Some properties of milled vanadium phosphates

Janusz, W.; Khalameida, S.; Sydorchuk, V.; Skwarek, Ewa; Zazhigalov, V. A.; Skubiszewska–Zięba, J.; Лебода, Р.

doi:10.1007/s10450-010-9238-x

Cited by 15 publications

(8 citation statements)

References 19 publications

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“…To summarize the surface properties, the formation of macroporous stannite was achieved and the general phenomenon of dry milling, namely the formation of the compounds at high pressures and temperatures generally leading to the formation of the agglomerates with low specific surface area [46], was confirmed for this case.…”

Section: Resultsmentioning

confidence: 99%

Mechanochemical Solvent-Free Synthesis of Quaternary Semiconductor Cu-Fe-Sn-S Nanocrystals

Baláž

Sayagués

et al. 2017

Nanoscale Res Lett

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In this study, we demonstrate a one-pot mechanochemical synthesis of the nanocomposite composed of stannite Cu2FeSnS4 and rhodostannite Cu2FeSn3S8 nanocrystals using a planetary ball mill and elemental precursors (Cu, Fe, Sn, S). By this approach, unique nanostructures with interesting properties can be obtained. Methods of XRD, Raman spectroscopy, UV-Vis, nitrogen adsorption, SEM, EDX, HRTEM, STEM, and SQUID magnetometry were applied. Quaternary tetragonal phases of stannite and rhodostannite with crystallite sizes 18–19 nm were obtained. The dominant Raman peaks corresponding to the tetragonal stannite structure corresponding to A-symmetry optical modes were identified in the spectra. The bandgap 1.25 eV calculated from UV-Vis absorption spectrum is very well-acceptable value for the application of the synthesized material. The SEM micrographs illustrate the clusters of particles in micron and submicron range. The formation of agglomerates is also illustrated on the TEM micrographs. Weak ferromagnetic properties of the synthesized nanocrystals were documented.

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Section: Resultsmentioning

confidence: 99%

Mechanochemical Solvent-Free Synthesis of Quaternary Semiconductor Cu-Fe-Sn-S Nanocrystals

Baláž

Sayagués

et al. 2017

Nanoscale Res Lett

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“…Other mechanisms associated with crystallization processes, which often cause an increase in specific surface area and pore volume [20], do not take place under these conditions for amorphous silica and zirconium phosphate. These methods of modification have also shown their efficiency in regulating the physicochemical characteristics of vanadium phosphates [25,26] and titanium phosphate [27] as well as zirconium dioxide [28]. Preliminary results were also obtained for tin phosphate precipitated in strongly acid medium and then modified through hydrothermal and microwave treatments [29].…”

Section: Introductionmentioning

confidence: 98%

Influence of hydrothermal, microwave and mechanochemical treatment of tin phosphate on porous structure and catalytic properties

Sydorchuk¹,

Khalameida²,

Charmas

et al. 2021

J Sol-Gel Sci Technol

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Micro-mesoporous tin phosphate is prepared via precipitation under acid medium with subsequent modification using hydrothermal, microwave, and mechanochemical treatments (HTT, MWT, and MChT, respectively). The structure of the initial and modified samples is studied using nitrogen adsorption-desorption, DTA-TG and XRD analysis, FTIR spectroscopy, and SEM. Selected samples are tested as catalysts in aldol condensation of formaldehyde with acetic acid and in photocatalytic degradation of safranin T under visible irradiation. It is established that modification, primarily under hydrothermal conditions, results in the formation of mesoporous or meso-macroporous structure which is more accessible for the reagents molecules and more resistant to sintering and coking at higher temperature. Maximum effect is obtained in the case of modification of wet gel. Catalytic performance of the tested samples in aldol condensation is primarily determined by the parameters of their porous structure. The acquisition of photocatalytic activity is due to the narrowing of the band gap as a result of modification.

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“…Mechanochemical destruction allows the solids activate and especially to increase their dispersion and significantly alter surface properties (Heinike 1984). Mechanochemical treatment of vanadium phosphate was performed in a planetary ball mill in air, water and ethanol mediums (Janusz et al 2010). Activation in water and ethanol increases a specific surface area until 11m 2 /g and pore volume of 0.39 cm 3 /g.…”

Section: Mechanical Activation Of Apricot Kernels Shellsmentioning

confidence: 99%

Characteristics of Activated Carbons Prepared from Apricot Kernel Shells by Mechanical, Chemical and Thermal Activations

Satayev¹,

Alibekov²,

Satayeva³

et al. 2015

MAS

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The regulating of a structure and a pores volume of activated carbons by mechanical, chemical and thermal activations of agricultural wastes, such as apricot kernel shells were studied. The mechanical activation was provided in the grinding mill, in the aqueous medium. The chemical activation was implemented by treatment with sulfuric, hydrochloric, phosphoric acids at the concentrations of 5%-40% and by zinc chloride at the penetration coefficients of 0.1÷0.6. The thermal activation was effected in carbon dioxide atmosphere at the temperatures of 300÷100 о С. It was researched an influence of acid concentration, ZnCl 2 coefficient of impregnating, CO 2 temperature per volume of micro-, meso-and macropores. Activated carbons have arranged porous structures in the following line: processed by ZnCl 2 and CO 2 > processed by ZnCl 2 > processed by H 2 SO 4 > processed by H 3 PO 4 . For the samples are treated by ZnCl 2 and subsequent CO 2 , the activation optimal parameters are following: temperature of CO 2 =500 о С; the penetration coefficient = 0.4.

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Some properties of milled vanadium phosphates

Cited by 15 publications

References 19 publications

Mechanochemical Solvent-Free Synthesis of Quaternary Semiconductor Cu-Fe-Sn-S Nanocrystals

Mechanochemical Solvent-Free Synthesis of Quaternary Semiconductor Cu-Fe-Sn-S Nanocrystals

Influence of hydrothermal, microwave and mechanochemical treatment of tin phosphate on porous structure and catalytic properties

Characteristics of Activated Carbons Prepared from Apricot Kernel Shells by Mechanical, Chemical and Thermal Activations

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