Green synthesis of Ag nanoparticles using Tamarind fruit extract for the antibacterial studies

N Jayaprakash; J Judith Vijaya; K Kaviyarasu; K Kombaiah; L John Kennedy; R Jothi Ramalingam; Murugan A Munusamy; Hamad A Al-Lohedan

doi:10.1016/j.jphotobiol.2017.03.013

Green synthesis of Ag nanoparticles using Tamarind fruit extract for the antibacterial studies

J Photochem Photobiol B. 2017 Apr:169:178-185. doi: 10.1016/j.jphotobiol.2017.03.013. Epub 2017 Mar 20.

Authors

N Jayaprakash¹, J Judith Vijaya², K Kaviyarasu³, K Kombaiah⁴, L John Kennedy⁵, R Jothi Ramalingam⁶, Murugan A Munusamy⁷, Hamad A Al-Lohedan⁶

Affiliations

¹ Catalysis and Nanomaterials Research Laboratory, Department of Chemistry, Loyola College, Chennai 600 034, India; Department of Chemistry, SRM Valliammai Engineering College, Chennai 603 203, India.
² Catalysis and Nanomaterials Research Laboratory, Department of Chemistry, Loyola College, Chennai 600 034, India. Electronic address: [email protected].
³ UNESCO-UNISA Africa Chair in Nanosciences/Nanotechnology Laboratories, College of Graduate Studies, University of South Africa (UNISA), Muckleneuk Ridge, P O Box 392, Pretoria, South Africa; Nanosciences African network (NANOAFNET), Materials Research Group (MRG), iThemba LABS-National Research Foundation (NRF), 1 Old Faure Road, 7129, P O Box 722, Somerset West, Western Cape Province, South Africa.
⁴ Catalysis and Nanomaterials Research Laboratory, Department of Chemistry, Loyola College, Chennai 600 034, India.
⁵ Materials Division, School of Advanced Sciences, VIT University, Chennai Campus, Chennai 600 048, India.
⁶ Chemistry Department, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.
⁷ Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia.

PMID: 28347958
DOI: 10.1016/j.jphotobiol.2017.03.013

Abstract

In the present study, first time we report the microwave-assisted green synthesis of silver nanoparticles (AgNPs) using Tamarindus indica natural fruit extract. The plant extract plays a dual role of reducing and capping agent for the synthesis of AgNPs. The formation of spherical shape AgNPs is confirmed by XRD, HR-SEM, and HR-TEM. The presence of face-centered cubic (FCC) silver is confirmed by XRD studies and the average crystallite size of AgNPs is calculated to be around 6-8nm. The average particle diameter is found to be around 10nm, which is identified from HR-TEM images. The purity of AgNPs is confirmed by EDX analysis. The presence of sigmoid curve in UV-Visible absorption spectra suggests that the reaction has complicated kinetic features. To investigate the functional groups of the extract and their involvement in the reduction of AgNO₃ to form AgNPs, FT-IR studies are carried out. The redox peaks are observed in cyclic voltammetry in the potential range of -1.2 to +1.2V, due to the redox active components of the T. indica fruit extract. In photoluminescence spectroscopy, the excited and emission peaks were obtained at 432nm and 487nm, respectively. The as-prepared AgNPs showed good results towards antibacterial activities. Hence, the present approach is a facile, cost- effective, reproducible, eco-friendly, and green method.

Keywords: Antibacterial activity; Electron microscopy; Green synthesis; Silver nanoparticles; UV–Visible spectroscopy.

MeSH terms

Anti-Bacterial Agents / chemistry*
Anti-Bacterial Agents / pharmacology
Fruit / chemistry*
Green Chemistry Technology / methods
Metal Nanoparticles / chemistry*
Plant Extracts / chemistry
Plant Extracts / pharmacology
Silver
Tamarindus / chemistry*

Substances

Anti-Bacterial Agents
Plant Extracts
Silver