Investigation of photoluminescence in undoped and Ag-doped ZnO flowerlike nanocrystals

Jin, Yongxing; Cui, Qiliang; Wang, Kai; Hao, Jian; Wang, Qiushi; Zhang, Jian

doi:10.1063/1.3549826

Cited by 61 publications

(20 citation statements)

References 32 publications

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“…According to previous reports, segregation of Ag to the grain boundaries of ZnO crystal resulted in no positional shift in the XRD diffractograms . On the other hand, substitutional or interstitial incorporation of the Ag into the ZnO lattice leaded to measurable peak shifts to relatively lower or higher 2θ values, respectively. Figure (b) shows the enlarged regional XRD patterns of the samples within the 2θ range of 30°–40° acquired at a relatively slow scan rate of 0.5°/min.…”

Section: Resultsmentioning

confidence: 54%

Highly Efficient Room Temperature Synthesis of Silver‐Doped Zinc Oxide (ZnO:Ag) Nanoparticles: Structural, Optical, and Photocatalytic Properties

2013

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Synthesis of silver‐doped zinc oxide (ZnO:Ag) nanoparticles through precipitation method has been reported. The synthesis was conducted at room temperature and no subsequent thermal treatment was applied. ZnO nanoparticles were characterized by X‐ray diffraction (XRD), transmission electron microscopy (TEM), X‐ray photoelectron spectroscopy (XPS), fourier transmission infrared spectroscopy (FTIR), and ultraviolet‐visible (UV–Vis) spectroscopy. Detailed crystallographic investigation was accomplished through Rietveld refinement. The effect of silver content on structural and optical properties of resultant ZnO nanoparticles has been reported. It was found that silver doping results in positional shifts for the XRD peaks and the absorption band edge of ZnO. These were attributed to the substitutional incorporation of Ag+ ions into Zn2+ sites within the ZnO crystal. In addition, higher silver incorporation resulted in smaller size for ZnO nanoparticles. The photocatalytic activity of the ZnO:Ag nanoparticles was also determined by methylene orange (MO) degradation studies and compared to that of undoped ZnO. Improved photocatalytic activity was obtained for ZnO:Ag nanoparticles. It has been shown that an optimum amount of silver dopant is required to obtain maximum photocatalytic activity.

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Section: Resultsmentioning

confidence: 54%

Highly Efficient Room Temperature Synthesis of Silver‐Doped Zinc Oxide (ZnO:Ag) Nanoparticles: Structural, Optical, and Photocatalytic Properties

2013

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“…Figure 7(d) shows the multiplex spectrum of zinc peaks. The peaks at binding energies of 1021.7 eV can be assigned to Zn 2p3/2 of the Zn-O bond [35]. Moreover, by calculating determination of the peak area of XPS curve, we can see that the atom ratio of Cd/Zn is about 1, which is close to that of the theoretical standard.…”

Section: X-ray Photoelectron Spectroscopy (Xps)supporting

confidence: 50%

Preparation of ZnO/CdS/BC Photocatalyst Hybrid Fiber and Research of Its Photocatalytic Properties

Dai

Cheng

Qingcheng

et al. 2015

Journal of Nanotechnology

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An environment-friendly biomaterial bacterial cellulose (BC) is introduced to substitute general organic polymers to assist the preparation of ZnO/CdS/BC photocatalyst hybrid nanofiber through coprecipitation method under the low-temperature condition. The XRD, XPS, and SEM results show that high load of ZnO/CdS/BC ternary hybrid fiber can be produced. TGA curves scan shows that ZnO/CdS/BC hybrid fiber has better thermal properties than bacterial cellulose. The UV-Vis spectra of the ZnO/CdS/BC hybrid nanofiber (0, 10, 20, and 50 wt%, resp.) show that photocatalytic activities of ZnO/CdS/BC are influenced by the added amount of CdS. The degradation curve of methyl shows that ZnO/CdS/BC nanohybrid fibers exhibit excellent photocatalytic efficiency.

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“…Symmetrical peaks are visible in Fig. 4(b) located at 1044.81 and 1021.67 eV for the sample of pure zinc oxide ascribed to Zn(2p 1/2 ) and Zn(2p 3/2 ), respectively 32 . The splitting of Zn-2p states was about 23 eV which was induced from the powerful spin-orbit coupling.…”

Section: Xps Resultsmentioning

confidence: 99%

“…By increasing Ag concentration, the intensity of DLE decreased. The reduction of DLE with Ag doping represented a decline in the defects and improved crystallization ZnO 12,32 . To better understand the role of Ag doping in the optical properties, Gaussian fitting was performed on PL spectra.…”

Section: Optical Studiesmentioning

confidence: 99%

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Effect of Ag doping on structural, optical, and photocatalytic properties of ZnO nanoparticles

Hosseini

Sarsari

Kameli

et al. 2015

Journal of Alloys and Compounds

274

126

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Silver-doped ZnO nanoparticles were successfully fabricated at 400• C via a simple and rapid method based on short time solid state milling and calcination of precursor powders. The effect of Ag dilute doping on the structural, optical, and photocatalytic properties of ZnO nanoparticles was investigated by X-ray diffraction (XRD), UV-vis spectrophotometer and photoluminescence (PL) spectroscopy. X-ray analysis revealed that Ag doped ZnO solidified in hexagonal wurtzite structure. The intensity of deep level emission was reduced with increasing silver doping in PL measurement. The X-ray photoelectron spectroscopy (XPS) measurement predicted that Ag was mainly in the metallic state and ZnO was in the wurtzite structure. This metallic state accompanied by unique zinc oxide properties decolorized the methyl violet, efficiently. The first-principles calculation represented Ag deep level in ZnO with an n-type behavior, while in ZnO structure with grain boundary p-type nature via shallow states is dominant same as powder samples as studied in this present work. It was suggested that these Ag-doped ZnO nanoparticles may have good applications in optoelectronics, spintronics and wastewater treatment.

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Investigation of photoluminescence in undoped and Ag-doped ZnO flowerlike nanocrystals

Cited by 61 publications

References 32 publications

Highly Efficient Room Temperature Synthesis of Silver‐Doped Zinc Oxide (ZnO:Ag) Nanoparticles: Structural, Optical, and Photocatalytic Properties

Highly Efficient Room Temperature Synthesis of Silver‐Doped Zinc Oxide (ZnO:Ag) Nanoparticles: Structural, Optical, and Photocatalytic Properties

Preparation of ZnO/CdS/BC Photocatalyst Hybrid Fiber and Research of Its Photocatalytic Properties

Effect of Ag doping on structural, optical, and photocatalytic properties of ZnO nanoparticles

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