Green synthesis and characterization of cadmium sulphide nanoparticles from Chlamydomonas reinhardtii and their application as photocatalysts
| Autor: | Gautam Pennathur, M. Divya Rao |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
biology Band gap Mechanical Engineering Analytical chemistry Chlamydomonas reinhardtii Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics biology.organism_classification Photochemistry 01 natural sciences 0104 chemical sciences Blueshift chemistry.chemical_compound chemistry Mechanics of Materials Quantum dot Photocatalysis General Materials Science Fourier transform infrared spectroscopy 0210 nano-technology Methylene blue |
| Zdroj: | Materials Research Bulletin. 85:64-73 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2016.08.049 |
| Popis: | This paper describes a facile, “green” method for the synthesis of cadmium sulphide (CdS) nanoparticles from Chlamydomonas reinhardtii. Morphological analysis by electron microscopy revealed the presence of spherical particles measuring approximately 5 nm. Structural analysis by powder X-ray diffraction and Fourier transform infrared spectroscopy confirmed the presence of cubic CdS nanoparticles that were capped with algal proteins. Optical analysis showed a significant blue shift in the optical band gap that could be ascribed to quantum confinement. The photocatalytic ability of these nanoparticles against methylene blue under UV light was studied & was found to degrade 90% of the dye within 90 min. Trapping experiments indicate that photogenerated holes, OH were the main reactive species responsible for dye degradation. This one-step strategy using algal cell free extract to produce CdS nanoparticles is an economical, environmentally friendly approach for the large-scale synthesis of CdS nanoparticles that can be used in photocatalysis. |
| Databáze: | OpenAIRE |
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