Green Synthesis and Characterization of Silver Nanoparticles by Using Aloe Vera Leaf Extract to Study the Effects of Synthesis Parameters

Abstract:

In this research silver nanoparticles were synthesized by reducing silver nitrate solution using aloe vera leaf extract as reducing agent. The synthesized nanoparticles had been characterized and the effects of different parameters of synthesis had been evaluated. Silver nanoparticles began to form just after reaction and the whole reduction reaction was completed within 3 hours. The color changed from transparent to dark brown of the aqueous salt solution. Later the nanoparticles were separated out from the mixture by ultra-centrifugation. Here the effects of water bath temperature, the effects of heating time at that certain temperature and the effects of changing concentration of silver nitrate on the size of the synthesized nanoparticles was studied. The particle size and morphology of the synthesized silver nanoparticles were identified by SEM analysis. It was found to be 12-200 nm in different parameters (12-25 nm at the best condition) and spherical in shape. It was also found that the size of silver nanoparticles increased with increasing water bath temperature, increasing heating time and increasing silver nitrate concentration. Energy dispersive X-ray spectroscopy was used to confirm that the nanoparticle suspension contains nothing but metallic silver. It was found that 70% of elemental silver nanoparticles were present.

• Periodical: Applied Mechanics and Materials (Volume 860)
• Pages: 179-184
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.860.179
• Online since: December 2016
• Authors: Asif Rahman*, A.K.M. Bazlur Rashid, Md Abdul Aziz Antor, Md Ashif Anwar, Roisul Hasan Galib
• Keywords: Aloe Vera, Green Synthesis, Nanoparticles, Silver

References

[1] M. Catauro, M. G. Raucci, F. De Gaetano & A. Marotta, (2004). Antibacterial and bioactive silver-containing Na2O· CaO· 2SiO2 glass prepared by sol–gel method. Journal of Materials Science: Materials in Medicine, 15(7), 831-837.

DOI: 10.1023/b:jmsm.0000032825.51052.00

[2] Cao, G.Z. Nanostructures & Nanomaterials. London: Imperial College Press, (2004).

[3] A. R. Shahverdi, S. Minaeian, H. R. Shahverdi, H. Jamalifar, & A. A. Nohi, (2007). Rapid synthesis of silver nanoparticles using culture supernatants of Enterobacteria: a novel biological approach. Process Biochemistry, 42(5), 919-923.

DOI: 10.1016/j.procbio.2007.02.005

[4] A. Ahmad, P. Mukherjee, S. Senapati, D. Mandal, M. I. Khan, R. Kumar, & M. Sastry, (2003). Extracellular biosynthesis of silver nanoparticles using the fungus Fusarium oxysporum. Colloids and surfaces B: Biointerfaces, 28(4), 313-318.

DOI: 10.1016/s0927-7765(02)00174-1

[5] P. Mukherjee, A. Ahmad, D. Mandal, S. Senapati, S. R. Sainkar, M. I. Khan, et al. (2001).

[6] I. Sondi, & B. Salopek-Sondi, (2004). Silver nanoparticles as antimicrobial agent: a case study on E. coli as a model for Gram-negative bacteria. Journal of colloid and interface science, 275(1), 177-182.

DOI: 10.1016/j.jcis.2004.02.012

[7] V. K. Sharma, R. A. Yngard & Y. Lin, (2009). Silver nanoparticles: green synthesis and their antimicrobial activities. Advances in colloid and interface science, 145(1), 83-96.

DOI: 10.1016/j.cis.2008.09.002

[8] S. S. Shankar, A. Rai, A. Ahmad, M. Sastry, (2004). Rapid synthesis of Au, Ag, and bimetallic Au core–Ag shell nanoparticles using Neem (Azadirachta indica) leaf broth. Journal of colloid and interface science, 275(2), 496-502.

DOI: 10.1016/j.jcis.2004.03.003

[9] P. C. Nagajyothi, & K. D. Lee, (2011). Synthesis of plant-mediated silver nanoparticles using Dioscorea batatas rhizome extract and evaluation of their antimicrobial activities. Journal of nanomaterials, 2011, 49.

DOI: 10.1155/2011/573429