Pyrophyllite clay-derived porous geopolymers for removal of methylene blue from aqueous solutions

Ettahiri, Youssef; Bouna, Lahcen; Hanna, John V.; Benlhachemi, A.; Pilsworth, Hannah L.; Bouddouch, A.; Bakiz, B.

doi:10.1016/j.matchemphys.2022.127281

Cited by 23 publications

(5 citation statements)

References 53 publications

(82 reference statements)

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“…The role of initial pH in practical applications is crucial to the degradation of organic pollutants. To this end, various pH tests in a range of (3)(4)(5)(6)(7)(8)(9)(10)(11) were conducted on the CoCN-NaBH 4 /PMS system, as depicted in Fig. 9d.…”

Section: Materials Advances Papermentioning

confidence: 99%

“…[1][2][3] Such pollution results from the intensive development of chemical industries, which is the primary culprit behind the environmental degradation by organic dye pollutants. [4][5][6][7][8] In the last few years, numerous scientific papers have been published with the aim of finding solutions to this environmental contamination problem. [9][10][11][12][13][14][15][16] Despite this vast scientific production, researchers in the field are still not satisfied with the results.…”

Section: Introductionmentioning

confidence: 99%

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Novel chemically reduced cobalt-doped g-C₃N₄ (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Ben Hamou,

Enneiymy,

Farsad

et al. 2024

Mater. Adv.

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Section: Materials Advances Papermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Novel chemically reduced cobalt-doped g-C₃N₄ (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Ben Hamou,

Enneiymy,

Farsad

et al. 2024

Mater. Adv.

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“…Huan Gao et al, [11] applied porous geopolymer in building thermal insulation. Moreover, pyrophyllite clay based porous geopolymers was studied and used for removal of methylene blue from aqueous solutions [12,13]. Industrial wastewater containing heavy metals was also adsorbed by steel slag-based porous geopolymer for copper and lead removal because of mesoporous geopolymer material [14,15].…”

Section: Introductionmentioning

confidence: 99%

Fast microwave synthesis of high-silica natural soil based porous geopolymer

TOOBPENG,

JIEMSIRILERS

2024

J Met Mater Miner

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This study describes a simple microwave process for fabricating porous geopolymer-polymer based Shirasu soil. The porous geopolymer samples were synthesized using sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) solution as alkaline solution in range of 0.5 M to 9 M. After mixing process, the geopolymer slurry was heated and stimulated geopolymerization reaction by different microwave powers at 200 W, 500 W and 700 W for 30 s, 60 s, 90 s and 120 s. The influence of NaOH concentration, microwave powers and heating times on the apparent bulk density, the water adsorption was focused. Results showed that the microwave powers and heating time affected the apparent bulk density, the water adsorption, and the densification of geopolymer matrix. Higher microwave power can promote higher water adsorption related to lower apparent bulk density. Moreover, the results revealed that the porosity and the nitrogen adsorption of geopolymers at 120 s of heating time increased with an increment of the NaOH from 1 M to 4 M. On the other hand, geopolymers activated by 200 W at 30 s could not be hardened. This work provides the feasibility of porous geopolymer synthesis based natural soil.

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“…Porous geopolymers have advantages, such as a nanoscale size, large volume pores and large specific surface area, compare with dense geopolymers [ 30 ]. The advantage of geopolymers compared to raw clays and other classic adsorbents is their high mechanical resistance, chemical and thermal stability, allowing their regeneration and recycling [ 31 ]. Among the methods to obtain porous polymers are self-forming, direct foaming, adding filler and particles stacking methods [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

“…In previous studies it has been determined that porous geopolymers can be used to remove MB dye from aqueous solutions and wastewaters [ 31 , 32 , 33 , 34 , 37 ], however, the efficiency of dye removal can be increased by working with porous geopolymer composites filled with a semiconductor that helps photodegradation of the dye [ 30 ]. In this context, in a recent study it was shown that the photocatalyst ZnTiO 3 /TiO 2 is an efficient compound for the removal of MB dye [ 38 ].…”

Section: Introductionmentioning

confidence: 99%

Porous Geopolymer/ZnTiO3/TiO2 Composite for Adsorption and Photocatalytic Degradation of Methylene Blue Dye

et al. 2023

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In this study, GP (geopolymer) and GTA (geopolymer/ZnTiO3/TiO2) geopolymeric materials were prepared from metakaolin (MK) and characterized by X-ray diffraction (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM), energy dispersive X-rays (EDX), specific surface area (SSA), and point of zero charge (PZC). The adsorption capacity and photocatalytic activity of the compounds prepared in the form of pellets was determined by degradation of the methylene blue (MB) dye in batch reactors, at pH = 7.0 ± 0.2 and room temperature (20 °C). The results indicate that both compounds are highly efficient at adsorbing MB, with an average efficiency value of 98.5%. The Langmuir isotherm model and the pseudo second order kinetic model provided the best fits to the experimental data for both compounds. In the MB photodegradation experiments under UVB irradiation, GTA reached an efficiency of 93%, being higher than that achieved by GP (4%). Therefore, the incorporation of ZnTiO3/TiO2 in the geopolymeric matrix allowed GTA to achieve higher overall efficiency, by combining adsorption and photocatalysis, compared to the GP compound. The results indicate that the synthesized compounds could be used for up to five consecutive cycles for the removal of MB from wastewater through adsorption and/or photocatalysis processes.

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Pyrophyllite clay-derived porous geopolymers for removal of methylene blue from aqueous solutions

Cited by 23 publications

References 53 publications

Novel chemically reduced cobalt-doped g-C₃N₄ (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Novel chemically reduced cobalt-doped g-C₃N₄ (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Fast microwave synthesis of high-silica natural soil based porous geopolymer

Porous Geopolymer/ZnTiO3/TiO2 Composite for Adsorption and Photocatalytic Degradation of Methylene Blue Dye

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Pyrophyllite clay-derived porous geopolymers for removal of methylene blue from aqueous solutions

Cited by 23 publications

References 53 publications

Novel chemically reduced cobalt-doped g-C3N4 (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Novel chemically reduced cobalt-doped g-C3N4 (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Fast microwave synthesis of high-silica natural soil based porous geopolymer

Porous Geopolymer/ZnTiO3/TiO2 Composite for Adsorption and Photocatalytic Degradation of Methylene Blue Dye

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Novel chemically reduced cobalt-doped g-C₃N₄ (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation

Novel chemically reduced cobalt-doped g-C₃N₄ (CoCN-x) as a highly heterogeneous catalyst for the super-degradation of organic dyes via peroxymonosulfate activation