Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

Elessawy, Noha A.; Gouda, Marwa H.; Elnouby, Mohamed; Zahran, Hoda Farouk; Hashim, Aly; El-Latif, Mona M. Abd; Santos, Diogo M.F.

doi:10.3390/app11199186

Cited by 13 publications

(6 citation statements)

References 40 publications

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“…The adsorbent was brought into contact with 50 ml dye solutions having concentrations ranging from 10 to 40 ppm, with the pH maintained at 7. 15,24,25 To facilitate the experiment, a single neck round bottom flask was placed on a magnetic stirrer at room temperature, and stirring was achieved using a magnetic bead. For UV analysis, the required amount of dye solution was collected at specific time intervals and transferred to test tubes.…”

Section: Resultsmentioning

confidence: 99%

The Impact of Titanium Nanotubes (TNTs) Incorporated into a Sodium Alginate-Based Nanocomposite Membrane on the Adsorption of Cationic Dye from Aqueous Solutions

Arla,

Godlaveeti,

Sana

et al. 2023

ECS J. Solid State Sci. Technol.

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In this study, we synthesized a composite membrane of molecularly imprinted TiO2 nanotubes (TNTs) embedded in a Sodium Alginate (SA) supporting matrix. The TNTs were synthesized using a simple hydrothermal technique, resulting in an average length of 20 nm. To improve their recyclability and photoactivity, these nanotubes were immobilized within the SA membrane. The casting solution was applied onto a glass plate using a glass rod to control the film thickness. Subsequently, the TNTs/SA nanocomposite membrane was obtained by drying at room temperature and crosslinking with glutaraldehyde and HCl to improve mechanical strength, chemical resistance and stability of the membrane. The as-prepared TNTs and composite films were characterized using various methods, including X-ray diffraction (XRD), Dynamic light scattering (DLS), Scanning electron microscopy (SEM), and Transmission electron spectroscopy (TEM). Scanning electron microscopy revealed the porous nature of the prepared TNTs/SA composite membrane. Further, these composite membranes were utilized for the adsorption of the cationic dye methylene blue (MB) from aqueous solutions. A 50 mg TNTs/SA nanocomposite membrane achieved an approximate degradation ratio of 85% for a 10 ppm MB concentration under room conditions within 180 min. Additionally, the effects of adsorbent dosage, dye concentration, and temperature were also investigated.

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Section: Resultsmentioning

confidence: 99%

The Impact of Titanium Nanotubes (TNTs) Incorporated into a Sodium Alginate-Based Nanocomposite Membrane on the Adsorption of Cationic Dye from Aqueous Solutions

Arla,

Godlaveeti,

Sana

et al. 2023

ECS J. Solid State Sci. Technol.

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“…40 The composites of SA/PVP/TiO 2 showed 98.9% deterioration of methylene blue dye in 120 min. 41 In light of the above discussion, the innovation of this study is to develop metal sulfide-based nanostructures involving no additional energy but utilizing biocompatible polymer gelbased materials, where the structures originate at the interface and progress deep within the gel phase by the gradual diffusion of reactant particles. These structures can result in hierarchical porosity along with a high surface area.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The Ag nanoparticles embedded in the SA/poly acrylamide polymer have been reported for excellent catalytic reduction of hazardous dyes . The composites of SA/PVP/TiO 2 showed 98.9% deterioration of methylene blue dye in 120 min …”

Section: Introductionmentioning

confidence: 99%

Sodium Alginate–CuS Nanostructures Synthesized at the Gel–Liquid Interface: An Efficient Photocatalyst for Redox Reaction and Water Remediation

2023

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The use of visible light to propel chemical reactions is an exciting area of study that is crucial in the current socioeconomic environment. However, various photocatalysts have been developed to harness visible light, which consume high energy during synthesis. Thus, synthesizing photocatalysts at gel–liquid interfaces in ambient conditions is of scientific importance. Herein, we report an environmentally benign sodium alginate gel being used as a biopolymer template to synthesize copper sulfide (CuS) nanostructures at the gel–liquid interface. The driving force for the synthesis of CuS nanostructures is varied by changing the pH of the reaction medium (i.e., pH 7.4, 10, and 13) to tailor the morphology of CuS nanostructures. The CuS nanoflakes obtained at pH 7.4 transform into nanocubes when the pH is raised to 10, and the nanostructures deform at the pH of 13. Fourier transform infrared spectroscopy (FTIR) confirms all the characteristic stretching of sodium alginate, whereas the CuS nanostructures are crystallized in a hexagonal crystal system, as revealed by the powder X-ray diffraction analysis. The high-resolution X-ray photoelectron spectroscopy (XPS) spectra show the +2 and −2 oxidation states of copper (Cu) and sulfur (S) ions, respectively. The CuS nanoflakes physisorbed a higher concentration of greenhouse CO2 gas. Owing to a lower band gap of CuS nanoflakes synthesized at a pH of 7.4, compared to other CuS nanostructures prepared at pH 10 and 13, CuS photocatalytically degrades 95% of crystal violet and 98% of methylene blue aqueous dye solutions in 60 and 90 min, respectively, under blue light illumination. Additionally, sodium alginate–copper sulfide (SA-CuS) nanostructures synthesized at a pH of 7.4 demonstrate excellent performance in photoredox reactions to convert ferricyanide to ferrocyanide. The current research opens the door to developing new photocatalytic pathways for a wide range of photochemical reactions involving nanoparticle-impregnated alginate composites prepared on gel interfaces.

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“…Metal oxide nanoparticles, such as, zinc oxide, titanium dioxide 17,18 , vanadium oxide, iron based oxides 19 , and tungsten oxide 20 are considered as; low cost materials, easy to produce and chemically stable. So, these nanomaterials are most candidates on various applications; including; water treatment 21 , antimicrobial 22 , sensors and much more.…”

Section: Introductionmentioning

confidence: 99%

Tungsten oxide, magnetic and Cu-doped magnetic nanoparticles mixtures with cyromazine as promising eco-friendly strategies to control of Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)

Eldesouky

Aseel

Elnouby

et al. 2023

Preprint

Self Cite

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Excessive application of pesticides leads to contamination of the environment, which entails the necessity to seek solutions that employ substances which do not pose ecological hazards. So, the present study was conducted to explore the different effects of tungsten oxide (WRT), magnetic nanoparticles (MNPs), Cu-doped magnetic nanoparticles (MNP-Cu), the insecticide, cyromazine, and their binary mixtures against Spodoptera littoralis. The nanomaterials individually didn’t show any toxicity against S. littoralis stages. Cyromazine recorded the highest toxicity with LC50 values of 58.7, 45.6, and 70.5 mgL− 1 against eggs, 2nd, and 4th larvae, respectively. Nanoparticles showed an antagonistic effect which increased directly with concentrations. Cyromazine (100 mgL− 1) + MNP-Cu (500 mgL− 1) was the most repellent mixture for the 2nd and 4th larvae with feeding deterrence percent, 41.42% and 57.60%, respectively. Larval and pupal durations increased with increasing cyromazine and nanomaterial concentrations. Except for the cyromazine (25 mgL− 1) + WRT (500 mgL− 1) mixture, which recorded 27.3% adult emergence, no adult emergence was recorded by the 500 mgL− 1 nanomaterial mixtures. Some malformations were also recorded for S. littoralis stages after being treated with tested materials. Cyromazine/MNP-Cu mixtures gave the highest significantly increased in the enzyme activity of glutathione S-transferase and α-esterase compared to the control. Regarding the results obtained by the Q-PCR, the insect immune response for the treatments indicated a high immune response in all the treated insects compared to the control. In conclusion, the nanomaterial-cyromazine mixtures may be recommended as promising alternatives for S. littoralis control.

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Novel Sodium Alginate/Polyvinylpyrrolidone/TiO2 Nanocomposite for Efficient Removal of Cationic Dye from Aqueous Solution

Cited by 13 publications

References 40 publications

The Impact of Titanium Nanotubes (TNTs) Incorporated into a Sodium Alginate-Based Nanocomposite Membrane on the Adsorption of Cationic Dye from Aqueous Solutions

The Impact of Titanium Nanotubes (TNTs) Incorporated into a Sodium Alginate-Based Nanocomposite Membrane on the Adsorption of Cationic Dye from Aqueous Solutions

Sodium Alginate–CuS Nanostructures Synthesized at the Gel–Liquid Interface: An Efficient Photocatalyst for Redox Reaction and Water Remediation

Tungsten oxide, magnetic and Cu-doped magnetic nanoparticles mixtures with cyromazine as promising eco-friendly strategies to control of Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae)

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