Effects of structure, morphology, and up-conversion on Nd-doped BiVO4 system with high photocatalytic activity
Source abstract
Abstract
Abstract Nd-doped BiVO 4 photocatalysts with high photocatalytic activities have been synthesized by the microwave hydrothermal method. The effects of Nd doping on structural transformation, morphology, chemical valence, optical properties, and photocatalytic activities of Nd-doped BiVO 4 photocatalysts were investigated systematically. It is found that Nd doping and pH of the reaction precursor can induce the stabilization of tetragonal zircon BiVO 4 , and Nd 3+ ions have been incorporated into the BiVO 4 lattice. The structure and morphology of BiVO 4 play a significant role in the photocatalytic activity. The UV–vis diffuse reflectance spectra of Nd-doped BiVO 4 present four absorption peaks at 532, 590, 690 and 750 nm due to the excitation of Nd 3+ species. The strong up-conversion fluorescence spectra of Nd-doped BiVO 4 suggest the existence of up-conversion process, and the value of k/BET could reflect the effect of up-conversion lively and directly in Nd-doped BiVO 4 system. The contribution of high photodegradation activities to Nd-doped BiVO 4 catalysts under simulated sun-light is mainly from UV-light region. The mechanism of up-conversion upon sun-light excitation is proposed in favor of the improved photocatalytic activities of Nd-doped BiVO 4 .
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · Gas Sensing Nanomaterials and Sensors · Pigment Synthesis and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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