Green synthesis of templated carbon porous materials from simple raw materials

Besinella, Geovanny Broetto; Padilha, J. E.; Scheufele, Fabiano Bisinella; Gasparrini, Lázaro José; Borba, Carlos Eduardo; Alves, Helton José

doi:10.1039/d0ma00483a

Cited by 10 publications

(9 citation statements)

References 55 publications

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“…The change in the format of the diffractograms (Fig. 6) was confirmed by the refinement data; it was possible to note that the amount of quartz phase increased in all activated carbons synthesized from ashes, especially the A.C. (IV) in which its composition was 100% quartz; this is relevant data that showed that this material can be used as a source of crystalline SiO 2 in various processes from catalyst synthesis, molecular sieves, and zeolites, in addition to being used in energy applications and civil construction [65][66][67][68].…”

Section: Adsorbent Characterizationsupporting

confidence: 60%

Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system

et al. 2022

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Nanostructured crystalline composite (activated carbon) was synthesized from residual ashes of the burning process of the sludge generated in the flotation step of a poultry slaughterhouse and was used for Allura red dye adsorption. The ashes were chemically activated using two types of reagents, H 2 O 2 and H 3 PO 4 , and the structure, morphology, and surface of the adsorbents were characterized by different techniques such as scanning electron microscopy with energy dispersive spectroscopy (SEM/ EDS), N 2 adsorption/desorption isotherms with Brunauer-Emmett-Teller (BET) method and Barret-Joyner-Hallenda (BJH) method, Fourier transform infrared spectroscopy (MID/FTIR), X-ray diffraction (XRD), and the point of zero charge (PZC). The adsorbent synthesized with H 3 PO 4 at 400 ºC displayed the best performance in removing dye molecules in 10 mg.L -1 solution, with a removal rate of approximately 100% when using a concentration of 2 g.L -1 in particle size of 0.42 mm. Besides that, the adsorbent synthesized with H 3 PO 4 had a particle diameter of approximately 15 Å, a size corresponding to the nanometer range, presented a crystallinity structure with well-defined phases such as quartz and the major elements in the composition were carbon and silicon. The surface area of the ashes enlarged from 14.71 to 448.1 m 2 .g -1 when H 3 PO 4 was used as an activator, producing a high-quality adsorbent, with an excellent cost-benefit, being it possible to be produced for a price of 9.35 USD.kg -1 , a price lower than the commercial activated carbon, making it a promising candidate for application in an industrial environment.

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Section: Adsorbent Characterizationsupporting

confidence: 60%

Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system

et al. 2022

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“…For the analysis, the samples were placed on a double‐sided carbon tape and then dried and metallized by sputtering with a thin layer of gold on the surface. [ 19 ]…”

Section: Methodsmentioning

confidence: 99%

Influence of the glycerin content in the preparation of calcium diglyceroxide from eggshell applied in the residual oil transesterification

2022

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Currently, biodiesel is pointed out worldwide as the main alternative in the complementation and substitution of petrochemical diesel. However, the current industrial route of synthesis of this biofuel depends on the cost of raw materials (which are also destined for food purposes) and the expense of the production process. Aiming to remedy this obstacle, the use of solid, sustainable, low-cost, efficient, and reusable catalysts in residual raw materials, such as waste cooking oils, has been highlighted as a promising alternative. This work focused on studying the influence of the glycerin content used in the preparation by wet impregnation of catalyst calcium diglyceroxide in the efficiency of transesterification of waste cooking oil. The catalyst was synthesized from CaO from chicken eggshell, raw glycerin co-product from biodiesel, and methanol. The transesterification reactions were performed using 120 g of frying residual oil, methanol: oil molar rate of 6:1, constant shaking, and reaction temperature of 63 ± 1 C for 180 min. The catalyst material synthesized with residual glycerin was active for four reactions (without reactivation of its sites) with high percentages of efficiency of 96.13, 96.85, 95.93, and 91.65, respectively. It was noted that the glycerol purity correlated with changes in the structural morphology of the final compound, as well as changes in the leaching rate, acidity index, water content, and ester content of the blends.

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“…Therefore, the application of these materials is hindered by the associated hazards and toxicity. [18,19] Given the high pore volume and specific area values obtained using Aerosil silica (Table 1), it was decided to use this silica as a template in the present study. A green synthesis technique was developed based on the method described by Besinella et al, [19] enabling the production of carbonaceous materials with high specific area and pore volume.…”

Section: Carbon Precursor Activation Removal Techniquementioning

confidence: 99%

“…[18,19] Given the high pore volume and specific area values obtained using Aerosil silica (Table 1), it was decided to use this silica as a template in the present study. A green synthesis technique was developed based on the method described by Besinella et al, [19] enabling the production of carbonaceous materials with high specific area and pore volume. The simple template methodology is controllable, inexpensive, and reproducible, employing readily available raw materials (commercial sugar, Aerosil silica, and deionized water).…”

Section: Carbon Precursor Activation Removal Techniquementioning

confidence: 99%

“…The methodology was based on the work of Postnov et al, [17,19] using Aerosil-380 pyrolyzed silica (Sigma-Aldrich) as the template and commercial white crystal sucrose as the carbon precursor, at a silica:sucrose mass ratio of 1.5, with 100 ml of distilled water for every 50 g of the mixture. The system was mechanically mixed for 5 h, followed by refrigeration of samples for periods of between 1 and 9 days, for the aging of the template precursor composite (gel), in translucent containers sealed with plastic film in order to determine the influence of aging time.…”

Section: Synthesis Of Porous Carbonsmentioning

confidence: 99%

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Green synthesis of templated porous carbons

et al. 2022

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Porous carbon materials such as activated carbons are widely used industrially for the purposes of purification, decolourization, deodorization, and gas storage, among others. Routes for the synthesis of these materials employing templates have increasingly attracted attention due to the ease of manipulating the characteristics of the final product. In the present work, a simple synthesis method was applied for the production of highly porous carbon materials using commercial sugar as the carbon source, Aerosil silica as a template, and deionized water. The synthesis procedure was as follows: (I) Gel formation; (II) carbonization of the gels; (III) removal of the silica template; (IV) activation. The materials were characterized by N2 and CO2 physisorption, Raman spectroscopy, X‐ray diffraction, Fourier‐transform infrared spectroscopy (FTIR), scanning electron microscopy, and thermogravimetric analysis. The aging time had an important influence on the specific area and porosity of the material, with physisorption analysis revealing a high specific area and pore volume. The activation procedures further contributed to significantly increasing the specific area (up to 1158 m2 g−1) and pore volume (up to 1.65 cm3 g−1). The X‐ray diffractograms and Raman spectra identified the formation of semi‐crystalline structures in the material, with the presence of a random distribution of graphite and graphene oxide, in addition to amorphous carbon. FTIR analysis showed the presence of bands corresponding to aromatic groups. The results demonstrated that it was possible to obtain materials with excellent potential for use in different industrial sectors using simple raw materials and a technique that is easy to reproduce.

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Green synthesis of templated carbon porous materials from simple raw materials

Abstract: Carbon-based porous materials (CPM) have recently received attention due to their many applications. In this context, this work focused on the development of a simple synthesis method to produce highly...

Cited by 10 publications

References 55 publications

Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system

Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system

Influence of the glycerin content in the preparation of calcium diglyceroxide from eggshell applied in the residual oil transesterification

Green synthesis of templated porous carbons

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