Synthesis and effect of temperature on morphological and photoluminescence properties of TiO2 nanoparticles

Omri, K.; Alharbi, F. F.

doi:10.1007/s00339-019-2993-y

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…The inclusion of CNT into the PMMA matrix forms a number of intermolecular hydrogen bonds between OH groups of PMMA and CNT, which can alter the optical properties of the composites, including refractive index [ 25 ]. The wide emission band at 600 nm for the TiO 2 /PMMA freestanding film ( Figure 8 b) indicates defect states produced by radiative excitons recombination in TiO 2 [ 26 ]. The CQD/PMMA composite film PL emission spectrum ( Figure 8 c) exhibits a wide emission spectrum centered on 500 nm, suggesting CQD surface trap states [ 27 ].…”

Section: Results and Analysismentioning

confidence: 99%

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Optical and UV Shielding Properties of Inorganic Nanoparticles Embedded in Polymethyl Methacrylate Nanocomposite Freestanding Films

Adaikalam,

Vikraman,

Lee

et al. 2024

Polymers

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Polymethyl methacrylate (PMMA) is an interesting polymer employed in various applications due to its outstanding properties. However, its electrical and mechanical properties can be further improved by incorporating nanoparticles, and in particular, PMMA nanocomposite with nanoparticles provides various multifunctional properties. This work reports PMMA nanocomposite preparation and structural and optical characterizations incorporating carbon nanotubes (CNTs), TiO2 nanoparticles, and carbon quantum dots (CQDs). CNT/PMMA, TiO2/PMMA, and CQD/PMMA nanocomposite freestanding films were prepared using a simple solution method. Various properties of the prepared composite films were analyzed using scanning electron microscopy, X-ray diffraction, photoluminescence, Fourier transform infrared, and UV–Vis and Raman spectroscopy. Optical parameters and photocatalytic dye degradation for the films are reported, focusing on the properties of the materials. The CNT/PMMA, TiO2/PMMA, and CQD/PMMA films achieved, respectively, good electrical conductivity, photodegradation, and fluorescence compared with other composite films.

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Section: Results and Analysismentioning

confidence: 99%

“…Optical bandgaps for the composite materials can be extracted using the absorption spectrum since absorption for a material depends on electron excitation from the valence to the conduction band [ 26 ]. Thus, the absorption edge determines the material bandgap.…”

Section: Results and Analysismentioning

confidence: 99%

Optical and UV Shielding Properties of Inorganic Nanoparticles Embedded in Polymethyl Methacrylate Nanocomposite Freestanding Films

Adaikalam,

Vikraman,

Lee

et al. 2024

Polymers

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“…Nanocrystalline materials such as metals oxides [1][2][3], magnetite [4,5], and spinel ferrites [6][7][8][9][10] have enormous structures and suitable dielectric and magnetic properties for intelligent applications. Over the last decade, spinel ferrites attracted much attention due to their unique structural, elastic, dielectric and magnetic properties [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Effect of Zn2+ Substitution in Enrichment of Structural, Magnetic, and Dielectric Properties of Cobalt Ferrite

Maksoud

Elghandour

El-Sayyad

et al. 2020

J Inorg Organomet Polym

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This work reports the detailed structural characterization of Zn 2+ ion-substituted cobalt ferrite nanoparticles (CFO NPs; Co 1−x Zn x Fe 2 O 4 ; x = 0.00, 0.25, 0.50, and 0.75), prepared using a facile sol-gel method. It correlates structural changes with magnetic and dielectric properties. The as-synthesized samples were investigated by X-ray diffraction (XRD) analysis, BET surface area analyzer, energy-dispersive X-ray (EDX), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), vibrating sample magnetometer (VSM), Mössbauer spectroscopy, and impedance analyzer. The pristine sample (CFO) comprised of NPs with 25 nm size, which decreased up to 11 nm upon the formation of Zn 0.75 Co 0.25 Fe 2 O 4 . The N 2 adsorption-desorption isotherm of the prepared Zn 0.5 Co 0.5 Fe 2 O 4 sample confirmed the presence of a mesoporous structure. SEM images revealed that all prepared samples exhibited porous surface with honeycomb-like structures. The cationic distribution was described by Mössbauer spectra. The increment of Zn ions in the prepared samples resulted in sharp reduction of saturation magnetization and remanence values. The normal dielectric dispersion behavior was recorded and can be ascribed to the Maxwell-Wagner type polarization. Besides, the dielectric parameters varied by increasing Zn content in CFO NPs. This may be ascribed to O 2 vacancies and Fe 3+ ions in A-and B-sites. Dielectric studies revealed that, content of Zn ions beyond x = 0.25 was sufficient to reduce both dielectric constant and loss at low frequencies.

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“…Researchers have shown much interest in semiconductor nanomaterials with photodegradation performance for complete photo-degradation of organic and toxic compounds. [6][7][8][9][10][11][12][13][14] In 2 O 3 is an n-type compound with a wide bandgap energy of 3.0 eV that is broadly applied in various fields owing to its good optical and electrical properties, non-toxicity and high stability. [15] Tzu-Tsung Tseng et al investigated the synthesis of In 2 O 3 for photo-degradation of dye under UV irradiation.…”

Section: Introductionmentioning

confidence: 99%

“…However, metal oxide or sulfide nanomaterial‐based photocatalysis is the most effective method for organic compound degradation. Researchers have shown much interest in semiconductor nanomaterials with photo‐degradation performance for complete photo‐degradation of organic and toxic compounds . In 2 O 3 is an n‐type compound with a wide bandgap energy of 3.0 eV that is broadly applied in various fields owing to its good optical and electrical properties, non‐toxicity and high stability .…”

Section: Introductionmentioning

confidence: 99%

Graphene oxides as support for the synthesis of nickel sulfide–indium oxide nanocomposites for photocatalytic, antibacterial and antioxidant performances

Ashraf

Zhang

et al. 2019

Applied Organom Chemis

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NiS (nickel sulfide)–In2O3 (indium oxide) nanostructures and NiS–In2O3 decorated on graphene oxide (GO) were demonstrated by ultrasonic/hydrothermal method. The structural study demonstrates the preparation of bixbyite and hexagonal phase of In2O3 and NiS for all of the synthesized catalysts. The band gap of the synthesized catalyst was determined to be in the range of 2.30–3.00 eV. A morphological evaluation by field emission scanning electron microscopy of NiS–In2O3 decorated on graphene oxide shows support for the NiS–In2O3 on the graphene oxide layer. Different test parameters were performed to study the phase and morphology. The particle sizes of the In2O3, NiS–In2O3 and NiS–In2O3/GO nanocomposites were 56.0, 62.0 and 66.0 nm, respectively. The photocatalytic performance of NiS–In2O3/GO nanocomposites was examined for the degradation of methylene blue dye under a UV lamp. The prepared sample shows 98.25% photocatalytic degradation within 40 min and at pH 9. With the presence the NiS and GO, the photo‐degradation capacities of In2O3 and NiS–In2O3 are improved owing to the low band gap being calculated in UV–vis DRS analysis. The high ratio of NiS causes the highest photocatalytic properties of NiS–In2O3 nanocomposites owing to the enhancement of charge separation efficiency and generation of hydroxyl radicals. This study presents a facile and low‐cost method to prepare highly active NiS–In2O3/GO nanocomposites. The antibacterial data indicate the significant properties of NiS–In2O3/GO nanocomposites for this study.

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Synthesis and effect of temperature on morphological and photoluminescence properties of TiO2 nanoparticles

Cited by 12 publications

References 32 publications

Optical and UV Shielding Properties of Inorganic Nanoparticles Embedded in Polymethyl Methacrylate Nanocomposite Freestanding Films

Optical and UV Shielding Properties of Inorganic Nanoparticles Embedded in Polymethyl Methacrylate Nanocomposite Freestanding Films

Unveiling the Effect of Zn2+ Substitution in Enrichment of Structural, Magnetic, and Dielectric Properties of Cobalt Ferrite

Graphene oxides as support for the synthesis of nickel sulfide–indium oxide nanocomposites for photocatalytic, antibacterial and antioxidant performances

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