Self-Driven Reactive Oxygen Species Generation via Interfacial Oxygen Vacancies on Carbon-Coated TiO2–x with Versatile Applications
| Autor: | Lyu Pin, Jian Zhu, Linlin Zhang, Xiaoyan Liu, Chongchong Han, Lei Qiang, Bingbao Mei, Zhenfeng Bian, Hexing Li, Jiehong He |
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| Rok vydání: | 2020 |
| Předmět: |
chemistry.chemical_classification
Reactive oxygen species Materials science Singlet oxygen chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Redox Oxygen 0104 chemical sciences Catalysis Metal chemistry.chemical_compound chemistry visual_art visual_art.visual_art_medium General Materials Science Organic synthesis 0210 nano-technology Carbon |
| Zdroj: | ACS Applied Materials & Interfaces. 13:2033-2043 |
| ISSN: | 1944-8252 1944-8244 |
| Popis: | The effective activation and utilization of O2 have always been the focus of scientists because of its wide applications in catalysis, organic synthesis, life and medical science. Here, a novel method for activating O2 spontaneously via interfacial oxygen vacancies on carbon-coated TiO2-x to generate reactive oxygen species (ROS) with versatile applications is reported. The interfacial oxygen vacancies can be stabilized by the carbon layer and hold its intrinsic properties for spontaneous oxygen activation without light irradiation, while common surface oxygen vacancies on TiO2-x are always consumed by the capture of H2O to form the surface hydroxyls. Thus, O2 absorbed at the interface of carbon and TiO2-x can be directly activated into singlet oxygen (1O2) or superoxide radicals (·O2-), confirmed both experimentally and theoretically. These reactive oxygen species exhibit excellent performance in oxidation reactions and inhibition of MCF-7 cancer cells, providing new insight into the effective utilization of O2 via oxygen vacancies on metal oxides. |
| Databáze: | OpenAIRE |
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