Articles

The Potential of Daruju Leaf Extract (Acanthus Ilicifolius) as a Bioreductor in the Synthesis of Silver Nanoparticles and Antibacterial Activity Test

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Silver nanoparticles had been synthesized through the bioreduction process using daruju (Acanthus ilicifolius) leaf extract as a bioreductant. The variation of the formula used is a mixture of daruju leaf extract with a 0.01 M AgNO3 solution with volume ratios of 2:1, 1:1, 1:2, and 1:3. The research results show that UV-Visible spectrophotometry confirmed that a volume ratio of 1:1 is the optimum formula with an absorption value of 2.346 at the maximum wavelength 440 nm. Synthesis of silver nanoparticles with daruju leaf extract has a strong inhibition zone about 10.42 mm. Proving that the synthesis of silver nanoparticles with extract daruju leaf can be used as an antibacterial agent against E.coli bacteria.

Green Synthesis and Characterization of Silver Nanoparticles Derived from Ethanol Extract of Sappan Wood

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Silver nanoparticles had been synthesized through the reduction process using an ethanol extract of sappan wood (Caesalpinia sappan L.) as a bioreductor.  The variation of the formula used is a mixture of the ethanol extract of sappan wood with a 2 mM AgNO3 solution in a volume ratio of 1:1, 1:2, 1:3, and 1:4. The results showed that the UV-Visible spectrophotometry confirmed that the volume ratio of 1:1 was the optimum formula with an absorbance value of 1.243 at the maximum wavelength of 446 nm. Particle size analysis using Zetasizer Nano ZS revealed that the synthetized silver nanoparticles had a particle size of 618.1 nm. The hydroxyl group (OH) had a important role in the nanoparticle formation process, according to functional group characterization using FTIR. Due to silver nanoparticles tendency  to agglomerate, the SEM image of the silver nanoparticles showed a variety of sizes and forms.