Near-infrared-activated NaYF4:Yb3+, Er3+/Au/CdS for H2 production via photoreforming of bio-ethanol: plasmonic Au as light nanoantenna, energy relay, electron sink and co-catalyst

作者：Feng, Wenhui; Zhang, Lulu; Zhang, Yan; Yang, Yu; Fang, Zhibin; Wang, Bo; Zhang, Shiying; Liu, Ping^*

来源：Journal of Materials Chemistry A, 2017, 5(21): 10311-10320.

DOI：10.1039/c7ta02402a

• SPECTRUM PHOTOCATALYTIC PROPERTIES
• UP-CONVERSION LUMINESCENCE
• DRIVEN PHOTOCATALYST
• HYDROGEN-PRODUCTION
• EMERGING APPLICATIONS
• SHELL NANOSTRUCTURES
• DOPED BIVO4
• SOLAR
• TIO2
• NANOCRYSTALS

A sandwich-structured NaYF4:Yb3+, Er3+/Au/CdS architecture, as an up-conversion-involved photocatalyst for H-2 production through photoreforming of renewable bio-ethanol, was constructed successfully. The Au nanoparticles embedded in the NaYF4:Yb3+, Er3+/CdS interface play a quadruplex role to improve the solar utilization efficiency. First, plasmonic Au works as a light nanoantenna to harvest more incident light. Second, plasmonic Au acts as an energy relay, in which Au SPR-induced Forster resonance energy transfer (FRET) and plasmonic resonance energy transfer (PRET) synergistically facilitate the energy transfer from NaYF4:Yb3+, Er3+ to Au to CdS. Third, Au acts as an electron sink to promote electron-hole separation. Lastly, Au serves as a co-catalyst to activate H-2 evolution from bio-ethanol. The multifunctional Au makes NaYF4:Yb3+, Er3+/Au/CdS exhibit enhanced NIR-driven photocatalytic bio-ethanol reforming activity. Moreover, NaYF4:Yb3+, Er3+/Au/CdS shows superior photoactivity under simulated sunlight. This unique fabrication has implications for the rational design of highly efficient solar-energy-harvesting devices.

• 出版日期2017-6-7
• 单位长沙学院; 福州大学