Synthesis of mesoporous carbons with controlled morphology and pore diameters from SBA-15 prepared through the microwave-assisted process and their CO2 adsorption capacity

Lakhi, Kripal S.; Wang, S.; Choy, Jin‐Ho; Al‐Ejji, Maryam; Abdullah, Aboubakr M.; Al-Enizi, Abdullah M.; Vinu, Ajayan

doi:10.1016/j.micromeso.2016.06.040

Cited by 53 publications

(18 citation statements)

References 38 publications

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“…An ew approach is clearly needed, both in the assembly of hard templates and in heating profiles.I no ur quest of finding alternative paths,w ee nvisioned that rapid self-assembly of uniform nanoparticles could alleviate the need for controlled assembly.A nd contrary to their ubiquitous use in organic synthesis, [12] we discovered that microwave heating has never been employed in ordering nanoparticle based hard templates for the mesoporous templating procedures.Existing literature mainly employs microwaves to facilitate rapid reaction and pyrolysis. [13] One promising application for ordered mesoporous carbons is to be active hosts for hydrogen storage materials, where solid-state hydrogen storage techniques have become important for efficient and safe use of hydrogen as af uture fuel. Among various hydrogen storage media, complex hydrides such as NaAlH 4 have been considered as leading materials on account of their high volumetric hydrogen storage capacities.…”

Section: Introductionmentioning

confidence: 99%

Rapid Access to Ordered Mesoporous Carbons for Chemical Hydrogen Storage

et al. 2021

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Ordered mesoporous carbon materials offer robust network of organized pores for energy storage and catalysis applications, but suffer from time‐consuming and intricate preparations hindering their widespread use. Here we report a new and rapid synthetic route for a N‐doped ordered mesoporous carbon structure through a preferential heating of iron oxide nanoparticles by microwaves. A nanoporous covalent organic polymer is first formed in situ covering the hard templates of assembled nanoparticles, paving the way for a long‐range order in a carbonaceous nanocomposite precursor. Upon removal of the template, a well‐defined cubic mesoporous carbon structure was revealed. The ordered mesoporous carbon was used in solid state hydrogen storage as a host scaffold for NaAlH4, where remarkable improvement in hydrogen desorption kinetics was observed. The state‐of‐the‐art lowest activation energy of dehydrogenation as a single step was attributed to their ordered pore structure and N‐doping effect.

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Section: Introductionmentioning

confidence: 99%

Rapid Access to Ordered Mesoporous Carbons for Chemical Hydrogen Storage

et al. 2021

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“…SEM microphotographs of studied carbon materials are depicted in Figure 3 . It can be seen that both carbon materials consist of nanoparticles with undisturbed rod-shaped morphology [ 21 ]. It confirms that no morphological changes occurred during dicyandiamide modification of pristine CMK-3-type carbon.…”

Section: Resultsmentioning

confidence: 99%

Modified Mesoporous Carbon Material (Pb-N-CMK-3) Obtained by a Hard-Templating Route, Dicyandiamide Impregnation and Electrochemical Lead Particles Deposition as an Electrode Material for the U(VI) Ultratrace Determination

et al. 2021

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In this paper, a dicyandiamide-impregnated mesoporous carbon (N-CMK-3), electrochemically modified in situ with lead film (Pb-N-CMK-3), was tested as an electrode material for U(VI) ultratrace determination. The prepared carbon material was characterized by XRD, SEM-EDX, Raman, FT-IR, XPS analysis and nitrogen sorption measurements. The changes of electrochemical properties of glassy carbon electrodes (GCE) after the N-CMK-3 and Pb-N-CMK-3 modification were studied using CV and EIS methods. The modification of the GCE surface by the N-CMK-3 material and Pb film increases the electroactive area of the electrode and decreases the charge transfer residence and is likely responsible for the electrochemical improvement of the U(VI) analytical signal. Using square-wave adsorptive stripping voltammetry (SWAdSV), two linear calibration ranges extending from 0.05 to 1.0 nM and from 1.0 to 10.0 nM were observed, coupled with the detection and quantification limits of 0.014 and 0.047 nM, respectively. The Pb-N-CMK-3/GCE was successfully applied for U(VI) determination in reference materials (estuarine water SLEW-3 and trace elements in natural water SRM 1640a).

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“…One of the main components of greenhouse gases is CO2 and it is significantly produced from anthropogenic sources and fossil fuel combustion (Creamer et al, 2016;Youn et al, 2011). Also, it is reported that CO2 contributes 60% of the total global warming caused by all greenhouse gases (Lakhi et al, 2016). For all these reasons, researchers pay attention to CO2 capture.…”

Section: Introductionmentioning

confidence: 99%

Investigation of ordered mesoporous carbon potential as low-cost CO2 adsorbent

2020

Global NEST: The International Journal

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<p>In this study, an investigation was carried out in order to determine the potential of ordered mesoporous carbon including high ratio sucrose in its composition as a CO2 adsorbent. Structural characterizations of silica and carbon material were determined by using a scanning electron microscope (SEM), N2 adsorption/desorption and X-ray diffraction (XRD) analysis. CO2 adsorption capacities of developed adsorbent at various temperatures (25°C, 35°C and 50°C) were determined by using a thermogravimetric analyzer under CO2 flow. The maximum adsorption capacity was obtained as approximately 2.27 mmol g CO2 g-1 adsorbent which was remained almost the same in the desorption process. The first order reaction kinetic model was well fitted with the experimental data. Arrhenius equation was used to calculate activation energy which was obtained as -2.86 kJ mol-1 indicating barrier-less type adsorption. Results showed that ordered mesoporous carbon could be a potential source for an efficient and low-cost adsorbent for CO2 capture.</p>

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Synthesis of mesoporous carbons with controlled morphology and pore diameters from SBA-15 prepared through the microwave-assisted process and their CO2 adsorption capacity

Cited by 53 publications

References 38 publications

Rapid Access to Ordered Mesoporous Carbons for Chemical Hydrogen Storage

Rapid Access to Ordered Mesoporous Carbons for Chemical Hydrogen Storage

Modified Mesoporous Carbon Material (Pb-N-CMK-3) Obtained by a Hard-Templating Route, Dicyandiamide Impregnation and Electrochemical Lead Particles Deposition as an Electrode Material for the U(VI) Ultratrace Determination

Investigation of ordered mesoporous carbon potential as low-cost CO2 adsorbent

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