Graphene oxide-mesoporous SiO2 hybrid composite for fast and efficient removal of organic cationic contaminants

Czepa, Włodzimierz; Pakulski, Dawid; Witomska, Samanta; Patroniak, Violetta; Ciesielski, Artur; Samorı́, Paolo

doi:10.1016/j.carbon.2019.11.091

Cited by 40 publications

(15 citation statements)

References 72 publications

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“…Table S5 shows that RHA-derived GO /SiO 2 nanocomposites have a substantially higher affinity for TB dye and BPA than other nanocomposites described in the literature. In addition, Furthermore, RHA-derived GO/SiO 2 nanocomposites have a substantially higher adsorption capacity and higher surface area than GO and/or its composites described in the literature 58 – 67 and Table 5 . Finally, the natural precursor of graphene nanocomposites, which were used in this study as low-cost adsorbents made by a chemical technique, provided an additional benefit.…”

Section: Resultsmentioning

confidence: 90%

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Controlled synthesis of graphene oxide/silica hybrid nanocomposites for removal of aromatic pollutants in water

Mohamed

El-Latif

Ibrahim

et al. 2022

Sci Rep

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The remarkable characteristics of graphene make it a model candidate for boosting the effectiveness of nano-adsorbents with high potential owing to its large surface area, π–π interaction, and accessible functional groups that interact with an adsorbate. However, the stacking of graphene reduces its influence adsorption characteristics and also its practical application. On the other hand, the widespread use of aromatic compounds in the industry has aggravated the contamination of the water environment, and how to effectively remove them has become a research hotspot. Herein, we develop the functionalization of silica nanoparticles on graphene oxide nanosheet (FGS) by a facile, cheap, and efficient synthesis protocol for adsorption of Trypan Blue (TB) and Bisphenol A (BPA). It was demonstrated that chemical activation with KOH at high autoclaving temperature successfully transformed rice husk ash (RHA) into FGS. The graphene oxide layered interlamination was kept open by using SiO2 to expose the interlayers' strong adsorption sites. XRD, EDX, FTIR, Raman spectroscopy, SEM, HR-TEM, and BET surface area are used to investigate the chemical composition, structure, morphology, and textural nature of the as-produced FGS hybrid nanocomposite. The various oxygen-containing functional groups of the hybrid nanocomposites resulted in a significantly increased adsorption capacity, according to experimental findings. In addition, FGS2, the best composite, has a specific surface area of 1768 m2g−1. Based on Langmuir isotherms, the maximal TB dye and BPA removal capacity attained after 30 min were 455 and 500 mg/g, respectively. The Langmuir isotherm model, a pseudo-second-order kinetic model, and an intraparticle diffusion model have all been used to provide mechanistic insights into the adsorption process. This suggests that BPA and TB adsorption on FGS2 is mostly chemically regulated monolayer adsorption. Due to its unique sp2-hybridized single-atom-layer structure, the exposed graphene oxide nanosheets' extremely hydrophobic effect, hydrogen bonding, and strong—electron donor–acceptor interaction contributed to their improved adsorption of BPA and TB. According to adsorption thermodynamics, FGS2 adsorption of TB and BPA is a spontaneous exothermic reaction that is aided by lowering the temperature. For adsorption-based wastewater cleanup, the produced nanocomposites with a regulated amount of carbon and silica in the form of graphene oxide and silica can be used. These findings suggest that functionalized GO/SiO2 hybrid nanocomposites could be a viable sorbent for the efficient and cost-effective removal of aromatic chemicals from wastewater.

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Section: Resultsmentioning

confidence: 90%

“…Thirdly, the enhanced adsorption of aromatic compounds onto the GO/SiO 2 was thought to be mostly due to – interactions 58 . GO possesses bonds and several hydroxyl groups on its surface, as previously stated.…”

Section: Resultsmentioning

confidence: 99%

Controlled synthesis of graphene oxide/silica hybrid nanocomposites for removal of aromatic pollutants in water

Mohamed

El-Latif

Ibrahim

et al. 2022

Sci Rep

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“…Nanoribbons of graphene were used in the adsorption of methylene blue and orange II dyes [12], in this case the maximum capacities, presented for the adsorbent, were of 280 and 265 mg/g, respectively. Others graphene-based materials had been recently used in the adsorption of crystal violet (69 mg/g) [13], rhodamine B (963 mg/g) [14], etc.…”

Section: Adsorbents and Organic Dyes: The Adsorption Resultsmentioning

confidence: 99%

Adsorption Processes in the Removal of Organic Dyes from Wastewaters: Very Recent Developments

López¹

2021

Promising Techniques for Wastewater Treatment and Water Quality Assessment

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The problem of the treatment of contaminated wastewaters is of the upmost worldwide interest. This contamination occurs via the presence of inorganic or organic contaminants of different nature in relation with the industry they come from. In the case of organic dyes, their environmental impact, and thus, their toxicity come from the air (releasing of dust and particulate matter), solid (scrap of textile fabrics, sludges), though the great pollution, caused from dyes, comes from the discharge of untreated effluents into waters, contributing to increase the level of BOD and COD in these liquid streams; this discharge is normally accompanied by water coloration, which low the water quality, and caused a secondary issue in the wastewater treatment. Among separation technologies, adsorption processing is one of the most popular, due to its versatility, easiness of work, and possibility of scaling-up in the eve of the treatment of large wastewater volumes. Within a miriade of potential adsorbents for the removal of organic dyes, this work presented the most recent advances in the topic.

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“…The 1 H, and 13 C NMR spectra were acquired, using Bruker AVANCE 300 wide bore spectrometer using deuterated chloroform as the solvent and internal standard. Fourier transform infrared (FTIR) spectra were recorded using an EQUINOX 55 (Bruker) spectrometer ranging from 4000 to 400 cm −1 .…”

Section: Characterizationmentioning

confidence: 99%

Dimethoxytriazine-Triazole Linked Mesoporous Silica Hybrid Sorbent for Cationic Dyes Adsorption

Jlassi

Abderrabba

Chehimi

2021

Preprint

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Organic dye has always been considered one of the most serious water pollutants. Therefore, the great significance nowadays is to synthesis effective adsorbent Materials for removal of these contaminants. Herein, we prepared successfully a novel sorbent based on dimethoxy-triazine/triazole groups functionalized via a 1,3-dipolar cycloaddition click reaction on mesoporous silica SBA-15. The resulting sample denoted DMT-Tr-SBA-15 was characterized by FTIR spectra, X-ray photoelectron spectroscopy (XPS), solid-state 13C NMR spectroscopy and nitrogen adsorption/desorption isotherm. The resulting hybrid silica material was evaluated as a sorbent for adsorption of four cationic dyes in aqueous media showed high adsorption efficiency and a fast removal rate. The adsorption properties were monitored versus time; the after 40 min and using a 40 mg/L of adsorbent was reached. The maximum adsorption capacity for methylene blue at room temperature and neutral pH was 4.59 mmol g-1. These results indicate the great potential of clickable mesoporous silica to diversify the active sites for adsorption, thus demonstrating a significant interest for environmental applications.

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Graphene oxide-mesoporous SiO2 hybrid composite for fast and efficient removal of organic cationic contaminants

Cited by 40 publications

References 72 publications

Controlled synthesis of graphene oxide/silica hybrid nanocomposites for removal of aromatic pollutants in water

Controlled synthesis of graphene oxide/silica hybrid nanocomposites for removal of aromatic pollutants in water

Adsorption Processes in the Removal of Organic Dyes from Wastewaters: Very Recent Developments

Dimethoxytriazine-Triazole Linked Mesoporous Silica Hybrid Sorbent for Cationic Dyes Adsorption

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