Effect of (Cd, Al) Co-doping and hydrogenation on the long-range ferromagnetic ordering of ZnO: Experimental and DFT studies

Dakhel, A.A.; Bououdina, M.; Jaafar, Adnan; Khan, Wilayat; Azam, Sikander; Minář, J.; Kanoun, Mohammed Benali; Goumri‐Said, Souraya

doi:10.1016/j.jallcom.2018.04.221

Cited by 7 publications

(6 citation statements)

References 32 publications

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“…On this length scale, the surface roughness values, listed in Table 1, are of the order of few nanometers, in agreement with other reports [31,32]. The relative difference in atomic radii of the zinc (0.74 Å), silver (1.26 Å) and aluminum (0.535 Å) also introduces lattice distortion in the form of increased dislocation density and lattice strains [33,38]. [31,32].…”

Section: Morphological and Wettability Studiessupporting

confidence: 90%

“…[31,32]. The relative difference in atomic radii of the zinc (0.74 Å), silver (1.26 Å) and aluminum (0.535 Å) also introduces lattice distortion in the form of increased dislocation density and lattice strains [33,38]. The surface morphology (grain size and roughness) and composition can also be indirectly gauged from surface water contact angle measurements.…”

Section: Morphological and Wettability Studiesmentioning

confidence: 99%

“…Depending on the film attributes and illumination conditions, ZnO films may exhibit highly hydrophobic or hydrophilic characteristics [39,40]. The difference in the ionic radii of the Zn and Ag introduces compressive strain in the resulting films, with a reported value of 0.92 × 10 −3 for 2 wt.% Ag in ZnO [38]. The water contact angle (CA) values for the intrinsic and silver-or aluminum-doped ZnO films, as determined from sessile water droplets on the film surfaces (Table 1) are graphically represented in Figure 4.…”

Section: Morphological and Wettability Studiesmentioning

confidence: 99%

“…Addition of two or more metal dopants into ZnO has been reported to greatly improve the photocatalytic behavior through a reduction in electron-hole recombination rate. While most reported studies use certain dopants along with aluminum, there are few investigations that employ other metal dopant combinations [38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

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Photocatalytic and Photostability Behavior of Ag- and/or Al-Doped ZnO Films in Methylene Blue and Rhodamine B under UV-C Irradiation

et al. 2019

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Silver (Ag) and/or aluminum (Al)-doped zinc oxide (ZnO:Ag, ZnO:Al) films with different concentrations were produced using sol-gel process and investigated for wettability and photocatalysis. Water contact angle (CA) measurements indicated the films to be hydrophilic with reduced solid/liquid interfacial surface energy upon metal doping. The films were highly transparent (>94%) with red or blue shift in the absorption edge depending on the dopant type (Ag or Al) owing to the Burstein–Moss effect. The ZnO:Ag and ZnO:Al films with 0.5 and 1.0 wt.% metal dopant showed high degradation efficiency in methylene blue (MB) solution under UV irradiation, mainly due to an increase in the photogenerated electron–hole pair recombination time and hydroxyl radicals (·OH) generation. The MB degradation followed pseudo-first-order reaction with maximum apparent reaction rate constant of 2.40 h−1 for the 0.5 wt.% ZnO:Al film. ZnO films with 1.0 wt.% dopant demonstrated excellent photostability and recyclability even after several runs presumably due to reduced Zn2+ dissolution as well as blocking of the active surface area. ZnO:(Ag + Al) film containing 0.5 wt.% Al and Ag showed excellent UV photodegradation of MB and rhodamine blue (RhB) with high levels of photostability over five cycles.

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Section: Morphological and Wettability Studiessupporting

confidence: 90%

Section: Morphological and Wettability Studiesmentioning

confidence: 99%

Section: Morphological and Wettability Studiesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Photocatalytic and Photostability Behavior of Ag- and/or Al-Doped ZnO Films in Methylene Blue and Rhodamine B under UV-C Irradiation

et al. 2019

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“…Inset of Figure 6b shows a Tauc plot that gives the optical band gap of the doped system using formula [37]. The band gap of the CdZnO structure is 3.04 eV as compared to the experimental band gap values of 3.21 eV 35 and 3.29-3.32 eV 45 . The decrease in the band gap of the doped system is due to the reason that CdO (2.23 eV) has a lower band gap than pristine ZnO 3.37 eV.…”

Section: Band Gap Analysismentioning

confidence: 89%

Studies of electrical and optical properties of cadmium‐doped zinc oxide for energy conversion devices

et al. 2021

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In this modern era, energy devices have become an important part of our daily life. Various types of energy conversion devices have been developed to meet the current energy demands. Semiconductor anode (CdZnO) has been synthesized by the sol-gel method and lattice constants and the band gap results have been compared experimentally and theoretically. XRD results show that Cddoped ZnO shifts the peaks toward the lower angles, increases the lattice parameters, and decreases the crystallite size (48 nm). Microstructure of Cd-doped ZnO shows the agglomerations of particles, found in the shape of cubes, hexagons, and dumbbell shapes with diameter in the range of 2-7 µm. The experimentally obtained conductivity of CdZnO is 0.142 S/cm at 550 • C. The electrochemical impedance spectroscopy shows the decreased resistance with an increase in temperature. The doped system shows a maximum open circuit voltage of 0.95 V and performance of 0.52 W/cm 2 at 550 • C.

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Structural, electrical and optical properties of ZnO nanoparticle: combined experimental and theoretical study

et al. 2018

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Effect of (Cd, Al) Co-doping and hydrogenation on the long-range ferromagnetic ordering of ZnO: Experimental and DFT studies

Cited by 7 publications

References 32 publications

Photocatalytic and Photostability Behavior of Ag- and/or Al-Doped ZnO Films in Methylene Blue and Rhodamine B under UV-C Irradiation

Photocatalytic and Photostability Behavior of Ag- and/or Al-Doped ZnO Films in Methylene Blue and Rhodamine B under UV-C Irradiation

Studies of electrical and optical properties of cadmium‐doped zinc oxide for energy conversion devices

Structural, electrical and optical properties of ZnO nanoparticle: combined experimental and theoretical study

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