Unassisted photocatalytic H2O2 production under visible light by fluorinated polymer-TiO2 heterojunction
| Autor: | Sang Myeon Lee, Yongjoon Cho, Ji-Wook Jang, Sung O Park, Hyeonjin Cho, Byongkyu Lee, Sang Kyu Kwak, Changduk Yang, Eun Min Go, Pankaj Sharma, Yerin Hong, Myohwa Ko |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Materials science General Chemical Engineering Visible light irradiation chemistry.chemical_element Heterojunction 02 engineering and technology General Chemistry Polymer 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Decomposition Fluorinated polymer Industrial and Manufacturing Engineering 0104 chemical sciences chemistry Fluorine Photocatalysis Environmental Chemistry 0210 nano-technology Visible spectrum |
| Zdroj: | Chemical Engineering Journal. 418:129346 |
| ISSN: | 1385-8947 |
| DOI: | 10.1016/j.cej.2021.129346 |
| Popis: | Photocatalytic H2O2 production is one of the most promising methods because it is a safe and sustainable technique. However, the inactiveness of inorganic photocatalysts (TiO2) under visible light irradiation and severe photodecomposition of H2O2 on their surfaces result in low performance for solar H2O2 production. Here, we report for the first time, a hydrophobic organic/inorganic (polymer/TiO2) heterojunction photocatalyst, which not only can utilize visible light, but also suppress H2O2 decomposition. In the absence of a hole scavenger, the photogenerated H2O2 concentration of the poly(9,9-dioctylfluorene-alt-benzothiadiazole) (PFBT)/TiO2 heterojunction photocatalyst (67 µM) was >70 times higher than that of pristine PFBT polymer. Further, improvement of polymer hydrophobicity by fluorine substitution results in enhanced photogenerated H2O2 concentration (110.4 µM) on (Poly(9,9-dioctyl fluorine-alt-difluorobenzothiadiazole) (PF2FBT)/TiO2). The atomistic simulation studies substantiate that the low adsorption energy of H2O2 on the heterojunction and the surface shielding of TiO2 induced by the hydrophobicity of the fluorinated polymers significantly improve H2O2 production. |
| Databáze: | OpenAIRE |
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