Issue 47, 2021

In situ SERS monitoring of photocatalysts by Au-decorated Fe3O4@TiO2 nanocomposites: novel perspectives and insights

Abstract

The design and preparation of multifunctional nanomaterials are very important for photocatalytic research. Herein, we successfully fabricated Au-decorated Fe3O4@TiO2 nanoparticles (NPs) that can be easily separated from solution using an external magnet. The synthesized Fe3O4@TiO2–Au NPs exhibit excellent photocatalytic and surface-enhanced Raman scattering (SERS) activities upon 532 nm laser excitation. The photolysis of methyl orange (MO) by the Fe3O4@TiO2–Au NPs was successfully monitored by in situ SERS. The Fe3O4@TiO2–Au NPs exhibit more efficient catalysis than the Fe3O4@TiO2 NPs. Most importantly, Au-decorated TiO2 exhibits surface plasmon resonance (SPR), which induces hot electron transfer for photocatalytic and SERS activities. Therefore, the proposed Fe3O4@TiO2–Au NPs can be widely used in environmental monitoring and pollutant degradation using an in situ SERS monitoring technique.

Graphical abstract: In situ SERS monitoring of photocatalysts by Au-decorated Fe3O4@TiO2 nanocomposites: novel perspectives and insights

Supplementary files

Article information

Article type
Paper
Submitted
10 Sept. 2021
Accepted
27 Okt. 2021
First published
02 Nov. 2021

CrystEngComm, 2021,23, 8443-8450

In situ SERS monitoring of photocatalysts by Au-decorated Fe3O4@TiO2 nanocomposites: novel perspectives and insights

S. Jin, E. Park, S. Guo, Y. Park, L. Chen and Y. M. Jung, CrystEngComm, 2021, 23, 8443 DOI: 10.1039/D1CE01224J

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