Effect of annealing on photoluminescence of blue-emitting ZnO nanoparticles by sol–gel method

Chen, Z.; Li, X. X.; Chen, N.; Wang, H.; Du, Guoping; Suen, Andy Y.M.

doi:10.1007/s10971-012-2719-5

Cited by 24 publications

(9 citation statements)

References 28 publications

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“…Additionally, the return of device current at the higher ILdoping content is probably caused by the excess ions from [BMIm]Cl in the transition process of coulombic interaction from [PEDOT:PSS] to [[BMIm]Cl:PSS], giving rise to the transition of conductivity mechanism between ionic conductivity and electronic conductivity in organic mixed ionic electronic conductor [32,33]. This is a little different from the previous conclusions about the secondary doping of PEDOT:PSS, that the conductivity change is due to the phase segregation between PEDOT and PSS resulting in the partial removal of PSS from PEDOT:PSS and the conformational change of PEDOT chains from a coil structure to an extended coil or linear structure [12,13]. However, we deemed that the phase transition should be one important issue to affect the ionization potential of IL-doped PEDOT:PSS.…”

Section: Resultscontrasting

confidence: 69%

Enhanced electroluminescent efficiency with ionic liquid doped into PEDOT:PSS hole-injecting layer

Liu

Zhao

et al. 2015

Polymer

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Section: Resultscontrasting

confidence: 69%

Enhanced electroluminescent efficiency with ionic liquid doped into PEDOT:PSS hole-injecting layer

Liu

Zhao

et al. 2015

Polymer

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“…Thermodynamically, a higher annealing temperature provides higher thermal energy to the system and increases the particle collision rate. These results from increasing the kinetic energy and the particle aggregation . Also, because of the random growth of clusters on the CNF matrix, the nanocluster size distribution becomes very wide.…”

Section: Resultsmentioning

confidence: 99%

Oxygen Vacancy-Induced Structural, Optical, and Enhanced Supercapacitive Performance of Zinc Oxide Anchored Graphitic Carbon Nanofiber Hybrid Electrodes

Dillip¹,

Banerjee²,

Anitha³

et al. 2016

ACS Appl. Mater. Interfaces

178

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Zinc oxide (ZnO) nanoparticles (NPs) anchored to carbon nanofiber (CNF) hybrids were synthesized using a facile coprecipitation method. This report demonstrates an effective strategy to intrinsically improve the conductivity and supercapacitive performance of the hybrids by inducing oxygen vacancies. Oxygen deficiency-related defect analyses were performed qualitatively as well as quantitatively using Fourier transform infrared spectroscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. All of the analyses clearly indicate an increase in oxygen deficiencies in the hybrids with an increase in the vacuum-annealing temperature. The nonstoichiometric oxygen vacancy is mainly induced via the migration of the lattice oxygen into interstitial sites at elevated temperature (300 °C), followed by diffusion into the gaseous phase with further increase in the annealing temperature (600 °C) in an oxygen-deficient atmosphere. This induction of oxygen vacancy is corroborated by diffuse reflectance spectroscopy, which depicts the oxygen-vacancy-induced bandgap narrowing of the ZnO NPs within the hybrids. At a current density of 3 A g(-1), the hybrid electrode exhibited higher energy density (119.85 Wh kg(-1)) and power density (19.225 kW kg(-1)) compared to a control ZnO electrode (48.01 Wh kg(-1) and 17.687 kW kg(-1)). The enhanced supercapacitive performance is mainly ascribed to the good interfacial contact between CNF and ZnO, high oxygen deficiency, and fewer defects in the hybrid. Our results are expected to provide new insights into improving the electrochemical properties of various composites/hybrids.

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“…The sol-gel method is a widely used method by scientists to synthesize ZnO NPs [30,31,32,33,34,35,36,37,38,39]. The sol-gel method is based on colloidal chemistry.…”

Section: Zinc Oxide Nanoparticlesmentioning

confidence: 99%

(Bio)polymer/ZnO Nanocomposites for Packaging Applications: A Review of Gas Barrier and Mechanical Properties

et al. 2019

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Nanotechnology is playing a pivotal role in improving quality of life due to its versatile applications in many areas of research. In this regard, nanoparticles have gained significant importance. Zinc oxide nanoparticles (ZnO NPs) amongst other nanoparticles are being used in producing nanocomposites. Methods like solvent casting, solution casting, solvent volatilization, twin-screw extrusion, melt compounding and extrusion blow molding have been applied to produce ZnO NPs based (bio)polymer composites. These composites are of great interest in the research area of food packaging materials due to their improved multifunctional characteristics like their mechanical, barrier and antimicrobial properties. This paper gives an overview of the main methods to synthesize ZnO NPs, methods to incorporate ZnO NPs in (bio)polymers, and finally, the gas barrier and mechanical properties of the nanocomposites. As a conclusion, a maximum decline in oxygen, carbon dioxide and water vapor permeability was reported as 66%, 17% and 38% respectively, while tensile strength and young’s modulus were observed to increase by 32% and 57% respectively, for different (bio)polymer/ZnO nanocomposites.

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Effect of annealing on photoluminescence of blue-emitting ZnO nanoparticles by sol–gel method

Cited by 24 publications

References 28 publications

Enhanced electroluminescent efficiency with ionic liquid doped into PEDOT:PSS hole-injecting layer

Enhanced electroluminescent efficiency with ionic liquid doped into PEDOT:PSS hole-injecting layer

Oxygen Vacancy-Induced Structural, Optical, and Enhanced Supercapacitive Performance of Zinc Oxide Anchored Graphitic Carbon Nanofiber Hybrid Electrodes

(Bio)polymer/ZnO Nanocomposites for Packaging Applications: A Review of Gas Barrier and Mechanical Properties

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