Aerogel for Highly Efficient Photocatalytic Degradation

• Published in: Gels Vol. 10; no. 2; p. 100
• Main Authors: Yang, Xue-Chun, Zhao, Jing-Tai
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 01.01.2024
• Subjects: aerogel; Aerogels; agar; Amoxicillin; Antibiotics; Carbon; carbon dots; Carbon nitride; Carrier density; Catalysis; China; Drug resistance in microorganisms; Energy conversion; Functional groups; g-C3N4; Graphene; Oxytetracycline; Particle size; Photocatalysis; Photodegradation; Photoelectric effect; Photoelectric emission; Pollutants; Precious metals; Sintering; Technology application; Ternary systems; Water pollution; China; g-C3N4; amoxicillin; carbon dots; agar; aerogel
• ISSN: 2310-2861; 2310-2861
• DOI: 10.3390/gels10020100

Photocatalysis is one of the effective ways to degrade pollutant antibiotics. Agar is used as the adsorption module to provide abundant pore structure. Carbon dots (CDs) are selected as light energy conversion components. Graphitic carbon nitride (g-C N ) is used as the main material of the catalyst. Agar/CDs/g-C N -functionalized aerogel with a unique 3D pore structure is assembled. The Agar/CDs/g-C N aerogel shows the highest photocurrent density, which is 3.7 times that of agar, 2.4 times that of 3-g-C N and 1.6 times that of Agar/g-C N aerogel. Compared with 3-g-C N and Agar/g-C N aerogel, which can completely remove AMX after 75 min, Agar/CDs/g-C N aerogel can degrade amoxicillin (AMX) completely after 45 min of illumination. The reason is that Agar/CDs/g-C N aerogel has a larger specific surface area, richer functional groups, a wider spectral range, higher photocurrent density and better carrier migration and separation efficiency. It is a good strategy with which to combine the effects of each component in the ternary system for the efficient photocatalysis of organic pollutants.