Alshyn Abduvalov*, Kamila Zhumanova, Marat Kaikanov and Alexander Tikhonov,
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引用次数: 0
摘要
由于 WO3 光阳极具有与水氧化电位相适应的带边位置，因此在太阳能光电化学水氧化方面具有巨大的应用潜力。然而，它在可见光区域的光吸收能力较差。在这里，我们将掺杂 Eu3+ 的 Y2O3 纳米粒子（NPs）与等离子体金（Au）NPs 结合使用，以更好地利用和吸附来自紫外线和可见光区域的光子。我们在 WO3 上附着了等离子体 Au NPs，利用等离子体共振机制增强光催化性能。在 Au NPs/WO3 上额外沉积 Y2O3:Eu3+ NPs 进一步提高了光阳极的光活性。Y2O3:Eu3+ NPs 的下转换特性及其光散射效应将紫外区光子转换为可见区光子，并强化了 Au NPs 的质子共振机制。实验结果表明，由此产生的光电极的吸光度增加、电子-空穴分离度提高、产生的光电流增强。
Photoactivity Enhancement of WO3 Photoanodes Using the Combined Effect of Plasmonic Au and Photoluminescent Y2O3:Eu3+ Nanoparticles
The WO3 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 Eu3+-doped Y2O3 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 WO3 to enhance the photocatalytic properties due to the plasmon resonance mechanism. Additional deposition of Y2O3:Eu3+ NPs on Au NPs/WO3 improved the photoactivity of the photoanode further. Y2O3:Eu3+ 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.
ACS OmegaChemical Engineering-General Chemical Engineering
CiteScore
6.60
自引率
4.90%
发文量
3945
审稿时长
2.4 months
期刊介绍：
ACS Omega is an open-access global publication for scientific articles that describe new findings in chemistry and interfacing areas of science, without any perceived evaluation of immediate impact.
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