Renewable 4-HIF/NaOH aerogel for efficient methylene blue removal <i>via</i> cation–π interaction induced electrostatic interaction

Zhang, Longfei; Yang, Li; Xu, Yewei; Chang, Guanjun

doi:10.1039/c9ra04166d

Cited by 10 publications

(1 citation statement)

References 43 publications

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“…Aerogels can be prepared from a variety of sources, including inorganic materials (such as zirconia, titania, alumina, and silica), artificial polymers 30 (like PVC and formaldehyde), carbon-based materials 31 (such as carbon and graphene), polyimide, polystyrene, and polyurethane 32 . The surface of these aerogels can be modified using supercritical deposition (SFD), which involves the use of supercritical fluids maintained at a temperature and pressure beyond their critical point.…”

Section: Introductionmentioning

confidence: 99%

Preparation of graphene oxide-doped silica aerogel using supercritical method for efficient removal of emerging pollutants from wastewater

Sharma,

Ranjani,

Mamane

et al. 2023

Sci Rep

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Emerging pollutants and a large volume of unused dyes from the textile industry have been contaminating water bodies. This work introduces a scalable approach to purifying water by the adsorption of Acid green 25 (AG), Crystal Violet (CV), and Sulfamethoxazole (SMA) from an aqueous solution by graphene oxide (GO) doped modified silica aerogel (GO-SA) with supercritical fluid deposition (SFD) method. Characterization of GO-SA using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), high-resolution scanning electron microscopy (HR-SEM), thermogravimetric analysis (TGA), and Brunauer–Emmett–Teller (BET) adsorption isotherms revealed the improvement in the adsorbent surface area, and its textural properties. The high removal percentages observed in most of the experimental runs provide evidence of the excellent performance of the adsorbent towards the anionic and cationic dyes along with the antibiotic. The adsorption isotherm and kinetics showed that the Langmuir isotherm and pseudo-second-order kinetic models could explain adsorption. The adsorbent holds a higher adsorption capacity for SMA (67.07 mg g−1) than for CV (41.46 mg g−1) and AG (20.56 mg g−1) due to the higher hydrophobicity that interacts with the hydrophobic adsorbent. The GO-SA successfully removed AG, CV, and SMA with removal percentages of 98.23%, 98.71%, and 94.46%, respectively. The parameters were optimized using Central Composite Design (RSM-CCD). The prepared aerogel showed excellent reusability with a removal efficiency of > 85% even after 5 cycles. This study shows the potential of GO-SA adsorbent in textile and other wastewater purification.

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Section: Introductionmentioning

confidence: 99%

Preparation of graphene oxide-doped silica aerogel using supercritical method for efficient removal of emerging pollutants from wastewater

Sharma,

Ranjani,

Mamane

et al. 2023

Sci Rep

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An In Situ Coupling Strategy toward Porous Carbon Liquid with Permanent Porosity

Wang

Zhang

et al. 2021

Small

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An in situ coupling approach is used to fabricate the porous carbon liquid with permanent porosity by directly dispersing hollow carbon nanospheres in polymerized ionic liquids. It is a kind of homogenous and stable type III porous liquid at room temperature. Because of the well‐preserved permanent porosity, this unique porous carbon liquid is capable of absorbing the largest quantity of carbon dioxide than the reference PILs and solid carbon liquid, thus, can function as a promising candidate for application in gas storage. More importantly, this approach not only provides an easy method to tune the properties of those specific porous liquids, but also is suitable for fabricating other porous liquid based on varied porous structures (e.g., porous carbon nitride, porous boron nitride, and polymer with intrinsic microporosity), thus paving a viable path for the rational design and synthesis of novel porous liquids with functional properties for specific applications.

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Adsorption in the context of water purification

Ray

Gusain

Kumar

2020

Carbon Nanomaterial-Based Adsorbents for Water Purification

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Renewable 4-HIF/NaOH aerogel for efficient methylene blue removal via cation–π interaction induced electrostatic interaction

Abstract: A novel porous organic material 4-hydroxyindole-formaldehyde/NaOH (4-HIF/NaOH) aerogel was prepared via a facile polymerization, soaking in NaOH aqueous solution and ambient drying method.

Cited by 10 publications

References 43 publications

Preparation of graphene oxide-doped silica aerogel using supercritical method for efficient removal of emerging pollutants from wastewater

Preparation of graphene oxide-doped silica aerogel using supercritical method for efficient removal of emerging pollutants from wastewater

An In Situ Coupling Strategy toward Porous Carbon Liquid with Permanent Porosity

Adsorption in the context of water purification

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