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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Paul, Bappi Bhuyan, Bishal Purkayastha, Debraj Dhar Dhar, Siddhartha Sankar |
| Description | Country affiliation: India Author Affiliation: Paul B ( Department of Chemistry, National Institute of Technology Silchar, Silchar 788010, Assam, India.); Bhuyan B ( Department of Chemistry, National Institute of Technology Silchar, Silchar 788010, Assam, India.); Purkayastha DD ( Department of Chemistry, National Institute of Technology Silchar, Silchar 788010, Assam, India. Electronic address: debrajdp@yahoo.com.); Dhar SS ( Department of Chemistry, National Institute of Technology Silchar, Silchar 788010, Assam, India. Electronic address: ssd_iitg@hotmail.com.) |
| Abstract | The present study reports a green approach for synthesis of gold (Au) and silver (Ag) nanoparticles (NPs) using dried biomass of Parkia roxburghii leaf. The biomass of the leaf acts as both reductant as well as stabilizer. The as-synthesized nanoparticles were characterized by time-dependent UV-visible, Fourier transform infrared (FT-IR), powder X-ray diffraction (XRD), and transmission electron microscopy (TEM) analyses. The UV-visible spectra of synthesized Au and Ag NPs showed surface plasmon resonance (SPR) at 555 and 440 nm after 12h. Powder XRD studies revealed formation of face-centered cubic structure for both Au and Ag NPs with average crystallite size of 8.4 and 14.74 nm, respectively. The TEM image showed the Au NPs to be monodispersed, spherical in shape with sizes in the range of 5-25 nm. On the other hand, Ag NPs were polydispersed, quasi-spherical in shape with sizes in the range of 5-25 nm. Investigation of photocatalytic activities of Au and Ag NPs under solar light illumination reveals that both these particles have pronounced effect on degradation of dyes viz., methylene blue (MB) and rhodamine b (RhB). Antibacterial activity of the synthesized NPs was studied on Gram positive bacteria Staphylococcus aureus and Gram negative bacteria Escherichia coli. Both Au and Ag NPs showed slightly higher activity on S. aureus than on E. coli. |
| File Format | HTM / HTML |
| ISSN | 10111344 |
| Volume Number | 154 |
| e-ISSN | 18732682 |
| Journal | Journal of Photochemistry and Photobiology B: Biology |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2016-01-01 |
| Publisher Place | Switzerland |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Biology Anti-bacterial Agents Chemistry Fabaceae Gold Metal Nanoparticles Silver Pharmacology Biomass Catalysis Escherichia Coli Drug Effects Metabolism Light Ultrastructure Methylene Blue Particle Size Photolysis Radiation Effects Plant Leaves Rhodamines Spectroscopy, Fourier Transform Infrared Staphylococcus Aureus Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Radiology, Nuclear Medicine and Imaging Biophysics Radiological and Ultrasound Technology Radiation |
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