Thiol-modified activated carbon material for sensor technology

Anar Zhexembekova, Nuriya Akhmetova, Anara Molkenova, Zhumabay Bakenov, Danny O'Hare

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Activated carbon (AC) is a material of great potential in production of membranes for a construction of novel electrochemical sensors due to highly microporous structure and greater surface area per unit volume [1]. Herein we report the production of thiol-modified activated-carbon-based composite. It was obtained by treatment of ketjen black (KB) with concentrated nitric acid (69 wt.%) and further mixing with sulfur (5 wt.%) through high-energy ball milling process. The obtained composite underwent two-stage heat treatment in a tubular furnace under an atmosphere of Ar followed by 4% H2 in N2. All samples were characterized using thermogravimetric analysis (TGA) and Fourier transform infrared spectroscopy (FT-IR). The presence of thiol functional was validated by absorbance peaks at around 665 cm-1 and 2360 cm-1. As revealed by TGA, sulfur doped activated KB (KB/S) underwent significant mass loss (70.5%) compared with KB (0.8%), which corresponds to an increase in the effective surface area.

Original languageEnglish
Pages (from-to)4599-4602
Number of pages4
JournalMaterials Today: Proceedings
Volume4
Issue number3
DOIs
Publication statusPublished - 2017
Externally publishedYes

Keywords

  • Absorbance
  • Microporous membrane
  • Sensing electrode
  • Sensors
  • Surface area
  • Thiol-modified carbon
  • Working electrode

ASJC Scopus subject areas

  • Materials Science(all)

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