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Halder, Dipankar
- Green Synthesis of Copper Nanoparticles and their Antibacterial Property
Abstract Views :378 |
PDF Views:7
Authors
Gargi Dinda
1,
Dipankar Halder
1,
Carlos Vazquez-Vazquez
2,
M. Arturo Lopez-Quintela
2,
Atanu Mitra
3
Affiliations
1 Department of Food Technology & Biochemical Engineering, Jadavpur University, Kolkata-700032, IN
2 University of Santiago de Compostela, Faculty of Chemistry, Department of Physical Chemistry, Avenida das Ciencias, s/n, 15782 Santiago de Compostela, ES
3 Department of Chemistry, Sree Chaitanya College, Habra, West Bengal, IN
1 Department of Food Technology & Biochemical Engineering, Jadavpur University, Kolkata-700032, IN
2 University of Santiago de Compostela, Faculty of Chemistry, Department of Physical Chemistry, Avenida das Ciencias, s/n, 15782 Santiago de Compostela, ES
3 Department of Chemistry, Sree Chaitanya College, Habra, West Bengal, IN
Source
Journal of Surface Science and Technology, Vol 31, No 1-2 (2015), Pagination: 117-122Abstract
We report the synthesis of copper nanoparticle using a completely green protocol. Aqueous copper sulphate solution was used as a precursor of copper nanoparticle whereas L-ascorbic acid and starch acted as reducing agent and stabilizer respectively. Formation of copper nanoparticle was confirmed by colour, UV-VIS spectroscopy and X-Ray Diffraction (XRD) results. The as-synthesized copper nanoparticles show characteristic plasmonic band at 590 nm. High-Resolution Electron Microscopy (HRTEM) shows almost spherical particles having average diameters of 5.7 ± 1.8 nm. As-synthesized copper nanoparticle exhibits antibacterial activity for both Gm-positive bacteria, Bacilus subtilis and Gm-negetive bacteria, Escherecia coli. Plate count and Minimum Inhibitory Concentration (MIC) studies show higher susceptibility of B. subtilis towards copper nanoparticleKeywords
Antibacterial Activity, Copper Nanoparticle, Green Synthesis
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Abstract Views :248 |
PDF Views:2
Authors
Affiliations
1 Department of Food Processing Technology, Central Institute of Technology, Kokrajhar, BTAD, Assam - 783370, IN
2 Department of Food Technology and Biochemical Engineering, Jadavpur University, Kolkata-700032, IN
3 Department of Chemistry, Sree Chaitanya College, Habra, IN
1 Department of Food Processing Technology, Central Institute of Technology, Kokrajhar, BTAD, Assam - 783370, IN
2 Department of Food Technology and Biochemical Engineering, Jadavpur University, Kolkata-700032, IN
3 Department of Chemistry, Sree Chaitanya College, Habra, IN
Source
Journal of Surface Science and Technology, Vol 32, No 3-4 (2016), Pagination: 115–120Abstract
This paper reports rapid and eco-friendly biosynthesis of silver nanoparticles using latex of two different plants Jatropha curcas (Jc) and Lannea grandis (Lg). Latex of these plants act as both reducing as well as capping agent. The surface plasmon resonance (SPR) band of as-synthesized silver nanocolloids (AgNC) appeared at 440 nm and 415 nm for the AgNC synthesized by latex of Jc and Lg, respectively. TEM images show that the latex of Lg produced smaller regular-shaped particles than those produced by latex of Jc. The influence of different synthesis parameters like concentration of latex, concentration of metal ion, time of reaction etc., on the morphology of the particles were also studied by monitoring UV-Vis spectra of the samples.Keywords
Green Synthesis, Latex Extract, Silver Nanoparticle, Surface Plasmon Resonance (SPR).References
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- Study of Adsorption of Malachite Green on Dried Aspergillus versicolor (MTCC280) Biomass
Abstract Views :271 |
PDF Views:8
Authors
Affiliations
1 Department of Food Technology & Bio-Chemical Engineering, Jadavpur University, Kolkata, IN
2 Department of Chemistry, Sree Chaitanya College, Habra, North 24-Parganas, West Bengal, IN
1 Department of Food Technology & Bio-Chemical Engineering, Jadavpur University, Kolkata, IN
2 Department of Chemistry, Sree Chaitanya College, Habra, North 24-Parganas, West Bengal, IN
Source
Journal of Surface Science and Technology, Vol 33, No 1-2 (2017), Pagination: 70–78Abstract
Dyes are extensively used in textile, tannery, food, paper and pulp, printing industries to color their products. About 10-15% of the annual global production (2,80,000 tons) of dyes are discharged as effluent mainly by textile and paint industries. The majority of the dyes are toxic and cause damage to aquatic life. In this study biosorption of Malachite Green (MG) onto the lyophilised Aspergillus versicolor Biomass (AVB) was investigated with variation in pH, temperature, contact time, biosorbent concentration and dye concentration. Characterization of the dye-biosorbent interaction was studied by scanning electron microscopy. It was observed from the present study that the biosorption of Malachite green was maximum at pH 5.0, temperature of 30°C, and adsorbent concentration of 2g/L. The rate of adsorption was found to be very fast at the initial phase and the equilibrium reached within 270 min following the pseudo-second order rate kinetics. The adsorption process followed Freundlich Isotherm model. The treated and untreated AVB was characterized for the investigation of possible dye-biosorbent interaction and surface morphology by Fourier Transform Infrared (FTIR) spectroscopy and Scanning Electron Microscopy (SEM) respectively. The results show that the present study may help designing a promising route towards bioremediation of the hazardous chemical MG.Keywords
Biosorption, Isotherm, Kinetics, Malachite Green, SEM.References
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