Real-time colorimetric detection of dissolved carbon dioxide using pH-sensitive indicator based on anthocyanin and PVA coated green iron oxide nanoparticles at room temperature

Aksu Demirezen D., Demirezen Yılmaz D.

INORGANIC AND NANO-METAL CHEMISTRY, cilt.52, sa.6, ss.761-771, 2022 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 52 Sayı: 6
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1080/24701556.2021.1980032
  • Dergi Adı: INORGANIC AND NANO-METAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED)
  • Sayfa Sayıları: ss.761-771
  • Anahtar Kelimeler: Dissolved carbon dioxide, colorimetric monitoring, PVA, anthocyanin, iron oxide Nanoparticles
  • Erciyes Üniversitesi Adresli: Evet

Özet

In this study, a pH-sensitive indicator solution for the colorimetric naked-eye detection of dissolved carbon dioxide at room temperature was developed with the aim of environmental monitoring. The indicator solution was produced by the polyvinyl alcohol-coated green synthesized iron oxide nanoparticles and the natural anthocyanin extracted from red cabbage. The pH change upon carbon dioxide dissociation occurred in the indicator solution. The reaction was investigated using the stopped-flow method by monitoring the pH measurements at different dissolved CO2 concentrations. The indicator solution changed color from blue to pink within a few seconds with pH change on the acidic side and returned to its initial state spontaneously without any treatment at the end of the CO2 gas. The indicator solution showed sensitivity to dissolved CO2 concentrations in the range of 600 - 3200 ppm in a fast reaction time and complete reversibility.