Photocatalytic Degradation of Organic Pollutants: The Case of Conductive Polymer Supported Titanium Dioxide (TiO2) Nanoparticles: A Review
Tigabu Bekele Mekonnen,
Abi Tadesse Mengesha,
Hirpo Hinsene Dube
Issue:
Volume 7, Issue 1, June 2021
Pages:
1-13
Received:
28 January 2021
Accepted:
17 March 2021
Published:
7 April 2021
Abstract: In recent years development of different type of industries are enlarged and these industries are connected with the discarding of organic pollutants which are harmful to aquatic system and the human health. The presence of those organic pollutants in the aquatic system can result in pollution of wastewater which affects the ecosystem. Therefore, the removals of pollutants have become an ecological concern and they are vital for the environmental sustainability. Many practices have been widely applied in the treatment of organic effluent such as biological treatment, reverse osmosis, ozonation, filtration, adsorption on solid phases, incineration, and coagulation. However, each of the methodologies has its own advantages and limitations. The recent research demonstrates that advanced oxidation processes (AOPs) based on photocatalysts are valuable and this method benefits complete mineralization of organic molecules into nontoxic CO2 and H2O at the atmospheric conditions by generating active species such as hydroxyl radicals (•OH) which can remove even non-biodegradable organic compounds from wastewater. These review papers give an overview of the enhanced photocatalytic activities of titanium dioxide (TiO2) based photocatalyst. An effort has also been made to give an overview of expedient photocatalytic activity of these supported nanoparticles for their potential application in environmental remediation. In this review article also, various methods used to enhance the photocatalytic characteristics of TiO2 including doping, coupling and other supporting are discussed. It is observed that the degradation of dyes depends on several parameters like pH, catalyst load, dye concentration, reaction temperature and scavengers on the degradation of dyes.
Abstract: In recent years development of different type of industries are enlarged and these industries are connected with the discarding of organic pollutants which are harmful to aquatic system and the human health. The presence of those organic pollutants in the aquatic system can result in pollution of wastewater which affects the ecosystem. Therefore, t...
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An Overview on the Photocatalytic Degradation of Organic Pollutants in the Presence of Cerium Oxide (CeO2) Based Nanoparticles: A Review
Issue:
Volume 7, Issue 1, June 2021
Pages:
14-26
Received:
28 January 2021
Accepted:
17 March 2021
Published:
20 April 2021
Abstract: Considerable efforts have been devoted to enhancing the photocatalytic activity and solar energy utilization of photocatalysts. Photocatalysis has attracted much attention in recent years due to its potential in solving energy and environmental issues. The fabrication of various materials (coupled or doped) to form heterojunctions provides an effective way to better harvest solar energy and to facilitate charge separation and transfer, thus enhancing the photocatalytic activity and stability. Efficient light absorption and charge separation are two of the key factors for the exploration of high performance photocatalytic systems, which is generally difficult to be obtained in a single photocatalyst. In this review, we briefly summarizes the recent development heterostructured semiconductors, including the preparation and performances of semiconductor/semiconductor junctions, semiconductor/metal junctions, and their mechanism in the area of environmental remediation and water splitting for enhanced light harvesting and charge separation/transfer, describe some of the progress and resulting achievements, and discuss the future prospects. The scope of this review covers a variety of type photocatalysts, focusing particularly on Ceria (CeO2) heterostructured photocatalysts. We expect this review to provide a guideline for readers to gain a clear picture of fabrication and application of different type heterostructured photocatalysts.
Abstract: Considerable efforts have been devoted to enhancing the photocatalytic activity and solar energy utilization of photocatalysts. Photocatalysis has attracted much attention in recent years due to its potential in solving energy and environmental issues. The fabrication of various materials (coupled or doped) to form heterojunctions provides an effec...
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