Modern Chemistry & Applications

Synthesis of porous zinc oxide/carbon composites by zinc chloride activation of pine wood and aqueous treatment

International Conference on Applied Chemistry

October 17-18, 2016 Houston, USA

Svetlana Tsyganova, Elena Masurova and Nikolay Chesnokov

Institute of Chemistry and Chemical Technology SB RAS, Russia

Posters & Accepted Abstracts: Mod Chem appl

Abstract:

In this paper we report about the synthesis of ZnO/carbon composites as a candidate material for the supercapacitor electrode. Porous zinc oxide /carbon composites are prepared using chemical activation of pine wood with ZnCl2 and subsequent aqueous treatment. Mixture of finely chopped wood and zinc chloride were pyrolyzed at a heating rate of 10oC min-1 in a flow reactor at temperature interval of 300-800oC. Dynamic of yield, surface areas, morphologies and structural, thermal characteristics of solid product obtained at different temperatures without and with subsequent aqueous treatment were analyzed using multi-purpose high-performance X-ray diffraction (XRD), scanning electron microscopy, thermogravimetry and thermal desorption of the nitrogen. The growth evolution of hexagonal rods of zinc oxide from a mixture of pine sawdust and ZnCl2 during carbonization was shown. Formation of hexagonal wurtzite ZnO was observed at temperature above 300oC and its destruction took place at 800�°C. The synthesized composite material had a high specific surface area up to 1900 m2 g-1. The regularities of porous structure formation of the composite depending on temperature and subsequent aqueous treatment were presented. It has been supposed that the disclosure of composite porous structure during carbonization of modified pine appears simultaneously with the formation of water-insoluble crystal-amorphous carbon phase and hexagonal rods of oxide zinc.

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