Structural characterization of chitosan-smectite nanocomposite and its application in the development of a novel potentiometric monohydrogen phosphate-selective sensor

Topcu C., Çağlar B., Onder A., Çoldur F., Çağlar S., Keleş Güner E., ...More

MATERIALS RESEARCH BULLETIN, pp.288-299, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Publication Date: 2018
  • Doi Number: 10.1016/j.materresbull.2017.09.068
  • Journal Name: MATERIALS RESEARCH BULLETIN
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.288-299
  • Keywords: Chitosan, Clay, Composite, Monohydrogen phosphate, Potentiometric sensor
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

Chitosan-smectite biocomposite was prepared by intercalation of protonated chitosan molecules into the interlayer space of smectite in monolayer arrangement through cation exchange mechanism and the obtained biocomposite was successfully used as an electroactive component in the structure of a PVC membrane potentiometric sensor for the direct and highly selective determination of monohydrogen phosphate ions. The comparative elemental, structural, thermal and morphological analysis of starting-smectite, neat chitosan and chitosan-smectite were investigated by utilizing EDX, XRD, ATR-FTIR, TG/DTG/DTA, SEM and surface area measurement techniques. The optimum membrane composition, detection limit, response time, pH working range and repeatability of the proposed electrode were determined.