SYNTHESIS AND CHARACTERIZATION OF MOLYBDENUM CARBIDE FOR USE AS HETEROGENEOUS PHOTOCATALYZERS

Reference Presenter Authors
(Institution)
Abstract
06-151 Suylan Lourdes de Araújo Dantas Dantas, S.L.(Universidade Federal do Rio Grande do Norte); Moriyama, A.L.(Universidade Federal do Rio Grande do Norte); Souza, C.P.(Universidade Federal do Rio Grande do Norte);

The principle of heterogeneous photocatalysis is related to the activation of an inorganic semiconductor through sun light or artificial light that provokes the electronic transition in the semiconductor layers. Transition metal carbides have been extensively studied over the last decades in relation to their catalytic activity, stability and selectivity in a wide range of reactions. With this in mind, this work aims to develop the study of the synthesis and characterization of semiconductor materials with a carbide type structure, based on abundant elements, both nationally and locally, in terms of the state of Rio Grande do Norte, and using the method of gas-solid reaction in a fixed bed reactor for application in a photocatalytic reactor using the textile dye Maxilon Blue GRL 300%. Based on a literature review, and on previously obtained results, the material to be studied Mo2C had its physicochemical characteristics evaluated using several techniques of analysis, such as DRX, TGA, BET and MEV. With the adequate characterization of this material, it is possible to understand the relation between its structural properties and its activities as catalysts and active materials for photocatalysis. From the XRD results, the formation of the carbide can be obtained from the wet production method, and the phases and peaks characteristic of each material are identified. With the TGA results of the post-precursors, the thermal study was carried out, confirming the operating temperatures of the fixed bed reactor. In the process of photocatalysis using the dye Maxilon Blue and the molybdenum carbide, it was observed the reduction of the initial dye concentration of 10ppm to approximately 2ppm in the various reaction times, causing a removal of about 80% of dye in the solution.