Reactive oxygen species generation in aqueous solutions containing GdVO4:Eu3+ nanoparticles and their complexes with methylene blue

Nanoscale Research Letters

Kateryna Hubenko¹  Nataliya Kavok¹  Svetlana Yefimova¹  Tatyana Tkacheva¹  Igor Borovoy¹  Pavel Maksimchuk¹  Oleksander Opolonin¹  Yuri Malyukin¹  Vladimir Klochkov¹ 

[1] Institute for Scintillation Materials National Academy of Sciences of Ukraine;

关键词: Reactive oxygen species;    Nanoparticles;    Photocatalytic activity;    Radical scavenging;   

DOI  :  10.1186/s11671-018-2514-5

来源: DOAJ

【 摘 要 】

Abstract 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.

【 授权许可】

Unknown