparation method on the performance
of Pd-MnO x /γ-Al 2 O 3 monolithic catalysts for ground-level O 3 decomposition. Chin J Catal
35:1883−1890. http://www.sciencedirect.com/science/journal/18722067
5. Schwab GM, Hartmann G (1956) Der katalytische Ozonzerfall. Z Phys Chem 6:72−82. https://
doi.org/10.1524/zpch.1956.6.1_2.072
6. Oyama ST (2000) Chemical and catalytic properties of ozone. Catal Rev 42:279–322. https://
doi.org/10.1081/CR-100100263
7. Almquist C, Krekeler M, Jiang L (2014) An investigation on the structure and catalytic activity
of cryptomelane-type manganese oxide materials prepared by different synthesis routes. Chem
Eng J 252:249–262. https://doi.org/10.1016/j.cej.2014.04.102
8. Jia J, Zhang P, Chen L (2016) Catalytic decomposition of gaseous ozone over manganese
dioxides with different crystal structures. Appl Catal B Environ 189:210–218. https://doi.org/
10.1016/j.apcatb.2016.02.055
9. Liu Y, Zhang P (2017) Catalytic decomposition of gaseous ozone over todorokite-type
manganese dioxides at room temperature: effects of cerium modification. Appl Catal A Gen
530:102–110. https://doi.org/10.1016/j.apcata.2016.11.028
10. Tatibouet JM, Valange S, Touati H (2019) Near-ambient temperature ozone decomposition
kinetics on manganese oxide-based catalysts. Appl Catal A Gen 569:126–133. https://doi.org/
10.1016/j.apcata.2018.10.026