Synthesis and Structure Determination of Carbonized Nano Mesoporous Materials Based on Vegetable Raw Materials

Azat, Seitkhan; Павленко, В. В.; Kerimkulova, A. R.; Mansurov, Z. A.

doi:10.4028/www.scientific.net/amr.535-537.1041

Cited by 20 publications

(9 citation statements)

References 2 publications

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“…C, Fe, Cu, Zn, Mn, Cr, Ca, K, Ti, Cl, S, Ni, Si were found. This fact corresponds to the reference data [10][11][12][13][14][15][16][17][18][19]. Unmodified BS samples and composite materials obtained on its base were investigated by EDAX method in order to establish their elemental composition.…”

Section: Resultsmentioning

confidence: 99%

“…Some Kazakhstan scientists investigate RH from different regions of Kazakhstan using it mainly as an adsorbent for waste water treatment and similar purposes. [10][11][12][13][14][15], production of technical silicon [16] or for the supercapacitors [17][18]. All experiments in this study were carried out with RH, taken from the Terenuzek village, Kyzylorda region, Kazakhstan.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and Electrochemical Behavior of the Molybdenum- Modified Electrode Based on Rice Husk

Kamysbayev

Serikbayev

Arbuz

et al. 2017

Eurasian Chem. Tech. J.

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The article presents the results of electrochemical studies made on carbon paste electrode based on bisorbents powder modified by molybdenum. Bisorbent consists of carbon and SiO 2 . It was synthesized as a support structure obtained from rice husk thermal decomposition products. The obtained sorption material has surface with high specific area -200 m 2 /g. Bisorbent was further modified by (NH 4 ) 6 Mo 7 O 24 · 4H 2 O (10 wt.%). The elemental composition of used RH was also determined. The surface morphology of plain and modified BS samples was studied. Recording of voltammetric curves was carried out at рН = 3.80, рН = 6.40 in 0.2 М electrolyte solution of Li 2 SO 4 . Cathodic and anodic waves were obtained which related to oxidation and reduction processes of molebdenium compounds in the entire range of the potentials (0.8 ÷ -1.2 V). The range of changing molybdate ions concentrations in solution was 2·10 -4 ÷ 10 -2 M. The dependencies of kinetic and electrochemical parameters on paramolybdate ions concentration were studied for modified electrode. Nature of changes in molybdenum reduction currents and oxidation currents indicates that Mo +6 reduction may occur by different mechanisms depending on the composite electrode properties. Results showed the possibility of further the synthesized composite system use for voltammetric determination of low (10 -4 -10 -2 ) concentrations of ions in a solution.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synthesis and Electrochemical Behavior of the Molybdenum- Modified Electrode Based on Rice Husk

Kamysbayev

Serikbayev

Arbuz

et al. 2017

Eurasian Chem. Tech. J.

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“…Consequently, because of its high percentage in the composition of grain, the husk is considered a by-product in the mills and creates problems of recycling [4][5]. In the past decades, rice husk is extensively used as a construction material to produce concrete [6], or as an adsorbent for the removal of organic dyes, such as indigo carmine dye, and heavy metals such as lead, mercury, cadmium and zinc from wastewater metal ions [7][8]. Because of its high silicon amount, rice husk can be an economically-practical raw material for silicate production and silica materials.…”

Section: Introductionmentioning

confidence: 99%

Perspectives of the Silicon Dioxide Production from Rice Husk in Kazakhstan: an Overview

Kapizov

Azat

Askaruly

et al. 2020

Eurasian Chem. Tech. J.

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Rice husks (RHs) are the hard-protecting coverings of grains of rice. Considering the fact that this agricultural waste accumulates over the years, the need for prompt resolve for RH waste is readily apparent. As claimed by the Food and Agriculture Organization of the United Nations (FAO), the production of the global paddy rice in 2016 is considered to be 748.0 million tons. Based on this, the amount of RHs makes up about ~20% of paddy rice production by weight. Much of this production is treated as waste and either thrown into rivers or tossed on landfills, often causing pollution problems when it decays or simply returned to the fields where it can become airborne. This work presents synthesis routes for the production of SiO2 from RH sourced in Kazakhstan. RH, chosen from Almaty, Kyzylorda and Turkystan regions, was utilized as the major silica source. The results shown verified that the highest purity (98.2–99.7%) amorphous silica with a certain surface area between 120–980 m2 g-1 could be extracted during acid treatment and controlled calcination. The structure is amorphous, porosity diameter reduced from 26.4 nm to 0.9 nm, certain pore volume raised from 0.5 to 1.2 cm3 g‒1.

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“…RH has been applied as a raw material for different industrial applications such as an additive for cement or concrete fabrication [4], fuel for power generation [5] and the synthesis of carbon materials [6,7], an organic fertilizer in agriculture [8], an adsorbent for the removal of toxic metals from wastewater [9], an adsorbent for biomedical use [10], and in the production of bioethanol [11]. Furthermore, the higher silica content in RH makes it an ideal potential source for the preparation of value-added silicon-based materials, including silicon carbide, silicon nitride, silicon tetrachloride, zeolite, and silicates [12].…”

Section: Introductionmentioning

confidence: 99%

Extraction of high-purity silica from rice husk via hydrochloric acid leachingtreatment

Azat¹,

Sartova²,

Бексейтова³

et al. 2019

Turk J Chem

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The present paper aimed at the investigation of the effect of preliminary acid treatment on the structure and purity of extracted silica. In this study, the acid leaching of rice husk (RH) in 2 M hydrochloric acid solution before the calcination process at 600 • C was proposed to achieve completely white silica with high specific surface area and low content of impurities. RH, selected from the Almaty Region, Kyzylorda Region, and Turkestan Region was used as the main silica source. The results confirmed that the highest purity (98.2%-99.7%) amorphous silica with a specific surface area between 120 and 980 m 2 g −1 could be extracted during acid treatment and controlled calcination. The structure is amorphous, porosity diameter decreased from 26.4 nm to 0.9 nm, and specific pore volume increased from 0.5 to 1.2 cm 3 g −1 .

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Synthesis and Structure Determination of Carbonized Nano Mesoporous Materials Based on Vegetable Raw Materials

Abstract: This article presents the results of the synthesis of carbon nanomaterials: Nanoscale materials obtained by carbonization of waste agricultural products (apricot kernel, walnut, rice husk). The results of physico-chemical characteristics of the obtained nanomaterials.

Cited by 20 publications

References 2 publications

Synthesis and Electrochemical Behavior of the Molybdenum- Modified Electrode Based on Rice Husk

Synthesis and Electrochemical Behavior of the Molybdenum- Modified Electrode Based on Rice Husk

Perspectives of the Silicon Dioxide Production from Rice Husk in Kazakhstan: an Overview

Extraction of high-purity silica from rice husk via hydrochloric acid leachingtreatment

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