Electrochemical detection of 2-nitrophenol using a heterostructure ZnO/RuO2 nanoparticle modified glassy carbon electrode

Md Tamez Uddin; Md Mahmud Alam; Abdullah Mohamed Asiri; Mohammed Muzibur Rahman; Thierry Toupance; Md Akhtarul Islam

doi:10.1039/c9ra08669b

Electrochemical detection of 2-nitrophenol using a heterostructure ZnO/RuO₂ nanoparticle modified glassy carbon electrode

RSC Adv. 2019 Dec 24;10(1):122-132. doi: 10.1039/c9ra08669b. eCollection 2019 Dec 20.

Authors

Md Tamez Uddin¹, Md Mahmud Alam¹, Abdullah Mohamed Asiri^{2

3}, Mohammed Muzibur Rahman^{2

3}, Thierry Toupance⁴, Md Akhtarul Islam¹

Affiliations

¹ Department of Chemical Engineering and Polymer Science, Shahjalal University of Science and Technology Sylhet 3114 Bangladesh mtuddin_cep@yahoo.com +880 821 715257 +880 821 717850 ext. 681.
² Chemistry Department, King Abdulaziz University, Faculty of Science P.O. Box 80203 Jeddah 21589 Saudi Arabia.
³ Center of Excellence for Advanced Material Research (CEAMR), King Abdulaziz University P.O. Box 80203 Jeddah 21589 Saudi Arabia.
⁴ Institut des Sciences Moléculaires, Univ. Bordeaux, UMR 5255 CNRS 351 Cours de la Libération F-33405 Talence Cédex France.

Abstract

A highly selective chemisensor for 2-nitrophenol detection was fabricated using ZnO/RuO₂ nanoparticles (NPs) synthesized by impregnation method. The as-synthesized NPs were characterized through UV-vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), Energy dispersive X-ray spectroscopy (EDS), FTIR and X-ray diffraction (XRD). A glassy carbon electrode was modified with as-synthesized ZnO/RuO₂ nanoparticles and utilized as a chemical sensor for the detection of 2-nitrophenol. The fabricated sensor exhibited excellent sensitivity (18.20 μA μM^-1 cm^-2), good reproducibility, short response time (8.0 s.), the lowest detection limit (52.20 ± 2.60 pM) and long-term stability in aqueous phase without interference effects. Finally, the fabricated sensor was validated as a 2-NP probe in various environmental water samples at room conditions.