The bifunctional Lewis acid site improved reactive oxygen species production: a detailed study of surface acid site modulation of TiO2 using ethanol and Br−
| العنوان: | The bifunctional Lewis acid site improved reactive oxygen species production: a detailed study of surface acid site modulation of TiO2 using ethanol and Br− |
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| المؤلفون: | Yi Wang, Shi Junqing, Yujing Ou, Haiming Xu, Yi Zheng, Chun-Lei Li, Xingzhi Jin |
| المصدر: | Catalysis Science & Technology. 12:565-571 |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | chemistry.chemical_classification, education.field_of_study, Reactive oxygen species, Chemistry, Population, Photochemistry, Catalysis, chemistry.chemical_compound, Adsorption, Halogen, Photocatalysis, Lewis acids and bases, education, Bifunctional |
| الوصف: | Modulation of surface acid sites (SAS) can effectively enhance the efficiency of reactive oxygen species (ROS) production in recent. However, the role of SAS has been neglected for photo-reduction reactions. Here, we report a Lewis acid site (L-acid) rich TiO2 prepared by synergistic effect of ethanol and halogen ions. The formation of L-acid improves the adsorption and mobility of O2, which facilitates to be reduced into superoxide radical (·O2-). L-acid may lift the population of photogenerated electrons (e-), which is concluded from the presence of ·CH3 signal in DMPO-·O2- ESR of only L-acid rich TiO2. In addition, L-acid enhances the migration of photogenerated holes (h+) to the surface of catalyst, which induces a continuous photo-oxidation reaction of H2O or -OH. Therefore, L-acid simultaneously enhances the photo-redox ROS generation reaction, resulting in higher photocatalytic activity. This work illustrates a dual function of L-acid and provides a useful strategy for improving the photocarriers separation and surface reaction efficiency. |
| تدمد: | 2044-4761 2044-4753 |
| DOI: | 10.1039/d1cy01760h |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::fdfd7365c6595f51a6b0453a42c3102d https://doi.org/10.1039/d1cy01760h |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........fdfd7365c6595f51a6b0453a42c3102d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20444761 20444753 |
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| DOI: | 10.1039/d1cy01760h |