The Surface Chemistry of Hybrid Nanometer-Sized Particles

Wang, Chuanyi; Liu, Chunyan; Chen, Jin; Shen, Tao

doi:10.1006/jcis.1997.4976

Cited by 46 publications

(31 citation statements)

References 24 publications

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“…Such condensation process may pull together the primitive TiO 2 particles into a larger mass by building up further oxide network. Similar phenomenon has been observed in the preparation of Au/TiO 2 [30] and Pt/TiO 2 [31]. Wang et al found that during the irradiation of a HAuCl 4 solution in the presence of TiO 2 colloid, the deposited Au clusters were localized on the surface of TiO 2 particles and the substrate part of Au/TiO 2 was larger than that of an individual TiO 2 before photodeposition [30].…”

Section: Characterization Of Ag/tiomentioning

confidence: 53%

The adsorption and reactions of methyl iodide on powdered Ag/TiO2

Liao

Wang

et al. 2004

Catalysis Today

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Section: Characterization Of Ag/tiomentioning

confidence: 53%

The adsorption and reactions of methyl iodide on powdered Ag/TiO2

Liao

Wang

et al. 2004

Catalysis Today

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“…For the purpose of curve fitting of Au 4f XPS spectra, the Au 4f 7/2 binding energy of Au 3+ was set to 85.9 eV, and that of Au 0 was set to 83.2–84.2 eV . In the Au 4f XPS spectra of TiO 2 /1Au, TiO 2 /5Au, and TiO 2 /10Au, Au 0 peaks were detected and attributed to metallic Au . For TiO 2 /1Au and TiO 2 /5Au, Au 3+ peaks were also detected.…”

Section: Resultsmentioning

confidence: 99%

Visible‐light‐responsive antibacterial activity of Au‐incorporated TiO₂ layers formed on Ti–(0–10)at%Au alloys by air oxidation

Ueda

Ito

et al. 2019

J Biomedical Materials Res

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Rutile TiO2 layers were formed on substrates of Ti–(0–10)at%Au alloys by a simple process of air oxidation, and their antibacterial activities were evaluated under visible‐light irradiation (λ ≥ 400 nm). Au was introduced into the TiO2 layers on Ti–(1–10)at%Au alloys and existed as both metallic Au nanoparticles and dissolved Au3+ ions. The TiO2 layers that formed on Ti–5at%Au and Ti–10at%Au alloys exhibited visible‐light photocatalytic activity, that is, degradation of stearic acid and antibacterial activity against Escherichia coli. These visible‐light activities were attributed to the surface plasmon resonance of metallic Au nanoparticles and the decrease in bandgap energy caused by dissolved Au3+ ions. The formation of hydroxyl radicals observed under visible‐light irradiation is attributable to antibacterial activity. From a cost perspective, a Ti–5at%Au alloy is more suitable as a substrate for the formation of a TiO2 layer with antibacterial properties than a Ti–10at%Au alloy. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 991–1000, 2019.

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“…The color of the TiO 2 particles after the second calcination turned to bluish-purple, different from the initial reddish-purple. The color of the nanosized particles depends on various factors such as particle size, filling ratio of the particles in a matrix, and dielectric constant of a matrix (8). The reflection spectrum for the modified TiO 2 indicated that the gold particles were not in direct contact with the TiO 2 surface but that they were instead covered with the nylon-11 oligomer, having a relatively low dielectric constant (9).…”

Section: Fig 2 Tem Images and The Size Distributions Of The Modifiementioning

confidence: 98%