The annealing effect on microstructure and ESR properties of (Cu/Ni) co-doped ZnO nanoparticles

Güler, Ayşegül Selcen; Arda, L.; Doǧan, N.; Boyraz, Cihat; Özuğurlu, E.

doi:10.1016/j.ceramint.2018.10.056

Cited by 52 publications

(14 citation statements)

References 35 publications

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“…The peak (101) was found as the highest peak among all the other indexed peaks ( Figure 2). Figure 3b) by experimentally obtained parameters which were also displayed in Table. The average crystallite size was calculated from the XRD peak width of (101) based on the Debye-Scherrer equation [7,9], The lattice constants a and cwere calculated with the following formula [7,9]:…”

Section: Structural Analysismentioning

confidence: 99%

“…Among nanosized materials, metal-oxide nanoparticles have an incredibly big potential in many research areas due to their small particle size, large surface area and advanced chemical, optical, morphological and antibacterial properties. Metal oxide NPs can be synthesized by using biological systems as bacteria, fungi and yeast [1][2][3][4] or synthetic pathways like hydrothermal method [5,6], sol-gel method [7][8][9][10][11] and chemical vapor deposition [12]. Metal-oxide NPs find applications in textile industry [13,14], electronics [15,16,17], gas sensing applications [18][19][20], in medical applications like selective destruction of tumor cells [21], intracellular drug delivery [22] and some diagnostic applications.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Mg doping on morphology, photocatalytic activity and related biological properties of Zn1−xMgxO nanoparticles

Yalçın¹,

Akcan²,

Yalçın³

et al. 2020

Turk J Chem

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The objective of this study is to synthesize ZnO and Mg doped ZnO (Zn 1−x Mg x O) nanoparticles via the sol-gel method, and characterize their structures and to investigate their biological properties such as antibacterial activity and hemolytic potential.Nanoparticles (NPs) were synthesized by the sol-gel method using zinc acetate dihydrate (Zn(CH 3 COO) 2 .2H 2 O) and magnesium acetate tetrahydrate (Mg(CH 3 COO) 2 .4H 2 O) as precursors. Methanol and monoethanolamine were used as solvent and sol stabilizer, respectively. Structural and morphological characterizations of Zn 1−x Mg x O nanoparticles were studied by using XRD and SEM-EDX, respectively. Photocatalytic activities of ZnO and selected Mg-doped ZnO (Zn 1−x Mg x O) nanoparticles were investigated by degradation of methylene blue (MeB). Results indicated that Mg doping (both 10% and 30%) to the ZnO nanoparticles enhanced the photocatalytic activity and a little amount of Zn 0.90 Mg 0.10 O photocatalyst (1.0 mg/mL) degraded MeB with 99% efficiency after 24 h of irradiation under ambient visible light. Antibacterial activity of nanoparticles versus Escherichia coli (E. coli) was determined by the standard plate count method. Hemolytic activities of the NPs were studied by hemolysis tests using human erythrocytes. XRD data proved that the average particle size of nanoparticles was around 30 nm. Moreover, the XRD results indicated that the patterns of Mg doped ZnO nanoparticles related to ZnO hexagonal wurtzite structure had no secondary phase for x ≤ 0.2 concentration. For 0 ≤ x ≤ 0.02, NPs showed a concentration dependent antibacterial activity against E. coli. While Zn 0.90 Mg 0.10 O totally inhibited the growth of E. coli, upper and lower dopant concentrations did not show antibacterial activity.

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Section: Structural Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Mg doping on morphology, photocatalytic activity and related biological properties of Zn1−xMgxO nanoparticles

Yalçın¹,

Akcan²,

Yalçın³

et al. 2020

Turk J Chem

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show abstract

“…The increasing demands on both energy and technological applications make the materials critical on their physical characteristics with new varying chemical combinations. Zinc oxide (ZnO), a well-known and widely used material with different dopant elements, still keeps the importance on varying miscellaneous properties depending on synthesizing conditions and dopant rates with different elements [1][2][3][4][5][6][7][8]. With the feature of wide band-gap (3.37 eV), semiconductor ZnO occupies a special place at detector technologies with the blue and UV spectral ranges and solid-state light sources [9 and the references therein].…”

Section: Introductionmentioning

confidence: 99%

Structure, microstructure and optical properties of Tb doped ZnO nanorods

Güler

2020

International Journal of Advances in Engineering and Pure Sciences

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The rare-earth-doped Zinc Oxides (ZnO) are significant materials, especially in photodetector technology, for high detection and high-speed optical communication. Here, important physical properties of Terbium-doped ZnO synthesized by the hydrothermal method were analyzed based on their concentration dependence. Structural behaviors of the nanorods were identified by the X-ray diffraction (XRD) technique and were figured out that Zn1-xTbxO samples were hexagonal Wurtzite structure with no secondary phase. The results of the structural behaviors were also proved by Rietveld analysis. The effect of Tb element in Zn1-xTbxO composition was clarified by calculating lattice parameters and cell volumes. To define the system better, microstructural parameters were provided by calculation. Scanning Electron Microscope images revealed random agglomeration. Due to the small amount of Tb increment in Zn1-xTbxO set, the desired elemental composition results were obtained in the nanorod sets (from x=0 to x=0.05 with the increment x rate of 0.01). By plotting (() ℎυ) 2 versus hʋ, the bandgap energies of Zn1-xTbxO structures were determined, and the variation of Eg energies with increasing Tb dopant in the structures were discussed.

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“…The usage of ZnO and its doped forms exhibit board range industrial applications in biomaterials, spintronics, optoelectronics, and cosmetics. ZnO and its doped forms also offer an extra opportunity with the property of adjusting size and band gap [4][5][6][7][8][9][10][11][12]. ZnO is in the one of the dilute magnetic semiconductor (DMS) materials' family with a wide band-gap (3.37 eV) and a large exciton binding energy (60 meV).…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetic properties Zn0.96Cu0.01Ni0.03O nanoparticles

Güler

2019

International Journal of Advances in Engineering and Pure Sciences

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Zn 0.96 Cu 0.01 Ni 0.03 O nanoparticles were prepared by sol-gel technique and annealed under wide temperature range (450, 500, 550, 600, 700, 800, and 900 0 C). To figure out the possible structural phases X-ray diffraction technique (XRD) was used. The lattice parameters were calculated by Rietveld analysis and correlated by annealing temperatures. For the synthesized nanoparticles, the optimum annealing temperatures were achieved at 450, 500, and 550 °C and further annealing temperature increment gave rise to secondary NiO peaks. The Scanning Electron Microscope (SEM) images show random ball-shaped particle distribution. Energy dispersive X-ray spectroscopy (EDX) showed only the peaks belong to the composition. Magnetic measurements were performed using Quantum Design Vibrating Sample Magnetometer (QDVSM) tool for Zn 0.96 Cu 0.01 Ni 0.03 O nanosystems. From the DC magnetic field dependent magnetization curves, clear paramagnetic behavior was revealed for all Cu-Ni co-doped ZnO nanoparticles. ÖzZn 0.96 Cu 0.01 Ni 0.03 O nanoparçacıkları, sol-gel tekniği ile hazırlanıp geniş sıcaklık aralığında (450, 500, 550, 600, 700, 800, 900 ° C) tavlandı. Olası yapısal fazları belirlemek için X-ışını kırınım tekniği (XRD) kullanılmıştır. Kafes parametreleri Rietveld analizi ile hesaplanmış ve tavlama sıcaklıkları ile ilişkilendirilmiştir. Sentezlenen nanoparçacıklar için, optimum tavlama sıcaklıkları 450, 500 ve 550 ° C'de elde edildi ve ayrıca tavlama sıcaklığı artışı ikincil NiO fazlarına yol açmıştır. Taramalı Elektron Mikroskobu (SEM) görüntüleri rastgele küre şeklindeki parçacık dağılımını göstermektedir. Enerji dağıtıcı X-ışını spektroskopisi (EDX) sadece kompozisyona ait pikleri göstermektedir. Zn 0.96 Cu 0.01 Ni 0.03 O nanoparçacıkları için manyetik ölçümler, Kuantum Dizayn Titreşen Örnek Manyetometresi (QDVSM) kullanılarak yapıldı. DC manyetik alana bağlı mıknatıslanma eğrilerinden, tüm Cu-Ni ortak katkılı ZnO nanoparçacıklarının net paramanyetik davranışı gösterildi.Anahtar Kelimeler: Sol-gel metot, Cu, Ni, ve ZnO nanosistemleri, Manyetik özellikler.

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The annealing effect on microstructure and ESR properties of (Cu/Ni) co-doped ZnO nanoparticles

Cited by 52 publications

References 35 publications

Effect of Mg doping on morphology, photocatalytic activity and related biological properties of Zn1−xMgxO nanoparticles

Effect of Mg doping on morphology, photocatalytic activity and related biological properties of Zn1−xMgxO nanoparticles

Structure, microstructure and optical properties of Tb doped ZnO nanorods

Structure and magnetic properties Zn0.96Cu0.01Ni0.03O nanoparticles

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