Bulletin of National University of Uzbekistan: Mathematics and Natural Sciences


The paper is devoted to determination of active nanoparticles sizes. Other particles bigger or smaller of calculated size limits are not demonstrated the special activity, on the example of catalytic elimination of environmental pollutants, namely, carbon monoxide, under ambient conditions - low temperature, high humidity, the presence of anthropotoxins. Discusses basic understanding of catalysts used in environmental pollution abatement, in particular, high activity of nanocatalysts with certain sizes and lack of activity of catalysts particles with other sizes. Nevertheless it remains unclear why massive objects containing palladium, as well as true solutions are not effective as catalysts for low-temperature carbon monoxide oxidation. At the same time only palladium containing nanosystems having a narrow size range are effective. The submitted work is the first step in quantifying this range. It is hopefully this will assists to determine the causes of unusually high nanocatalysts efficiency.

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1. Brune H., Ernst H., Grünwald W., Grünwald A., Hofmann H., Janich P., Simon U. Nanotechnology. Wiley-VCH, (2008). – 436 pp.

2. Rao J.P., Geckeler K.E. Polymer nanoparticles: preparation techniques and size-control parameters. Progress in polymer science, Vol. 36, Issue 7, 887–913 (2011).

3. Menezes S., Samantilleke A. Formation of unique nanocrystalline Cu-In-Se bulk pn homojunctions for opto-electronic devices. Scientific reports, Vol. 8, Issue 1, 11350 (2018).

4. Devaraj A., Wang W., Vemuri R., Kovarik L., Jiang X., Bowden M., Rohatgi A. Grain boundary segregation and intermetallic precipitation in coarsening resistant nanocrystalline aluminum alloys. Acta Materialia, Vol. 165, 698–708 (2019).

5. Chen M., Han Y., Goh T.W., Sun R., Maligal-Ganesh R.V., Pei Y., Huang W. Kinetics, energetics, and size dependence of the transformation from Pt to ordered PtSn intermetallic nanoparticles. Nanoscale, Vol. 11, Issue 12, 5336–5345 (2019).

6. Peng T. Synthesizing Efficient Quasi-one-dimension Titanium Dioxide Nanocatalyst for Enhanced Photocatalytic Degradation of Aqueous Organic Pollutants and Hydrogen Production. Thèse de doctorat de Chimie physique et de chimie analytique, (2018).

7. Gusev A.I., Rempel A.A. Nanocrystalline materials. Cambridge Int. Science Publishing, Vol. 21 (2004).

8. Dong C., Lian C., Hu S., Deng Z., Gong J., Li M., Zhang J. Size-dependent activity and selectivity of carbon dioxide photocatalytic reduction over platinum nanoparticles. Nature communications, Vol. 9, Issue 1, 1252 (2018).

9. Rakhimov T.Kh., Mukhamediev M.G., Khakimjanov B.Sh. The Synthesis Of Applied Nano-Catalysts Of Low-Temperature Carbon Monoxide Oxidation. 8th International Symposium Molecular Order and Mobility in Polymer Systems, St. Petersburg, June 2-6, Book Of Abstracts, 116 (2014).

10. Rakhimov T.Kh., Mukhamediev M.G. Palladium-containing nanosystems in the low-temperature CO oxidation: the determining influence of the bearer's nature on the reaction mechanism. Compositional material, Issue 2, 8–11 (2014).

11. Rakhimov T.Kh. Quantitative Criteria For The Comparative Size Of The Nanoparticles. 8th International Symposium Molecular Order and Mobility in Polymer Systems, St. Petersburg, June 2-6, Book Of Abstracts, 42 (2014).

12. Varentsov V.K., Jerebilov A.F., Maley M.D. Carbon-graphite fibrous materials; new electrodes for the metals' extraction from dilute solutions. News SU AS USSR., Ser. chem. scie., Vol. 6, Issue 17, 120–127 (1984).

13. Technical conditions: Specifications: Automatic Chromatograph XTM 73GL, TC 25-0512.050-82.

14. Rakhimov T.Kh., Mukhamediev M.G. Exhaustive carbon monoxide removal in the presence of nanocatalysts. Ecological Chemistry, Vol. 24, Issue 2, 68–76 (2015).

15. Gorodetskii V.V., Matveev A.V., Kalinkin A.V., Nieuwenhuys B.E. Mechanism for CO Oxidation and Oscillatory Reactions on Pd Tip and Pd(110) Surfaces: FEM, TPR, XPS Studies. Chemistry for Sustainable Development, Vol. 11, Issue 1, 67–74 (2003).

16. Keshav C.S., Krishna R., Chandra S., Singh B. Catalytic oxidation of carbon monoxide over supported palladium nanoparticles. Applied Nanoscience, Vol. 6, Issue 1, 7–17 (2016).

17. Belyakov V.A., Linev A.V., Gorshkov A.V., Krylov I.B. Monte Carlo simulation of an silicon nanocrystals array relaxation using graphic accelerators. Bulletin of the Nizhny Novgorod State University named after N.I.Lobachevsky, No. 4(1), 260–267 (2012).

18. Kalgin K.V. Cellular automaton modeling of physicochemical processes of the nanoscale at graphic accelerators. Bulletin of the Nizhny Novgorod University named after N.I. Lobachevsky, No. 6(1), 162–164 (2013).

19. Fard M.J.S., Hayati P., Firoozadeh A., Janczak J. Ultrasonic synthesis of two new zinc (II) bipyridine coordination nano-particles polymers: new precursors for preparation of zinc (II) oxide nano-particles. Ultrasonics sonochemistry, Vol. 35, 502–513 (2017).

20. Fridman L.I. Carbon-fibre adsorbents. Theoretical principles of production and conduct of sorption processes. Fibre Chemistry, Vol. 42, Issue 5, 300–304 (2011).

21. Rakhimov T.Kh., Rakhmanova G.Sh. Calculation of active fractions sizes in supported nanocrystals. Computational nanotechnology, No. 1, 44–52 (2019).



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