Photocatalytic Activity of Copper(II) Oxide Nanoparticles Synthesized Using Serratula Coronata L. Extract
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ocatalytic Activity of Copper(II) Oxide Nanoparticles Synthesized Using Serratula Coronata L. Extract A. A. Mashentsevaa, b, *, N. A. Aimanovab, B. S. Temirgazievc, A. T. Zhumazhanovaa, and B. I. Tuleuovc a
Institute of Nuclear Physics of the Republic of Kazakhstan, Almaty, 050032 Republic of Kazakhstan b Gumilyov Eurasian National University, Nur-Sultan, 010000 Republic of Kazakhstan cAO International Research and Production Holding Phytochemistry, Karaganda, 100009 Republic of Kazakhstan *e-mail: [email protected] Received May 18, 2020; revised June 10, 2020; accepted June 11, 2020
Abstract—Copper(II) oxide nanoparticles with an average size of 52 ± 5 nm are synthesized by wet combustion of the extract of coronate saw-wort (Serratula coronata L.) growing on the territory of Central Kazakhstan. The complex study of the structure and composition of the synthesized nanoparticles by scanning electron microscopy, energy-dispersive spectroscopy, and X-ray phase analysis shows that the nanoparticles contain no additional impurities, have the monoclinic structure, and possess a high degree of crystallinity; the average size of crystallites is 28 ± 4 nm. Catalytic activity is tested in methylene blue dye degradation under exposure to visible light (500 W, 7500 lm). The degradation efficiency is studied as a function of catalyst mass and initial dye concentration. It is shown that even at a catalyst loading of 10 mg more than 54% of the dye degrades in the reaction mixture. The study of catalyst stability demonstrates that the efficiency of degradation decreases by 6.1 and 33.3% after the second and fifth test cycle, respectively. Keywords: nanoparticles, copper(II) oxide, nanocatalyst, methylene blue, Serratula Coronata L., the wet combustion method DOI: 10.1134/S0965544120100084
A rapid progress of nanotechnologies and the intensive use of nanosized materials in biological and medical fields are the driving force for the development of new and improvement of existing methods and technologies of synthesizing nanomaterials [1–3]. The methods of green chemistry relying on the use of highly effective, inexpensive, and nontoxic biological resources for the synthesis of nanoparticles of metals and their oxides are of particular concern for researchers [4–6]. Among the diversity of metal nanoparticles obtained using plant extracts, the nanoparticles of metallic copper and copper (II) oxide are the most demanded research objects due to the ease of synthesis and unique size and physicochemical properties [7, 8]. CuO nanoparticles show considerable promise for use in various fields of materials science [9, 10], including catalysis [11]. In contrast to conventional synthetic methods the methods of green chemistry are not only environmentally friendly but also make it possible to synthesize nanoparticles free of trace impurities used in the synthesis of precursors and reducers. Previously, various plant reducers and secondary metabolites extracted from them have been successfully used in the synthesis of CuO nanoparticles usi
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