Surface-functionalized silica aerogels and alcogels for methylene blue adsorption

Saad, Naim; Al-Mawla, Mazen; Moubarak, Elias; Al-Ghoul, Mazen; El-Rassy, Houssam

doi:10.1039/c4ra15504a

Cited by 57 publications

(22 citation statements)

References 38 publications

(66 reference statements)

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“…There has been interest in developing silica oxide (SiO 2 ) aerogels with large surfaces as a new class of adsorbents for the efficient removal of organic dyes from water [8][9]. The main drawback of the adsorption method is the transfer of organic dyes from an aqueous phase to a solid phase.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of silica–titania composite aerogel beads for the removal of Rhodamine B in water

Zhu

Liang

et al. 2015

RSC Adv.

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Silica-titania (SiO 2 -TiO 2 ) aerogel beads are synthesized by a single-step sol-gel reaction, followed by supercritical drying. The SiO 2 -TiO 2 aerogel beads consist of nanoparticles, which interconnect to form mesoporous networks. The TiO 2 nanoparticles distributed in the mesoporous networks have anatase phase. The SiO 2 -TiO 2 aerogel beads with large adsorption capacities and high photocatalytic activities can efficiently remove Rhodamine B (RhB) from water. They can be easily recovered from the reaction solution and retain excellent removal capabilities even after several successive adsorption-photodegradation cycles.

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Section: Introductionmentioning

confidence: 99%

Synthesis of silica–titania composite aerogel beads for the removal of Rhodamine B in water

Zhu

Liang

et al. 2015

RSC Adv.

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“…The various applications of phenyl functionalized adsorbent have been reported in recent literature [ 46 , 47 , 48 , 49 ]. However, the current work is unique in terms of the use of phenyl-PPH for dye adsorption, which is reported here for the first time.…”

Section: Resultsmentioning

confidence: 99%

The Application of Functionalized Pillared Porous Phosphate Heterostructures for the Removal of Textile Dyes from Wastewater

et al. 2017

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A synthesized functionalized pillared porous phosphate heterostructure (PPH), surface functionalized phenyl group, has been used to remove the dye Acid Blue 113 from wastewater. X-ray photoemission spectroscopy XPS and X-ray diffraction (XRD) were used to study its structure. The specific surface area of this was 498 m2/g. The adsorption capacities of PPH and phenyl surface functionalized (Φ-PPH) were 0.0400 and 0.0967 mmol/g, respectively, with a dye concentration of 10−5 M when well fitted with SIPS and Langmuir isotherms respectively (pH 6.5, 25 °C). The incorporation of the dye to the adsorbent material was monitored by the S content of the dye. It is suggested as an alternative for Acid Blue 113 remediation.

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“…Adsorption, by regarding the theory of classical physical chemistry, is a surface effect. Due to the different nature of the interaction between adsorbent and adsorbate, it is divided into two parts, physical and chemical adsorption [49]. The Van der Waals, VDW, forces are the main interaction for physical adsorption.…”

Section: Adsorption Mechanism Researchmentioning

confidence: 99%

Comparison of modified boehmite nanoplatelets and nanowires for dye removal from aqueous solution

Kamari¹,

Shafiee²,

Salimi³

et al. 2019

DWT

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a b s t r a c tIn this study, boehmite (-AlOOH) nanoplatelets and nanowires were synthesized at a pH of 5 and 12, respectively, modified with sulfonic acid (-AlOOH-SA5), (-AlOOH-SA12), and were used to adsorb eriochrome black T (EbT) dye solutions. Transmission electron microscopy, scanning electron microscopy, Fourier-transform infrared spectroscopy and X-ray diffraction were used to characterize the prepared nanoplatelets and nano wires. The effect of many parameters including initial concentration, pH and contact time was investigated. Values of 212.76 and 116.28 mg g -1 were, respectively, obtained for AlOOH-SA5 and AlOOH-SA12 for the adsorption maximum of EbT. Compared between two structures, the results indicated that the optimum conditions for 100 mg L -1 EbT solution were pH of 3 and 0.5 g L -1 AlOOH-SA5 as well as pH of 3 and 1 g L -1 AlOOH-SA12. Results of adsorption isotherms and adsorption kinetics indicated which they better matched by the Langmuir isotherm and also the adsorption kinetics better described by the pseudo-second-order model. Thermodynamic parameters have been measured, and results indicate that the adsorption process was spontaneous and exothermic for AlOOH-SA12 and nonspontaneous and endothermic for AlOOH-SA5. Finally, AlOOH-SA5 is a suitable adsorbent than that of AlOOH-SA12 and can be used for dye removal in wastewater treatment processes.

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Surface-functionalized silica aerogels and alcogels for methylene blue adsorption

Cited by 57 publications

References 38 publications

Synthesis of silica–titania composite aerogel beads for the removal of Rhodamine B in water

Synthesis of silica–titania composite aerogel beads for the removal of Rhodamine B in water

The Application of Functionalized Pillared Porous Phosphate Heterostructures for the Removal of Textile Dyes from Wastewater

Comparison of modified boehmite nanoplatelets and nanowires for dye removal from aqueous solution

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