Chapter 18 - Magnetic nanoparticles and nanocomposites for the applications of photocatalytic degradation of organic dyes

Abstract

The utilization of photocatalysts to produce renewable energy and clean up the environment has attracted a lot of study attention. Recently, numerous publications about the photocatalytic degradation of dyes utilizing magnetic nanoparticles have been published. The purpose of this chapter is to draw attention in photocatalysis using magnetic nanoparticles in the degradation of dyes mostly used in textile industries. It has been outlined how magnetic nanoparticles are made, including coprecipitation, solvothermal, hydrothermal, sol–gel, and sonochemical processes. Magnetic nanoparticle–based degradation of different organic dyes is investigated. The majority of the papers discuss how methyl orange, methylene blue, and rhodamine B dyes degrade. Numerous substances have been shown to exhibit strong photocatalytic activity when exposed to visible, sunlight, and ultraviolet irradiation. The efficacy of composite semiconductors and surface modifications of iron oxide with impurity doping is examined. By maximizing the number of variables, including pH, catalyst dosage, dye concentration, irradiation period, and light intensity during the process, the efficiency can be regulated. Here, we address operational parameter optimization and how it affects dye photocatalytic degradation.