Enhancement of acidic-basic properties of silica by modification with CeO2-Fe2O3 nanoparticles via successive ionic layer deposition

Попков, В.И.; Tolstoy, Valeri P.; Omarov, Shamil O.; Неведомский, В. Н.

doi:10.1016/j.apsusc.2018.12.129

Cited by 18 publications

(6 citation statements)

References 25 publications

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“…A wide peak expanded from 13.5° to 29.9° indicates the existence of amorphous silica phase in diatom frustule (Shen & Zhang 2019). A similar pattern has been reported in a large number of materials like diatoms (Nowak et al 2019), opal-A (Sun et al 2018), and silica gel (Popkov et al 2019) which contain amorphous silica. It can be 13 observed that the XRD pattern of pure WO3 shows the diffraction peaks located at 2θ = 13.…”

Section: Structural and Morphological Characteristicssupporting

confidence: 74%

Photocatalytic degradation of antibiotic and hydrogen production using diatom-templated 3D WO3-x@mesoporous carbon nanohybrid under visible light irradiation

Gholami

Khataee

Bhatnagar

2020

Journal of Cleaner Production

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Section: Structural and Morphological Characteristicssupporting

confidence: 74%

Photocatalytic degradation of antibiotic and hydrogen production using diatom-templated 3D WO3-x@mesoporous carbon nanohybrid under visible light irradiation

Gholami

Khataee

Bhatnagar

2020

Journal of Cleaner Production

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“…In addition, the intense absorption band at 1360 cm −1 is clearly visible, which corresponds to the vibrations of the C-O bond in the carbonate group. It's associated with the sorption of CO 2 from the air by the developed surface of the samples [34][35][36][37][38][39][40]. The absorption bands of the Zn-O and Fe-O bonds in the wavenumber region of 300-600 cm −1 cannot be identified because of their diffuse shape [36].…”

Section: Fig 3 Results Of Edx Analysis (A) and Sem Micrographs (B-d) Of Samples Zf-lhsmentioning

confidence: 99%

“…Automation of parameters allows to adjust the thickness of the electrocatalyst films, the selection of the composition and morphology. This method can be easily scalable for the synthesis of electrocatalytic materials at a standard temperature with simple hardware and the use of low-cost reagents [32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Layer by layer synthesis of zinc-iron layered hydroxy sulfate for electrocatalytic hydrogen evolution from ethanol in alkali media

Dmitriev¹,

Попков²

2019

Nanosystems: Phys. Chem. Math.

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This paper proposes a method for producing nanocomposite electrocatalytic coatings based on zinc-iron layered hydroxy sulfate Zn 2 Fe 4 (OH) 12 SO 4 • 8H 2 O and iron(III) hydroxide Fe(OH) 3 using the successive ionic layer deposition (SILD) method. The obtained materials were investigated with the methods of SEM and EDX, XRD, FTIR spectroscopy, and also were analyzed their electrocatalytic performance. These compounds are formed on the surface of the substrate in nanosheets shape with an average size of 6-17 nm, which self-organized into coral-like agglomerates. It was shown that by varying the anionic component of the reaction solution -NO 3− , SO 2− 4 or Cl − , effective control of the 2D nanocrystals phase composition is possible. It has been determined that electrocatalytic materials based on Zn 2 Fe 4 (OH) 12 SO 4 •8H 2 O and Fe(OH) 3 are active in the process of hydrogen evolution from alkaline water-alcohol solutions. In result overpotential value of hydrogen evolution reaction at 10 mA cm −2 decreases about ∼ 10%, as well as energy consumption to carry out this process reduces about 8-12%. as shown from the decline of the Tafel slope. The developed materials have high cyclic stability and short non-stationary mode, which allows them to be considered as the base of electrocatalysts for the processes of hydrogen evolution from ethanol in an alkaline medium.

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“…The layer-by-layer method is one technique that allows the synthesis of the nanocomposites mentioned above [28][29][30]. It is based on the sequential absorption of precursors on the substrate surface, followed by the removal of excess reagents.…”

Section: Introductionmentioning

confidence: 99%

Successive ionic layer deposition of Co-doped Cu(OH)2 nanorods as electrode material for electrocatalytic reforming of ethanol

Kodintsev¹,

Martinson²,

Lobinsky³

et al. 2019

Nanosystems: Phys. Chem. Math.

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In this work, a facile and cost-effective layer by layer method was proposed to synthesize novel high stable and effective electrode material based on the Co-doped Cu(OH) 2 nanocrystals. The crystals have orthorhombic structure and a rod-like morphology with a 23±2 nm in width and 43±4 nm in length. The composition of the nanocrystals corresponds to the 1 % Co-doped Cu(OH) 2 by EDX with no noticeable impurities as it was found by FTIR spectroscopy. It was shown that nickel electrode modified with nanorods is characterized by an overvoltage value of −347 mV at 10 mA/cm 2 , which is 250 mV lower than that of an initial pure nickel electrode. The value of Tafel slope that reaches 138 mV/dec, high stability of the Co-doped Cu(OH) 2 nanorods in chronopotentiometric (10 hours) and cyclic volamperometric (500 cycles) tests allows us to consider them as a prospective basis of electrode materials for the hydrogen evolution from renewable water-alcohol sources.

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Enhancement of acidic-basic properties of silica by modification with CeO2-Fe2O3 nanoparticles via successive ionic layer deposition

Cited by 18 publications

References 25 publications

Photocatalytic degradation of antibiotic and hydrogen production using diatom-templated 3D WO3-x@mesoporous carbon nanohybrid under visible light irradiation

Photocatalytic degradation of antibiotic and hydrogen production using diatom-templated 3D WO3-x@mesoporous carbon nanohybrid under visible light irradiation

Layer by layer synthesis of zinc-iron layered hydroxy sulfate for electrocatalytic hydrogen evolution from ethanol in alkali media

Successive ionic layer deposition of Co-doped Cu(OH)2 nanorods as electrode material for electrocatalytic reforming of ethanol

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