Structural, microstructural and photocatalytic degradation of methylene blue of zinc oxide and Fe-doped ZnO nanoparticles prepared by simple coprecipitation method

Roguai, Sabrina; Djelloul, A.

doi:10.1016/j.ssc.2021.114362

Cited by 36 publications

(26 citation statements)

References 64 publications

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“…Furthermore, chlorophyllin had high toxicity against Culex and Chaoborus (LD 50 = 6.88 and 24 mg/L, respectively [41]; LD 50 values of chlorophyllin were 2.34 and 5.88 mg/L against Aedes and Anopheles species, respectively [42] and a lethal dose of 8 mg per Chaoborus crystallinus larvae [43]. Chlorophyll derivatives can be effectively used against malaria, filarial, and dengue vector-borne diseases [44]. Echinochrome had high antibacterial, antiinflammatory [45] and antiviral effects [46].…”

Section: Discussionmentioning

confidence: 99%

Acaricide resistance and novel photosensitizing approach as alternative acaricides against the camel tick, Hyalomma dromedarii

Mohammed

Baz

Ibrahim

et al. 2022

Photochem Photobiol Sci

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The control of the camel tick, Hyalomma dromedarii is very crucial. This study evaluated the novel toxicity of photosensitizers and Phoxim insecticide against H. dromedarii males using the adult immersion tests. Ticks were subjected to sunlight for 10 min post-treatment (PT). The optical characters of the applied materials were determined by UV–Vis spectroscopy (250–900 nm wavelengths). The intensity of spectra decreased as dye concentration decreased. The optical bandgap energies of the dyes at different concentrations were not changed as the concentration changed and decreased as the absorption peak of individual dyes red-shifted. The mortalities 72 h PT reached 42.2%, 44.4%, 51.1%, 71.1%, 46.7%, 48.9%, 44.4%, and 55.6% for chlorophyllin, echinochrome, field stain, methylene blue, phthalocyanine, rhodamine 6G, riboflavin, and safranin, respectively. Methylene blue recorded the highest median lethal concentration (LC50 = 127 ppm) followed by safranin, field stain, rhodamine 6G, phthalocyanine, echinochrome riboflavin, and chlorophyllin (LC50 = 209, 251, 271, 303, 324, 332, and 362 ppm, respectively, 72 h PT). Their median lethal time, LT50, values PT with 240 ppm were 45, 87, 96, 72, 129, 115, 131, and 137 h, respectively. The relative toxicities of the LC50 values 72 h PT showed that chlorophyllin, echinochrome, field stain, methylene blue, phthalocyanine, rhodamine 6G, riboflavin, and safranin were 3.2, 3.6, 4.6, 9.1, 3.8, 4.3, 3.5, and 5.6 times, respectively, more effective than Phoxim. Methylene blue, safranin, and field stain showed a broad absorbance area indicating a large photoactivity and better phototoxicity and could be used as alternative agents to synthetic acaricides. Graphical Abstract

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Section: Discussionmentioning

confidence: 99%

Acaricide resistance and novel photosensitizing approach as alternative acaricides against the camel tick, Hyalomma dromedarii

Mohammed

Baz

Ibrahim

et al. 2022

Photochem Photobiol Sci

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“…In addition, there was a shift of the peak to a smaller angle in each Fe doped sample, indicating that the Fe dopant had been substituted into ZnO and partially replaced the position of the Zn 2+ ion. This is due to the effect of different ionic radii, where Fe 2+ ions are more prominent than Zn 2+ ions and show that the ZnO structure gradually degrades [7,18]. The peak indicates that the synthetic material is monophasic in all Fe content because there is no additional peak [21].…”

Section: Resultsmentioning

confidence: 98%

“…The peak indicates that the synthetic material is monophasic in all Fe content because there is no additional peak [21]. Bragg's law is used to study crystals from x-ray diffraction, where the greater the scattering angle, the smaller the distance between the fields, and vice versa [18]. The relationship between crystal size and the width of the x-ray diffraction peak is based on the Scherrer formula, namely [22]:…”

Section: Resultsmentioning

confidence: 99%

“…The crystal size of ZF before doping was 25.12 nm, then the crystal size obtained from adding Fe ions (2%, 4%, 8%, and 10%) through the Debye Scherrer equation was 20.03 nm -24.63 nm, which showed a decrease in crystal size. This result is due to an increase in lattice disturbance and strain caused by Fe 2+ substitution, which suppresses the growth of ZnO crystal grains [9,11] and is associated with decreased nucleation and growth rate because the ionic radius of Fe 2+ is higher than that of Zn 2+ ion [9,18]. An increase in crystal size was also observed but not substantially [11].…”

Section: Resultsmentioning

confidence: 99%

“…Then dried in the oven at 100 o C for 6 hours. The resulting powder was calcined in the furnace at a temperature of 600 o C for 2 hours, and then ground to produce finer particles [18]. For each doping measure, x=0, 0.02, 0.04, 0.06, 0.08 and 0.1 are symbolized by ZF, ZF2, ZF4, ZF6, ZF8 and ZF10.…”

Section: Experimental Methodsmentioning

confidence: 99%

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THE EFFECT OF ADDITIONAL IRON SAND ON THE CRYSTAL SIZE AND STRAIN OF ZnO

Lorna

Mutmainna

Tahir

et al. 2022

IPR

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This study observed the effect of the addition of iron (Fe) doping on the characteristics of Zinc Oxide (ZnO) nanoparticles.Zn(1-x)Fe(x) with various concentration of x = 0, 2, 4, 6, 8, and 10% was prepared by coprecipitation method using Sodium Hydroxide and Hydrogen Chloride. The effect of adding Fe doping on ZnO was characterized using X-ray Diffraction (XRD) to determine the crystal structure, size, and strain. The analysis result confirmed the absence of additional impurity peaks in the ZnO nanoparticles. Fe doping affects the Zn lattice structure. X-ray diffraction (XRD) study confirms the crystalline Hexagonal structure. Crystal size analysis using Debye Scherrer, UDM, and Halder-Wagner method obtained varying crystal sizes with variations in the concentration of Fe ranging from 19.89-44.72 nm. The crystal size and strain obtained from the Debye Scherrer method are smaller

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Photocatalytic Performance of Zinc Oxide and Metal‐Doped Zinc Oxide for Various Organic Pollutants

et al. 2023

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Zinc oxide (ZnO) has a high photocatalytic potential to decompose volatile organic pollutants into CO2 and H2O which depend on their physical properties, such as particle shape and size, band gap, type of dopant, and optical and structural properties. Using 93 references listed in this review, the relationship between metal dopant and synthesis methods to the efficiency of ZnO and composite ZnO‐metal in degrading pollutants for photocatalyst applications is studied. The basic principles of the photocatalyst process is described when the electrons at the valence band of ZnO get the energy from solar spectrum, generate the charge (electron and hole), and then continue to react with superoxide and water, resulting in radical atoms which break the bonds of organic pollutants. Rare earth dopants have the highest efficiency up to 100 % at 15 min irradiation. Conclusions and future prospects of ZnO and metal‐doped ZnO are also discussed. Perspectives and challenges of the future development of ZnO‐based photocatalysts are evaluated.

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Structural, microstructural and photocatalytic degradation of methylene blue of zinc oxide and Fe-doped ZnO nanoparticles prepared by simple coprecipitation method

Cited by 36 publications

References 64 publications

Acaricide resistance and novel photosensitizing approach as alternative acaricides against the camel tick, Hyalomma dromedarii

Acaricide resistance and novel photosensitizing approach as alternative acaricides against the camel tick, Hyalomma dromedarii

THE EFFECT OF ADDITIONAL IRON SAND ON THE CRYSTAL SIZE AND STRAIN OF ZnO

Photocatalytic Performance of Zinc Oxide and Metal‐Doped Zinc Oxide for Various Organic Pollutants

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