Green synthesis of multifunctional zinc oxide (ZnO) nanoparticles using Cassia fistula plant extract and their photodegradative,antioxidant and antibacterial activities |
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| Affiliation: | 1. Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572103, Karnataka, India;2. Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572103, Karnataka, India;3. Prof. C. N. R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572103, Karnataka, India;4. Vice Chancellor, Chattisgarh Swami Vivekanand Technical University, Bhilai, Chattisgarh, India;5. Academic Mentor and Honorary Professor of Eminence, Department of Mechanical Engineering, Siddaganga Institute of Technology, B. H. Road, Tumkur 572103, Karnataka, India;1. Nanoelectronics Laboratory, Department of Electrical Engineering, National Institute of Technology (NIT), Rourkela 769008, Odisha, India;2. ONERA, 31055 Toulouse, France;1. UNESCO-UNISA Africa Chair in Nanosciences-Nanotechnology, College of Graduate Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria, South Africa;2. Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure road, Somerset West 7129, PO Box 722, Somerset West, Western Cape, South Africa;3. Nelson Mandela African Institute for Science & Technology, Arusha, Tanzania;1. Jodhpur National University, Jodhpur 342001, India;2. SITM Rewari, Haryana 123401, India;3. Department of Science, East West Institute of Technology, Bangalore 560 091, India;4. Department of Mechanical Engineering, DSCE, Provost, Dayananda Sagar University, Bangalore 560078, India;5. Department of Physics, LBSGFGC, Bangalore 560 032, India;6. Prof. C.N.R. Rao Centre for Advanced Materials Research, Tumkur University, Tumkur 572 103, India;7. Department of Chemistry, Dayananda Sagar College of Engineering, Shavige Malleshwara Hills, Kumaraswamy Layout, Bangalore 560078, India;8. Dr. D. Premachandra Sagar Centre for Advanced Materials, DSCE, Bengaluru 560078, India;1. Department of Electronics, Tumkur University, Tumkur 572 103, India;2. Dayananda Sagar University, Shavige Malleshwara Hills, Kumaraswamy layout, Bangalore 560078, Karnataka, India;3. Department of Studies & Research in Chemistry, Tumkur University, Tumkur 572 103, India;4. Department of Physics, Lal Bahadur Shastry Government First Grade College, Bangalore 560 032, India;5. Prof. C.N.R. Rao Centre for Advanced Materials Research, Tumkur University, Tumkur 572 103, India;6. Department of Studies and Research in Environmental Science, Tumkur University, Tumkur 572 103, India;7. Department of Chemistry, Dayananda Sagar College of Engineering, Shavige Malleshwara Hills, Kumaraswamy layout, Bangalore 560078, Karnataka, India;8. Department of Science, East West Institute of Technology, Bangalore 560 091, India;9. Dr. P. Sadananda Maiya Center for Food Science Research, 4th Block, Jayanagara, Bangalore 560 011, India;1. Department of Physics, Annamalai University, Annamalai Nagar, 608002, India;2. Department of Engg. Physics (FEAT), Annamalai University, Annamalai Nagar, 608 002, India;3. Department of Botany, Annamalai University, Annamalai Nagar, 608002, India;1. Department of Studies and Research in Chemistry, Tumkur University, Tumkur 572103, Karnataka, India;2. Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572103, Karnataka, India;3. Chattisgarh Swami Vivekanand Technical University, Bhilai, Chattisgarh, India;4. Department of Mechanical Engineering, Siddaganga Institute of Technology, Tumkur, 572103, Karnataka, India |
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| Abstract: | The present study involves green synthesis of ZnO nanoparticles (Nps) using aqueous Cassia fistula plant extract as fuel by solution combustion synthesis. The ZnO Nps were characterized by Powder X- ray diffraction (PXRD), UV–visible studies and Transmission electron microscopy (TEM). The Nps were evaluated for photodegradative, antimicrobial and antioxidant activities. The extract was found to contain reducing components such as polyphenols (11%) and flavonoids (12.5%). The Nps were found to have a hexagonal wurtzite structure. UV–visible absorption of ZnO Nps showed absorption band at 370 nm which can be assigned to the intrinsic band-gap absorption of ZnO due to the electron transitions from the valence band to the conduction band. TEM image confirms the formation of nanoparticles and the average crystallite sizes were found to be ~5–15 nm. Methylene blue (MB) dye was effectively degraded under UV and Sun light illumination in the presence of ZnO Nps. Significant antioxidant activity was exhibited by Nps through scavenging of 1, 1-Diphenyl-2-picrylhydrazyl (DPPH) free radicals. Excellent bactericidal activity was shown by the Nps on Klebsiella aerogenes, Escherichia coli, Plasmodium desmolyticum and Staphylococcus aureus. Synthesis of multifunctional ZnO Nps using naturally occurring plant products has been advocated as a possible environment friendly alternative to chemical methods. |
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| Keywords: | Green synthesis Zinc oxide Solution combustion X-ray diffraction |
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