Journal of the American Chemical Society
Journal of the American Chemical Society
5 years ago

Tunable Photoluminescence across the Visible Spectrum and Photocatalytic Activity of Mixed-Valence Rhenium Oxide Nanoparticles

Tunable Photoluminescence across the Visible Spectrum and Photocatalytic Activity of Mixed-Valence Rhenium Oxide Nanoparticles
Miroslaw Dygas, Tomasz Mazur, Young Jae Kim, Young Min Lee, Minju Kim, Kwang S. Kim, Jeonghun Yun, Bartosz A. Grzybowski, Yong-Kwang Jeong, Seok Min Yoon, Oh-Hoon Kwon, Sun Hee Choi
Materials exhibiting excitation-wavelength-dependent photoluminescence, PL, are useful in a range of biomedical and optoelectronic applications. This paper describes a nanoparticulate material whose PL is tunable across the entire visible range and is achieved without adjusting particle size, any postsynthetic doping, or surface modification. A straightforward thermal decomposition of rhenium (VII) oxide precursor yields nanoparticles that comprise Re atoms at different oxidation states. Studies of time-resolved emission spectra and DFT calculations both indicate that tunable PL of such mixed-valence particles originates from the presence of multiple emissive states that become “active” at different excitation wavelengths. In addition, the nanoparticles exhibit photocatalytic activity that, under visible-light irradiation, is superior to that of TiO2 nanomaterials.

Publisher URL: http://dx.doi.org/10.1021/jacs.7b07494

DOI: 10.1021/jacs.7b07494

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