Abduvalov Alshyn, Zhumanova Kamila, Kaikanov Marat, Tikhonov Alexander
Department of Physics, School of Sciences and Humanities, Nazarbayev University, Astana 010000, Kazakhstan.
Department of Chemistry, School of Sciences and Humanities, Nazarbayev University, Astana 010000, Kazakhstan.
ACS Omega. 2024 Nov 15;9(47):46834-46840. doi: 10.1021/acsomega.4c05546. eCollection 2024 Nov 26.
The WO photoanode has great potential application for solar photoelectrochemical water oxidation due to suitable band edge positions with water oxidation potentials. However, it suffers from poor light absorbance in the visible region. Here, we use Eu-doped YO nanoparticles (NPs) in combination with plasmonic gold (Au) NPs to better utilize and adsorb photons from UV and visible regions of sunlight. We attached plasmonic Au NPs on WO to enhance the photocatalytic properties due to the plasmon resonance mechanism. Additional deposition of YO:Eu NPs on Au NPs/WO improved the photoactivity of the photoanode further. YO:Eu NPs' downconversion property, along with their light-scattering effect, converts ultraviolet-region photons into visible-region photons and enforces the plasmon resonance mechanism of Au NPs. Experimental results show the increase of absorbance, improvement of electron-hole separation, and enhancement in photocurrent generation of the resultant photoelectrode.
由于其能带边缘位置与水氧化电位相匹配，WO光阳极在太阳能光电化学水氧化方面具有巨大的潜在应用价值。然而，它在可见光区域的光吸收率较差。在此，我们将铕掺杂的YO纳米颗粒（NPs）与等离子体金（Au）NPs结合使用，以更好地利用和吸收太阳光紫外和可见光区域的光子。我们将等离子体Au NPs附着在WO上，由于等离子体共振机制，增强了光催化性能。在Au NPs/WO上额外沉积YO:Eu NPs进一步提高了光阳极的光活性。YO:Eu NPs的下转换特性及其光散射效应，将紫外区域的光子转换为可见光区域的光子，并增强了Au NPs的等离子体共振机制。实验结果表明，所得光电极的吸光度增加、电子 - 空穴分离得到改善以及光电流产生增强。
