OR3-21 The catalysis defined by structural defects and crystallinity: a case study with the catalyst NiMoO4

Resumo

Chemoselective oxidation of sulfides to sulfone under mild conditions is relevant to industry, but challenging due to the need to establish catalysis mechanisms and optimize various experimental parameters. In this work, the synthesis of NiMoO₄ as efficient and selective catalysts for sulfides transformation into sulfones, focusing on crystallinity studies and structural defects of the material. NiMoO₄ were synthesized by the microwave hydrothermal method and these samples were treated in a microwave furnace for analysis of the influence of the crystalline structural on the selectivity and conversion of these catalysts. Thianisole oxidation was carried out in this work as a source of research for the case study of NiMoO₄. The results show that the defects generated are more important than the crystallinity generated, in this case, to improve selectivity in lower oxidation reaction times. These results open a path to semiconductor oxidation processes in complete darkness, exceeding the limitation of light, required in a wide range of applications.