The role of photoluminescence induced by Yb3+/Yb2+ transformation in promoting the SPR effect in Pd/Ybn+/BiOBr photocatalyst system
Source abstract
Abstract
Abstract The surface plasmon resonance (SPR) effect induced by metal nanoparticles (NPs) can improve the visible-light response in photocatalysis. However, the optical shielding effect of NPs will scatter light, which reduces the utilization of light. With unique 4f electrons and multiple splitting of 4f orbits, lanthanide elements possess distinct luminescence property. Moreover, semiconductor can be excited by the role of up or down-conversion luminescence in rare earth. In this work, Yb with different contents were first doped in BiOBr via solvothermal method. Then, Pd NPs were deposited on Yb/BiOBr by photo-deposition. XRD, SEM, TEM, FT-IR, XPS, PL and Uv–vis-DRS were used to characterize the physical and optical structure of samples. The influence of Yb doping on the density of states (DOS) of BiOBr was analyzed by first principle calculation. The results show that the crystallinity and band-gap energy of BiOBr were promoted by Yb doping. Moreover, Yb doping promoted the exposure of active crystal face, which benefits the formation of Schottky junction after Pd deposition. The down-conversion luminescence of Yb can restrain the optical shielding effect and promote the SPR effect of Pd in photocatalysis.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Luminescence Properties of Advanced Materials · Gas Sensing Nanomaterials and Sensors
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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