Surface modification of La/SnO<sub>2</sub>–TiO<sub>2</sub> nanocomposite via changing the ionic nature of surfactants

Farrukh, Muhammad Akhyar; Muneer, Iqra; Sharif, Sidra; Munawar, Zeeshan; Batool, Nuzhat

doi:10.1088/2053-1591/aadbf5

Cited by 5 publications

(4 citation statements)

References 33 publications

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“…XRD analysis data was used to calculate the crystallite size of nanocomposites at different 2θ values by using the Debye–Scherrer formula and the Williamsons–Hall method. The prominent peaks were taken into account to calculate crystallite size (D) by using Scherrer's equation, [ 33,44,67 ] as given in Equation :

D = \frac{kλ}{βcos θ}

where, k is the shape constant heaving 0.9 value for spherical particles,

λ

is wavelength of bombarded X‐ray (0.154 nm) and

β

is full width half maximum (FWHM) for peak at particular angle. The crystallite size calculated by the Scherrer equation was found to be 11.80 and 13.13 nm for Sm 2 O 3 /GO and Sm 2 O 3 /rGO nanocomposite, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…The dislocation density (

δ

) in nanocomposites was determined by using Equation 19 [ 67,69 ] :

δ = \frac{1}{D^{2}}

Dislocation density calculated in Sm 2 O 3 /GO and Sm 2 O 3 /rGO nanocomposites were 0.15 and 0.014 nm −1 , respectively. Dislocation density was increased with increasing strain value while decreasing crystallite size (Table 2).…”

Section: Resultsmentioning

confidence: 99%

“…[66] The other peaks at 28 , 30 XRD data was used to calculate the crystallite size of nanocomposites at different 2θ values by using the Debye-Scherrer formula and the Williamsons-Hall method. The prominent peaks were taken into account to calculate crystallite size (D) by using Scherrer's equation, [33,44,67] as given in Equation 17:…”

Section: X-ray Diffraction Analysismentioning

confidence: 99%

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Comparison of photocatalytic and antibacterial activities of allotropes of graphene doped Sm₂O₃ nanocomposites: Optical, thermal, and structural studies

Javaid

Farrukh

2022

J Chinese Chemical Soc

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This study mainly focuses on the synthesis of two allotropes of graphene, graphene oxide (GO) and reduced graphene oxide (rGO), by the modified Hummers' method and chemical reduction method, respectively. Sm 2 O 3 /GO and Sm 2 O 3 /rGO nanocomposites were further synthesized in the presence of the cationic surfactant CTAB via the sol-gel method followed by the reflux method. Synthesized nanocomposites were subjected to characterization by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and UV-Visible spectroscopy to explore structural, thermal, optical, and photocatalytic properties. Characteristic FTIR peaks were observed in nanocomposites, and the bond length of the Sm-O bond was calculated. The Coats-Redfern method was employed to calculate the kinetics and thermodynamic parameters. Hexagonal crystallite shapes of Sm 2 O 3 /GO and Sm 2 O 3 /rGO nanocomposites with 11.8 and 13.13 nm crystallite sizes and 3.9 and 2.5 eV optical band gaps were observed. The photocatalytic efficiency of Sm 2 O 3 /GO and Sm 2 O 3 /rGO nanocomposites was assessed against the degradation of methylene blue in the presence of sunlight, and its degradation was confirmed through FTIR. The antimicrobial activities were also performed against the bacterial strains Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus.

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D = \frac{kλ}{βcos θ}

where, k is the shape constant heaving 0.9 value for spherical particles,

λ

is wavelength of bombarded X‐ray (0.154 nm) and

β

Section: Resultsmentioning

confidence: 99%

“…The dislocation density (

δ

) in nanocomposites was determined by using Equation 19 [ 67,69 ] :

δ = \frac{1}{D^{2}}

Section: Resultsmentioning

confidence: 99%

Section: X-ray Diffraction Analysismentioning

confidence: 99%

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Comparison of photocatalytic and antibacterial activities of allotropes of graphene doped Sm₂O₃ nanocomposites: Optical, thermal, and structural studies

Javaid

Farrukh

2022

J Chinese Chemical Soc

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“…In order to delve further into the performance of the TiO 2 mediated photocatalytic degradation of the azo type organic dyes in aqueous effluents containing surfactants, the present work studies the TiO 2 catalyzed photoinduced degradation of the azo dye Disperse Red 1, in surfactant based microheterogenous systems, under irradiation with UV light. The experimental considerations of the study consider the use of synthesized and commercial samples of TiO 2 , supported on borosilicate rings (raschig rings) (40), where DR1 photodegradation efficiencies where tested in the presence of sodium dodecylsulfate, as model surfactant (41–43), at concentrations below, at and above the CMC. The behavior of the TiO 2 /SDS systems was studied in the presence of additives, such as H 2 O 2 , NaCl, Na 2 SO 4 , and Na 2 CO 3 , of reported influence over TiO 2 catalyzed photodegradation of organic molecules (44), to determine whether or not the presence of surfactant has any further effect on the influence of such additives on the photodegradation of the dye.…”

Section: Introductionmentioning

confidence: 99%

TiO₂ Photocatalyzed Degradation of the Azo Dye Disperse Red 1 in Aqueous Micellar Environments^†

Pino

Calderón

Castro

2020

Photochem & Photobiology

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The photoinduced degradation of the azo dye Disperse Red 1 was studied in a microheterogeneous system comprising titanium oxide (TiO2) and sodium dodecyl sulfate, exposed to UV light. Degussa P25, Anatase and TiO2 synthesized in acidic conditions were supported on raschig rings. The TiO2 photocatalyzed degradation is enhanced in the vicinity of the surfactant critical micelle value. Further increase on the surfactant concentration leads to a loss in photodegradation performance up to values equivalent to that observed without surfactant. Surfactant influence can be explained by two different phenomena taking place. The increasing concentration of surfactant leads to an increase in micellar concentration, inducing the incorporation of the dye to the hydrophobic moiety of the micelles, rendering the hydroxyl radical unable to interact with the dye. Similarly, the increased concentration of micelles at the photocatalyst/water interface might lead to a decrease in the number of active sites on the TiO2 surface able to either generate reactive species and/or interact with de dye molecules. Additives such as H2O2, NaCl, Na2SO4, and Na2CO3 are able to override the influence of the surfactant both positively and negatively, being the final outcome of the influence highly dependent on the crystalline form of the TiO2 photocatalyst.

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Recent advances in nanostructured Sn−Ln mixed-metal oxides as sunlight-activated nanophotocatalyst for high-efficient removal of environmental pollutants

Zinatloo-Ajabshir

Mousavi‐Kamazani

2021

Ceramics International

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Surface modification of La/SnO₂–TiO₂ nanocomposite via changing the ionic nature of surfactants

Cited by 5 publications

References 33 publications

Comparison of photocatalytic and antibacterial activities of allotropes of graphene doped Sm₂O₃ nanocomposites: Optical, thermal, and structural studies

Comparison of photocatalytic and antibacterial activities of allotropes of graphene doped Sm₂O₃ nanocomposites: Optical, thermal, and structural studies

TiO₂ Photocatalyzed Degradation of the Azo Dye Disperse Red 1 in Aqueous Micellar Environments^†

Recent advances in nanostructured Sn−Ln mixed-metal oxides as sunlight-activated nanophotocatalyst for high-efficient removal of environmental pollutants

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Surface modification of La/SnO2–TiO2 nanocomposite via changing the ionic nature of surfactants

Cited by 5 publications

References 33 publications

Comparison of photocatalytic and antibacterial activities of allotropes of graphene doped Sm2O3 nanocomposites: Optical, thermal, and structural studies

Comparison of photocatalytic and antibacterial activities of allotropes of graphene doped Sm2O3 nanocomposites: Optical, thermal, and structural studies

TiO2 Photocatalyzed Degradation of the Azo Dye Disperse Red 1 in Aqueous Micellar Environments†

Recent advances in nanostructured Sn−Ln mixed-metal oxides as sunlight-activated nanophotocatalyst for high-efficient removal of environmental pollutants

Contact Info

Product

Resources

About

Surface modification of La/SnO₂–TiO₂ nanocomposite via changing the ionic nature of surfactants

Comparison of photocatalytic and antibacterial activities of allotropes of graphene doped Sm₂O₃ nanocomposites: Optical, thermal, and structural studies

Comparison of photocatalytic and antibacterial activities of allotropes of graphene doped Sm₂O₃ nanocomposites: Optical, thermal, and structural studies

TiO₂ Photocatalyzed Degradation of the Azo Dye Disperse Red 1 in Aqueous Micellar Environments^†