Reactive oxygen species generation in aqueous solutions containing GdVO4:Eu3+ nanoparticles and their complexes with methylene blue
| Autor: | Pavel Maksimchuk, Nataliya S. Kavok, I. A. Borovoy, Yuri Malyukin, K.O. Hubenko, T. N. Tkacheva, Svetlana L. Yefimova, Oleksander Opolonin, Vladimir K. Klochkov |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Radical scavenging Radical 02 engineering and technology Conjugated system 010402 general chemistry Photochemistry 01 natural sciences Catalysis chemistry.chemical_compound lcsh:TA401-492 General Materials Science Photosensitizer chemistry.chemical_classification Reactive oxygen species Aqueous solution Singlet oxygen 021001 nanoscience & nanotechnology Condensed Matter Physics 0104 chemical sciences Photocatalytic activity chemistry Nanoparticles lcsh:Materials of engineering and construction. Mechanics of materials 0210 nano-technology Methylene blue |
| Zdroj: | Nanoscale Research Letters, Vol 13, Iss 1, Pp 1-9 (2018) |
| ISSN: | 1556-276X 1931-7573 |
| Popis: | It this letter, we report the study of free radicals and reactive oxygen species (ROS) generation in water solutions containing gadolinium orthovanadate GdVO4:Eu3+ nanoparticles (VNPs) and their complexes with methylene blue (MB) photosensitizer. The catalytic activity was studied under UV-Vis and X-ray irradiation by three methods (conjugated dienes test, OH· radical, and singlet oxygen detection). It has been shown that the VNPs–MB complexes reveal high efficiency of ROS generation under UV-Vis irradiation associated with both high efficiency of OH· radicals generation by VNPs and singlet oxygen generation by MB due to nonradiative excitation energy transfer from VNPs to MB molecules. Contrary to that under X-ray irradiation, the strong OH . radicals scavenging by VNPs has been observed. |
| Databáze: | OpenAIRE |
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