Molten salt synthesis of hierarchically porous carbon for the efficient adsorptive removal of sodium diclofenac from aqueous effluents

Youssef, Nadia A.; Amer, Ebtsam; Naga, Ahmed O. Abo El; Shaban, Seham A.

doi:10.1016/j.jtice.2020.07.018

Cited by 22 publications

(4 citation statements)

References 59 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…MCN and xMgO/MCN are depicted in Fig.3. The resultant spectra of the bare MCN demonstrated two signals located at approximately 1350 and 1580 cm −1 , which were designated to the disordered (D) and graphitic (G) modes of graphite analogous materials(Li et al 2010b;Abo El Naga et al 2018, Youssef et al 2020, Saied et al 2022. The Raman spectra of xMgO/MCN composites were similar to that of MCN.…”

mentioning

confidence: 86%

Mesoporous carbon nitride supported MgO for enhanced CO2 capture

Refaat

Sadgal

Naga

et al. 2023

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

The growing concern about the environmental consequences of anthropogenic CO2 emissions significantly stimulated the research of low-cost, efficient, and recyclable solid adsorbents for CO2 capture. In this work, a series of MgO-supported mesoporous carbon nitride adsorbents with different MgO contents (xMgO/MCN) was prepared using a facile process. The obtained materials were tested for CO2 capture from 10 vol% CO2 mixture gas with N2 using a fixed bed adsorber at atmospheric pressure. At 25 ºC, the bare MCN support and unsupported MgO samples demonstrated CO2 capture capacities of 0.99, and 0.74 mmol g−1, respectively, which were lower than those of the xMgO/MCN composites.The incorporation of MgO into the MCN improved the CO2 uptake, and the 20MgO/MCN exhibited the highest CO2 capture capacity of 1.15 mmol g−1 at 25 °C. The improved performance of the 20MgO/MCN nanohybrid can be possibly assigned to the presence of high content of highly dispersed MgO NPs along with its improved textural properties in terms of high specific surface area (215 m2g−1), large pore volume (0.22 cm3g−1), and abundant mesoporous structure. The efffects of temperature and CO2 flow rate were also investigated on the CO2 capture performance of 20MgO/MCN. Temperature was found to have a negative influence on the CO2 capture capacity of the 20MgO/MCN, which decreased from 1.15 to 0.65 mmol g−1with temperature rise from 25 C to 150º C, due to the endothermicity of the process. Similarly, the capture capacity decreased from 1.15 to 0.54 mmol g−1 with the increase of the flow rate from 50 to 200 ml minute−1 respectively. Importantly, 20MgO/MCN showed excellent reusability with consistent CO2 capture capacity over five sequential sorption–desorption cycles, suggesting its suitability for the practical capture of CO2.

show abstract

mentioning

confidence: 86%

Mesoporous carbon nitride supported MgO for enhanced CO2 capture

Refaat

Sadgal

Naga

et al. 2023

Environ Sci Pollut Res

Self Cite

View full text Add to dashboard Cite

show abstract

“…As for the HM-ZSM-5-x samples, the resultant N2 sorption isotherm is clearly different from that of the conventional microporous counterpart. It displayed a mixed type I-IV isotherms, illuminating that the synthesized HM-ZSM-5-x samples have a complex hierarchical porous structure containing micropores and mesopores (Figure 6(b-d)) [44][45][46]. Indeed, the isotherms unveil two N2 uptake steps; the first, in the low-pressure range, is fast and is attributed to micropore filling, and latter slower step, which was assigned to the presence of mesopores in the HM-ZSM-5-x materials.…”

Section: Catalyst Characterizationsmentioning

confidence: 98%

Xylene Isomerization using Hierarchically Mesoporous ZSM-5

El Fadaly,

Sayed,

Abo El Naga

et al. 2023

Bull. Chem. React. Eng. Catal.

Self Cite

View full text Add to dashboard Cite

The current study described the synthesis of H-ZSM-5 zeolites with hierarchical micro-meso- porosity (HM-ZSM-5-x) via the soft-templating route, employing organosilane surfactant, 3-[(trimethoxysilyl) propyl]octyldimethyl-ammonium chloride, as the mesoporous template. The catalytic performance was examined in the isomerization of o-xylene in a fixed-bed reactor at atmospheric pressure. Many techniques were conducted to characterize the catalysts. The X-ray diffraction (XRD) and Fourier Transform Infra Red (FTIR) results affirmed that all mesoporous zeolites possess the characteristic MFI structure, as well as good crystallinity. The N2 physisorption measurements signified that all HM-ZSM-5-x samples have higher surface areas and pore volumes than the micro-ZSM-5 sample, with the mesopores accounting for the vast majority of the total surface areas and pore volumes of HM-ZSM-5-x samples. Moreover, the mesoporosity of the obtained HM-ZSM-5-x zeolites can be simply tuned via the variation of the amount of TPOAC used. Compared with classical micro-ZSM-5, the HM-ZSM-5-0.15 sample possessed a higher o-xylene conversion and p-xylene yield that was attributed to its remarkable textural characteristics in terms of higher surface area and prevailing mesoporous character that led to a reduced diffusion limitation. Importantly, the catalyst manifested superb operational stability within 50 h, indicating high resistance against deactivation through coke deposition. Copyright © 2023 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

show abstract

“…The synergistic combination of different pore sizes (multimodal distribution) in HPCs makes them excellent adsorbents, which can adsorb from small molecules -such as caffeine, CO 2 and heavy metals -to larger molecules -such as humic acid and drugs. [43][44][45][46][47][48][49] According to Qi Changli et al, 44 the design and application of HPCs have attracted increasing attention in the last decade. The literature hypothesizes that micropores are retained for maximized spatial locations, mesopores provide fast mass transport pathways, and macropores can act as reservoirs to minimize diffusion distances.…”

Section: Biomassmentioning

confidence: 99%