Silver nanoparticles synthesized by UV-irradiation method using chloramine T as modifier: structure, formation mechanism and catalytic activity

Ultrasmall Ag NPs with different optical properties were synthesized by UV-irradiation method using chloramine T as an organic modifier. Two different formation mechanisms were identified for low and high concentration of chloramine T. It was confirmed that the use of low concentration of chloramine...

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Bibliographic Details
Published in:CrystEngComm 2018-11, Vol.2 (44), p.713-7136
Main Authors: Rado, Adrian, ukowiec, Dariusz
Format: Article
Language:English
Subjects:
Catalysis
Catalytic activity
Chemical synthesis
Crystal defects
Irradiation
Methylene blue
Nanoparticles
Optical properties
Silver chloride
Ultraviolet radiation
Weight
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Summary:Ultrasmall Ag NPs with different optical properties were synthesized by UV-irradiation method using chloramine T as an organic modifier. Two different formation mechanisms were identified for low and high concentration of chloramine T. It was confirmed that the use of low concentration of chloramine T allows the synthesis of highly reactive Ag NPs, whereas the use of high concentration of chloramine T results in the formation of crystalline AgCl. The performed catalytic investigation confirms that the proposed method can be used to synthesize nanoparticles with high catalytic activity for the reduction of methylene blue. It was noted that the rate constant over the total weight of the catalyst was equal to 8.34 g −1 s −1 , which is significantly high in comparison with the literature data. This high catalytic activity was related to the defects on the surface of Ag NPs. Two different formation mechanisms of Ag NPs by UV-irradiation method in the presence of chloramine T were identified.
ISSN:1466-8033
1466-8033
DOI:10.1039/c8ce01379a