Preparation MnO2 NPs by Sol-Gel method and Study Antioxidant Properties

Abstract

Manganese dioxide nanoparticles (MnO₂ NPs) is a well-known pseudocapacitive substance that has been widely discovered It has been studied and greatly appreciated, especially for its antioxidant and antibacterial activities. The current study aims to manufacture manganese dioxide nanoparticles, characterize them, and study their properties as antioxidants. In this work, Nano of  MnO₂ was created using the sol-gel method, which involved dissolving manganese nitrate in distilled water to create a solution, adding urea, heating the solution for three hours at 100 C to create a gel, and drying the gel for an additional hour at 280 °C to create manganese oxide powder. The resultant substance was examined using SEM and X-ray diffraction methods, and compared with JCPDS card number 00-044-0141. The material was discovered to be a quaternary crystal system. Using the Debye-Scherer equation, the crystal size was determined to be 37 nm. The highest free radical scavenging activity is by MnO₂ NPs  compared to standard, with estimates of 92.51 ± 1.3%, and 81.44 ± 2.1%. The results of the current study indicate the antioxidant effect of MnO2-NPs, which indicates their promising medical applications and opens new horizons for their use in further applications.