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Fabrication of Ultra-Fine Ag NPs on TiO₂ Thin Films by Alcohol-Assisted Photodeposition Process for Photocatalysis-Related Applications.

ABSTRACT: Noble metal/semiconductor nanocomposites have been synthesized using various methods, including precipitation and hydrothermal and electrochemical processes. Among these, the photodeposition method stands out for its simplicity, without the need for high temperatures, redox agents, or complex steps. This method facilitates the control over noble metal nanoparticle size by adjusting parameters such as metal precursor concentration, irradiation time, and power. However, understanding the interaction between solid and liquid interfaces, particularly the role of solution viscosity in the growth process, remains a challenge. This knowledge is crucial for precise control over nanoparticle size and distribution. Our study highlights the influence of viscosity, manipulated through different alcohols, on the formation of Ag nanostructures on TiO₂ thin films via photodeposition, offering insights into optimizing nanocomposite synthesis.

SUBMITTER: Veziroglu S

PROVIDER: S-EPMC10972172 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature

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Fabrication of Ultra-Fine Ag NPs on TiO<sub>2</sub> Thin Films by Alcohol-Assisted Photodeposition Process for Photocatalysis-Related Applications.

Veziroglu Salih S

Materials (Basel, Switzerland) 20240315 6

Noble metal/semiconductor nanocomposites have been synthesized using various methods, including precipitation and hydrothermal and electrochemical processes. Among these, the photodeposition method stands out for its simplicity, without the need for high temperatures, redox agents, or complex steps. This method facilitates the control over noble metal nanoparticle size by adjusting parameters such as metal precursor concentration, irradiation time, and power. However, understanding the interacti ...[more]

PMID: 38541508

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Project description:Titanium dioxide (TiO2) in the form of thin films has attracted enormous attention for photocatalysis. It combines the fundamental properties of TiO2 as a large bandgap semiconductor with the advantage of thin films, making it competitive with TiO2 powders for recycling and maintenance in photocatalytic applications. There are many aspects affecting the photocatalytic performance of thin film structures, such as the nanocrystalline size, surface morphology, and phase composition. However, the quantification of each influencing aspect needs to be better studied and correlated. Here, we prepared a series of TiO2 thin films using a sol-gel process and spin-coated on p-type, (100)-oriented silicon substrates with a native oxide layer. The as-deposited TiO2 thin films were then annealed at different temperatures from 400 °C to 800 °C for 3 h in an ambient atmosphere. This sample synthesis provided systemic parameter variation regarding the aspects mentioned above. To characterize thin films, several techniques were used. Spectroscopic ellipsometry (SE) was employed for the investigation of the film thickness and the optical properties. The results revealed that an increasing annealing temperature reduced the film thickness with an increase in the refractive index. Atomic force microscopy (AFM) was utilized to examine the surface morphology, revealing an increased surface roughness and grain sizes. X-ray diffractometry (XRD) and UV-Raman spectroscopy were used to study the phase composition and crystallite size. The annealing process initially led to the formation of pure anatase, followed by a transformation from anatase to rutile as the annealing temperature increased. An overall enhancement in crystallinity was also observed. The photocatalytic properties of the thin films were tested using the photocatalytic decomposition of acetone gas in a home-built solid (photocatalyst)-gas (reactant) reactor. The composition of the gas mixture in the reaction chamber was monitored using in situ Fourier transform infrared spectroscopy. Finally, all of the structural and spectroscopic characteristics of the TiO2 thin films were quantified and correlated with their photocatalytic properties using a correlation matrix. This provided a good overview of which film properties affect the photocatalytic efficiency the most.

Dataset Information

Fabrication of Ultra-Fine Ag NPs on TiO₂ Thin Films by Alcohol-Assisted Photodeposition Process for Photocatalysis-Related Applications.

Publications

Fabrication of Ultra-Fine Ag NPs on TiO<sub>2</sub> Thin Films by Alcohol-Assisted Photodeposition Process for Photocatalysis-Related Applications.

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Dataset Information

Fabrication of Ultra-Fine Ag NPs on TiO2 Thin Films by Alcohol-Assisted Photodeposition Process for Photocatalysis-Related Applications.

Publications

Fabrication of Ultra-Fine Ag NPs on TiO<sub>2</sub> Thin Films by Alcohol-Assisted Photodeposition Process for Photocatalysis-Related Applications.

Similar Datasets

OmicsDI is part of the ELIXIR infrastructure

Tweets

Fabrication of Ultra-Fine Ag NPs on TiO₂ Thin Films by Alcohol-Assisted Photodeposition Process for Photocatalysis-Related Applications.