Advancing Polyphenol-Based Triboelectric Nanogenerators via pH-Modulated Rapid Synthesis of Tannic Acid–Metal Complexes
Triboelectric nanogenerators (TENGs) are ideal for meeting the global demand for sustainable energy in energy harvesting and wearable electronics. While biomaterials like polysaccharides are well studied in TENGs, the potential of polyphenols and the role of phenolic groups in contact electrificatio...
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2025-05-01
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| author | Zehao Fang Xuefei Guan Jingjing He |
| author_facet | Zehao Fang Xuefei Guan Jingjing He |
| author_sort | Zehao Fang |
| collection | DOAJ |
| description | Triboelectric nanogenerators (TENGs) are ideal for meeting the global demand for sustainable energy in energy harvesting and wearable electronics. While biomaterials like polysaccharides are well studied in TENGs, the potential of polyphenols and the role of phenolic groups in contact electrification remain underexplored. This study bridges the gap by using tannic acid (TA) to rapidly prepare TA-Fe<sup>3+</sup> complex-coated particle films in 1.2 min. Analysis reveals that phenolic hydroxyl groups are strong electron donors, with Fe<sup>3+</sup> enhancing electron affinity by restricting their mobility and lowering molecular orbital energy levels. Adjusting the pH to control complex states enables the regulation of triboelectric charging behavior between positive and negative. Investigations into film micromorphology and particle size further optimize performance, with the tris-complex exhibiting negative charging behavior achieving exceptional stability and a high charge density of 92.5 μC·m<sup>−2</sup>. Additionally, integrating biomaterials into bio-TENGs and exploring the film’s pH and ion sensitivity broaden its applications, demonstrating versatile properties. This study clarifies the triboelectric properties of phenolic groups and proposes methods to regulate charging behavior, offering novel insights for developing biomaterials in TENGs. |
| format | Article |
| id | doaj-art-b4c7da711db34474bc3e1e56c559f1f0 |
| institution | DOAJ |
| issn | 1996-1073 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
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| series | Energies |
| spelling | doaj-art-b4c7da711db34474bc3e1e56c559f1f02025-08-20T02:58:47ZengMDPI AGEnergies1996-10732025-05-01189234810.3390/en18092348Advancing Polyphenol-Based Triboelectric Nanogenerators via pH-Modulated Rapid Synthesis of Tannic Acid–Metal ComplexesZehao Fang0Xuefei Guan1Jingjing He2School of Reliability and Systems Engineering, Beihang University, Beijing 100191, ChinaGraduate School of China Academy of Engineering Physics, Beijing 100193, ChinaSchool of Reliability and Systems Engineering, Beihang University, Beijing 100191, ChinaTriboelectric nanogenerators (TENGs) are ideal for meeting the global demand for sustainable energy in energy harvesting and wearable electronics. While biomaterials like polysaccharides are well studied in TENGs, the potential of polyphenols and the role of phenolic groups in contact electrification remain underexplored. This study bridges the gap by using tannic acid (TA) to rapidly prepare TA-Fe<sup>3+</sup> complex-coated particle films in 1.2 min. Analysis reveals that phenolic hydroxyl groups are strong electron donors, with Fe<sup>3+</sup> enhancing electron affinity by restricting their mobility and lowering molecular orbital energy levels. Adjusting the pH to control complex states enables the regulation of triboelectric charging behavior between positive and negative. Investigations into film micromorphology and particle size further optimize performance, with the tris-complex exhibiting negative charging behavior achieving exceptional stability and a high charge density of 92.5 μC·m<sup>−2</sup>. Additionally, integrating biomaterials into bio-TENGs and exploring the film’s pH and ion sensitivity broaden its applications, demonstrating versatile properties. This study clarifies the triboelectric properties of phenolic groups and proposes methods to regulate charging behavior, offering novel insights for developing biomaterials in TENGs.https://www.mdpi.com/1996-1073/18/9/2348tannic acidmetal-coordinated complexestriboelectric nanogeneratortriboelectric charging behaviorgreen energy harvesting |
| spellingShingle | Zehao Fang Xuefei Guan Jingjing He Advancing Polyphenol-Based Triboelectric Nanogenerators via pH-Modulated Rapid Synthesis of Tannic Acid–Metal Complexes Energies tannic acid metal-coordinated complexes triboelectric nanogenerator triboelectric charging behavior green energy harvesting |
| title | Advancing Polyphenol-Based Triboelectric Nanogenerators via pH-Modulated Rapid Synthesis of Tannic Acid–Metal Complexes |
| title_full | Advancing Polyphenol-Based Triboelectric Nanogenerators via pH-Modulated Rapid Synthesis of Tannic Acid–Metal Complexes |
| title_fullStr | Advancing Polyphenol-Based Triboelectric Nanogenerators via pH-Modulated Rapid Synthesis of Tannic Acid–Metal Complexes |
| title_full_unstemmed | Advancing Polyphenol-Based Triboelectric Nanogenerators via pH-Modulated Rapid Synthesis of Tannic Acid–Metal Complexes |
| title_short | Advancing Polyphenol-Based Triboelectric Nanogenerators via pH-Modulated Rapid Synthesis of Tannic Acid–Metal Complexes |
| title_sort | advancing polyphenol based triboelectric nanogenerators via ph modulated rapid synthesis of tannic acid metal complexes |
| topic | tannic acid metal-coordinated complexes triboelectric nanogenerator triboelectric charging behavior green energy harvesting |
| url | https://www.mdpi.com/1996-1073/18/9/2348 |
| work_keys_str_mv | AT zehaofang advancingpolyphenolbasedtriboelectricnanogeneratorsviaphmodulatedrapidsynthesisoftannicacidmetalcomplexes AT xuefeiguan advancingpolyphenolbasedtriboelectricnanogeneratorsviaphmodulatedrapidsynthesisoftannicacidmetalcomplexes AT jingjinghe advancingpolyphenolbasedtriboelectricnanogeneratorsviaphmodulatedrapidsynthesisoftannicacidmetalcomplexes |