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標題: Facile Synthesis of Silver Nanoparticles by Montmorillonite Electrochemical Method in the Presence of Sodium
作者: Huang, Rong-Hsin
Chao, Wen-Kai
Yu, Ruei-Sung
Huang, Rong-Tan
Hsueh, Kan-Lin
Shieu, Fuh-Sheng
摘要: Silver nanoparticles (AgNPs) were successfully synthesized via a rapid and convenient electrochemical method using sodium montmorillonite (MMT), a naturally occurring mineral, as both a stabilizer and a carrier. X-ray diffraction results showed that the AgNPs had face-centered cubic crystal structure. Inductively coupled plasma-atomic emission spectral analysis indicated that the AgNP yield increased with increasing the reduction potential. UV-vis absorption curves demonstrated that the AgNPs had optical absorbance at ca. 412 nm and showed a spectral blue-shift resulting from a decrease in the particle size. Transmission electron microscopy confirmed that after a centrifugation clarification process, the AgNPs formed in the aqueous solutions at reduction potentials of 5, 10, 15, and 20 V had average sizes of 4.2, 5.6, 15.3, and 20.5 nm, respectively. In contrast, in the as-prepared AgNP/MMT aqueous solutions, the AgNPs on the MMT surface had average sizes of 5.1, 8.0, 17.0, and 25.0 nm at reduction potentials of 5, 10, 15, and 20 V, respectively. Measurement of the inhibition area of antibacterial activity demonstrated that the AgNP/MMT nanocomposites had promising antibacterial applications.
ISSN: 0013-4651
Appears in Collections:材料科學與工程學系



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