Synthesis of Li-doped ZnO via sol–gel process: structural, optical and photocatalytic properties

Ajala, F.; Lachheb, Hinda; Houas, Ammar

doi:10.1007/s10854-016-5863-9

Cited by 9 publications

(8 citation statements)

References 33 publications

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“…This was in good agreement with previously published work. 38,64,65 On the other hand, strong interactions between thiol groups and Fe explain the lower particles size on PET-SH, in agreement with previous data. 66 This was accompanied by the high density of Fe for PET-SH-Fe as compared to APTES and PAMAM graed nonwoven, due to the high affinity of S atoms towards Fe nanoparticles.…”

Section: Part 2: Analysis Of Heterogeneous Fenton-like Removal Of Crysupporting

confidence: 92%

“…Surface impurities in polyester membranes such as dust, spinning oil and contaminants were extracted by using a Soxhlet extraction method as described in our previous studies. 37,38 The removal of impurities was assessed by the water break test where surface tension of sample water (from PET rinsing bath) was compared with freshwater (72.6 mN m À1 ). 39 Aer that, twosteps surface modication of polyester membranes was conducted before the immobilization of iron particles.…”

Section: Plasma Treatment and Chemical Graing Of Pamam Aptes And Smentioning

confidence: 99%

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Modification of fibrous membrane for organic and pathogenic contaminants removal: from design to application

et al. 2020

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Section: Part 2: Analysis Of Heterogeneous Fenton-like Removal Of Crysupporting

confidence: 92%

Section: Plasma Treatment and Chemical Graing Of Pamam Aptes And Smentioning

confidence: 99%

Modification of fibrous membrane for organic and pathogenic contaminants removal: from design to application

et al. 2020

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“…[59] Besides, it is also reported by -Faten Ajala et al that Li dopant could be used to enhance the photocatalytic activity of metal oxide nanostructures. [60] The Li-ions in CuO leads to narrowing in the bandgap (See Figure 4g), absorption in the visible region gives higher optical activity that facilitates concentration of contaminants molecules at CuO surface, and enhances light sensitivity of CuO NPs. Also, Li doping improved electrical conduction (See Figure 5), enhanced surface area (see in FE-SEM 7TEM results in Figures 2 and 3) and had comparatively high recyclability (See Figure S6).…”

Section: Photocatalytic Activitymentioning

confidence: 99%

Lithium‐Doped CuO Nanosheets: Structural Transformation, Optical, and Electrical Characteristics with Enhanced Photocatalytic and Solar Cell Performance

Siddiqui

Qureshi

Haque

2020

Energy & Environ Materials

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Energy and environmental stuff are two of the main worries for humanity, and nanoscience plays a key role in providing the solution. Huge nano‐research activities have attracted lot of attention in the current scenario. However, designing the material with enhanced optoelectronic properties remains the foremost challenge. In the present work, the Li doped CuO nanosheets are synthesized by the chemical route and examined in photovoltaics and environmental remediation applications. The crystallographic and optical study reveals that crystallite size and bandgap decrease with an increase in lithium‐doping concentration up to 5 mole % and beyond that a reverse trend is observed. Additionally, impedance study has shown the significant contribution of lithium‐ions to the total capacitance and resistivity. Further, the photoactivity of Cu1−xLixO nanosheets (optimum concentration of Cu1−xLixO NSs (x = 0.05)) is projected to the degradation of methylene blue (MB) and used to fabricate bulk heterojunction solar cell together with P3HT and PCBM blend, respectively. The ITO/PEDOT:PSS/P3HT:PC70BM:Cu1−xLixO (x = 0.05)/LiF/Al solar cell realized higher power‐conversion efficiency η ˜ 3.91 than their corresponding pristine device η ˜ 2.98 with enhanced photocurrent density from 9.026 to 11.56 mA cm−2. The proliferation in photocatalysts and solar cells efficiency of Cu1−xLixO (x = 0.05) is mainly attributed to the higher light absorption and lesser electron‐hole recombination. The approach for the synthesis of Cu1−xLixO NSs as potential donor material and device prototypes fabricated is completely safe and cost‐effective.

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“…The effect of the lithium and sodium ions was only achieved using an excess of salts to zinc precursor (1:6 mol ratio). As reported in the literature, small amounts of lithium salt are used to provoke changes in size and shape [66][67][68][69]. Moreover, the solvation onto ZnO facets by alkaline metals like Li + , Na + , and K + has been pointed as an inhibitory factor to the growth leading to smaller crystallites [70].…”

Section: Lithium and Sodium As Capping Agentsmentioning

confidence: 98%

“…Lithium ions have been used as capping agents that enable interstitial zinc migration to the surface of the ZnO crystallite which leads to increase in size, high polydispersity and, in turn, aggregation in glycolic and sol-gel synthesis [66][67][68][69].…”

Section: Lithium and Sodium As Capping Agentsmentioning

confidence: 99%

Otimização da Rota Sintética Glicerol-Ureia para Produção de Nanopartículas

Brazuna¹

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Nanotechnology has a wide and interesting scientific and industrial potential in technological applications. In general terms, nanoparticle (NP) synthesis demands high temperatures, long reaction time and, expensive/toxic precursors. The main goal of this work is to optimize and expand NP synthesis from a glycerol-urea (GU) route. The GU route utilizes glycerol as a basic solvent and allows the use of additives (such as urea and other derivatives) in order to control the size and shape of the NPs. So as to produce metal oxide NPs (ZnO, CuO, and Fe3O4), different reaction parameters were modified during synthesis. X-ray diffraction (XRD), X-ray fluorescence spectroscopy (XRF) and transmission/scanning electron microscopy (TEM/SEM) were utilized as means of NPs characterization. The GU route promoted fast ZnO NPs formation (<1 hour) with high purity, with average purity of 99.8%. The ZnO NPs maintained their expected average size of 15 to 25 nm, with up to 10:1 glycerol:urea molar ratio. Higher proportion than 10:1 showed NPs without uniform particle size. The ratio of Zn 2+ /-OH above 1:4 lead to micrometric ZnO particles. Synthesis utilizing glycerol-water or, only glycerol, resulted in micrometric ZnO particles. The substitution of urea for acetone, thetramethylurea, and formamide yielded ZnO NPs with high crystallinity and uniform spherical morphology. The dimethylurea or water substitution leads to non-uniform micrometric particles, revealing the structural influence of the organic additive in nucleation process of NPs formation. Experiments for CuO and Fe3O4 showed no formation of metal oxide NPs, but nitrates or thiol complexes resulting from the urea reaction with copper and iron. CuO NPs were obtained only after calcination in a muffle oven, resulting in single monoclinic structure and nanometric crystallite size.

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Synthesis of Li-doped ZnO via sol–gel process: structural, optical and photocatalytic properties

Cited by 9 publications

References 33 publications

Modification of fibrous membrane for organic and pathogenic contaminants removal: from design to application

Modification of fibrous membrane for organic and pathogenic contaminants removal: from design to application

Lithium‐Doped CuO Nanosheets: Structural Transformation, Optical, and Electrical Characteristics with Enhanced Photocatalytic and Solar Cell Performance

Otimização da Rota Sintética Glicerol-Ureia para Produção de Nanopartículas

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