7th ISF

CHEM043 - Modulating Plasmonic Field Effects on Gold Nanoparticles Using Tunable Atomic Layer Deposited TiO2 Towards Dye Degradation Reaction

Due to the wide range of uses it provides, catalysis research has significantly increased in recent years. Only a few research, meanwhile, have looked at the hypothesized catalysts' catalytic processes. This demonstrates the requirement for the steady advancement of industrial catalysts capable of maximizing catalytic efficiency. It is difficult to use many of the commonly used catalytic components in real-world settings because they need a lot of energy from UV light to activate their catalytic capabilities, such as TiO₂. This work uses a model catalytic system to investigate the processes of a catalyst made of gold nanoparticles (AuNPs), and titanium dioxide (TiO₂). Despite the reduced rate of catalysis, this system is simple to modify and regulate for various coverages, which makes it much simpler to examine the catalytic processes. Lowering TiO₂'s activation energy to permit activation in the visible light spectrum is another goal of this research. This will be accomplished by creating AuNPs utilizing the simple-to-replicate Turkevich approach. The sample will then have a very thin coating of TiO₂ coated on top of it using the Atomic Layer Deposition (ALD) technique. These materials will be tested using the Methylene Blue (MB) dye degradation process to determine their catalytic activity, and the relationship between plasmonic oscillation and TiO₂ thickness. Lastly, these information is used to conclude the catalytic mechanism of the system. It can be concluded that the mechanism of the catalyst relies on the active site which is located at the surface of TiO₂ layer with the maximum range of plasmonic oscillation more than 20 nm

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