Functionalization of activated carbon surface with sulfonated styrene as a facile route for solid acids preparation

Diyuk, Vitaliy E.; Mariychuk, Ruslan; Lisnyak, Vladyslav V.

doi:10.1016/j.matchemphys.2016.09.034

Cited by 29 publications

(10 citation statements)

References 18 publications

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“…Thermogravimetric analysis (TGA) of DNDs was conducted at a heating rate of 10 °C min -1 in the air (Diyuk et al 2016a). Thermoprogrammed desorption (TPD) profiles of CO 2 + was registered at a heating ramp of 30 °C min -1 in a vacuum of 1 × 10 -6 Pa or lower (Diyuk et al 2016b).…”

Section: Methodsmentioning

confidence: 99%

Effect of ultrasonic treatment on the thermal oxidation of detonation nanodiamonds

et al. 2020

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In the present article, we showed the effect of ultrasonic treatment on the thermal oxidation of detonation nanodiamonds (DNDs) by considering the kinetic aspect of their thermal stability in the air, in the framework of the classical Arrhenius approach. Nanostructures and surface chemistry of the pristine, ultrasonicated, and oxidized DNDs were studied by miscellaneous physical techniques to clarify the origin of the effect. Ultrasonic treating decreases the heterogeneity of aggregated nanoparticles and removes admixtures and non-diamond carbon from the surface interface of nanodiamond grains. After thermal oxidation that followed ultrasonication treatment, the size-reduction of nanodiamond crystals caused the annihilation of nitrogen-vacancy centers and led to photoluminescence quenching. Because the number of surface defects reacting with air oxygen decreases after the ultrasonic treatment, the thermal stability of DND nanopowders towards oxidative treatment shows an increase.

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Section: Methodsmentioning

confidence: 99%

Effect of ultrasonic treatment on the thermal oxidation of detonation nanodiamonds

et al. 2020

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“…Concentrations of O-containing and amino groups (Cfg) were found from the TG data. Thermal programmed desorption mass spectroscopy (TPD MS) was performed on a monopole mass spectrometer MX 7304A [15]. Table 1 sums up the composition and texture parameters of the pristine sorbents.…”

Section: Methodsmentioning

confidence: 99%

CO₂ adsorption on pristine, oxidized, and diethylamine-functionalized activated carbon sorbents

et al. 2020

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Adsorption is currently the most promising capture technology to shorten atmospheric emissions of carbon dioxide (CO2). In this article, we report on the adsorption of CO2 onto pristine, oxidized, and aminated activated carbon (AC) sorbents. From our findings, some functionalized AC sorbents have shown very promising results in the CO2 capture process. Their maximum adsorption capacity measured by the thermogravimetric method at 20 °C varies between 2.2 and 3.9 mmol CO2/g depending on the content of diethylamino and oxygen-containing groups. The functionalization of the carbon surface with diethylamino groups improves the adsorption capacity by 30-40%. The CO2 adsorption little depends on the texture parameters of the pristine AC sorbents. In the range from 20 to 100 °C, the CO2 thermodesorption showed the effective regeneration of the sorbents. The aminated carbon surface demonstrates the best CO2 adsorption but binds the adsorbed molecules stronger than the oxidized surface, which limits the sorbent regeneration.

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“…Earlier, the measurements routine was conveyed in Diyuk et al. (2016a, 2016b, 2015). The quantification of certain functional groups was done from the area of the resolved TPD peaks.…”

Section: Methodsmentioning

confidence: 99%

“…The analyzer is operated in an inert gas medium or in vacuum using balances patterned after that of McBain and Bahr. Earlier, the measurements routine was conveyed in Diyuk et al (2016aDiyuk et al ( , 2016bDiyuk et al ( , 2015. The quantification of certain functional groups was done from the area of the resolved TPD peaks.…”

Section: Methodsmentioning

confidence: 99%

Modeling of copper ions adsorption onto oxidative-modified activated carbons

Grishchenko

Diyuk

Konoplitska

et al. 2017

Adsorption Science & Technology

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In this work, the adsorption of copper ions onto activated carbons that oxidatively modified with H 2 O 2 and HNO 3 was studied. The prepared sorbents with the surface area of 275-780 m 2 /g contain 0.53-3.77 mmol/g of oxygen-containing groups. It was found that the oxidized activated carbon effectively adsorbs Cu 2þ ions from aqueous solutions. For the most efficient activated carbon-HNO 3-30 sorbent, the percentage removal of copper ions from solutions of varying concentration is high. In the concentration range from 1.5 to 6 Â 10 À4 M of Cu 2+ , it reaches >55%. At the concentrations lower than 1.5 Â 10 À4 M, the expected removal is above 80%. The experimental equilibrium adsorption data were modeled with 2-and 3-parameter isotherms. The analysis of adsorption modeling results accounting for the surface heterogeneity effect was provided. The data fit well to the Dubinin-Radushkevich model. Presumably, the complexation of Cu 2þ with oxygen-containing groups passes within micropores. We found the correlation between the sorption capacity for Cu 2þ and the concentration of surface groups. The presence of the carboxyl, anhydride, and lactone groups make a major impact on the adsorption.

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Functionalization of activated carbon surface with sulfonated styrene as a facile route for solid acids preparation

Cited by 29 publications

References 18 publications

Effect of ultrasonic treatment on the thermal oxidation of detonation nanodiamonds

Effect of ultrasonic treatment on the thermal oxidation of detonation nanodiamonds

CO₂ adsorption on pristine, oxidized, and diethylamine-functionalized activated carbon sorbents

Modeling of copper ions adsorption onto oxidative-modified activated carbons

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Functionalization of activated carbon surface with sulfonated styrene as a facile route for solid acids preparation

Cited by 29 publications

References 18 publications

Effect of ultrasonic treatment on the thermal oxidation of detonation nanodiamonds

Effect of ultrasonic treatment on the thermal oxidation of detonation nanodiamonds

CO2 adsorption on pristine, oxidized, and diethylamine-functionalized activated carbon sorbents

Modeling of copper ions adsorption onto oxidative-modified activated carbons

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Product

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CO₂ adsorption on pristine, oxidized, and diethylamine-functionalized activated carbon sorbents