Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) Porphyrin
This study utilized tetramethylammonium hydroxide (TMAH) as a substitute for traditional catalysts and successfully incorporated platinum octaethylporphyrin (PtOEP) into SiO<sub>2</sub> nanoparticles (PtOEP@SiO<sub>2</sub>) via the Stöber method. Methyl silicone resin was emp...
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MDPI AG
2025-06-01
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| Online Access: | https://www.mdpi.com/1424-8220/25/11/3559 |
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| author | Hang Lv Siyuan Cheng Song Hu Guohong Zhou |
| author_facet | Hang Lv Siyuan Cheng Song Hu Guohong Zhou |
| author_sort | Hang Lv |
| collection | DOAJ |
| description | This study utilized tetramethylammonium hydroxide (TMAH) as a substitute for traditional catalysts and successfully incorporated platinum octaethylporphyrin (PtOEP) into SiO<sub>2</sub> nanoparticles (PtOEP@SiO<sub>2</sub>) via the Stöber method. Methyl silicone resin was employed as the matrix material, and a drop-coating technique was applied to fabricate thin films of PtOEP@SiO<sub>2</sub> particles for dissolved oxygen (DO) sensing in seawater. By optimizing the concentrations of TMAH and PtOEP, a highly sensitive oxygen-sensing film with a quenching ratio (I<sub>0</sub>/I<sub>100</sub>) of 28 was ultimately developed, with a wide linear detection range (0~20 mg/L, R<sup>2</sup> = 0.994). Stability tests revealed no significant performance degradation during five oxygen–nitrogen cycle tests. After 30 days of immersion in East China Sea seawater, the quenching ratio decreased by only 6%, confirming its long-term stability and excellent resistance to ion interference. This research provides a novel strategy for developing highly reliable in situ marine DO sensors. |
| format | Article |
| id | doaj-art-9eba18c441414d7ba21b293bec614677 |
| institution | OA Journals |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | MDPI AG |
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| series | Sensors |
| spelling | doaj-art-9eba18c441414d7ba21b293bec6146772025-08-20T02:22:59ZengMDPI AGSensors1424-82202025-06-012511355910.3390/s25113559Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) PorphyrinHang Lv0Siyuan Cheng1Song Hu2Guohong Zhou3State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaState Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, ChinaThis study utilized tetramethylammonium hydroxide (TMAH) as a substitute for traditional catalysts and successfully incorporated platinum octaethylporphyrin (PtOEP) into SiO<sub>2</sub> nanoparticles (PtOEP@SiO<sub>2</sub>) via the Stöber method. Methyl silicone resin was employed as the matrix material, and a drop-coating technique was applied to fabricate thin films of PtOEP@SiO<sub>2</sub> particles for dissolved oxygen (DO) sensing in seawater. By optimizing the concentrations of TMAH and PtOEP, a highly sensitive oxygen-sensing film with a quenching ratio (I<sub>0</sub>/I<sub>100</sub>) of 28 was ultimately developed, with a wide linear detection range (0~20 mg/L, R<sup>2</sup> = 0.994). Stability tests revealed no significant performance degradation during five oxygen–nitrogen cycle tests. After 30 days of immersion in East China Sea seawater, the quenching ratio decreased by only 6%, confirming its long-term stability and excellent resistance to ion interference. This research provides a novel strategy for developing highly reliable in situ marine DO sensors.https://www.mdpi.com/1424-8220/25/11/3559dissolved oxygensensingsilica-encapsulated PtOEPfluorescence quenching |
| spellingShingle | Hang Lv Siyuan Cheng Song Hu Guohong Zhou Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) Porphyrin Sensors dissolved oxygen sensing silica-encapsulated PtOEP fluorescence quenching |
| title | Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) Porphyrin |
| title_full | Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) Porphyrin |
| title_fullStr | Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) Porphyrin |
| title_full_unstemmed | Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) Porphyrin |
| title_short | Highly Sensitive Dissolved Oxygen Sensor with High Stability in Seawater Based on Silica-Encapsulated Platinum(II) Porphyrin |
| title_sort | highly sensitive dissolved oxygen sensor with high stability in seawater based on silica encapsulated platinum ii porphyrin |
| topic | dissolved oxygen sensing silica-encapsulated PtOEP fluorescence quenching |
| url | https://www.mdpi.com/1424-8220/25/11/3559 |
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