Malaysian
Journal of Analytical Sciences Vol 19 No 6 (2015): 1187 - 1193
GREEN
SYNTHESIS OF SILVER NANOPARTICLES USING RHIZHOME EXTRACT OF GALANGAL, Alpinia
galangal
(Sintesis Hijau Nanopartikel Perak Menggunakan
Ekstrak Rizom Lengkuas, Alpinia galanga)
Alyza A. Azmi1*
and Norhidayah M. Ahyat2
1School of Fundamental Sciences
2School of Marine and Environmental Science
Universiti
Malaysia Terengganu, 21030 Kuala Terengganu, Terengganu, Malaysia
*Corresponding author: alyza.azzura@umt.edu.my
Received: 9
December 2014; Accepted: 16 October 2015
Abstract
A simple method of synthesizing silver
nanoparticles (AgNps) using rhizome extract of galangal, Alpinia galangal was presented. Antioxidant contains in galangal
served as greener and stable reducing agents in this one-pot synthesis. The
antioxidant from galangal was extracted in water at ambient environment and
quantitative analysis of antioxidant content was carried out using Total
Phenolic Content (TPC) assay. Fourier-Transform Infrared (FTIR) spectroscopy
analysis confirmed the presence of ʋ(O-H), ʋ(C=C) and ʋ(C-O) peaks that
contributed from polyphenol groups stretching vibrations. The formation of
AgNps was tracked by ultraviolet-visible spectrophotometer through the presence
of absorption peak at 430 nm, while the morphology and crystallinity of AgNps
were determined by Scanning Electron Microscopy (SEM) and X-ray Diffraction
(XRD) analyses. The results from this study prove that antioxidants found in
galangal rhizome extract act as effective reducing agent in the synthesis of
AgNps.
Keywords: green
synthesis, silver nanoparticles, galangal, plant extract, total phenolic content
Abstrak
Kajian
ini membentangkan satu kaedah yang mudah dalam sintesis nanopartikel perak
menggunakan extrak rizom lengkuas, Alpinia
galangal. Kandungan antioksidan di dalam lengkuas bertindak sebagai agen
penurunan yang lebih hijau dan stabil bagi sintesis satu-pot. Antioksidan
daripada lengkuas diekstrak menggunakan air pada persekitaran ambien dan
analisis kuantitatif bagi kandungan antioksidan telah dijalankan mengguknakan
ujian jumlah kandungan fenolik. Analisis spektroskopi Fourier Inframerah
mengesahkan kehadiran puncak-puncak
ʋ(O-H), ʋ(C=C) dan ʋ(C-O) yang disumbangkan oleh getaran regangan
kumpulan polifenol. Pembentukan nanopartikel perak dikesan menggunakan spektrofotometer
ultralembayung-nampak menerusi kehadiran puncak serapan pada 430 nm, manakala
morfologi dan kristaliniti nanopartikel perak ditentukan oleh analisis imbasan
elektron mikroskopi dan X-ray pembelauan. Keputusan-keputusan daripada kajian
ini membuktikan antioksidan yang dijumpai di dalam ekstrak rizom lengkuas bertindak sebagai agen
penurunan yang efektif di dalam sintesis nanopartikel perak.
Kata kunci: sintesis hijau, nanopartikel
perak, lengkuas, ekstrak tumbuhan, jumlah kandungan fenolik
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