Affiliation:
1. Centre de Recherche Paul Pascal CRPP UMR5031-CNRS Université de Bordeaux 115 Avenue du Dr Albert Schweitzer 33600 Pessac France
Abstract
AbstractExternal diffusion may be exploited as a tool to purify materials in a way thought to be inaccessible from a chemical reactivity point of view. A mixture of two carbonaceous materials, graphite and carbon black, are thermally oxidized in either i) outside total diffusion‐limited regime or ii) total diffusion‐limited regime. Depending on the treatment applied it is possible to purify either graphite, a trivial task, or carbon black, a task thought impossible. Introducing geometrical selectivity, controlled total diffusion‐limited chemistry exceeds by far the field of carbon materials and can be used as an engineering tool for many materials purification, original synthesis, or to introduce asymmetry in a system. Several examples for direct applications of the findings are mentioned.
Funder
Agence Nationale de la Recherche
Centre National de la Recherche Scientifique