研究目的
Investigating the enhancement of photocatalytic activity of anatase TiO2 hollow spheres by utilizing both sides for stabilizing Au nanoparticles under visible light.
研究成果
The hybrid structure of Au nanoparticles and anatase TiO2 hollow spheres, with Au NPs confined on both sides, significantly enhances photocatalytic activity under visible light due to improved light-harvesting capacity and intensified local electromagnetic fields across the TiO2 shell.
研究不足
The study focuses on the photocatalytic degradation of methylene blue and phenol under visible light, with potential limitations in applicability to other organic molecules or under different light conditions.
1：Experimental Design and Method Selection:
The study employed a sacrificial templating method and convex surface-induced confinement to stabilize Au nanoparticles on both sides of TiO2 hollow spheres.
2：Sample Selection and Data Sources:
Core-shell Au(SiO2 nanoparticles were synthesized, followed by coating with anatase TiO2 and removing the SiO2 core to render yolk-shell Au(TiO
3：Au NPs were then deposited on the yolk-shell Au(TiOList of Experimental Equipment and Materials:
Included HAuCl4?3H2O, sodium citrate, TTAB, tetraethyl orthosilicate, titanium tert-butoxide, and NaOH. Equipment included a Micromeritics Tristar 3000 analyser, Bruker D8 Focus diffractometer, FEI Tecnai G2 F20 TEM, JEM-2100F SEM, and SHIMADZU UV-2550 spectrophotometer.
4：Experimental Procedures and Operational Workflow:
Detailed steps included synthesis of core-shell Au(SiO2, yolk-shell Au(TiO2, and Au@Au(TiO2, followed by characterization and photocatalytic activity evaluation.
5：Data Analysis Methods:
Photocatalytic activity was evaluated by photodegradation of methylene blue and phenol under visible light, with data analyzed using pseudo-first-order kinetic rate plots.
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Bruker D8 Focus diffractometer
D8 Focus
Bruker
Recording XRD patterns of materials
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FEI Tecnai G2 F20
Tecnai G2 F20
FEI
Transmission electron microscopy imaging
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SHIMADZU UV-2550 spectrophotometer
UV-2550
SHIMADZU
Diffuse reflectance spectra (DRS) of materials
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Micromeritics Tristar 3000 analyser
Tristar 3000
Micromeritics
Determination of specific surface area and pore size distribution
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JEM-2100F
2100F
JEM
Scanning electron microscopy imaging
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300 W xenon lamp
LS-SXE300-CUV
Beijing Perfectlight Technology Co. Ltd.
Visible light source for photocatalytic activity evaluation
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