Morphological, Structural and UV Sensing Properties of Fe-Doped ZnO Nanorods

2015 ◽  
Vol 1109 ◽  
pp. 200-204 ◽  
Author(s):  
Q. Humayun ◽  
U. Hashim
Keyword(s):  
Uv Light ◽  
Substrate Surface ◽  
Zno Nanorods ◽  
Preferential Orientation ◽  
Crystalline Quality ◽  
Current Gain ◽  
Fe Doping ◽  
Current Time ◽  
Sensing Applications ◽  
Doped Zno

Iron (Fe) doped ZnO nanorods were synthesized on glass substrate using a sol-gel hydrothermal growth method by adopting various concentration ratios of 0.8 at% Fe, 1 at% Fe and 3 at% Fe respectively. The X-ray diffraction (XRD) analysis show that all the grown ZnO nanorods have a hexagonal wurtzite structure and are preferentially oriented along the c-axis perpendicular to the substrate surface. At 3 at% Fe-doping, the crystalline quality and the preferential orientation of ZnO nanorods are improved and below 3 at% Fe-doping concentration crystalline quality and the preferential orientation of ZnO nanorods is weakened in turn. The surface morphology analysis of the samples show that the ZnO nanorods are grown vertically to the substrate surface and highly interconnected. Such interconnected network will facilitates the electron transport along the nanorods axis. Current-voltage and current-time characterization under the exposure of UV light ON/OFF sates with exhibited excellent current gain of 1.12 and good response/recovery time of 30 and 10 s showed that the fabricated device can be used for UV sensing applications.

Novel Synthesis of Nanorod ZnO and Fe-Doped ZnO by the Hydrolysis of Metal Powders

2007 ◽  
Vol 7 (11) ◽  
pp. 4158-4160 ◽  
Author(s):  
B. S. Han ◽  
Y. R. Uhm ◽  
G. M. Kim ◽  
C. K. Rhee
Keyword(s):  
Wave Length ◽  
Zno Nanorods ◽  
Fe Doping ◽  
Metal Powders ◽  
Resolution Limit ◽  
X Ray Diffraction ◽  
Fe Content ◽  
Doped Zno ◽  
Diffraction Patterns ◽  
Hydrolysis Of

Fe-doped ZnO nanorods have been synthesized by a novel process employing a hydrolysis of metal powders. Zn and Fe nano-powders were used as starting materials and incorporated into distilled water. The solution was refluxed at 60 °C for 24 h to obtain the precipitates from the hydrolysis of Zn and Fe. X-ray diffraction patterns for all the samples showed a pure wurtzite single phase, without any segregation of the Fe into the particulates within the instrumental resolution limit. The TEM results for ZnO with and without an Fe-doping showed that the produced powders had a rod-like shape. The rod shape was attributable to the zinc oxide from the hydrolysis of Zn. With an increasing Fe content, the UV–vis spectra were shifted to a long wave length and this result indicates that the band gap was changed by an Fe-doping.

Novel Synthesis of Nanorod ZnO and Fe-Doped ZnO by the Hydrolysis of Metal Powders

2007 ◽  
Vol 7 (11) ◽  
pp. 4158-4160
Author(s):  
B. S. Han ◽  
Y. R. Uhm ◽  
G. M. Kim ◽  
C. K. Rhee
Keyword(s):  
Wave Length ◽  
Zno Nanorods ◽  
Fe Doping ◽  
Metal Powders ◽  
Resolution Limit ◽  
X Ray Diffraction ◽  
Fe Content ◽  
Doped Zno ◽  
Diffraction Patterns ◽  
Hydrolysis Of

Fe-doped ZnO nanorods have been synthesized by a novel process employing a hydrolysis of metal powders. Zn and Fe nano-powders were used as starting materials and incorporated into distilled water. The solution was refluxed at 60 °C for 24 h to obtain the precipitates from the hydrolysis of Zn and Fe. X-ray diffraction patterns for all the samples showed a pure wurtzite single phase, without any segregation of the Fe into the particulates within the instrumental resolution limit. The TEM results for ZnO with and without an Fe-doping showed that the produced powders had a rod-like shape. The rod shape was attributable to the zinc oxide from the hydrolysis of Zn. With an increasing Fe content, the UV–vis spectra were shifted to a long wave length and this result indicates that the band gap was changed by an Fe-doping.

Synthesis and Characterization of Zinc Oxide Nanostructured by Electrochemical Deposition Method

2012 ◽  
Vol 576 ◽  
pp. 573-576
Author(s):  
A.S. Rodzi ◽  
M.N. Berhan ◽  
M. Rusop
Keyword(s):  
Zinc Oxide ◽  
Ultrasonic Wave ◽  
Electrochemical Deposition ◽  
Uv Light ◽  
Zno Nanorods ◽  
Driving Frequency ◽  
Deposition Method ◽  
Time Curve ◽  
Current Time ◽  
Electrochemical Deposition Method

Zinc Oxide (ZnO) nanostructured was successfully synthesis by electrochemical deposition method. In this paper present the ZnO nanorods growth in a zinc nitrate/hexamethylenetetramine solution at 90°C with different potential applied. The effect of the growth process was investigated by the cyclic voltametric curve and the current-time curve. The structural of ZnO nanorods evidence that it has single crystalline, a wurtzite crystal structure with markedly preferential orientation along (001) direction was measured x-ray diffraction. The observation of ZnO nanorods was measured on field emission scanning electron microscopy that diameter of ZnO rods were below than 100 nm sizes. Uv-Vis spectrophotometer used to determine the transparency of ZnO nanorods through the UV light. The ZnO nanorods show the average transmittance (<90%) for all potential applied. The piezoelectric property of ZnO nanorods were measuring connected with two electrodes to the metal contact on the film that was driven by an ultrasonic wave. The piezoelectric output current was gained and characteristics curve have been illustrated for different voltage with constant driving frequency of ultrasonic wave at 40 kHz.

Sol–gel synthesis of Pd doped ZnO nanorods for room temperature hydrogen sensing applications

2013 ◽  
Vol 39 (6) ◽  
pp. 6461-6466 ◽  
Author(s):  
M. Kashif ◽  
M.E. Ali ◽  
Syed M. Usman Ali ◽  
U. Hashim
Keyword(s):  
Room Temperature ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Hydrogen Sensing ◽  
Sensing Applications ◽  
Doped Zno ◽  
Sol Gel Synthesis

scholarly journals Enhanced Ultraviolet Photodetector Based on Mg-Doped ZnO Nanorods Films

2019 ◽  
Vol 29 (3) ◽  
pp. 158 ◽  
Author(s):  
Hussein Abdullah Hameed
Keyword(s):  
Uv Light ◽  
Zno Nanorods ◽  
Optical Absorption Spectroscopy ◽  
Near Band Edge ◽  
X Ray Diffraction ◽  
X Ray ◽  
Glass Substrates ◽  
Metal Semiconductor Metal ◽  
Doped Zno ◽  
Mg Doped

Magnesium-doped zinc oxide (ZnO: Mg) nanorods and nanotubes films were prepared by hydrothermal method deposited on glass substrates. X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), photoluminescence (PL), and optical absorption spectroscopy (UV) were performed to characterize the prepared films. X-ray diffraction analysis showed a decrease in the lattice parameters of Mg doped ZnO NRs. The Photoluminescence of the undoped and Mg-doped ZnO NRs displayed a near band edge. At 10 V bias, the metal-semiconductor-metal (MSM) ultraviolet (UV) photodetector performance of the Mg-doped ZnO prepared for various Mg concentrations of 0.0, 0.02, and 0.06 was investigated under radiation of 40μW/cm2 at the wavelengths of 365 and 385 nm UV light. The responsivity, detectivity and quantum efficiency of Mg-doped based on MSM detector were 0.118A/W, 1.0579*1012 and 40.05157 under UV of wavelength 365nm respectively.

Properties of Al-Doped ZnO Nanorods Synthesized Using Low Temperature Hydrothermal Method

2016 ◽  
Vol 846 ◽  
pp. 459-464 ◽  
Author(s):  
Nur Syafinaz Ridhuan ◽  
Zainovia Lockman ◽  
Azlan Abdul Aziz ◽  
Khairunisak Abdul Razak
Keyword(s):  
Low Temperature ◽  
Hydrothermal Reaction ◽  
Uv Light ◽  
Average Length ◽  
Zno Nanorods ◽  
Average Diameter ◽  
Dark Condition ◽  
Al Doping ◽  
Uv Illumination ◽  
Doped Zno

This work describes the growth of 1-D Al-doped ZnO nanorods via low temperature hydrothermal reaction on seeded substrates. The amount of Al doped ZnO nanorods were tuned by using different concentration of aluminum nitrate from 1-20 mM. The optimum 5 mM Al doping produced an arrays of sharp-tip nanorods with average length of ~1.16 μm and average diameter of ~118 nm. I-V characteristic of the Al-doped ZnO nanorods fabricated onto Al electrodes were observed under UV illumination and dark condition. The change in photoconductivity of Al-doped ZnO nanorods under UV light was found two orders of times higher compared to ZnO nanorods. Different concentrations of aluminium doped ZnO nanorods UV sensing showed response to UV light but with different sensing value. 5 mM Al-doped ZnO showed high responsivity of fabricated UV sensing at 3V with 23.56 A/W which was higher compared to other concentrations. This suggested that the responsivity of Al-doped ZnO NRs UV sensing could be controlled to some extent by controlling the percentage of Al-doped.

scholarly journals Influence of Seed Layer Surface Position on Morphology and Photocatalysis Efficiency of ZnO Nanorods and Nanoflowers

2020 ◽  
Vol 2020 ◽  
pp. 1-9 ◽  
Author(s):  
Fouzia Bourfaa ◽  
Abderhamane Boutelala ◽  
Mohamed Salah Aida ◽  
Nadir Attaf ◽  
Yusuf Selim Ocak
Keyword(s):  
Seed Layer ◽  
High Efficiency ◽  
Uv Light ◽  
Substrate Surface ◽  
Zno Nanorods ◽  
Growth Time ◽  
Layer Surface ◽  
Wurtzite Phase ◽  
Preferential Growth ◽  
Large Rate Constant

ZnO nanorods and nanoflowers were synthesized by a hydrothermal method via different surface substrate positions at 120°C for 3 h as a growth time. The influence of seed layer surface position on the growth of ZnO nanostructures was observed by the variation of ZnO morphologies from nanorods to nanoflowers. Both analyses XRD and EDS proved the pure wurtzite phase with high crystallinity quality and preferential growth along the c-axis. As displayed from the scanning of surface morphology through SEM, a large amount of ZnO nanorods and nanoflowers were deposited on the full substrate surface. Diverse ZnO photocatalysts were used to study the photodegradation of Methylene Blue (MB) dye by UV light. The organic dye MB was decolorized by the most efficient photocatalyst among the ZnO-tested nanostructures. The results showed an improvement of the degradability of this dye from 54% to 81% for ZnO nanoflowers compared to nanorods. Thus, ZnO nanoflowers are the best photocatalyst which have the high efficiency photodegradation and the large rate constant.

Hydrothermally Grown Copper-Doped ZnO Nanorods on Flexible Substrate

2019 ◽  
Vol 14 (11) ◽  
pp. 1503-1511 ◽  
Author(s):  
Hafiz Muhammad Salman Ajmal ◽  
Waqar Khan ◽  
Fasihullah Khan ◽  
Noor-ul Huda ◽  
Sam-Dong Kim
Keyword(s):  
Photoelectron Spectroscopy ◽  
Flexible Substrate ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Atomic Ratio ◽  
Crystalline Quality ◽  
Near Band Edge ◽  
Band Edge Emission ◽  
X Ray ◽  
Doped Zno

In this study, we observe the effect of Cu doping on the ZnO nanorod (NR) structure grown on a polyethylene terephthalate flexible substrates by hydrothermal growth of sol–gel method proceeded at 150 °C. Copper (II) nitrate trihydrate (Cu-nitrate) and copper (II) acetate monohydrate (Cu-acetate) are employed as precursors for Cu dopants in aqueous growth solution to examine the evolutionary change of the growth morphology, optical characteristics, and chemical composition of as-grown ZnO NRs. A significant influence of dopant molarity on the morphology of wurtzite ZnO nanocrystals is observed by field-emission scanning electron microscopy. X-ray diffraction analysis also reveals more enhanced crystalline quality from Cu-doped NR crystals prepared by Cu-acetates than that grown with Cu-nitrate precursor. Near band-edge emission of 2 mM Cu-acetate doped NRs is greatly enhanced by 2.5 times compared to those grown with Cu-nitrate precursors. A great reduction in visible emissions is also realized, and this phenomenon is associated with overall improvement in NR crystalline quality by suppressing the oxygenated carbon groups or hydroxyl introduced by the aqueous solution-based growth. X-ray photoelectron spectroscopy also shows that a very high O/Zn atomic ratio of 0.73 can be achieved in the case of NR crystals prepared by 2 mM Cu-acetate. Cu doped ZnO nanostructures of improved optical and structural properties achieved in this study can be utilized in the wide emerging field of flexible device applications such as laser diodes, light-emitting diodes, piezoelectric transducers and generators, gas sensors, and ultraviolet detectors.

Enhancement of Triboactivity of Nanolamellar Graphitic-C3N4 by N-Doped ZnO Nanorods

2021 ◽  
Vol 60 (2) ◽  
pp. 864-874
Author(s):  
Alok K. Singh ◽  
Nivedita Shukla ◽  
Dinesh K. Verma ◽  
Kavita ◽  
Bharat Kumar ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Doped Zno
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