Los sistemas de aeronaves remotamente tripulados de ala rotatoria en el ámbito militar se han convertido en aeronaves con aplicación táctica en el reconocimiento y la vigilancia de gran utilidad, factor que ha promovido incrementos en la investigación y el desarrollo de estos sistemas desde 2012 hasta la actualidad. Una búsqueda bibliográfica en Scopus permitió identificar 1166 documentos, que fueron tratados mediante el software vosViewer, organizando la información en conceptos básicos y clasificación, sistemas de los rpas y sus aplicaciones militares. El estudio permitió evidenciar que Estados Unidos ha liderado la investigación en el área, que podría estar relacionada con las implicaciones de la tecnología en el desarrollo de múltiples conflictos armados, y que las Fuerzas Aéreas en cada país han sido los principales patrocinadores o investigadores en el desarrollo de esta tecnología.
In this work, the effect of the addition of iridium on TiO2 and Nb2O5 supports obtained by wet impregnation method was evaluated in the photocatalytic degradation of 2,4-dichlorophenoxiacetic acid under UV irradiation. The synthetized materials were analyzed by different techniques in order to determinate their physicochemical properties. In general, it was observed that the addition of iridium modifies the surface area, band gap energy and it enhances the crystallinity of the materials. Besides, an increase in the photoactivity in the degradation of the herbicide was evidenced using the materials modified. However, the Ir/TiO2 photocatalyst possess the best photocatalytic behavior toward the degradation and possible mineralization of the herbicide. The improved performance of the photocatalyst could be argued by the role of the iridium particles as electron collectors favoring the effective separation of the charge carriers and, as consequence, increasing the degradation of the molecule.
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