Nanocomposites and Nanomaterials

Synthesis and characterizations of ZnO nanopowders:
A green chemistry approach
Fesych I.V.1, Voitenko T.A.1, Nedilko S.A.1, Dziazko O.G.1, Zelenko M.A.1, Sabadash N.I.2
1 Faculty of Chemistry, Taras Shevchenko National University of Kyiv 
Lva Tolstoho Street, 12, Kyiv, 01033, Ukraine. 
E-mail: voitana@ukr.net
2 Faculty of Biotechnology and Environmental Control, National University of Food Technology, Kyiv, Ukraine, Volodymyrska street, 68, Kyiv, 01601, Ukraine.

Zinc oxide nanopowders are an important metal oxide with unusual semiconducting properties and wide application in various fields, such as catalysis, optic, pigment, piezoelectric devices, chemical sensors, cosmetic ingredients, medicine. Due to the large numerous of toxic chemicals and extreme environment employed in the chemical production of ZnO nanopowders, green chemistry methods employing the use of different biological materials (plants, fungus, bacteria, algae) and natural polymers (gelatin, starch, different proteins) have been adopted [1]. Besides that, the use of natural sources in the synthesis of nanomaterials can have a low cost and eco-friendly approach.
In this paper, we studied the green chemical approach for fabrication method using natural polymer and the physical and chemical characteristics of zinc oxide nanopowders.
ZnO nanopowders were synthesized by sol-gel technique [2] with gelatin as a green stabilizer. Synthesized ZnO nanopowders have been characterized by XRD, FTIR, SEM and DTA/TG. X-ray diffraction pattern shows a wurtzite structure (hexagonal phase) with high crystallinity. From SEM results size and morphology of ZnO nanoparticles have been analyzed. Crystallite sizes and lattice strain were studied by using Williamson-Hall method.

1.	Agarwal Happy, Kumar S. Venkat, Rajeshkumar S. A review on green synthesis of zinc oxide nanoparticles –An eco-friendly approach // Resource-Efficient Technologies.-2017.-3.-P. 406–413. 
2.	Pilipenko, A.O., Nedilko, S.A., Dziazko, O.G., Voitenko, T.A., Fesich, I.V., Zelenko, M.A., Strutynska, N.Yu., Galagan, Y., Golovchenko, O.I. High-temperature superconducting nanocomposites and their stability // IEEE 7th International Conference Nanomaterials: Application & Properties.-2017.-P. 03NNSA24-1 – 03NNSA24-4.