TEMPO-oxidized cellulose nanofibers/TiO2 nanocomposite as new adsorbent for Brilliant Blue dye removal

Al‐Ahmed, Zehbah A.; Hassan, Abeer A.; El-Khouly, Sahar M.; El-Shafey, Shaymaa E.

doi:10.1007/s00289-019-03068-4

Cited by 23 publications

(5 citation statements)

References 34 publications

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“…Specifically, cellulosic materials with surface groups typically have two weight loss events, with the first weight loss event attributing to the surface charge group (i.e., the carboxyl group in this study) and the second weight loss event attributing to the hydroxyl group [46]. The weight loss pattern of corn stover-derived TEMPO-CNF in this study is similar to that of TEMPOoxidized bagasse pulp [47] and TEMPO-oxidized rice straw cellulose [34]. In addition, according to Figure 3a, TEMPO-CNF has a much broader exothermal peak than other samples.…”

Section: Dsc and Tga Characterizationsupporting

confidence: 50%

“…According to Figure 3b,c, at temperatures above 200 °C, TEMPOweight loss events, corresponding to two peaks in the DTG curve. Spec materials with surface groups typically have two weight loss events, wi loss event attributing to the surface charge group (i.e., the carboxyl gro and the second weight loss event attributing to the hydroxyl group [46 pattern of corn stover-derived TEMPO-CNF in this study is similar to oxidized bagasse pulp [47] and TEMPO-oxidized rice straw cellulose according to Figure 3a, TEMPO-CNF has a much broader exothermal samples. Specifically, TEMPO-CNF had a broad exothermal peak at aro other corn stover samples had a narrower peak at 338~363 °C.…”

Section: Dsc and Tga Characterizationmentioning

confidence: 72%

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Characterization and Antifungal Activity of Lemongrass Essential Oil-Loaded Nanoemulsion Stabilized by Carboxylated Cellulose Nanofibrils and Surfactant

Liu,

Fisher,

Friest

et al. 2023

Polymers

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Nanocellulose is an emerging green, biodegradable and biocompatible nanomaterial with negligible toxicities. In this study, a carboxylated nanocellulose (i.e., 2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TEMPO-CNF)) was prepared from corn stover and characterized by X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and differential scanning calorimetry (DSC)/thermogravimetric analysis (TGA). Corn stover-derived TEMPO-CNF was explored as an emulsion co-stabilizer together with Tween 80 for lemongrass essential oil-loaded emulsions. Droplet size, phase behavior and thermodynamic stability of oil-in-water emulsions stabilized by Tween 80 and TEMPO-CNF were investigated. The optimal nanoemulsion stabilized by this binary stabilizer could achieve a mean particle size of 19 nm, and it did not form any phase separation against centrifugal forces, freeze–thaw cycles and at least 30 days of room temperature storage. The nanoencapsulated essential oil had better inhibition activity against the mycelial growth of Aspergillus flavus than pure essential oil. Results from this study demonstrate the potential of using agricultural byproduct-derived nanomaterial as nanoemulsion stabilizers for essential oils with good emulsion thermodynamic stability as well as enhanced antifungal activities.

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Section: Dsc and Tga Characterizationsupporting

confidence: 50%

Section: Dsc and Tga Characterizationmentioning

confidence: 72%

Characterization and Antifungal Activity of Lemongrass Essential Oil-Loaded Nanoemulsion Stabilized by Carboxylated Cellulose Nanofibrils and Surfactant

Liu,

Fisher,

Friest

et al. 2023

Polymers

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“…Thus, functionalized polysaccharides are ideal candidates, especially when it comes to TEMPO-oxidized cellulose nanofibers (TOCNFs). They have been used for the highly efficient removal of Methylene Blue [ 196 , 197 ], Brilliant Blue [ 198 ], Basic Violet 1 and Rhodamine 6 g [ 199 ], or Toluidine Blue [ 200 ].…”

Section: Environmental Applications Of Materials Based On Selectively...mentioning

confidence: 99%

Selective Oxidation of Cellulose—A Multitask Platform with Significant Environmental Impact

Duceac¹,

Tanasă²,

Coseri³

2022

Materials

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Raw cellulose, or even agro-industrial waste, have been extensively used for environmental applications, namely industrial water decontamination, due to their effectiveness, availability, and low production cost. This was a response to the increasing societal demand for fresh water, which made the purification of wastewater one of the major research issue for both academic and industrial R&D communities. Cellulose has undergone various derivatization reactions in order to change the cellulose surface charge density, a prerequisite condition to delaminate fibers down to nanometric fibrils through a low-energy process, and to obtain products with various structures and properties able to undergo further processing. Selective oxidation of cellulose, one of the most important methods of chemical modification, turned out to be a multitask platform to obtain new high-performance, versatile, cellulose-based materials, with many other applications aside from the environmental ones: in biomedical engineering and healthcare, energy storage, barrier and sensing applications, food packaging, etc. Various methods of selective oxidation have been studied, but among these, (2,2,6,6-tetramethylpiperidin-1-yl)oxyl) (TEMPO)-mediated and periodate oxidation reactions have attracted more interest due to their enhanced regioselectivity, high yield and degree of substitution, mild conditions, and the possibility to further process the selectively oxidized cellulose into new materials with more complex formulations. This study systematically presents the main methods commonly used for the selective oxidation of cellulose and provides a survey of the most recent reports on the environmental applications of oxidized cellulose, such as the removal of heavy metals, dyes, and other organic pollutants from the wastewater.

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“…These groups often acquire a negative charge when in aqueous environments, which allows for the adsorption of positively charged cationic dye molecules through electrostatic interactions. In this regard, a variety of natural biomasses, such as bean gum polysaccharides [29], guar gum [30], chitosan [31], pectin [32], and cellulose [33], have been extensively utilized as adsorbents to capture cationic dye molecules from water. On the other hand, porous materials have shown unique advantages in dye adsorption due to their large specific surface area and channels that facilitate dye molecule transport, such as fast adsorption rates and high adsorption capacities [34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Porous Adsorbent with Multiple Amine Groups for Efficient and Selective Removal of Amaranth and Tartrazine Dyes from Water

Chen,

Liao,

Zeng

et al. 2024

Materials

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The development of an advanced dye adsorbent that possesses a range of beneficial characteristics, such as high adsorption capacity, swift adsorption kinetics, selective adsorption capability, and robust reusability, remains a challenge. This study introduces a facile method for fabricating an amine-rich porous adsorbent (ARPA), which is specifically engineered for the adsorptive removal of anionic dyes from aqueous solutions. Through a comprehensive assessment, we have evaluated the adsorption performance of ARPA using two benchmark dyes: amaranth (ART) and tartrazine (TTZ). Our findings indicate that the adsorption process reaches equilibrium in a remarkably short timeframe of just 20 min, and it exhibits an excellent correlation with both the Langmuir isotherm model and the pseudo-second-order kinetic model. Furthermore, ARPA has demonstrated an exceptional maximum adsorption capacity, with values of 675.68 mg g−1 for ART and 534.76 mg g−1 for TTZ. In addition to its high adsorption capacity, ARPA has also shown remarkable selectivity, as evidenced by its ability to selectively adsorb TTZ from a mixed dye solution, a feature that is highly desirable for practical applications. Beyond its impressive adsorption capabilities, ARPA can be efficiently regenerated and recycled. It maintains a high level of original removal efficiency for both ART (76.8%) and TTZ (78.9%) even after five consecutive cycles of adsorption and desorption. Considering the simplicity of its synthesis and its outstanding adsorption performance, ARPA emerges as a highly promising material for use in dye removal applications. Consequently, this paper presents a straightforward and feasible method for the production of an effective dye adsorbent for environmental remediation.

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TEMPO-oxidized cellulose nanofibers/TiO2 nanocomposite as new adsorbent for Brilliant Blue dye removal

Cited by 23 publications

References 34 publications

Characterization and Antifungal Activity of Lemongrass Essential Oil-Loaded Nanoemulsion Stabilized by Carboxylated Cellulose Nanofibrils and Surfactant

Characterization and Antifungal Activity of Lemongrass Essential Oil-Loaded Nanoemulsion Stabilized by Carboxylated Cellulose Nanofibrils and Surfactant

Selective Oxidation of Cellulose—A Multitask Platform with Significant Environmental Impact

Facile Fabrication of Porous Adsorbent with Multiple Amine Groups for Efficient and Selective Removal of Amaranth and Tartrazine Dyes from Water

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