Experimental Study of Montmorillonite Structure and Transformation of its Properties under the Treatment of Inorganic Acid Solutions

Krupskaya, V. V.; Закусин, С. В.; Tyupina, E. A.; Dorzhieva, O. V.; Zhukhlistov, A. P.; Timofeeva, Maria N.; Белоусов, П. Е.

doi:10.20944/preprints201612.0100.v1

Cited by 27 publications

(42 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…04-0850) [26,27]. Other diffraction peaks are related to the structure of MMT [28]. Also, by Debye-Scherrer equation, the average particle size of Ni-MMT nanocomposite was found to be 20 nm.…”

Section: Characterization Of the Ni-mmt Nanocompositementioning

confidence: 93%

Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

et al. 2019

View full text Add to dashboard Cite

Direct methanol fuel cell is claiming to be the most main power source in future as a clean energy source, for which methanol is used as fuel. In the present study, nickel nanoparticles were synthesized by green route in the presence of montmorillonite (Ni-MMT). Then the electrochemical activity of prepared nanocomposite was investigated in methanol oxidation reaction in acidic medium. In the process of nickel nanoparticle synthesis, the natural substrate montmorillonite was used as capping agent and Allium jesdianum water extract was used as the source of reducing agent for the first time. The Ni-MMT sample was characterized by UV-Vis, XRD, SEM and EDX techniques. Production of nickel nanoparticles in the proposed green method is confirmed by absorption peak of 405 nm in UV-Vis spectrum. The average particle size of Ni-MMT was determined as 20.80 nm. The oxidation of methanol in acidic medium was studied by cyclic voltammetry using Ni-MMTmodified carbon paste electrode (Ni-MMT/CPE). Methanol was oxidized on the modified electrode surface at 0.3 V. Also, the catalytic current of methanol oxidation was 3 mA in H 2 SO 4 electrolyte which is significantly more than unmodified CPE. The concentration of 0.5 M for H 2 SO 4 was obtained as the optimum electrolyte for the oxidation of methanol. Methanol can be catalyzed in the concentration range of 0.1-0.5 M by the prepared nanostructured catalyst. Graphic abstractNi nanoparticles in montmorillonite (Ni-MMT) which was prepared by Allium jesdianum extract have a good electrocatalytic effect on methanol oxidation.

show abstract

Section: Characterization Of the Ni-mmt Nanocompositementioning

confidence: 93%

Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Such behaviour was confirmed by XRD measurements. The analysis of their results indicated only minimal changes in basal spacing d 001 (Frost and Rintoul 1996;Krupskaya et al 2017), obtained at values of 2θ angle changing in the range 6-6.5, for the montmorillonite particles modified with ionic polyacrylamide and Cr(VI) ions (Table 2) in comparison to the unmodified solid.…”

Section: Adsorption Of Polyacrylamide and Cr(vi) On The Montmorillonimentioning

confidence: 99%

Comparison of adsorption affinity of anionic and cationic polyacrylamides for montmorillonite surface in the presence of chromium(VI) ions

et al. 2018

View full text Add to dashboard Cite

Erosion, which is considered to be global problem, is the process of soil environment degradation due to the impact of wind (soil blowing, deflation) and water (soil washing, deep erosion). This leads to destruction of its structure, nutrients removal and finally bedrock exposition and desertification. One of the ways to prevent this phenomenon is the soil conditioners usage. These substances, also called soil flocculants, are macromolecular compounds which contribute to the reinforcement of soil structure as a result of its adsorption on the mineral surface. The soil conditioners commonly used in agriculture is ionic polyacrylamide (PAM)-both anionic and cationic. These macromolecular substances affect soil surface properties and adsorption behaviour of substances present in the environment-nutrients, organic molecules and also hazardous compounds as well as toxic heavy metals (i.e. chromium(VI) ions). The aim of this study was to investigate the impact of solution pH, type of ionic groups in the polyacrylamide macromolecules and chromium(VI) ion concentration on the adsorption mechanism of Cr(VI) and PAM on the montmorillonite surface. The adsorption and electrokinetic properties of the montmorillonite-AN PAM or CT PAM/Cr(VI) systems were examined by means of spectrophotometry, potentiometric titration, SEM, XRD and DRS methods. It was shown that in the adsorbed layer composed of PAM-Cr(VI) complexes reduction of Cr(VI) to Cr(III) takes place.

show abstract

“…Montmorillonite is a unique clay possessing cationexchange properties due to heterovalent (Al 3+ by Mg 2+ ) substitution in central octahedron metal-hydroxyl ions sheets, providing to layers a negative charge [1]. This property was explored to create polymer-clay composite sorbents to fix natural dyes (including anthocyanins) [2].…”

Section: Introductionmentioning

confidence: 99%

Peculiarities of Use of Bentonite Clay at Solid-Phase Purification of Anthocyanins and Flavonoids from Leaves of Plants

Doronin¹,

Дейнека²,

Deineka³

et al. 2019

Proceedings of the 1st International Symposium Innovations in Life Sciences (ISILS 2019)

View full text Add to dashboard Cite

Anthocyanins of red colored leaves of Cercis canadensis L. were found to be 3-glucosides of five common anthocyanidins-of delphinidin, cyaniding, petunidin, peonidin and malvidin with overall accumulation more than 350 mg per 100 g of FW in early summer. The content of anthocyanins gradually drops to total disappearance at the late September. Extract of anthocyanins may content a large amount of flavonoids that are not separated during solid phase extraction (SPE) on C18-silica syringe cartridges. In the paper, the ability of bentonite clay as a sorbent for SPE of anthocyanins was investigated. Non-charged flavonoids were shown to compete with anthocyanins during sorption. Meanwhile sorption ability of anthocyanins markedly exceeds that of non-charged flavonoids. The method for anthocyanins and non-charged flavonoids is proposed.

show abstract

Experimental Study of Montmorillonite Structure and Transformation of its Properties under the Treatment of Inorganic Acid Solutions

Cited by 27 publications

References 20 publications

Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

Electrochemical activity of Ni-montmorillonite/Vulcan XC-72R carbon black nano-catalyst for the oxidation of methanol in acidic medium

Comparison of adsorption affinity of anionic and cationic polyacrylamides for montmorillonite surface in the presence of chromium(VI) ions

Peculiarities of Use of Bentonite Clay at Solid-Phase Purification of Anthocyanins and Flavonoids from Leaves of Plants

Contact Info

Product

Resources

About