title: Passivated iodine pentoxide oxidizer for potential biocidal nanoenergetic applications.
abstract: Iodine pentoxide (I2O5), also known as diiodine pentoxide, is a strong oxidizer which has been recently proposed as an iodine-rich oxidizer in nanoenergetic formulations, whose combustion products lead to molecular iodine as a biocidal agent. However, its highly hygroscopic nature hinders its performance as a strong oxidizer and an iodine releasing agent and prevents its implementation. In this work, we developed a gas phase assisted aerosol spray pyrolysis which enables creation of iron oxide passivated I2O5. Transmission electron microscopy elemental imaging as well as temperature-jump mass spectrometry confirmed the core shell nature of the material and the fact that I2O5 could be encapsulated in pure unhydrated form. Combustion performance finds an optimal coating thickness that enables combustion performance similar to a high performing CuO based thermite.
authors.affiliation: Department of Chemistry and Biochemistry, and Department of Chemical and Biomolecular Engineering, University of Maryland , College Park, Maryland 20742, United States.
authors.forename: Jingyu
authors.initials: J
authors.lastname: Feng
authors.forename: Guoqiang
authors.initials: G
authors.lastname: Jian
authors.forename: Qing
authors.initials: Q
authors.lastname: Liu
authors.forename: Michael R
authors.initials: MR
authors.lastname: Zachariah
mesh_terms: D000336:Aerosols / Q000737:chemistry; D005290:Ferric Compounds / Q000737:chemistry; D005740:Gases / Q000737:chemistry; D017613:Iodine Compounds / Q000138:chemical synthesis / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000138:chemical synthesis / Q000737:chemistry*; D013696:Temperature
chemical_list: D000336:Aerosols; D005290:Ferric Compounds; D005740:Gases; D017613:Iodine Compounds; D010087:Oxides; C000499:ferric oxide; C555514:iodine pentoxide