The influence of Zn and Mg doping on the structural and optical properties of NiO nano-structures for optoelectronic applications

Ahmed, Abdullah Ahmed Ali; Alahsab, Enas Ali Ahmed; Abdulwahab, A.M.

doi:10.1016/j.rinp.2021.103938

Cited by 40 publications

(13 citation statements)

References 47 publications

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“…Panigrahi et al 26 has investigated the effect of Mg and Zn doping on NiO nanoparticles by changing the ratio of dopant and the pure NiO exhibited cubic phase. According to the Panigrahi's report, the parameters of both bond length and lattice parameters exhibited increase with the increase in the ratio of metal dopant [26][27][28] . According to the above mentioned literature, the main dopant of Mo is responsible for the crystal structure observed in case of the doped NiO NPs.…”

Section: Resultsmentioning

confidence: 98%

Effect of Mo doping in NiO nanoparticles for structural modification and its efficiency for antioxidant, antibacterial applications

Alam

BaQais

Mir

et al. 2023

Sci Rep

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Novel molybdenum (Mo)-doped nickel oxide (NiO) Nanoparticles (NPs) were synthesized by using a simple sonochemical methodology and the synthesized NPs were investigated for antioxidant, and antibacterial applications. The X-ray diffraction (XRD) analysis revealed that the crystal systems of rhombohedral (21.34 nm) and monoclinic (17.76 nm) were observed for pure NiO and Mo-doped NiO NPs respectively. The scanning electron microscopy (SEM) results show that the pure NiO NPs possess irregular spherical shape with an average particle size of 93.89 nm while the Mo-doped NiO NPs exhibit spherical morphology with an average particle size of 85.48 nm. The ultraviolet–visible (UV–Vis) spectrum further indicated that the pure and Mo-doped NiO NPs exhibited strong absorption band at the wavelengths of 365 and 349 nm, respectively. The free radical scavenging activity of NiO and Mo-doped NiO NPs was also investigated by utilizing several biochemical assays. The Mo-doped NiO NPs showed better antioxidant activity (84.2%) towards ABTS. + at 200 µg/mL in comparison to their pure counterpart which confirmed that not only antioxidant potency of the doped NPs was better than pure NPs but this efficacy was also concentration dependant as well. The NiO and Mo-doped NiO NPs were further evaluated for their antibacterial activity against gram-positive (Staphylococcus aureus and Bacillus subtilis) and gram-negative (Pseudomonas aeruginosa and Escherichia coli) bacterial strains. The Mo-doped NiO NPs displayed better antibacterial activity (25 mm) against E. coli in comparison to the pure NPs. The synthesized NPs exhibited excellent aptitude for multi-dimensional applications.

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Section: Resultsmentioning

confidence: 98%

Effect of Mo doping in NiO nanoparticles for structural modification and its efficiency for antioxidant, antibacterial applications

Alam

BaQais

Mir

et al. 2023

Sci Rep

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“…In general, photocatalytic efficiency is enhanced by decreasing the rate of recombination of the generated electron–hole. Doping the metal oxides with elements is one of the strategies to enhance their structural and optical properties (Al Boukhari et al 2020 ; Bhatt et al 2020 ; Ahmed et al 2021 ). The partial reduction of NiO into metallic Ni in the NiO matrix leads to the improvement of the electron–hole generation, and hence achieves a better photocatalytic activity (Paliwal and Meher 2020 ; Srinivasa et al 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of mesoporous nano Ni/NiO and its synergistic role as super adsorbent and photocatalyst under sunlight irradiation

Mohamed

Elhgrasi

Ali

2022

Environ Sci Pollut Res

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Tailoring a material that has a synergistic role as an adsorbent and a photocatalyst for environmental application is an attractive field for research. This article presents a study of facile synthesis of NiO and Ni/NiO with a synergistic role as super adsorbents in the lake of light and photocatalysts under light irradiation. Nano flower-like mesoporous NiO and Ni/NiO were synthesized by the co-precipitation method. XRD, SEM, EDAX, XPS, BET, and DR/UV–Vis spectroscopy techniques were employed for samples’ analysis. The point of zero surface charge of prepared samples was detected by the batch equilibrium method. The adsorption efficiency was investigated in the absence of light using aniline blue as a pollutant model dye. The synergistic effect as an adsorbent and a photocatalyst was investigated under UV and sunlight irradiation. Different parameters affecting the adsorption in the dark have been optimized. The results showed that in the absence of light, the prepared samples are super adsorbents with a maximum adsorption capacity ranging from 210 to 230 mg g−1 and a removal % ranging from 95 to 100% within 2 h. Under UV or sunlight irradiation, the adsorbent/photocatalyst attained a dye removal % of 99.8% within 30 min. The adsorption data matched the pseudo-second-order model, and the equilibrium adsorption data showed compatibility with Langmuir model. The findings of experiments revealed that the adsorption is spontaneous, exothermic, and results in less entropy. Under sunlight irradiation, the dye removal efficiency increased by 19% in the case of Ni/NiO hybrid; it showed a removal efficiency of 99.5% within 30 min under sunlight irradiation versus 80% after 120 min in the dark.

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“…In an earlier study, from linear I – V plots for NiO and Zn:NiO nanoflakes, resistivities were estimated to be ∼4.1 × 10 7 and ∼10 × 10 7 Ω m, respectively . Surprisingly, while there are many reports which discuss the optical, morphological, and structural modifications induced by Zn-doping in NiO, ,,− there are hardly any which describe the electrical conduction behavior in detail.…”

Section: Resultsmentioning

confidence: 97%

Long-Lasting Panchromatic Electrochromic Device and Energy-Dense Supercapacitor Based on Zn-Doped NiO Microstars and a Redox-Active Gel

Naskar

Roy

Ghosal

et al. 2023

ACS Appl. Energy Mater.

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The technological importance of cost-effective zinc-doped nickel oxide (Zn:NiO) coatings is demonstrated by applying them to energy saving-electrochromic devices (ECDs) as well as energy storing-asymmetric supercapacitors (ASCs). These devices encompass an inexpensive nonaqueous gel electrolyte of ZnCl 2 /γ-butyrolactone/ ferrocene (Fc)/poly(vinyl butyral), where Fc serves as a redox mediator and accelerates charge transfer and transport kinetics, enhancing both ion-storage and optical modulation responses. This report showcases the prowess of a simple doping and a redox-gel in an unprecedented manner, wherein the improved dc and ac electrical conduction by an order of magnitude, the star-like morphology of Zn:NiO compared to NiO microflowers, and the high conductivity of the gel (33 mS cm −1 ) come to the fore in an ASC [with activated carbon (AC) derived from corncobs as the anode, Zn:NiO//AC], which delivers a very high specific capacitance (SC) of 460 F g −1 (at 1.25 A g −1 ), comparable to expensive rare oxides, a battery like energy density of 164 W h kg −1 (at 1 kW kg −1 ), and a cycle life of 10,000 cycles with 95% SC retention. The potential of Zn doping is further showcased through the panchromatic visible light modulation of the Zn:NiO//WO 3 ECD, switching reversibly between the colorless and the dark black−brown states, accompanied by a remarkably high integrated transmission modulation (ΔT 400−900nm ) of 60.2%, sustained over 3500 cycles with no performance loss, and color/bleach times of 10 s/5 s, most suitable for smart window applications.

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The influence of Zn and Mg doping on the structural and optical properties of NiO nano-structures for optoelectronic applications

Cited by 40 publications

References 47 publications

Effect of Mo doping in NiO nanoparticles for structural modification and its efficiency for antioxidant, antibacterial applications

Effect of Mo doping in NiO nanoparticles for structural modification and its efficiency for antioxidant, antibacterial applications

Facile synthesis of mesoporous nano Ni/NiO and its synergistic role as super adsorbent and photocatalyst under sunlight irradiation

Long-Lasting Panchromatic Electrochromic Device and Energy-Dense Supercapacitor Based on Zn-Doped NiO Microstars and a Redox-Active Gel

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