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Biogenic Synthesis of Silver Nanoparticles with High Antimicrobial and Catalytic Activities using Sheng Di Huang ( Rehmannia glutinosa )
Author(s) -
Yong Doreen W. Y.,
Lieu Zi Zhao,
Cao Xujun,
Yong Xin Ee,
Wong Jireh Z. L.,
Cheong Yuan Shan,
Browder Laney K.,
Chin Wee Shong
Publication year - 2021
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.202001146
Subject(s) - rehmannia glutinosa , silver nanoparticle , antimicrobial , chemistry , phytochemical , crystallinity , catalysis , herb , nuclear chemistry , nanoparticle , traditional medicine , medicinal herbs , nanotechnology , materials science , organic chemistry , biochemistry , traditional chinese medicine , medicine , alternative medicine , pathology , crystallography
Silver nanoparticles (AgNPs) are widely sought after for a variety of biomedical and environmental applications due to their antimicrobial and catalytic properties. We present here a green and simple synthesis of AgNPs utilizing traditional Chinese medicinal herbs. The screening of 20 aqueous herb extracts shows that Sheng Di Huang ( Rehmannia glutinosa ) had the most promising potential in producing AgNPs of 30±6 nm, with narrow size distribution and high crystallinity. The antimicrobial activities of these AgNPs conducted on E. coli cells were found to be superior in comparison to poly(vinylpyrrolidone)‐capped AgNPs synthesized using common chemical method. Additionally, the AgNPs obtained possess excellent catalytic performance in the reduction of 4‐nitrophenol to 4‐aminophenol. We compared the phytochemical and FTIR spectral analyses of the herb extract before and after synthesis, in order to elucidate the phytochemicals responsible for the reduction of Ag + ions and the capping of the AgNPs produced.