Kinetic Study of photocatalytic removal of methylene Blue dye using Ag nanoparticles

Subject Areas : The Application of Chemistry in Environment

پروین غربانی ¹ , Arezu Ghadi ² , Mosavi موسوی ³ , Ali Mehrizad ⁴

1 - دانشگاه آزاد اسلامی واحد اهر
2 - Department of Chemistry, Ahar Branch, Islamic Azad University, Ahar, Iran
3 - Department of Chemical Engineering, Islamic Azad University, Ayatollah Amoli Branch, Amol, Iran
4 - Department of Chemistry, Tabriz Branch. Islamic Azad University

Received: 2021-09-19 Accepted : 2021-10-10 Published : 2020-04-20

Keywords: Silver, Methylene Blue, Photocatalyst,

Abstract :

Methylene blue dye is the most common dye for dyeing cotton, wool and silk. Inhalation of this dye can cause respiratory distress and while direct exposure to it can also cause permanent eye damage, burning sensation in the exposed areas, Nausea and vomiting, excessive sweating and mental disorders. In this paper, silver nanoparticles was synthesized via a simple method. Various techniques such as FESEM, XRD, UV-Vis DRS were used to identify the morphology, structural composition and optical properties of synthesized silver nanoparticles. The results of UV-Vis DRS showed that the prepared silver nanoparticles effectively improved the efficiency of the visible light response in the process of photocatalytic degradation of methylene blue dye. The results of pseudo-first-order linear kinetics showed that the value of k increased with increasing of MB dye concentration from 0.0264 to 0.0614 min-1. In general, nano-silver synthesis showed a high potential in removing MB dye from aqueous solutions.