Effect of annealing temperature on the properties of transition metal doped zinc oxide – A review

Ismail, Siti Sarah Mohd; Ainuddin, Ainun Rahmahwati

doi:10.1063/1.5089400

Cited by 6 publications

(6 citation statements)

References 25 publications

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“…ZnO, as a semiconductor, is abundant in its three forms: hexagonal wurtzite, rock salt and cubic structures [ 14 ]. Among them, wurtzite has a direct bandgap energy of 3.40 EV [ 15 ]; thus, it is transparent in the visible region with most activity occurring in the UV/blue region. Moreover, the conductivity and luminescence of ZnO enhance the optical absorption and UV filtering property, resulting in an advanced biosensing ability of ZnO NPs [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Greener Synthesis of Zinc Oxide Nanoparticles: Characterization and Multifaceted Applications

et al. 2020

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Nanoparticles (NPs) have unique properties compared to their bulk counterparts, and they have potentials for various applications in many fields of life science. Green-synthesized NPs have garnered considerable interest due to their inherent features such as rapidity, eco-friendliness and cost-effectiveness. Zinc oxide nanoparticles (ZnO NPs) were synthesized using an aqueous extract of Kalanchoe blossfeldiana as a reducing agent. The resulting nanoparticles were characterized via X-ray diffraction (XRD), dynamic light scattering (DLS), UV-Vis spectroscopy, photoluminescence (PL), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). The antimicrobial potential of the synthesized ZnO NPs against bacterial and fungal strains was examined by the disk diffusion method, and they showed a promising antibacterial and antifungal potential. The catalytic activity of the synthesized ZnO NPs in reducing methylene blue (MB) and eosin was studied via UV-Vis spectroscopy. The decolorization percentages of the MB and Eosin Y dyes were 84% and 94%, respectively, which indicate an efficient degradation of the ZnO NPs. In addition, the cytotoxic activity of the ZnO NPs on the HeLa cell line was evaluated via in vitro assay. The MTT assay results demonstrate a potent cytotoxic effect of the ZnO NPs against the HeLa cancer cell line.

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Section: Introductionmentioning

confidence: 99%

Greener Synthesis of Zinc Oxide Nanoparticles: Characterization and Multifaceted Applications

et al. 2020

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“…The presence of room temperature in the Co doped ZnO annealed in a forming gas and its absence in the air annealed samples (data not shown here) is now a well-established result. The effect obviously is related to the introduction of additional charge carriers due to the oxygen vacancies and their role in the formation of bound magnetic polarons and possibly in the mediation of the moment between localized Co moments [27]. What is new here is the variation of the moment with the addition of Al in the oxygen reduced samples.…”

Section: Journal Of Nanoscopementioning

confidence: 86%

The effect of annealing time and gas flow rate on optical and magnetic properties of (Al,Co) co-doped ZnO nanoparticles by varying Al concentration

Qaseem

Naeem

Ikram

et al. 2021

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The effect of Al, a trivalent substitution was investigated in Co doped ZnO with regards to the role of additional carriers in n-type magnetic semiconductors. Nanoparticle samples of Zn1?xCo0.04AlxO with different Al compositions (x = 0, 0.005, 0.010, 0.015 and 0.020) were annealed at 600 oC for different time (5 hours and 8 hours) and different gas flow rates (25 sccm and 50 sccm). All nanoparticles attained Wurtzite hexagonal structure in a stable form after annealing in forming gas. The effect of annealing time and gas pressure were investigated. Magnetization measurements revealed that air annealed samples displayed paramagnetic properties. Nevertheless, after annealing in forming gas, magnetic moments are stabilized and follow a monotonic trend. Diffuse reflectivity measurements revealed the incorporation of Co2+ ions into the Wurtzite hexagonal lattice. The optical band-gap was found to be increasing with increasing Al concentration of up to 0.01, followed by a decrease with further increase in Al concentration

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“…Generally, precursor, solvent, catalyst and stabilizer or chelating agent are mixed in required ratio and stirred at respective speed, temperature and time to produce precursor solution. The sol-gel obtained is aged commonly for 24 hours to obtain homogenous solution, before it can be used for the subsequent procedure [33].…”

Section: Fabrication Methodsmentioning

confidence: 99%

“…The coated samples are dried by pre-heating process at appropriate temperature and time. Samples prepared via this method normally will undergo annealing process as the last step, where nanostructured morphology is produced [33].…”

Section: Fabrication Methodsmentioning

confidence: 99%

Growth of Nanostructured Zinc Oxide on Flexible Conductive Substrate: A Review

Rahmahwati

Ismail

Kamdi

et al. 2022

KEM

Self Cite

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In this paper, a review on the structural and morphological of nanostructured zinc oxide (ZnO) fabricated on flexible conductive substrate, mainly indium tin oxide coated on polyethylene terephthalate (ITO/PET) via various fabrication method is reported. Besides fabrication method, the effect of fabrication condition such as immersion time of ZnO-ITO/PET via hydrothermal method, concentration of modification material of precursor solution via sol-gel method, value of applied cathodic voltage and value of current densities via electrochemical deposition are also discussed. XRD analysis showed that the growth of ZnO-ITO/PET are preferred on (002) or (101) planes. SEM analysis revealed various type of nanostructured ZnO when prepared by sol-gel, spin coating, HWT and hydrothermal method, highlighting ZnO nanorods as the main morphology of ZnO-ITO/PET. The diameter of ZnO nanorods ranges from 10 nm to 830 nm.

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Effect of annealing temperature on the properties of transition metal doped zinc oxide – A review

Cited by 6 publications

References 25 publications

Greener Synthesis of Zinc Oxide Nanoparticles: Characterization and Multifaceted Applications

Greener Synthesis of Zinc Oxide Nanoparticles: Characterization and Multifaceted Applications

The effect of annealing time and gas flow rate on optical and magnetic properties of (Al,Co) co-doped ZnO nanoparticles by varying Al concentration

Growth of Nanostructured Zinc Oxide on Flexible Conductive Substrate: A Review

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