Synthesis of Nickel-Doped TiO<sub>2</sub> Thin Films and Their Structural and Optical Properties at Different Annealing Temperatures

Hojabri, Alireza; Adavi, M.; Hajakbari, Fatemeh

doi:10.12693/aphyspola.131.386

Cited by 4 publications

(2 citation statements)

References 14 publications

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“…Considering the heating temperature adopted for loading the Ni precursor, which is 300 °C, it is not impossible for Ni doping to take place at the TiO 2 surface, as was also observed in the earlier report. 34 The suggested doping scenario appears in agreement with the Raman spectroscopy data shown in Fig. 2B.…”

Section: Resultssupporting

confidence: 86%

Critical Role of the NiO–Ni(OH)₂ Species Loaded Onto TiO₂ Photocatalyst in the Enhancement of H₂ Evolution Activity

Sudrajat¹,

Susanti²

2023

J. Electrochem. Soc.

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One of the bottlenecks in photocatalysis is to obtain reasonably cheap co-catalysts beneficially contributing to efficient photophysical and photochemical processess. Herein, we prepare a co-catalyst system consisting of Ni species embedded in anatase TiO2. We focus on clarifying its role in regulating electron behavior, and hence, photocatalytic activity. Based on the transmission electron microscopy, X-ray absorption near-edge structure, and X-ray absorption fine structure, the surface-loaded Ni species are found to exist as crystalline NiO, together with a small fraction of amorphous Ni(OH)2. Using a combination of transient microwave conductivity and static infrared absorption spectroscopy, we show that electron transfer to the Ni species instead of electron trapping by structural defects, such as oxygen vacancies or reduced titanium cations, is key mechanism responsible for the prolonged lifetime of photoexcited electrons. The prolonged electron lifetime due to an efficient electron extractionby the Ni species are behind the increased H2 evolution activity. We demonstrate that the NiO-Ni(OH)2 co-catalyst system, which works as a H2 evolution site, is auspicious to make photoexcited electrons abundantly available on the surface by localizing them, and thus, readily accessible for the desired surface reactions.

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Section: Resultssupporting

confidence: 86%

Critical Role of the NiO–Ni(OH)₂ Species Loaded Onto TiO₂ Photocatalyst in the Enhancement of H₂ Evolution Activity

Sudrajat¹,

Susanti²

2023

J. Electrochem. Soc.

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“…It is well known that the size, structure and morphology of the films are the essential parameters for those applications [17][18][19][20][21][22]. The physical properties of the metal oxide thin films could be modified by adding suitable doping materials like Li, Cu, Au and Ag [1,14,23]. Sta et al [14] investigated the hydrogen sensors prepared using nickel oxide (NiO) and lithium-doped nickel oxide (NiO:Li) thin films.…”

Section: Introductionmentioning

confidence: 99%

Effect of silver thickness on structural, optical and morphological properties of nanocrystalline Ag/NiO thin films

2018

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Silver (Ag) nanolayers were deposited on nickel oxide (NiO) thin films by DC magnetron sputtering. The thickness of Ag layers was in range of 20-80 nm by variation of deposition time between 10 and 40 s. X-ray diffraction results showed that the crystalline properties of the Ag/NiO films improved by increasing the Ag film thickness. Also, atomic force microscopy and field emission scanning electron microscopy images demonstrated that the surface morphology of the films was highly affected by film thickness. The film thickness and the size of particles change by elevating the Ag deposition times. The composition of films was determined by Rutherford back scattering spectroscopy. The transmission of light was gradually reduced by augmentation of Ag films thickness. Furthermore; the optical band gap of the films was also calculated from the transmittance spectra.

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Structure and antibacterial properties of Ag and N doped titanium dioxide coatings containing Ti2.85O4N phase, prepared by magnetron sputtering and annealing

Dziedzic

Bochnowski

Adamiak

et al. 2020

Surface and Coatings Technology

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Synthesis of Nickel-Doped TiO₂ Thin Films and Their Structural and Optical Properties at Different Annealing Temperatures

Cited by 4 publications

References 14 publications

Critical Role of the NiO–Ni(OH)₂ Species Loaded Onto TiO₂ Photocatalyst in the Enhancement of H₂ Evolution Activity

Critical Role of the NiO–Ni(OH)₂ Species Loaded Onto TiO₂ Photocatalyst in the Enhancement of H₂ Evolution Activity

Effect of silver thickness on structural, optical and morphological properties of nanocrystalline Ag/NiO thin films

Structure and antibacterial properties of Ag and N doped titanium dioxide coatings containing Ti2.85O4N phase, prepared by magnetron sputtering and annealing

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Synthesis of Nickel-Doped TiO2 Thin Films and Their Structural and Optical Properties at Different Annealing Temperatures

Cited by 4 publications

References 14 publications

Critical Role of the NiO–Ni(OH)2 Species Loaded Onto TiO2 Photocatalyst in the Enhancement of H2 Evolution Activity

Critical Role of the NiO–Ni(OH)2 Species Loaded Onto TiO2 Photocatalyst in the Enhancement of H2 Evolution Activity

Effect of silver thickness on structural, optical and morphological properties of nanocrystalline Ag/NiO thin films

Structure and antibacterial properties of Ag and N doped titanium dioxide coatings containing Ti2.85O4N phase, prepared by magnetron sputtering and annealing

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Product

Resources

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Synthesis of Nickel-Doped TiO₂ Thin Films and Their Structural and Optical Properties at Different Annealing Temperatures

Critical Role of the NiO–Ni(OH)₂ Species Loaded Onto TiO₂ Photocatalyst in the Enhancement of H₂ Evolution Activity

Critical Role of the NiO–Ni(OH)₂ Species Loaded Onto TiO₂ Photocatalyst in the Enhancement of H₂ Evolution Activity