Effective Antibacterial/Photocatalytic Activity of ZnO Nanomaterials Synthesized under Low Temperature and Alkaline Conditions
The purpose of this study was to evaluate the surface properties of ZnO nanomaterials based on their ability to photodegrade methyl blue dye (MB) and to show their antibacterial properties against different types of Gram-positive bacteria (<i>Bacillus manliponensis</i>, <i>Micrococ...
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/24/4417 |
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| author | Sujeong Kim Hyerim Park Sadanand Pandey Daewon Jeong Chul-Tae Lee Jeong Yeon Do Sun-Min Park Misook Kang |
| author_facet | Sujeong Kim Hyerim Park Sadanand Pandey Daewon Jeong Chul-Tae Lee Jeong Yeon Do Sun-Min Park Misook Kang |
| author_sort | Sujeong Kim |
| collection | DOAJ |
| description | The purpose of this study was to evaluate the surface properties of ZnO nanomaterials based on their ability to photodegrade methyl blue dye (MB) and to show their antibacterial properties against different types of Gram-positive bacteria (<i>Bacillus manliponensis</i>, <i>Micrococcus luteus</i>, <i>Staphylococcus aureus)</i> and Gram-negative bacteria (<i>Escherichia coli)</i>. In this study, ZnO nanomaterials were synthesized rapidly and easily in the presence of 1–4 M NaOH at a low temperature of 40 °C within 4 h. It was found that the ZnO nanomaterials obtained from the 1.0 M (ZnO–1M) and 2.0 M (ZnO–2M) aqueous solutions of NaOH had spherical and needle-shaped forms, respectively. As the concentration of NaOH increased, needle thickness increased and the particles became rod-like. Although the ZnO nanomaterial shapes were different, the bandgap size remained almost unchanged. However, as the NaOH concentration increased, the energy position of the conduction band shifted upward. Photo current curves and photoluminescence intensities suggested that the recombination between photoexcited electrons and holes was low in the ZnO–4M materials prepared in 4.0 M NaOH solution; however, charge transfer was easy. ∙O<sub>2</sub><sup>−</sup> radicals were generated more than ∙OH radicals in ZnO–4M particles, showing stronger antibacterial activity against both Gram-positive and Gram-negative bacteria and stronger decomposition ability on MB dye. The results of this study suggest that on the ZnO nanomaterial surface, ∙O<sub>2</sub><sup>−</sup> radicals generated are more critical for antibacterial activity than particle shape. |
| first_indexed | 2024-03-09T16:01:42Z |
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| language | English |
| last_indexed | 2024-03-09T16:01:42Z |
| publishDate | 2022-12-01 |
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| series | Nanomaterials |
| spelling | doaj.art-d45654c5d3024b71925fb7693dc29c212023-11-24T17:04:00ZengMDPI AGNanomaterials2079-49912022-12-011224441710.3390/nano12244417Effective Antibacterial/Photocatalytic Activity of ZnO Nanomaterials Synthesized under Low Temperature and Alkaline ConditionsSujeong Kim0Hyerim Park1Sadanand Pandey2Daewon Jeong3Chul-Tae Lee4Jeong Yeon Do5Sun-Min Park6Misook Kang7Department of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan 38541, Republic of KoreaDepartment of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan 38541, Republic of KoreaDepartment of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan 38541, Republic of KoreaDepartment of Microbiology, Laboratory of Bone Metabolism and Control, Yeungnam University College of Medicine, Daegu 42415, Republic of KoreaIndustry-University Cooperation Foundation, Dongduk Women’s University, Seoul 02748, Republic of KoreaKorea Evaluation Institute of Industrial Technology (Keit), Cheomdan-Ro 8-Gil, Dong-Gu, Daegu 41069, Republic of KoreaKorea Institute of Ceramic Engineering and Technology (KICET), Jinju 52851, Republic of KoreaDepartment of Chemistry, College of Natural Sciences, Yeungnam University, Gyeongsan 38541, Republic of KoreaThe purpose of this study was to evaluate the surface properties of ZnO nanomaterials based on their ability to photodegrade methyl blue dye (MB) and to show their antibacterial properties against different types of Gram-positive bacteria (<i>Bacillus manliponensis</i>, <i>Micrococcus luteus</i>, <i>Staphylococcus aureus)</i> and Gram-negative bacteria (<i>Escherichia coli)</i>. In this study, ZnO nanomaterials were synthesized rapidly and easily in the presence of 1–4 M NaOH at a low temperature of 40 °C within 4 h. It was found that the ZnO nanomaterials obtained from the 1.0 M (ZnO–1M) and 2.0 M (ZnO–2M) aqueous solutions of NaOH had spherical and needle-shaped forms, respectively. As the concentration of NaOH increased, needle thickness increased and the particles became rod-like. Although the ZnO nanomaterial shapes were different, the bandgap size remained almost unchanged. However, as the NaOH concentration increased, the energy position of the conduction band shifted upward. Photo current curves and photoluminescence intensities suggested that the recombination between photoexcited electrons and holes was low in the ZnO–4M materials prepared in 4.0 M NaOH solution; however, charge transfer was easy. ∙O<sub>2</sub><sup>−</sup> radicals were generated more than ∙OH radicals in ZnO–4M particles, showing stronger antibacterial activity against both Gram-positive and Gram-negative bacteria and stronger decomposition ability on MB dye. The results of this study suggest that on the ZnO nanomaterial surface, ∙O<sub>2</sub><sup>−</sup> radicals generated are more critical for antibacterial activity than particle shape.https://www.mdpi.com/2079-4991/12/24/4417ZnO nanomaterialslow temperaturealkaline conditionantibacterialphotocatalytic activity |
| spellingShingle | Sujeong Kim Hyerim Park Sadanand Pandey Daewon Jeong Chul-Tae Lee Jeong Yeon Do Sun-Min Park Misook Kang Effective Antibacterial/Photocatalytic Activity of ZnO Nanomaterials Synthesized under Low Temperature and Alkaline Conditions Nanomaterials ZnO nanomaterials low temperature alkaline condition antibacterial photocatalytic activity |
| title | Effective Antibacterial/Photocatalytic Activity of ZnO Nanomaterials Synthesized under Low Temperature and Alkaline Conditions |
| title_full | Effective Antibacterial/Photocatalytic Activity of ZnO Nanomaterials Synthesized under Low Temperature and Alkaline Conditions |
| title_fullStr | Effective Antibacterial/Photocatalytic Activity of ZnO Nanomaterials Synthesized under Low Temperature and Alkaline Conditions |
| title_full_unstemmed | Effective Antibacterial/Photocatalytic Activity of ZnO Nanomaterials Synthesized under Low Temperature and Alkaline Conditions |
| title_short | Effective Antibacterial/Photocatalytic Activity of ZnO Nanomaterials Synthesized under Low Temperature and Alkaline Conditions |
| title_sort | effective antibacterial photocatalytic activity of zno nanomaterials synthesized under low temperature and alkaline conditions |
| topic | ZnO nanomaterials low temperature alkaline condition antibacterial photocatalytic activity |
| url | https://www.mdpi.com/2079-4991/12/24/4417 |
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