Role of surfactant type on morphological, textural, optical, and photocatalytic properties of ZnO nanoparticles obtained by modified sol–gel

Soli, Jihen; Kachbouri, Sana; Elaloui, Elimame; Charnay, Clarence

doi:10.1007/s10971-021-05653-4

Cited by 10 publications

(12 citation statements)

References 61 publications

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“…In another study, various morphologies, such as flower-like nanorods, nanoflakes, assembled hierarchical structures, and nano granules were produced via the solvothermal method in the presence of oleic acid . Consequently, the type and amount of surfactant used in synthesis have been proven to be very influential on morphology, size, and optical properties such as band gap energies and photoluminescence …”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…21 Consequently, the type and amount of surfactant used in synthesis have been proven to be very influential on morphology, size, and optical properties such as band gap energies and photoluminescence. 22 Another issue that has come to the fore, especially in recent years, is that ZnO materials' optical, electrical, and catalytic performances vary according to their defect structures. 23−28 It has been known that excess zinc and oxygen vacancies form donor states at 0.05 eV below the conduction band.…”

Section: Introductionmentioning

confidence: 99%

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Impact on the Photocatalytic Dye Degradation of Morphology and Annealing-Induced Defects in Zinc Oxide Nanostructures

et al. 2023

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In this study, three different morphologies, nanoflower (NF), nano sponge (NS), and nano urchin (NU), of zinc oxide (ZnO) nanostructures were synthesized successfully via a mild hydrothermal method. After synthesis, the samples were annealed in the atmosphere at 300, 600, and 800 °C. Although annealing provides different degradation kinetics for different morphologies, ZnO NS performed significantly better than other morphologies for all annealing temperatures we used in the study. When the photoluminescence, electron paramagnetic resonance spectroscopy, BET surface, and X-ray diffraction analysis results are examined, it is revealed that the defect structure, pore diameter, and crystallinity cumulatively affect the photocatalytic activity of ZnO nanocatalysts. As a result, to obtain high photocatalytic activity in rhodamine B (RhB) degradation, it is necessary to develop a ZnO catalyst with fewer core defects, more oxygen vacancies, near band emission, large crystallite size, and large pore diameter. The ZnO NS-800 °C nanocatalyst studied here had a 35.6 × 10–3 min–1 rate constant and excellent stability after a 5-cycle photocatalytic degradation of RhB.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Impact on the Photocatalytic Dye Degradation of Morphology and Annealing-Induced Defects in Zinc Oxide Nanostructures

et al. 2023

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“…Table 1 shows the (200) preferential orientation-index α200 of the prepared films, and as observed, it practically does not present changes due to the effect of temperature increase, remaining at approximately 0.90, which shows that the orientation process was carried out from low temperatures and, once the material crystallized, the system tends to maintain that orientation. It is worth mentioning that when Pluronic F-127 acid is used, in some studies, it has been shown that it changes the size of the particles and their orientations [36][37][38][39][40][41][42][43], which is a very It is evident that the increment in the annealing temperature increases the crystallization of the films. At 600-650 • C, the broad peak centered at ~25-25.5 • is typical for the amorphous structure obtained by the xerogel formation by the sol-gel process [40].…”

Section: Chemical Evolution and Structural Propertiesmentioning

confidence: 99%

“…Table 1 shows the (200) preferential orientation-index α 200 of the prepared films, and as observed, it practically does not present changes due to the effect of temperature increase, remaining at approximately 0.90, which shows that the orientation process was carried out from low temperatures and, once the material crystallized, the system tends to maintain that orientation. It is worth mentioning that when Pluronic F-127 acid is used, in some studies, it has been shown that it changes the size of the particles and their orientations [36][37][38][39][40][41][42][43], which is a very desirable property for luminescent films since oriented films tend to minimize the scattering of light during emission process, therefore incrementing its quantum efficiency [44,45]. On the other hand, the crystallite size does not present a significant difference with the increment in the annealing temperature, as can be observed in Table 1.…”

Section: Chemical Evolution and Structural Propertiesmentioning

confidence: 99%

Luminescence Properties and Energy Transfer of Eu3+, Bi3+ Co-Doped LuVO4 Films Modified with Pluronic F-127 Obtained by Sol–Gel

et al. 2022

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Nowadays, orthovanadates are studied because of their unique properties for optoelectronic applications. In this work, the LuVO4:Eu3+, Bi3+ films were prepared by the sol–gel method, using a new simple route, and deposited by the dip-coating technique. The obtained films are transparent, fracture-free, and homogenous. The sol–gel process was monitored by Fourier-transform infrared spectroscopy (FTIR), and according to X-ray diffraction (XRD) results, the crystal structure was tetragonal, and films that were highly oriented along the (200) low-energy direction were obtained. The morphological studies by scanning electron microscopy (SEM) showed uniformly distributed circular agglomerations of rice-like particles with nanometric sizes. The luminescence properties of the films were analyzed using a fixed concentration of 2.5 at. % Eu3+ and different concentrations of Bi3+ (0.5, 1.0, and 1.5 at. %); all the samples emit in red, and it has been observed that the light yield of Eu3+ is enhanced as the Bi3+ content increases when the films are excited at 350 nm, which corresponds to the 1S0→3P1 transition of Bi3+. Therefore, a highly efficient energy transfer mechanism between Bi3+ and Eu3+ has been observed, reaching up to 71%. Finally, it was established that this energy transfer process occurs via a quadrupole–quadrupole interaction.

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Control Synthesis of Metallic Gold Decorated ZnO Nanoparticles for Photocatalytic Degradation of Rhodamine B, Methylene Blue and Eriochrome Black T Dyes

Soli,

Jraba,

Elaloui

2023

ChemistrySelect

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Pure ZnO and metallic gold (Au) decorated ZnO (Au‐ZnO) nanoparticles were prepared by a modified sol‐gel method employing (CTAB, C19H42BrN) as a cationic surfactant. XRD analysis shows the wurtzite hexagonal structure of pure ZnO and confirms the modification in the structure with the decoration of Au metal in ZnO. TEM characterization illustrates the dispersion of metallic gold on the hexagonal surface of ZnO which confirms the result obtained by XRD. The ZnO and Au‐ZnO nanoparticles had negative charge surface values (−16.7 eV) and (−36.6 eV) which enhance an excellent degradation for cationic dyes. Optical studies show that gap energy decreases from 3.19 eV to 3.11 eV upon the decoration of Au on ZnO surface. The decrease in photoluminescence intensity reflects the positive effects of the role of metallic Au on the photodegradation capacity of Au‐ZnO. Photocatalytic results show that Au‐ZnO exhibits a higher efficiencies degradation of 93 % (k=0.016 min−1) in the case of Rhodamine B and 73 % (k=0.001 min−1) of Methylene blue compared to pure ZnO. In the case of Eriochrome Black T, Au‐ZnO presents low degradation efficiency.

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Role of surfactant type on morphological, textural, optical, and photocatalytic properties of ZnO nanoparticles obtained by modified sol–gel

Cited by 10 publications

References 61 publications

Impact on the Photocatalytic Dye Degradation of Morphology and Annealing-Induced Defects in Zinc Oxide Nanostructures

Impact on the Photocatalytic Dye Degradation of Morphology and Annealing-Induced Defects in Zinc Oxide Nanostructures

Luminescence Properties and Energy Transfer of Eu3+, Bi3+ Co-Doped LuVO4 Films Modified with Pluronic F-127 Obtained by Sol–Gel

Control Synthesis of Metallic Gold Decorated ZnO Nanoparticles for Photocatalytic Degradation of Rhodamine B, Methylene Blue and Eriochrome Black T Dyes

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