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Гапоненко, Н. В.

doi:10.1023/a:1015397021912

Cited by 18 publications

(3 citation statements)

References 48 publications

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“…[1][2][3][4] It was demonstrated in the last ten years that the combination of sol-gel solids with porous anodic alumina (PAA), with its self-organized morphology, is a promising way for creation of materials with advanced optical properties due to the capability of the xerogel to penetrate effectively the pore volume. [5][6][7][8] A schematic diagram of the xerogel-porous anodic alumina structure is depicted in Fig. 1.…”

Section: Introductionmentioning

confidence: 99%

Lanthanide‐doped sol‐gel‐derived films fabricated in mesoporous anodic alumina

2005

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Abstract— Porous anodic alumina films with controllable morphology were fabricated under varied anodizing conditions and examined by scanning electron microscopy and photoluminescence analysis. Erbium‐, terbium‐, and europium‐doped xerogel films were formed inside the porous layer. Strong visible and infrared photoluminescence from the erbium‐doped xerogel/porous anodic alumina structure was observed. An electroluminescent cell based on xerogel/porous anodic alumina structure was also developed, with terbium‐ and europium‐related electroluminescence investigated.

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Section: Introductionmentioning

confidence: 99%

Lanthanide‐doped sol‐gel‐derived films fabricated in mesoporous anodic alumina

2005

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“…Earlier investigations revealed that among other mesoporous matrices, including porous silicon or artificial opals, PAA is the most promising for embedment of optically active lanthanide species by the sol-gel method due to its reproducible morphology and relatively low cost of synthesis, and resulting interesting optical properties [3].…”

Section: Introductionmentioning

confidence: 99%

Influence of porous anodic alumina matrix upon europium luminescence from sol–gel-derived films

Молчан

Гапоненко

Kudrawiec

et al. 2003

Materials Science and Engineering: B

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“…Alternatively, to us it seems feasible to form a porous titanium oxide by the sol-gel method, using the tubular surface of porous anodic aluminum oxide as the base [10][11][12][13][14].…”

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Titanium oxide xerogel films in porous aluminum oxide for photocatalytic application

et al. 2010

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We have used the sol-gel method to synthesize titanium dioxide in the pores of an anodic aluminum oxide membrane. The samples were used for the test reaction of degradation of the organic dye rhodamine B. The concentration of the dye rhodamine B was monitored from the change in the absorption spectra in the 554 nm region, for an aqueous solution containing the dye and exposed to the emission from a mercury lamp. The synthesized samples of titanium oxide xerogel in the porous anodic aluminum oxide membrane are efficient photocatalysts for decomposition of organic dyes in an aqueous medium.Introduction. From the time photocatalytic decomposition of water on TiO 2 electrodes was discovered in 1972, photocatalytic oxidation of aqueous and gaseous contaminants has been studied intensively with the aim of solving the problem of environmental pollution [1][2][3][4]. Compared with other semiconductors, TiO 2 has found broad application due to its physical and chemical stability, corrosion resistance, low cost, and lack of toxicity. The TiO 2 bandgap width is 3.2 eV and 3.0 eV for anatase and rutile respectively [5]. Practically any organic compound can be oxidized on the surface of TiO 2 down to CO 2 and H 2 O, so design of photocatalysts based on TiO 2 to remove toxic organic substances from water and air is an important and quite realistic applied problem. Recently studies of catalytic processes using TiO 2 have been aimed at obtaining immobilized catalysts in the form of thin films with an extended surface and stable porous structure, making it possible to reduce energy costs associated with separation of reaction mixtures when using powdered catalysts [6].Accordingly, interest in photocatalysis has been focused on development of methods for synthesis of porous titanium oxide, such as anodizing titanium and obtaining semiconductor TiO 2 nanotubes for oxidative photoelectrochemistry [7], using pore-formers [8] and templates to form a regular mesoporous structure [9]. Films have been deposited both on the smooth surface of glass, metal, and silicon and also on the smooth surface obtained by etching borosilicate glass in hydrofluoric acid [8].Alternatively, to us it seems feasible to form a porous titanium oxide by the sol-gel method, using the tubular surface of porous anodic aluminum oxide as the base [10][11][12][13][14].Experimental Procedure. Samples of aluminum foil (99.99% pure) of thickness 0.2 mm were degreased in a solution based on potassium dichromate (3%) and sulfuric acid (80%) and, after washing and drying, were electrochemically polished in a mixture of ethanol and perchloric acid (5:1) at T ≤ 15

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Untitled

Cited by 18 publications

References 48 publications

Lanthanide‐doped sol‐gel‐derived films fabricated in mesoporous anodic alumina

Lanthanide‐doped sol‐gel‐derived films fabricated in mesoporous anodic alumina

Influence of porous anodic alumina matrix upon europium luminescence from sol–gel-derived films

Titanium oxide xerogel films in porous aluminum oxide for photocatalytic application

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