Effect of microwave power intensity on synthesis of mesoporous titania nanoparticles for degradation of 2,4-dichlorophenol: Photoactivity performance and kinetic studies

Abstract

In this study, mesoporous titania nanoparticles (MTN) were synthesized via microwave (MW)-assisted method under various heating power (0.12 (MTN1), 0.37 (MTN2) and 0.56 (MTN3) Wg−1). The performance of MTN was investigated on photocatalytic degradation of 2,4-dichlorophenol (2,4-DCP) in aqueous solution using a batch reactor under visible light irradiation. The catalysts were characterized by XRD, UV-Vis DRS, BET and FTIR. The degradation of 2,4-DCP showed that catalyst synthesized at MTN2 was the most effective with 89.43% degradation compared to MTN1 and MTN3 with 82.93% and 86.99%, respectively. This result probably MTN2 has the lowest band gap and highest surface area compared to MTN1 and MTN3. The kinetic studies for degradation 2,4-DCP using MTN2 revealed that the reaction followed pseudo-first order kinetics with reaction rate values (kapp ) decreased as the initial concentration increased that proved the system was preferable at low concentration.

Electrogenerated Copper Supported Zinc Oxide for Degradation of 2,4-Dichlorophenol

“…The majority of the pollutants such as phenols, biphenyls, organic dyes, pesticides, herbicides, and drugs are produced in industrial plants contaminated with toxic and hazardous organic compounds [3]. Chlorophenols (CPs), especially 2,4-dichlorophenol (2,, are a class of pollutants that have attracted the attention of researchers due to their great potential to affect human health and the environment [4]. They have a high toxic effect and have become one of the most critical environmental problems in the world today, especially for the aquatic ecosystem, such as clogging of sewage treatment plants, harmful effects on aquatic biota, and increased amount of biochemical oxygen [5,6].…”

Mesoporous titania nanoparticles as photocatalyst for degradation of 2-chlorophenol

“…Advanced Oxidation Processes (AOP) is a highly potential method in removal of micropollutants where use light irradiation and catalyst to produce reactive oxygen species (ROS) such as hydroxyl radicals ( • OH) [5]. It also has a ability to transform pollutants in a large amount at a time into a more durable and harmless compounds [6]. Photocatalysis is one of the AOPs which involve a chemical reaction driven by light absorption on photocatalyst without having any chemical changes during and after the reaction.…”