Chemical Research in Chinese Universities ›› 2019, Vol. 35 ›› Issue (4): 598-603.doi: 10.1007/s40242-019-8313-4

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Naked Eye and Selective Detection of Copper(Ⅱ) in Mixed Aqueous Media Using a Cellulose-based Support

FETTOUCHE Souad1,2, BOUKHRISS Aicha1, TAHIRI Mohamed2, CHERKAOUI Omar1, BAZI Fathallaah3, GMOUH Said4   

  1. 1. Laboratoire Recherche sur les Matériaux Textile(REMTEX), Ecole Supérieure des Induseries de Textile et de L'habillement(ESITH), Casablanca, BP 7731, Maroc;
    2. Laboratoire Hydrogéochimie et Bassin versant, Faculté des Sciences Ain Chock, Université Hassan Ⅱ, Casablanca, B. P 5366, Maroc;
    3. Laboratore Chimie Analytique et Physico-chimie des Matériaux, Faculté des Sciences Ben M'sik, Universitié Hassan Ⅱ, Casablanca, BP150, Macro;
    4. Laboratoire d'lngénierie et Matériaux(LIMAT), Faculté des Sciences Ben M'sik, Université Hassan Ⅱ, Casablance, BP150, Maroc
  • Received:2018-09-28 Revised:2018-12-21 Online:2019-08-01 Published:2019-08-01
  • Contact: GMOUH Said E-mail:souad.fettouche@gmail.com

Abstract: A new colorimetric sensor based-azo dye for Cu2+ detection was synthesized and characterized by FTIR and NMR spectroscopies. The results showed that the azo dye had a high selective and sensitive recognition toward Cu2+. The solution containing the sensor changed color from pink to pale yellow with a hypsochromic shift in the presence of Cu2+. The sensor selectivity and sensitivity toward Cu2+ions were investigated by colorimetry and UV-Vis spectroscopy. For practical applications, a cellulosic textile test strip for high-selectivity detection of Cu2+ ions in aqueous solution was developed using the synthesized azo dye as chromogenic chemosensor molecule, while using a solid cellulose textile as a substrate. As a result, a spectacular color change of the test strip was observed depending on the amount of copper ions in contact with the strip, which allows an estimation of Cu2+ concentration by naked eye.

Key words: Copper(Ⅱ) ions detection, Azo dye, Chromogenic chemosensor, Cellulose-based probe