Influence of Synthesis Approach on Controlled Microstructures and Photocatalytic Properties of Ag/AgBr-Activated Carbon Composites on Visible Light Degradation of Tetracycline
Autor: | Hendrik Gideon Brink, S. O. Sanni, Elvera L. Viljoen |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
reactive oxygen species
Materials science Chemical technology Composite number Nanoparticle TP1-1185 Catalysis silver/silver bromide Chemistry controlled microstructures medicine Photocatalysis activated carbon Particle size Physical and Theoretical Chemistry Composite material Dispersion (chemistry) tetracycline degradation QD1-999 Activated carbon medicine.drug Visible spectrum |
Zdroj: | Catalysts Volume 11 Issue 11 Catalysts, Vol 11, Iss 1396, p 1396 (2021) |
ISSN: | 2073-4344 |
DOI: | 10.3390/catal11111396 |
Popis: | The influence of the synthesis approach (thermal polyol and deposition–precipitation) regarding the dispersion of Ag/AgBr nanoparticles dispersed on activated carbon prepared from chemical impregnated pinecone (TP-AABR-ACK, and DP-AABR-ACK) was studied, to increase their photocatalytic efficiency on the degradation of tetracycline (TC). The physicochemical characterization evidenced the significance of the ACK catalyst promoter in enhancing controlled microstructures (morphologies and particle size distributions), synergistic interface interaction between AABR NPs and the carbonaceous support, and efficient photogenerated charge carriers separation within TP-AABR-ACK, and DP-AABR-ACK composites. The results revealed 92% removal of TC within 180 min under the LED visible light irradiation, which was achieved using TP-AABR-ACK when compared to DP-AABR-ACK composite and other catalysts in this study. Such superior results achieved with TP-AABR-ACK composite were attributed to controlled morphologies, reduced particle size and agglomeration, improved absorptivity, and superior cooperative effect between the AABR and ACK catalyst promoter as evidenced from SEM, EDX, TEM, UV-DRS, and electrochemical characterizations, respectively. Furthermore, enhanced TOC removal and abundance of reactive superoxide anion generation were achieved with the TP-AABR-ACK composite in this study. |
Databáze: | OpenAIRE |
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