Dye rejection membranes prepared from oxidized graphite particles

作者：Colomba Anastasia; Biesinger Mark C; Divigalpitiya Ranjith; Brandys Frank A; Gilroy Joe B^*

来源：Canadian Journal of Chemistry, 2017, 95(11): 1103-1109.

DOI：10.1139/cjc-2016-0628

• dye rejection membranes
• materials characterization
• chemically modified graphite
• carbon-based materials
• waste water purification

This article reports the comparison of different chemical methods to produce graphite-based particles with varying degrees of oxidation, as well as graphene oxide (GO) and pristine graphite (PG). Detailed physicochemical characterization of the resulting materials was carried out, highlighting structural differences and variable oxygen content. The particles were then used to produce supported membranes that were tested for the rejection of three different organic dyes (Rhodamine B, Methyl Blue, and Congo Red), and their performance was rationalized in terms of a combination of properties of the membranes and dyes. In particular, membranes produced using edge-oxidized graphite (EOG) showed comparable performance with those derived from GO in the removal of Congo Red, providing a promising alternative to the aforementioned membranes.

• 出版日期2017-11