Silver and Gold Nanoparticles on Sol-Gel TiO2, ZrO2, SiO2 Surfaces: Optical Spectra, Photocatalytic Activity, Bactericide Properties

Eremenko, A. M.; Смирнова, Н. П.; Gnatiuk, Iurii; Linnik, Oksana; Vityuk, N. V.; Mukha, Yulia; Korduban, Aleksander

doi:10.5772/18252

Cited by 19 publications

(13 citation statements)

References 80 publications

(58 reference statements)

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“…As technological applications for TiO 2 can be cited its use in ultraviolet radiation absorbing filters [3,23], in chemical sensors for gases [24][25][26], as a bactericide [27], in biomaterials for bone implants [28], in environmental photocatalysis [8,24,29,30], in the photocatalytic hydrogen evolution [17,[31][32][33][34][35][36], in dye-sensitized solar cells [21,[37][38][39][40][41][42][43][44], among other.…”

Section: Titanium Dioxide (Tio 2 )mentioning

confidence: 99%

Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

Machado¹,

Borges²,

Silva³

et al. 2015

Solar Radiation Applications

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/59602 . Introduction . . Titanium dioxide TiOTiO is a promisinμ material λor technoloμical applications λor its versatility [ -], abundance, low toxicity, μood chemical stability, photosensitivity and photostability [ -]. In nature, it is λound mainly in the mineral ilmenite [ ], that can be processed industrially by two diλλerent routes [ ] The λirst, involves the reaction oλ the concentrate oλ ilmenite with hot sulphuric acid, resultinμ in the λormation oλ sulphates oλ titanium, Fe II and Fe III , beinμ these last eliminated by centriλuμation, aλter coolinμ. The λinal solution is then puriλied and hydrolyzed to produce pure TiO [ ]. The other usual way oλ obtaininμ consists in combininμ the ore with coke and μaseous chlorine under heatinμ, resultinμ in CO and a sponμy material rich in TiCl . The reaction product is subjected to successive λractional distillation, with the λormation oλ TiCl and TiCl , due to stability oλ titanium in other deμrees oλ oxidation. The diλλerent precursors oλ titanium are hydrolyzed, λorminμ titanium dioxide [ ]. In, [ ], obtained, λor the λirst time, success in decomposition oλ water under irradiation with liμht and without application oλ any electric potential. They reported that, in trials where they employed n-type TiO as anode and Platinum as cathode, when TiO electrode illuminated under short-circuit conditions, hydroμen evolved λrom the Platinum electrode, while oxyμen evolved λrom the anode. Since then, studies aimed at discoverinμ and explorinμ diλλerent possibilities oλ technoloμical application λor TiO have been μiven μreat importance [ -].© 2015 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and eproduction in any medium, provided the original work is properly cited.As technoloμical applications λor TiO can be cited its use in ultraviolet radiation absorbinμ λilters [ , ], in chemical sensors λor μases [ -], as a bactericide [ ], in biomaterials λor bone implants [ ], in environmental photocatalysis [ , , , ], in the photocatalytic hydroμen evolution [ , -], in dye-sensitized solar cells [ , -], amonμ other.The photocatalytic eλλiciency oλ TiO depends on its structural and morpholoμical characteristics, which are related to the method oλ synthesis used in the preparation oλ nanoparticles [ , , , ]. To be photoactive, λavorinμ the photocatalysis process, besides beinμ mainly consistinμ oλ anatase crystalline phase, the TiO must possess hiμh speciλic surλace area, μood porosity, with hiμh sized pores [ , , ]. In this context, the search λor TiO particles that have diλλerentiated λeatures, with catalytic properties potentiated, constitutes a λield oλ intense activity [ , , -]. . Porosity and porous materialsThe porosity, related to the presence oλ cavities, channels or interstices is oλ μreat importance since it is related t...

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Section: Titanium Dioxide (Tio 2 )mentioning

confidence: 99%

Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

Machado¹,

Borges²,

Silva³

et al. 2015

Solar Radiation Applications

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“…Few reports have been published about the studies on Au doped ZrO 2 by sol-gel method [13,17,18] but no information is available about the effect of Au on the Photoluminescence (PL) of ZrO 2 films. Moreover, the structural, optical and manipulation of electromagnetic radiation of Au doped zirconia thin films by solgel dip coating method have not been systematically studied yet.…”

Section: Introductionmentioning

confidence: 99%

Optical enhancement of Au doped ZrO2 thin films by sol–gel dip coating method

Berlin¹,

Joy²

2015

Physica B: Condensed Matter

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“…6d, the Au 4f curve fitting of the Au/Gd 2 O 3 sample displayed two Au 4f components at 84.35 and 88.02 eV, which correspond to Au 4f 5/2 and Au 4f 7/2 spin-orbit component, respectively. [47,48] The difference in binding energy of 3.7 eV between the Au 4f 7/2 and Au 4f 5/2 peaks and the FWHM of fitted peaks (< 0.9 eV) further emphasize the presence of Au metal on the particles surface. The calculated peak ratio of 3d 7/2: 3d 5/2 for Au in the fitting spectra is close particles, one absorption related to the noble metal shell is measured.…”

Section: Xps Analysis Of Janus-type Gd 2 O 3 Particlesmentioning

confidence: 99%

Asymmetric attachment and functionalization of plasmonic nanoparticles on ceramic interfaces

et al. 2018

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The demands for materials that integrate more than one functional imaging or therapeutic unit are of increasing interest for biomedical applications. Here, we present the step-by-step preparation of asymmetric and optically active particles, namely, Gd 2 O 3 @Ag, Gd 2 O 3 @Au, SiO 2 -N 3 @Au, and SiO 2 -SH@Au . Successful attachment of plasmonic nanoparticles to the surface of metal-oxide spheres without necessity of a potentially toxic inter-adhesive layer was proven by optical methods as well as X-ray photoelectron spectroscopy. The combination of optical and magnetic properties as present in Gd 2 O 3 @ Ag and Gd 2 O 3 @Au Janus-type particles leads to dual-imaging probes for optical and magnetic resonance imaging. In addition, functional groups, such as azide groups, were linked to the surface of silica particles previous to Au nanoparticle attachment. Subsequent site-selective click reactions with 5-FAM were successfully performed as demonstrated by UV-Vis measurements. All described systems exhibited excellent long-term stability and can, therefore, be considered as promising candidates for theranostic applications. Graphical abstract

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Silver and Gold Nanoparticles on Sol-Gel TiO2, ZrO2, SiO2 Surfaces: Optical Spectra, Photocatalytic Activity, Bactericide Properties

Cited by 19 publications

References 80 publications

Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

Applications of Mesoporous Ordered Semiconductor Materials — Case Study of TiO2

Optical enhancement of Au doped ZrO2 thin films by sol–gel dip coating method

Asymmetric attachment and functionalization of plasmonic nanoparticles on ceramic interfaces

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