Porous structure of synthetic opals

Bardyshev, I. I.; Mokrushin, A. D.; Прибылов, А. А.; Samarov, É. N.; Масалов, В. М.; Karpov, I. A.; Emelchenko, G. A.

doi:10.1134/s1061933x06010029

Cited by 31 publications

(9 citation statements)

References 14 publications

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“…C-IOP structures were synthesized by the template method using an opal matrix composed of spherical globules of amorphous silicon dioxide 260 nm in diameter which was used as a template in accordance with 20 the technique of preparation of opal matrices is detailed in work. 22 The use of carbon inverse opals widens signicantly the possibilities of modication of their structure. The inverse opal structure contains voids of direct opal lled with organic or inorganic material which make up a frame of an opal-like structure, but it contains no SiO 2 globules.…”

Section: Methodsmentioning

confidence: 99%

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A novel sorbent for lanthanide adsorption based on tetraoctyldiglycolamide, modified carbon inverse opals

et al. 2015

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Carbon inverse opals (C-IOP) were noncovalently modified with tetraoctyldiglycolamide (TODGA). The effect of HNO 3 concentration in the aqueous phase and that of the TODGA concentration in the sorbent phase on the adsorption of microquantities of Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu nitrates from HNO 3 solutions by CIOP modified with TODGA was considered. The stoichiometry of the sorbed complexes has been determined by the slope analysis method. The efficiency of lanthanides(III) adsorption from moderate-concentration HNO 3 solutions increases with increasing atomic number of the element. The process of lanthanides(III) adsorption is exothermic, spontaneous and followed a pseudo-second-order kinetic model.

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Section: Methodsmentioning

confidence: 99%

“…22 The use of carbon inverse opals widens signicantly the possibilities of modication of their structure. 22 The use of carbon inverse opals widens signicantly the possibilities of modication of their structure.…”

Section: Introductionmentioning

confidence: 99%

A novel sorbent for lanthanide adsorption based on tetraoctyldiglycolamide, modified carbon inverse opals

et al. 2015

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“…Carbon inverted opal (C-IOP) nanostructures were synthesized by the template method using an opal matrix composed of spherical globules of amorphous silicon dioxide 260 nm in diameter which was used as a template in accordance with the technique of preparation of opal matrices is detailed in work [15].For the incorporation of carbon into the matrix, we used aqueous solution of sucrose, C 12 H 22 O 11 , with addition of sulfuric acid, with which samples were impregnated. The samples were placed into aqueous solution (per 1 g of SiO 2 , 1.25 g of C 12 H 22 O 11 , 0.14 g of H 2 SO 4 , and 5 g of H 2 O) and held with the solution at a temperature of 100 °C for about 5 h and, then dried up at a temperature of 160 °C for 18 h. After that, the samples were impregnated with a solution (1 g SiO 2 : 0.8 g C 12 H 22 O 11 : 0.09 g H 2 SO 4 : 5 g H 2 O) and the thermal treatment was repeated.…”

Section: The Preparation C-iop Structurementioning

confidence: 99%

C-IOP/NiO/Ni₇S₆composite with the inverse opal lattice as an electrode for supercapacitors

Сухинина¹,

Масалов²,

Zhokhov³

et al. 2015

SPIE Proceedings

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In this work, we demonstrate the results of studies on the synthesis, the structure and properties of carbon inverted opal (C-IOP) nanostructures, the surface of which is modified by oxide and sulfide of nickel. It is shown that the modification of the matrix C-IOP by nickel compounds led to a decreasing the specific surface area more than three times and was 250 m 2 /g. The specific capacitance of the capacitor with the C-IOP/NiO/Ni 7 S 6 composite as electrode has increased more than 4 times, from 130 F/g to 600 F/g, as compared with the sample C-IOP without the modification by nickel compounds. The significant contribution of the faradaic reactions in specific capacitance of the capacitor electrodes of the composites is marked.

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“…1(c) by the solid curve. The values for the opal effective refractive indices, n ω at 1064 nm and n 2ω at 532 nm, are obtained as the average indices of the spheres and voids of the opal, taking into account that the spheres have pore structure and form the closepacked fcc structure in opal [26]:…”

Section: Second-harmonic Nonlinear Diffractionmentioning

confidence: 99%

Efficient bidirectional optical harmonics generation in three-dimensional photonic crystals

Соболева¹,

Seregin²,

Fedyanin³

et al. 2011

J. Opt. Soc. Am. B

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Noncollinear generation of second and third harmonics in three-dimensional photonic crystals of artificial opals is experimentally realized and interpreted in terms of nonlinear diffraction. A factor-of-two enhancement of second-and third-harmonic generation intensity in diffraction maxima directions is observed due to effective phase matching provided by photonic crystal periodicity. Bidirectional diffraction of third harmonics at crystallographic planes ð111Þ and ð 1 11Þ is observed. The broadening of nonspecular diffraction peaks is found to correspond to the polycrystalline structure of the opal samples.

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Porous structure of synthetic opals

Cited by 31 publications

References 14 publications

A novel sorbent for lanthanide adsorption based on tetraoctyldiglycolamide, modified carbon inverse opals

A novel sorbent for lanthanide adsorption based on tetraoctyldiglycolamide, modified carbon inverse opals

C-IOP/NiO/Ni₇S₆composite with the inverse opal lattice as an electrode for supercapacitors

Efficient bidirectional optical harmonics generation in three-dimensional photonic crystals

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Porous structure of synthetic opals

Cited by 31 publications

References 14 publications

A novel sorbent for lanthanide adsorption based on tetraoctyldiglycolamide, modified carbon inverse opals

A novel sorbent for lanthanide adsorption based on tetraoctyldiglycolamide, modified carbon inverse opals

C-IOP/NiO/Ni7S6composite with the inverse opal lattice as an electrode for supercapacitors

Efficient bidirectional optical harmonics generation in three-dimensional photonic crystals

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C-IOP/NiO/Ni₇S₆composite with the inverse opal lattice as an electrode for supercapacitors