Flexible nanoporous activated carbon for adsorption of organics from industrial effluents

Usama Zulfiqar, Nikolaos Kostoglou , Andrew Thomas, Claus Rebholz, Allan Matthews, David Lewis

Research output: Contribution to journalArticlepeer-review

130 Downloads (Pure)

Abstract

This paper reports a study involving the formation of a self-assembled polymeric monolayer on the surface of a high surface area activated carbon to engineer its affinity towards organic contaminants. A nanoporous activated carbon cloth with a surface area of ~1220 m2/g and a pore volume of ~0.42 cm3/g was produced by chemical impregnation, carbonisation and high-temperature CO2 activation of a commercially available viscose rayon cloth. The subsequent modification with a silane polymer resulted in a nanoscale self-assembled monolayer that made it selective towards organic solvents (contact angle <10°) and repellant towards water (contact angle >145°). The adsorbent showed more than 95% efficiency in the separation of various types of oil/water mixtures under neutral, basic and acidic conditions. Benefiting from inherent nanoscale features, a robust hierarchical structure and a thermally stable monolayer (~300 °C), this nanoporous adsorbent maintained high efficiency for more than 20 cycles and separated surfactant stabilised emulsion with >92% oil removal efficiency. The adsorbent was studied extensively with a series of advanced characterisation techniques to establish the formation mechanism and performance in emulsion separation. Findings from this work provide crucial insights towards large-scale implementation of surface engineered activated carbon-based materials for a wide range of industrial separation applications.
Original languageEnglish
Pages (from-to)15311-15323
Number of pages13
JournalNanoscale
Volume13
Issue number36
Early online date27 Aug 2021
DOIs
Publication statusPublished - 28 Sept 2021

Fingerprint

Dive into the research topics of 'Flexible nanoporous activated carbon for adsorption of organics from industrial effluents'. Together they form a unique fingerprint.

Cite this