Green synthesis of a novel magnetic Fe3O4@SiO2/TiO2@WO3 nanocomposite for methylene blue removal under UV and visible light irradiations

VafaeiAsl, Mahdieh; Keshavarz, Iman; Shemirani, Farzaneh; Jamshidi, Parastoo

doi:10.1007/s11164-023-04963-2

Cited by 8 publications

(6 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Section: Resultsmentioning

confidence: 99%

“…Further, the investigators have used this nanocomposite for the remediation of MB dye under both UV light and visible light. Investigators have used different ratios of TiO 2 @WO 3 to Fe 3 O 4 @ SiO 2 with a photocatalytic degradation efficiency of about 92.77% under optimized conditions (VafaeiAsl et al, 2023). The antibacterial activity of the B. subtilis MTCC 8322 synthesized TiO 2 NPs was assessed by using different aqueous solutions of the TiO 2 NPs against Gram-positive bacteria (GPB) (B. subtilis MTCC 8322) and Gram-negative bacteria (GNB) (E. coli 8933) in nutrient agar media.…”

Section: Mechanism Of Photocatalytic Degradation Of Dyes On the Surfa...mentioning

confidence: 99%

See 1 more Smart Citation

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

Rathore,

Yadav,

Amari

et al. 2024

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

Over the last decade there has been a huge increase in the green synthesis of nanoparticles. Moreover, there is a continuous increase in harnessing the potential of microorganisms for the development of efficient and biocompatible nanoparticles around the globe. In the present research work, investigators have synthesized TiO2 NPs by harnessing the potential of Bacillus subtilis MTCC 8322 (Gram-positive) bacteria. The formation and confirmation of the TiO2 NPs synthesized by bacteria were carried out by using UV-Vis spectroscopy, Fourier transforms infrared (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM), and energy dispersive X-ray spectroscopy (EDX/EDS). The size of the synthesized TiO2 NPs was 80–120 nm which was spherical to irregular in shape as revealed by SEM. FTIR showed the characteristic bands of Ti-O in the range of 400–550 cm−1 and 924 cm−1 while the band at 2930 cm−1 confirmed the association of bacterial biomolecules with the synthesized TiO2 NPs. XRD showed two major peaks; 27.5° (rutile phase) and 45.6° (anatase phase) for the synthesized TiO2 NPs. Finally, the potential of the synthesized TiO2 NPs was assessed as an antibacterial agent and photocatalyst. The remediation of Methylene blue (MB) and Orange G (OG) dyes was carried out under UV- light and visible light for a contact time of 150–240 min respectively. The removal efficiency for 100 ppm MB dye was 25.75% and for OG dye was 72.24% under UV light, while in visible light, the maximum removal percentage for MB and OG dye was 98.85% and 80.43% respectively at 90 min. Moreover, a kinetic study and adsorption isotherm study were carried out for the removal of both dyes, where the pseudo-first-order for MB dye is 263.269 and 475554.176 mg/g for OG dye. The pseudo-second-order kinetics for MB and OG dye were 188.679 and 1666.667 mg/g respectively. In addition to this, the antibacterial activity of TiO2 NPs was assessed against Bacillus subtilis MTCC 8322 (Gram-positive) and Escherichia coli MTCC 8933 (Gram-negative) where the maximum zone of inhibition in Bacillus subtilis MTCC 8322 was about 12 mm, and for E. coli 16 mm.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Mechanism Of Photocatalytic Degradation Of Dyes On the Surfa...mentioning

confidence: 99%

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

Rathore,

Yadav,

Amari

et al. 2024

Front. Bioeng. Biotechnol.

View full text Add to dashboard Cite

show abstract

“…Many efforts have been made to eliminate contaminants from the water. Recently, photocatalysis technology was investigated for removing organic dyes from water because of its mild reaction conditions, low price, cleanliness, and high efficiency [2,3]. Budnyak et al [4] synthesised the photoactive lignin/Bi 4 O 5 Br 2 /BiOBr bioinorganic complex site and found that 18.9% of Bi 4 O 5 Br 2 /BiOBr exhibited photocatalytic degradation capabilities towards cationic methylene blue and Rhodamine B (RhB) dyes under 20 W blue light irradiation.…”

Section: Introductionmentioning

confidence: 99%

“…Graphite carbon nitride (g-C 3 N 4 ) has generated considerable interest as a metal-free photocatalyst because of its straightforward and affordable synthesis; energy bandwidth for solar power collection; thermal stability; trustworthy chemical inertness; and electrochemical, multipurpose, and nicely organised photocatalytic characteristics [15][16][17]. g-C 3 N 4 has the in-plane tri-s-triazine units, and the sp 2 -hybridised carbon and nitrogen form a πconjugated system, advantageous for modifying materials based on nanosheets in electrical and optical electronics [18,19]. g-C 3 N 4 has good photocatalytic performance because of the narrow band gap and capacity to take in light that is visible, which can effectively absorb and use the light of wavelengths below 460 nm [20].…”

Section: Introductionmentioning

confidence: 99%

Thermal Polymerisation Synthesis of g-C3N4 for Photocatalytic Degradation of Rhodamine B Dye under Natural Sunlight

Zhang

Xing

Dong

et al. 2023

Water

View full text Add to dashboard Cite

The photocatalytic performance of g-C3N4 materials prepared by different precursors for Rhodamine B (RhB) dye degradation was studied. Their crystal structure, morphologies, chemical compositions, functional groups, and optical and photoelectrochemical performances of prepared g-C3N4 were analysed and characterised using X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, UV-Vis diffuse reflectance spectra, photoluminescence, and electrochemical workstations. The degradation of RhB dye in the presence of visible light and sunlight was utilised to assess the photocatalytic efficiency of the g-C3N4 photocatalyst. The results of the photocatalytic comparison experiment showed that the g-C3N4 photocatalyst prepared with urea as a precursor (UCN) has the best photocatalytic performance, achieving 99.61% removal in 40 min. In addition, the photocatalyst UCN can completely degrade 10 mg/L RhB dye within 20 min under sunlight, demonstrating its potential for practical applications under natural sunlight conditions. After four cycles, the degradation rate remains above 99%, demonstrating excellent stability and reusability. Due to its lower average pore number, larger BET-specific surface area and volume of pores, UCN provides more activity spaces and facilitates the adsorption of pollutant molecules, thereby enhancing photocatalytic activity. It was established through the active substance trapping studies that the main reactive species involved in the photocatalytic degradation process of RhB dye is •O2−. This study showed that g-C3N4 synthesised with urea as the precursor has better photocatalytic performance in the degradation of RhB dye.

show abstract

“…Nanoparticles are prime materials possessing a high surface area to volume ratio, small particle size ranging from 1-100 nm, and high surface energies and are thus utilized in a wide range of scientific areas, but when they are used in a pure form, they tend to agglomerate very quickly [7]. So, this problem could be overcome by developing a nanocomposite in which nanoparticles are supported within the interlamellar spaces of polymer/clay or by another metal matrix on their external surfaces [8,9]. In the domain of modern science and technology, various nanocomposite compounds having multifunctional properties are being developed and applied in the sectors of energy, electronics, biomedicine, biotechnology, and wastewater treatment [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue from Aqueous Solutions by Using Nano-ZnO/Kaolin-Clay-Based Nanocomposite

Modi,

Yadav,

Ali

et al. 2023

Water

View full text Add to dashboard Cite

Dyes are toxic organic compounds released as effluent from various industries that need proper treatment as they pose serious hazards to the environment and living beings, including humans. Nanocomposites can be employed as photocatalysts for the elimination of such organic compounds from wastewater. One such attempt is made in this present research study, where a zinc-based nanocomposite has been fabricated for the elimination of the methylene blue dye (MB). For the development of nanocomposite, zinc oxide nanoparticles (ZnONPs) were prepared to utilize Allium sativa peel (garlic skin) extract, which was further processed to develop ZnO/kaolin clay NC. ZnONPs and ZnO/kaolin clay NC formation have been confirmed by UV–Vis spectral bands at 379 nm and 423 nm. The NC was rod-shaped, with width of 60–100 nm and length of 200–800 nm and an average size of 50.0 ± 0.58 nm. Both materials were compared for their efficacy in photocatalytic degradation of the MB under solar light irradiation. ZnONPs removed 65% of MB, whereas the degradation efficiency of ZnO/clay NC was calculated to be 96% for 10 ppm MB. A kinetics study for photocatalytic degradation of MB using both nanomaterials showed that the photocatalytic degradation followed the pseudo-first-order (PFO) type of reaction. This investigation represents an expeditious, lucrative, ecological, and appropriate technique for the fabrication of functional nanomaterials for the remediation of diverse organic pollutants.

show abstract

Green synthesis of a novel magnetic Fe3O4@SiO2/TiO2@WO3 nanocomposite for methylene blue removal under UV and visible light irradiations

Cited by 8 publications

References 65 publications

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

Synthesis and characterization of titanium dioxide nanoparticles from Bacillus subtilis MTCC 8322 and its application for the removal of methylene blue and orange G dyes under UV light and visible light

Thermal Polymerisation Synthesis of g-C3N4 for Photocatalytic Degradation of Rhodamine B Dye under Natural Sunlight

Photocatalytic Degradation of Methylene Blue from Aqueous Solutions by Using Nano-ZnO/Kaolin-Clay-Based Nanocomposite

Contact Info

Product

Resources

About