An electrochemical investigation on ZnO nanoparticles decorated methylene blue (MB/ZnONPs)

Sedigheh Hashemnia¹ Zeinab Mokhtari² Zahra Solati³ Razieh Azimpanah⁴ Mahsa Nikoozad⁵

1) Persian gulf university, bushehr, E-mail:
2) yasuj university, yasuj, E-mail:
3) Persian gulf university, bushehr, E-mail:
4) Persian gulf university, bushehr,
5) Persian gulf university, bushehr,

Publication : 13th Biennial Electrochemistry Seminar of Iran(elect13pguac.ir)
Abstract :
With respect to the importance of Zinc Oxide Nanoparticles (ZnONPs) for biomedical applications and drug delivery, in this research the ZnONPs were successfully synthesized in a green approach then decorated with methylene blue and electrochemically were investigated. In compare with the methylene blue solution alone, the ZnONPs enhance the electrochemical activity of the methylene blue (MB) in a same concentration [1]. For electrochemical studies of the MB/ZnONP solution, conditions such as the pH, dye concentration and scane rate, were optimized. At the optimized conditions methylene blue in MB/ZnONP solution shows a well-defined redox couples at E⁰= -360 mV, which is comparable with MB solution alone at E⁰= -400 mV. Moreover this MB/ZnONP solution was successfully applied to the determination of Fe (III) under optimal conditions. The proposed iron electrochemical sensor is based on differential pales voltammetry (DPV). The response of Fe (III) at this resulting voltammetric sensor has been found to work well in the concentration range of 10-80 µM with the detection limit of 2.5 µM. The selectivity of the proposed sensor for Fe (III) has been confirmed by the estimation of the Fe (III), influence of possible interferences such as Zn (II), Ni (II), Co (II) and Cu (II) on the Fe (III) signal response were tested.
Keywords : methylene blue ZnO nanoparticles green synthesis electrochemical study.