Influence of optical band gap and particle size on the catalytic properties of Sm/SnO2–TiO2 nanoparticles

Javaid, Shaghraf; Farrukh, Muhammad Akhyar; Muneer, Iqra; Shahid, Maryam; Khaleeq-ur-Rahman, M.; Umar, Akrajas Ali

doi:10.1016/j.spmi.2015.01.038

Cited by 60 publications

(22 citation statements)

References 29 publications

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“…The bending vibrations at 470 and 660 cm −1 are due to Sn–O, while the peak at 680 cm –1 is due to Ti–O vibration and that at 578 cm −1 is attributed to the La–O bending vibration . The C=O stretching vibration is observed at 2337 cm −1 and C–H vibration is at 1643 cm −1 , and these peaks come from the CO 2 adsorbed on the surface . The high surface area and small particle size can be reasons for the adsorbed CO 2 .…”

Section: Resultsmentioning

confidence: 96%

“…:

α = 2.303 \frac{1000 ρ A}{l C M}

where ρ is theoretical density of lanthanum, l is length of the quartz cell, C is the molar concentration, and M is the molar mass of the synthesized material. The solution for the absorbance measurements was synthesized by sonicating 10 mg of La/SnO 2 ‐TiO 2 powder in 3 mL of deionized water for 4 h at room temperature . The optical bandgap was calculated by extrapolating the linear portion of plot between ( αhν ) 2 and hν on the y ‐ and x ‐axis, respectively.…”

Section: Resultsmentioning

confidence: 99%

“…Tin oxide‐titanium oxide nanomaterial was synthesized by a previously described method . Hydrothermal approach was used for the doping of lanthanum.…”

Section: Methodsmentioning

confidence: 99%

“…Calcination at a high temperature renders the material into single‐crystalline phase . For example, the anatase phase is obtained to an extent of 51.46% if calcination is carried out at 400°C, while only the rutile phase is obtained for calcination at 600°C . Tin oxide (SnO 2 ) is a transparent conducting material and possesses the rutile structure with a tetragonal lattice, with a 3.6 eV bandgap .…”

Section: Introductionmentioning

confidence: 99%

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Effect of Dielectric Constant of Solvents on the Particle Size and Bandgap of La/SnO₂‐TiO₂ Nanoparticles and Their Catalytic Properties

Farrukh

Muneer

Butt

et al. 2016

J Chinese Chemical Soc

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Lanthanum (La) supported on tin oxide‐titanium oxide (SnO2‐TiO2 ) nanoparticles were prepared by a sol–gel method followed by a hydrothermal method. Effect of different solvents (ethyl acetate, benzyl alcohol, ethylene glycol) on the particle size and catalytic activity was investigated. The nanomaterial was characterized by transmission electron microscopy, powder X‐ray diffraction, scanning electron microscopy, fourier transform infrared spectroscopy, and energy dispersive X‐ray. The catalytic and optical properties were studied using solid‐phase spectrophotometry and ultraviolet–visible spectroscopy, respectively. Gas chromatography‐mass spectrometry (GC‐MS) was used to detect the intermediates during the catalytic degradation of methylene blue. It was observed that with decrease in the dielectric constant (ε) of the solvent, the bandgap and particle size decrease and catalytic efficiency increases. Hence, the highest catalytic activity was observed with the solvent having the least dielectric constant.

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Section: Resultsmentioning

confidence: 96%

“…:

α = 2.303 \frac{1000 ρ A}{l C M}

Section: Resultsmentioning

confidence: 99%

“…Tin oxide‐titanium oxide nanomaterial was synthesized by a previously described method . Hydrothermal approach was used for the doping of lanthanum.…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Dielectric Constant of Solvents on the Particle Size and Bandgap of La/SnO₂‐TiO₂ Nanoparticles and Their Catalytic Properties

Farrukh

Muneer

Butt

et al. 2016

J Chinese Chemical Soc

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“…This observation is likely due to that at lower TiO 2 loading, and the size of the TiO 2 nanoparticles within the mesoporous is decreased as compared to that at higher TiO 2 loading. Moreover, the bandgap energy is affected by the quantum confinement and increases as the particles size decreases [40,41] 2. To identify the effects of UV on the MB molecule, a control experiment using 100 ml MB solution under UV irradiation without catalyst was carried out, shown in Figure 8(a).…”

Section: Adsorption Science and Technologymentioning

confidence: 99%

Photocatalytic Degradation of Methylene Blue and Antibacterial Activity of Mesoporous TiO₂-SBA-15 Nanocomposite Based on Rice Husk

Alosaimi

Alsohaimi

Dahan

et al. 2021

Adsorption Science & Technology

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Concerns have been increased regarding the existence of pollutants in environmental water resources and their risks to the ecosystem and human society. TiO2 photocatalyst is considered as an effective photocatalyst to remove the pollutants. Herein, the mesoporous TiO2-SBA-15 was prepared using the rice husk extract as the silica source. The fabricated nanocomposites were characterized using FTIR, small and wide angle XRD, Raman spectroscopy, UV-vis, BET surface area analysis, and HRTEM. The photocatalytic efficiency of the composites for the degradation of methylene blue (MB) has been evaluated under UV irradiation. Interestingly, due to the excellent dispersion of TiO2 on the wall of SBA-15 and good hydrophilicity, the nanocomposites displayed a good catalytic activity. The higher photodegradation performance was achieved by the composite containing 10 wt% TiO2 by which the MB was fully degraded within 15-20 min of irradiation. Besides, TiO2-SBA-15 could effectively inhibit the growth of Gram-positive and Gram-negative bacteria. These results offer a practical and economic approach in the environmental management industries.

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Facile synthesis of zwitterionic surfactant‐assisted molybdenum oxide/reduced graphene oxide nanocomposite with enhanced photocatalytic and antimicrobial activities

Ishtiaq

Farrukh

Rehman

et al. 2021

J Chinese Chemical Soc

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Reduced graphene oxide (rGO) was synthesized by chemical reduction method and molybdenum oxide (MoO 3 ) was synthesized by sol-gel method, separately. Molybdenum oxide/reduced graphene oxide (MoO 3 /rGO) nanocomposite was synthesized by sol-gel method followed by sonication method in the presence of zwitterionic surfactant, myristyl sulfobetaine (SB3-14) at its critical micelle concentration. The optical properties of nanocomposite were studied by calculating the bandgap. The average crystallite size of the nanocomposite was calculated as 22.16 nm using XRD. Direct allowed bandgap of MoO 3 /rGO nanocomposite was found 3.69 eV and its photocatalytic activity under the irradiation of sunlight showed 97.64% degradation against methylene blue. Antimicrobial activities were also checked against different bacterial strains.

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Influence of optical band gap and particle size on the catalytic properties of Sm/SnO2–TiO2 nanoparticles

Cited by 60 publications

References 29 publications

Effect of Dielectric Constant of Solvents on the Particle Size and Bandgap of La/SnO₂‐TiO₂ Nanoparticles and Their Catalytic Properties

Effect of Dielectric Constant of Solvents on the Particle Size and Bandgap of La/SnO₂‐TiO₂ Nanoparticles and Their Catalytic Properties

Photocatalytic Degradation of Methylene Blue and Antibacterial Activity of Mesoporous TiO₂-SBA-15 Nanocomposite Based on Rice Husk

Facile synthesis of zwitterionic surfactant‐assisted molybdenum oxide/reduced graphene oxide nanocomposite with enhanced photocatalytic and antimicrobial activities

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Influence of optical band gap and particle size on the catalytic properties of Sm/SnO2–TiO2 nanoparticles

Cited by 60 publications

References 29 publications

Effect of Dielectric Constant of Solvents on the Particle Size and Bandgap of La/SnO2‐TiO2 Nanoparticles and Their Catalytic Properties

Effect of Dielectric Constant of Solvents on the Particle Size and Bandgap of La/SnO2‐TiO2 Nanoparticles and Their Catalytic Properties

Photocatalytic Degradation of Methylene Blue and Antibacterial Activity of Mesoporous TiO2-SBA-15 Nanocomposite Based on Rice Husk

Facile synthesis of zwitterionic surfactant‐assisted molybdenum oxide/reduced graphene oxide nanocomposite with enhanced photocatalytic and antimicrobial activities

Contact Info

Product

Resources

About

Effect of Dielectric Constant of Solvents on the Particle Size and Bandgap of La/SnO₂‐TiO₂ Nanoparticles and Their Catalytic Properties

Effect of Dielectric Constant of Solvents on the Particle Size and Bandgap of La/SnO₂‐TiO₂ Nanoparticles and Their Catalytic Properties

Photocatalytic Degradation of Methylene Blue and Antibacterial Activity of Mesoporous TiO₂-SBA-15 Nanocomposite Based on Rice Husk