scholarly journals Optical and Photodetection Properties of ZnO Nanoparticles Recovered from Zn Dross

Crystals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 6
Author(s):  
Lina Jaya Diguna ◽  
Aprilia Dyah Fitriani ◽  
Beta Riana Liasari ◽  
Gerald Ensang Timuda ◽  
Wahyu Bambang Widayatno ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Zno Nanoparticle ◽  
Dye Molecules ◽  
Photoluminescence Spectra ◽  
Zno Film ◽  
Light Region ◽  
Emission Lifetime ◽  
Hydrometallurgical Method ◽  
Nanoparticle Film

In this study, we report the synthesis of ZnO nanoparticles from Zn dross via hydrometallurgical method by using acetic acid as a leaching agent. D205 dye molecules were then adsorbed onto Zn dross originated ZnO nanoparticle film. The optical absorption confirms the photosensitization of the synthesized ZnO nanoparticles with dye. The photoluminescence spectra reveal the excitonic- and defect-related emission of ZnO nanoparticles. Compared to ZnO nanoparticles only, the longer emission lifetime of ZnO nanoparticles with adsorbed dye indicates the transfer of photoexcited electrons from dye to the ZnO nanoparticles. Furthermore, photodetection characterization of ZnO film show the enhanced current density with the presence of dye under simulated solar illumination, while that measured at dark is similar in both films with and without dye. This result confirms the potentiality of Zn dross to be recycled into valuable ZnO nanoparticles particularly for the applications in the visible light region, especially for sensing.

scholarly journals PREPARATION AND CHARACTERIZATION OF GO/ZnO ELECTRODE FOR SUPERCAPACITORS

2019 ◽  
Vol 57 (5) ◽  
pp. 585
Author(s):  
Hoang Tran Dung ◽  
Doan Thanh Tung ◽  
Le Thi Thanh Tam ◽  
Trinh Quang Dung ◽  
Nguyen Thi Yen ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Solvothermal Method ◽  
Graphite Substrate ◽  
Zno Film ◽  
Galvanostatic Charge ◽  
Discharge Capacitance ◽  
Aqueous Solvent ◽  
Specific Discharge ◽  
A Current

In this paper, zinc oxide (ZnO) nanoparticles were prepared by solvothermal method. A mixture of ZnO nanoparticles and GO, surfactants, binders are dispersed in aqueous solvent. This suspension was then used as the ink for the modified 3d printer to coat on the graphite substrate to form electrodes. The GO/ZnO film has a specific capacitance of 119.9 F/g at a scan rate of 5 mV/s of CV test. The specific discharge capacitance was 153.9 F/g and retained 94.5% after 3000 cycles of galvanostatic charge-discharge (GCD) measurement with a current density of 15 mA/cm2.

scholarly journals Multifunctional ZnO Nanoparticle: Based Coatings for Cultural Heritage Preventive Conservation

2021 ◽  
Author(s):  
Ludmila Otilia Cinteză ◽  
Maria Antonia Tănase
Keyword(s):  
Cultural Heritage ◽  
Zno Nanoparticles ◽  
Recent Progress ◽  
Functional Materials ◽  
Zno Nanoparticle ◽  
Functional Coatings ◽  
Metal Artifacts ◽  
Preventive Conservation ◽  
Environmental Friendly

Coatings based on nanoparticles embedded in various filmogenic materials are still a hot topic in nanomaterial research, due to the exceptional variety of applications. The chapter present recent progress in synthesis and characterization of hybrid material with ZnO nanoparticles and their use as functional coatings for various substrates. The antibacterial and UV protection efficiency of ZnO nanoparticle-based coatings on paper and stone are discussed, with particular emphasize on the specific requirements for application in cultural heritage preventing conservation. Functional materials based on ZnO are presented as possible treatment for protection of historic and archaeological textiles and metal artifacts. Trends in environmental friendly methods to fabricate the ZnO nanoparticles will be evaluated, compared to classic ones, in terms of material characteristics and efficiency.

Synthesis of Imine-Bearing ZnO Nanoparticle Thin Films and Characterization of Their Structural, Morphological and Optical Properties

2015 ◽  
Vol 15 (10) ◽  
pp. 8114-8119 ◽  
Author(s):  
Narinder Kaur ◽  
Sanjeev K. Sharma ◽  
Deuk Young Kim ◽  
Hemant Sharma ◽  
Narinder Singh
Keyword(s):  
Thin Films ◽  
Zno Nanoparticles ◽  
Visible Region ◽  
Hexagonal Wurtzite Structure ◽  
Xrd Analysis ◽  
Zno Nanoparticle ◽  
X Ray Diffraction ◽  
X Ray ◽  
Corning Glass

We are presenting the first report on the fabrication of imine-bearing ZnO nanoparticle thin films grown on Corning glass by spin coating. The sol was prepared by dissolving imine-bearing ZnO nanoparticles in dimethylsulfoxide (DMSO). The thickness of the films was manipulated to be 125–200 nm. The X-ray diffraction (XRD) analysis showed hexagonal wurtzite structure of imine-bearing ZnO nanoparticles thin films with a (002) preferential orientation. The stretching of chemical bonds of the imine linkage and Zn–O in imine-bearing ZnO nanoparticle thin films was confirmed by fourier transform infrared spectroscopy (FTIR). The grain size of the films increased with increasing the thickness of the films due to the number of coatings and subsequently dried at 200°C. The transmittance of imine-bearing ZnO nanoparticle thin films was observed to be ≥94%, which was in close agreement to pure ZnO thin films in the visible region. The bandgap of imine-bearing ZnO nanoparticle thin films (3.04 eV), evaluated from Tauc’s plot, was observed to be lower than that of pure ZnO (3.21 eV), which is attributed to the interaction of the ZnO nanoparticles with the imine receptor.

scholarly journals GREEN SYNTHESIS AND CHARACTERIZATION OF MARINE YEAST-MEDIATED SILVER AND ZINC OXIDE NANOPARTICLES AND ASSESSMENT OF THEIR ANTIOXIDANT ACTIVITY

2017 ◽  
Vol 10 (10) ◽  
pp. 235 ◽  
Author(s):  
Aswathy R ◽  
Gabylis B ◽  
Anwesha S ◽  
Bhaskara Rao Kv
Keyword(s):  
Antioxidant Activity ◽  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Color Change ◽  
Time Interval ◽  
Marine Yeasts ◽  
Zno Nanoparticle ◽  
Marine Yeast ◽  
Nanoparticles Characterization

  Objective: The present study focuses on the synthesis of silver and zinc oxide (ZnO) nanoparticles from marine yeasts, isolated from the sediments of the Bay of Bengal, Bakkhali coast, West Bengal, and India.Methods: The marine sediment samples were diluted through serial diution and cultured onto yeast malt agar medium by the spread plate method. The selected yeast isolates were screened for the biosynthesis of silver and ZnO nanoparticles. Characterization of both the nanoparticles was done by applying ultraviolet (UV)-visible spectroscopy, atomic force microscopy, scanning electron microscopy, and Fourier transform infrared spectroscopy.Results: A total of five marine yeasts isolates were able to synthesize silver and ZnO nanoparticles as evidence of the color change. Optical density was measured in UV-spectrometer at different time interval for the conformation of production of nanoparticles. The size of silver nanoparticle was 31.78 nm and ZnO nanoparticle was 86.27 nm. The synthesized nanoparticles are then used for antioxidant assays.Conclusions: We are concluding that marine yeast isolates SAG1 and SAG2 both are potential marine yeast isolates which can synthesize both the silver and ZnO nanoparticles. They also showed good antioxidant activity.

scholarly journals Synthesis and Characterization of SnO2 and SnO2/ZnO Nanoparticles by Electrochemical Method: Evaluation of their Performance in Photodegradation of Indigo Carmine Dye and Antibacterial Activity

2020 ◽  
Vol 32 (9) ◽  
pp. 2119-2124
Author(s):  
K.P. SAMSKRUTHI ◽  
SANNAIAH ANANDA ◽  
M.B. NANDAPRAKASH ◽  
K.S. CHANDRAKANTHA
Keyword(s):  
Antibacterial Activity ◽  
Zno Nanoparticles ◽  
Electrochemical Method ◽  
Indigo Carmine ◽  
Average Crystalline Size ◽  
Zno Nanoparticle ◽  
X Ray Diffraction ◽  
First Order ◽  
Indigo Carmine Dye

SnO2 and SnO2/ZnO nanoparticles were synthesized by the electrochemical method. The synthesized nanoparticles were characterized by XRD, UV-VIS, IR, FE-SEM and EDAX techniques. The X-ray diffraction revealed that the average crystalline size to be 79.78 and 22.84 nm. The band gap of SnO2/ZnO nanoparticle from Tauc′s plot was found to be 2.196 eV. The photocatalytic degradation of Indigo carmine dye follows the first order reaction. The antibacterial activity of SnO2 and SnO2/ZnO nanoparticles against Staphylococcus aureus and Escherichia coli was investigated.

Quenching of Growth of Zinc Oxide Nanoparticles by Adsorption of Organic Stabilizers

2004 ◽  
Vol 449-452 ◽  
pp. 1133-1136 ◽  
Author(s):  
Dong Un Seo ◽  
Cheng Zhu Lu ◽  
Ho Jung Chang ◽  
Sang Woo Joo
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Zinc Oxide ◽  
Zno Nanoparticles ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Zno Nanoparticle ◽  
Photoluminescence Spectra ◽  
Transmission Electron ◽  
Microscopy Images

We examined quenching of growth of ZnO nanoparticles with the injection of various organic surfactants. Aliphatic isocyanides as well as organothiols were found to adsorb on ZnO nanoparticle surfaces. For a carboxylate-terminated thiol, a retardation of growth appeared to be effective presumably due to the adsorption of the carboxylate COO- group on the ZnO surface. Photoluminescence spectra and transmission electron microscopy images were obtained for thiolcapped ZnO nanoparticles. The thiol-capped ZnO nanoparticles was found to fluoresce at the wavelength shorter by ~6 nm than those in the absence of any organic surfactants.

Preparation and Characterization of Vanadium-Doped ZnO Nanoparticles for Environmental Application

2011 ◽  
Vol 11 (1) ◽  
pp. 681-685 ◽  
Author(s):  
Hankwon Chang ◽  
Jonian Nikolov ◽  
Sun-Kyung Kim ◽  
Hee Dong Jang ◽  
Seng Lim ◽  
...  
Keyword(s):  
Zno Nanoparticles ◽  
Environmental Application ◽  
Doped Zno

ZINC OXIDE NANOPARTICLES FOR ULTRAVIOLET PHOTODETECTION

2011 ◽  
Vol 20 (01) ◽  
pp. 183-194 ◽  
Author(s):  
SHAYLA SAWYER ◽  
LIQIAO QIN ◽  
CHRISTOPHER SHING
Keyword(s):  
Zinc Oxide ◽  
Gallium Nitride ◽  
Zno Nanoparticles ◽  
Green Emission ◽  
Synthesis Process ◽  
Voltage Response ◽  
Zno Nanoparticle ◽  
Linear Current ◽  
Current Voltage ◽  
Lift Off

Zinc Oxide ( ZnO ) nanoparticles were created by a top-down wet-chemistry synthesis process ( ZnO - A ) and then coated with polyvinyl-alcohol (PVA) ( ZnO - U ). In ZnO - U , strong UV emission was apparent while the parasitic green emission, which normally appears in ZnO suspensions, was suppressed. A standard lift-off process via e-beam lithography was used to fabricate a detector by evaporating Aluminum ( Al ) as ohmic electrodes on the ZnO nanoparticle film. Photoconductivity experiments showed that linear current-voltage response were achieved and the ZnO - U nanoparticles based detector had a ratio of UV photo-generated current more than 5 times better than that of the ZnO - A based detector. In addition, non-linear current-voltage responses were observed when interdigitated finger Gold ( Au ) contacts were deposited on ZnO - U . The UV generated current to dark current ratios were between 4 and 7 orders of magnitude, showing better performance than the photodetector with Al contacts. ZnO - U were also deposited on Gallium Nitride ( GaN ) and Aluminum Gallium Nitride ( AlGaN ) substrates to create spectrally selective photodetectors. The responsivity of detector based on AlGaN is twice that of commercial UV enhanced Silicon photodiodes. These results confirmed that ZnO nanoparticles coating with PVA is a good material for small-signal, visible blind, and wavelength selective UV detection.

Effect of non-annealed and annealed ZnO on the optical properties of PVC/ZnO nanocomposite films

2021 ◽  
pp. 089270572110386
Author(s):  
Ali F Al-Shawabkeh ◽  
Ziad M Elimat ◽  
Khaleel N Abushgair
Keyword(s):  
Dielectric Constant ◽  
Refractive Index ◽  
Optical Properties ◽  
Zno Nanoparticles ◽  
Oscillator Strengths ◽  
Nanocomposite Films ◽  
Optical Parameters ◽  
Zno Nanoparticle ◽  
Dispersion Energy ◽  
Optical Susceptibility

The goal of this study was to investigate the optical properties of the prepared polyvinyl chloride (PVC)/zinc oxide (ZnO) nanocomposite films. The PVC/ZnO nanocomposite films consist of the addition of different concentrations with both non-annealed ZnO nanoparticles and ZnO nanoparticles annealed at temperature of 700°C. The PVC/ZnO nanocomposite films by weight concentrations of (0 wt.%, 2.5 wt.%, 5 wt.% and 10 wt.%) have been prepared by the casting method. The optical absorbance and transmittance values of the composites films were measured in the wavelength range between (250 to 1100 nm) at room temperature by using the UV-1800 Shimadzu spectrophotometer. The optical properties (absorption coefficient, dielectric constant, refractive index, and optical conductivity) have been investigated by the ultraviolet (UV) spectrophotometer. The optical parameters (direct optical energy gap, excitation energy for electronic transitions, the dispersion energy, static refractive index, static dielectric constant, optical oscillator strengths, the moments of optical spectrum, linear optical susceptibility, third-order nonlinear optical susceptibility, nonlinear refractive index, high-frequency dielectric constant, the carrier concentration to the effective mass ratio, the long wavelength refractive index and the plasma frequency) were calculated. The results showed that the optical properties behavior of the PVC/ZnO nanocomposite films was found to be dependent on the ZnO concentration, and photon wavelength. In addition, the results of the study show that the optical parameters can be influenced by alter the concentration of the nonannealed and annealed a ZnO nanoparticle in the PVC polymer matrix.

Sign in / Sign up

Export Citation Format

Share Document