<i>Aspergillus flavus</i>-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-<i>Candida</i>, Acaricides, and Photocatalytic Activities
<i>Aspergillus flavus</i> F5 was used to reduce AgNO<sub>3</sub> to form silver nanoparticles (Ag-NPs) that were monitored by a color change from colorless to yellowish-brown. The characterizations were achieved by UV-Vis spectroscopy, FT-IR, TEM, SEM-EDX, and XRD. Data showe...
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MDPI AG
2022-04-01
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| Online Access: | https://www.mdpi.com/2073-4344/12/5/462 |
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| author | Amr Fouda Mohamed A. Awad Zarraq E. AL-Faifi Mohammed E. Gad Areej A. Al-Khalaf Reham Yahya Mohammed F. Hamza |
| author_facet | Amr Fouda Mohamed A. Awad Zarraq E. AL-Faifi Mohammed E. Gad Areej A. Al-Khalaf Reham Yahya Mohammed F. Hamza |
| author_sort | Amr Fouda |
| collection | DOAJ |
| description | <i>Aspergillus flavus</i> F5 was used to reduce AgNO<sub>3</sub> to form silver nanoparticles (Ag-NPs) that were monitored by a color change from colorless to yellowish-brown. The characterizations were achieved by UV-Vis spectroscopy, FT-IR, TEM, SEM-EDX, and XRD. Data showed that there was a successful formation of crystalline, spherical shape Ag-NPs with a particle average size of 12.5 ± 5.1 nm. The FT-IR clarified the role of various functional groups in the reducing/capping process. EDX-SEM revealed that the main component of the as-formed sample was set to be mainly Ag with a weight percentage of 46.1%. The synthesized Ag-NPs exhibit antibacterial and anti-<i>Candida</i> activity against <i>Staphylococcus aureus</i>, <i>Bacillus subtilis</i>, <i>Pseudomonas aeruginosa</i>, <i>Escherichia coli</i>, <i>Candida albicans</i>, <i>C. glabrata</i>, <i>C. tropicalis</i>, and <i>C. parapsilosis</i>, with inhibition zones ranging between 9.3 ± 0.5 to 20.8 ± 0.3 nm based on concentrations used and MIC values between 6.25 to 25 ppm. The mortality percentages of <i>Tyrophagus putrescentiae</i> mite species due to the mixing of their diet with different Ag-NPs concentrations of 0.5, 1.0, and 1.5 mg were 55.7 ± 2.1, 73.3 ± 1.5, and 87.4 ± 1.6% respectively after 20 days post-treatment. The catalytic activity of Ag-NPs to degrade methylene blue (MB) was investigated in the presence and absence of light irradiation. Data showed that a high photocatalytic degradation of MB compared with dark conditions at various times and concentrations. At a concentration of 70 mg/30 mL after 200 min., the dye removal percentages were 86.4 ± 0.4% in the presence of light irradiation versus 66.5 ± 1.1% in dark conditions. |
| first_indexed | 2024-03-10T03:12:10Z |
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| institution | Directory Open Access Journal |
| issn | 2073-4344 |
| language | English |
| last_indexed | 2024-03-10T03:12:10Z |
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| spelling | doaj.art-fe8e2bd64856404c97b6b13aa81abe9a2023-11-23T10:25:13ZengMDPI AGCatalysts2073-43442022-04-0112546210.3390/catal12050462<i>Aspergillus flavus</i>-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-<i>Candida</i>, Acaricides, and Photocatalytic ActivitiesAmr Fouda0Mohamed A. Awad1Zarraq E. AL-Faifi2Mohammed E. Gad3Areej A. Al-Khalaf4Reham Yahya5Mohammed F. Hamza6Department of Botany and Microbiology, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, EgyptDepartment of Zoology and Entomology, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, EgyptCenter for Environmental Research and Studies, Jazan University, Jazan 42145, Saudi ArabiaDepartment of Zoology and Entomology, Faculty of Science, Al-Azhar University, Nasr City, Cairo 11884, EgyptBiology Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi ArabiaMedical Microbiology, College of Science and Health Professions, King Saud Bin Abdulaziz University for Health Sciences, Riyadh 11671, Saudi ArabiaSchool of Nuclear Science and Technology, University of South China, Hengyang 421001, China<i>Aspergillus flavus</i> F5 was used to reduce AgNO<sub>3</sub> to form silver nanoparticles (Ag-NPs) that were monitored by a color change from colorless to yellowish-brown. The characterizations were achieved by UV-Vis spectroscopy, FT-IR, TEM, SEM-EDX, and XRD. Data showed that there was a successful formation of crystalline, spherical shape Ag-NPs with a particle average size of 12.5 ± 5.1 nm. The FT-IR clarified the role of various functional groups in the reducing/capping process. EDX-SEM revealed that the main component of the as-formed sample was set to be mainly Ag with a weight percentage of 46.1%. The synthesized Ag-NPs exhibit antibacterial and anti-<i>Candida</i> activity against <i>Staphylococcus aureus</i>, <i>Bacillus subtilis</i>, <i>Pseudomonas aeruginosa</i>, <i>Escherichia coli</i>, <i>Candida albicans</i>, <i>C. glabrata</i>, <i>C. tropicalis</i>, and <i>C. parapsilosis</i>, with inhibition zones ranging between 9.3 ± 0.5 to 20.8 ± 0.3 nm based on concentrations used and MIC values between 6.25 to 25 ppm. The mortality percentages of <i>Tyrophagus putrescentiae</i> mite species due to the mixing of their diet with different Ag-NPs concentrations of 0.5, 1.0, and 1.5 mg were 55.7 ± 2.1, 73.3 ± 1.5, and 87.4 ± 1.6% respectively after 20 days post-treatment. The catalytic activity of Ag-NPs to degrade methylene blue (MB) was investigated in the presence and absence of light irradiation. Data showed that a high photocatalytic degradation of MB compared with dark conditions at various times and concentrations. At a concentration of 70 mg/30 mL after 200 min., the dye removal percentages were 86.4 ± 0.4% in the presence of light irradiation versus 66.5 ± 1.1% in dark conditions.https://www.mdpi.com/2073-4344/12/5/462green synthesismethylene bluephotocatalysts<i>Tyrophagus putrescentiae</i>antimicrobial |
| spellingShingle | Amr Fouda Mohamed A. Awad Zarraq E. AL-Faifi Mohammed E. Gad Areej A. Al-Khalaf Reham Yahya Mohammed F. Hamza <i>Aspergillus flavus</i>-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-<i>Candida</i>, Acaricides, and Photocatalytic Activities Catalysts green synthesis methylene blue photocatalysts <i>Tyrophagus putrescentiae</i> antimicrobial |
| title | <i>Aspergillus flavus</i>-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-<i>Candida</i>, Acaricides, and Photocatalytic Activities |
| title_full | <i>Aspergillus flavus</i>-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-<i>Candida</i>, Acaricides, and Photocatalytic Activities |
| title_fullStr | <i>Aspergillus flavus</i>-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-<i>Candida</i>, Acaricides, and Photocatalytic Activities |
| title_full_unstemmed | <i>Aspergillus flavus</i>-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-<i>Candida</i>, Acaricides, and Photocatalytic Activities |
| title_short | <i>Aspergillus flavus</i>-Mediated Green Synthesis of Silver Nanoparticles and Evaluation of Their Antibacterial, Anti-<i>Candida</i>, Acaricides, and Photocatalytic Activities |
| title_sort | i aspergillus flavus i mediated green synthesis of silver nanoparticles and evaluation of their antibacterial anti i candida i acaricides and photocatalytic activities |
| topic | green synthesis methylene blue photocatalysts <i>Tyrophagus putrescentiae</i> antimicrobial |
| url | https://www.mdpi.com/2073-4344/12/5/462 |
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