Structural characterization of chitosan-smectite nanocomposite and its application in the development of a novel potentiometric monohydrogen phosphate-selective sensor. (February 2018)

• Record Type: Journal Article
• Authors: Topcu, Cihan; Caglar, Bulent; Onder, Ahmet; Coldur, Fatih; Caglar, Sema; Guner, Eda Keles; Cubuk, Osman; Tabak, Ahmet
• Is Part Of: Materials research bulletin. Volume 98(2018)
• Page Start: 288
• Page End: 299
• Publication Date: 2018-02
• Subjects: Clay -- Chitosan -- Composite -- Monohydrogen phosphate -- Potentiometric sensor; Materials -- Periodicals; Crystal growth -- Periodicals; Matériaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Crystal growth; Materials; Periodicals; 620.11
• DOI: 10.1016/j.materresbull.2017.09.068
• Languages: English
• ISSNs: 0025-5408

Abstract

Graphical abstract: Highlights: Protonated chitosan molecules intercalated into the smectite layers as monolayered arrangement. A novel HPO4 2− selective potentiometric electrode based on the chitosan-smectite nanocomposite was constructed. Easy to prepare, low-cost, and highly selective potentiometric sensor. 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.