Stability and Photothermal Properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O Magnetic Nanofluids
Solar collectors are more efficient and commercial devices for collecting solar energy, compared to other solar energy utilizations. To improve the efficiency of solar collectors, it is important to prepare a liquid heat-collecting medium, which is stable and has high photothermal properties. Theref...
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| Format: | Article |
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MDPI AG
2023-06-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/13/1962 |
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| author | Chengya Zhang Lei Gao Xiaofeng Zhou Xiaohu Wu |
| author_facet | Chengya Zhang Lei Gao Xiaofeng Zhou Xiaohu Wu |
| author_sort | Chengya Zhang |
| collection | DOAJ |
| description | Solar collectors are more efficient and commercial devices for collecting solar energy, compared to other solar energy utilizations. To improve the efficiency of solar collectors, it is important to prepare a liquid heat-collecting medium, which is stable and has high photothermal properties. Therefore, in this work, we develop a droplet–droplet mixing technique to prepare Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O magnetic nanofluid. The results show that magnetic nanofluids prepared using the droplet–droplet mixing technique have more stable performance and a better encapsulation of dispersants than those prepared via traditional liquid–liquid mixing. Then, the thermal conductivity and photothermal properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O magnetic nanofluids are investigated experimentally and theoretically. The thermal conductivity and temperature of the magnetic nanofluid with Fe<sub>3</sub>O<sub>4</sub> nanoparticles of a 1.0% volume fraction can reach the maximum value of 0.95 W/m∙K and 73.9 °C when the magnetic field strength is equal to the saturation magnetic field of 800 Gs. These findings provide insights into the potential applications of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O magnetic nanofluids in direct absorption solar collectors, heat exchangers, automobile radiators, etc. |
| first_indexed | 2024-03-11T01:33:07Z |
| format | Article |
| id | doaj.art-3f603b29d0d74d0aac809a8f5772aa5b |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T01:33:07Z |
| publishDate | 2023-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-3f603b29d0d74d0aac809a8f5772aa5b2023-11-18T17:11:57ZengMDPI AGNanomaterials2079-49912023-06-011313196210.3390/nano13131962Stability and Photothermal Properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O Magnetic NanofluidsChengya Zhang0Lei Gao1Xiaofeng Zhou2Xiaohu Wu3School of Physical Science and Technology & Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, ChinaSchool of Physical Science and Technology & Jiangsu Key Laboratory of Thin Films, Soochow University, Suzhou 215006, ChinaCollege of Science, Hohai University, Nanjing 210024, ChinaShandong Institute of Advanced Technology, Jinan 250100, ChinaSolar collectors are more efficient and commercial devices for collecting solar energy, compared to other solar energy utilizations. To improve the efficiency of solar collectors, it is important to prepare a liquid heat-collecting medium, which is stable and has high photothermal properties. Therefore, in this work, we develop a droplet–droplet mixing technique to prepare Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O magnetic nanofluid. The results show that magnetic nanofluids prepared using the droplet–droplet mixing technique have more stable performance and a better encapsulation of dispersants than those prepared via traditional liquid–liquid mixing. Then, the thermal conductivity and photothermal properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O magnetic nanofluids are investigated experimentally and theoretically. The thermal conductivity and temperature of the magnetic nanofluid with Fe<sub>3</sub>O<sub>4</sub> nanoparticles of a 1.0% volume fraction can reach the maximum value of 0.95 W/m∙K and 73.9 °C when the magnetic field strength is equal to the saturation magnetic field of 800 Gs. These findings provide insights into the potential applications of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O magnetic nanofluids in direct absorption solar collectors, heat exchangers, automobile radiators, etc.https://www.mdpi.com/2079-4991/13/13/1962magnetic nanofluidsdroplet–droplet mixing techniquephotothermal conversion efficiency |
| spellingShingle | Chengya Zhang Lei Gao Xiaofeng Zhou Xiaohu Wu Stability and Photothermal Properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O Magnetic Nanofluids Nanomaterials magnetic nanofluids droplet–droplet mixing technique photothermal conversion efficiency |
| title | Stability and Photothermal Properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O Magnetic Nanofluids |
| title_full | Stability and Photothermal Properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O Magnetic Nanofluids |
| title_fullStr | Stability and Photothermal Properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O Magnetic Nanofluids |
| title_full_unstemmed | Stability and Photothermal Properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O Magnetic Nanofluids |
| title_short | Stability and Photothermal Properties of Fe<sub>3</sub>O<sub>4</sub>-H<sub>2</sub>O Magnetic Nanofluids |
| title_sort | stability and photothermal properties of fe sub 3 sub o sub 4 sub h sub 2 sub o magnetic nanofluids |
| topic | magnetic nanofluids droplet–droplet mixing technique photothermal conversion efficiency |
| url | https://www.mdpi.com/2079-4991/13/13/1962 |
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