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Nanobiotechnology 2018
Page 44
Nano Research & Applications
ISSN: 2471-9838
E u r o S c i C o n C o n f e r e n c e o n
Nanotech & Nanobiotechnology
J u l y 1 2 - 1 3 , 2 0 1 8
P a r i s , F r a n c e
The intense interest in the study of nanoparticles arose by virtue
of their unique physiochemical properties viz. mechanical, optical,
electronic, magnetic, antimicrobial and catalytic. Among the metal
oxide nanoparticles, CaO although rarely studied, has enormous
use in the felds of catalysis, antimicrobial, detection, therapeutic
and microelectronics. The green chemistry route is a pollution free
synthetic method that employed the use of precursors, water and
aqueous plant extract. It offers an alternative to chemical synthesis
approach. In this work, we have synthesized CaO nanoparticles via
green chemistry, using aqueous extract of broccoli as the capping
and reducing agent and a combination of different calcium salts
(Ca(NO3 )2, CaSO4, CaCl 2. 2H2O). The Ca(OH)2 obtained were annealed
at 750 ºC to give CaO nanoparticles represented as C1, C2 and C3 from
nitrite, sulphate and chloride sources sequentially. The nanoparticles
were further investigated for their photocatalytic activities using
bromocresol green (BG) and bromophenol blue (BP) as organic dyes
and UV light as a radiation source. All the samples; C1, C2 and C3
exhibit signifcant degradation abilities against BG and BP. C2 and C3
revealed greater extent of photocatalytic degradation as they almost
completely decolourised the organic dyes after a 180 mins of exposure
to UV light. The degradation effciency was found to be 73, 75 and 78%
for C1, C2 and C3 respectively.
Phyto-mediated synthesis and photocatalytic activity of
nanoparticles using aqueous extract of broccoli
J Osuntokun and D C Onwudiwe
North-West University, South Africa
Biography
JejenijaOsuntokunobtainedhisPhD inInorganicchemistryfromUniversity
of Fort Hare, South Africa. He has wealth of experience in synthesis and
characterization of metal complexes and subsequent use as a precursor
for the synthesis of metal sulphide nanoparticles. He has worked on
the synthesis of nanocomposite using synthesized metal sulphide
nanoparticles as nano fillers. Presently, he is a Postdoctoral research
fellow at North-west University in South Africa and his research focus is on
the preparation of metal oxide nanoparticles via green chemistry. These
metal oxides are further used for photocatalytic degradation of dyes with
the ultimate application in environmental remediation especially in water
purification.
J Osuntokun et al., Nano Res Appl 2018, Volume 4
DOI: 10.21767/2471-9838-C2-012