Chemical Dissolution Pathways of MoS2 Nanosheets in Biological and Environmental Media.

ABSTRACT: Material stability and dissolution in aqueous media are key issues to address in the development of a new nanomaterial intended for technological application. Dissolution phenomena affect biological and environmental persistence; fate, transport, and biokinetics; device and product stability; and toxicity pathways and mechanisms. This article shows that MoS2 nanosheets are thermodynamically and kinetically unstable to O2-oxidation under ambient conditions in a variety of aqueous media. The oxidation is accompanied by nanosheet degradation and release of soluble molybdenum and sulfur species, and generates protons that can colloidally destabilize the remaining sheets. The oxidation kinetics are pH-dependent, and a kinetic law is developed for use in biokinetic and environmental fate modelin

SUBMITTER: Wang Z 

PROVIDER: S-EPMC5217159 | biostudies-literature | 2016 Jul

REPOSITORIES: biostudies-literature