Preparation of MnO2-Carbon Materials and Their Applications in Photocatalytic Water Treatment

Abstract

Water pollution is one of the most important problems in the field of environmental protection in the whole world, and organic pollution is a critical one for wastewater pollution problems. How to solve the problem effectively has triggered a common concern in the area of environmental protection nowadays. Around this problem, scientists have carried out a lot of research; due to the advantages of high efficiency, a lack of secondary pollution, and low cost, photocatalytic technology has attracted more and more attention. In the past, MnO2 was seldom used in the field of water pollution treatment due to its easy agglomeration and low catalytic activity at low temperatures. With the development of carbon materials, it was found that the composite of carbon materials and MnO2 could overcome the above defects, and the composite had good photocatalytic performance, and the research on the photocatalytic performance of MnO2-carbon materials has gradually become a research hotspot in recent years. This review covers recent progress on MnO2-carbon materials for photocatalytic water treatment. We focus on the preparation methods of MnO2 and different kinds of carbon material composites and the application of composite materials in the removal of phenolic compounds, antibiotics, organic dyes, and heavy metal ions in water. Finally, we present our perspective on the challenges and future research directions of MnO2-carbon materials in the field of environmental applications.

Green Synthesis of Nanoparticles and Their Energy Storage, Environmental, and Biomedical Applications

“…In addition to its notable catalytic properties, the widespread availability and affordability of MnO 2 make it a preferred choice for organic dye removal. Moreover, MnO 2 displays a diverse range of crystal structures and morphologies, enhancing its suitability for photocatalytic applications [267].…”

Green Synthesis of Metal and Metal Oxide Nanoparticles for Recent Applications

“…In addition to its notable catalytic properties, the widespread availability and affordability of MnO2 make it a preferred choice for organic dye removal. Moreover, MnO 2 displays a diverse range of crystal structures and morphologies, enhancing its suitability for photocatalytic applications [270]. The photocatalytic efficiency of green-synthesized MnO2 nanoparticles using Y. gloriosa leaf and curcumin extracts for degrading acid orange as an organic contaminant was previously studied, with decomposition results reported [145].…”