Structural and Optical Properties of Fe-Doped ZnO Nanorods

2013 ◽  
Vol 858 ◽  
pp. 151-158
Author(s):  
Siti Nor Qurratu Aini Abd Aziz ◽  
Swee Yong Pung ◽  
Zainovia Lockman ◽  
Nur Atiqah Hamzah
Keyword(s):  
Average Length ◽  
Spray Pyrolysis Technique ◽  
Zno Nanorods ◽  
Chemical Vapor ◽  
Horizontal Tube ◽  
Areal Density ◽  
Zinc Oxide Nanorods ◽  
Ex Situ ◽  
Aerosol Generator ◽  
Doped Zno

Fe-doped zinc oxide nanorods (ZnO NRs) were synthesized by ex-situ doping using spray pyrolysis technique. In this work, the undoped ZnO NRs were pre-synthesized via chemical vapor deposition using Zn powder and oxygen gas at 650 °C. The average length and diameter of the ZnO NRs are 4.1 ± 1.1 μm and 553.1 ± 89.6 nm, respectively. The average aspect ratio and areal density of ZnO NRs is 8.2 ± 2.9 and 6.2 ± 1.1 NRs/um2, respectively. Subsequently, these undoped ZnO NRs were kept in the horizontal tube furnace, whereas the dopant solution (FeCl3) of 0.05 M concentration was kept in the aerosol generator, which was located outside of the furnace. The Fe aerosol was flowed into the reactor when substrate temperature reached 650 °C to achieve ex-situ doping. At this temperature, some of the Fe atoms were driven into the NRs, forming Fe-doped ZnO NRs particularly at their outer layer. The presence of Fe 2p1/2 and Fe 2p3/2 peaks at 722.3 eV and 705.7 eV in XPS analysis indicates that Fe atoms were in the local structure of FeO. The Fe-doped ZnO NRs have poor crystal quality attributed to the low IUV/IVis ratio in room temperature PL analysis.

Ex Situ Doping of ZnO Nanorods by Spray Pyrolysis Technique

2013 ◽  
Vol 756 ◽  
pp. 16-23 ◽  
Author(s):  
Siti Nor Qurratu Aini Abd Aziz ◽  
Swee Yong Pung ◽  
Zainovia Lockman ◽  
Nur Atiqah Hamzah ◽  
Yim Leng Chan
Keyword(s):  
Zinc Oxide ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Ex Situ ◽  
Violet Emission ◽  
Agent Based ◽  
Oxide Nanorods ◽  
Doped Zno

An ultraviolet (UV) shielding agent based on Fe-doped zinc oxide nanorods (ZnONRs) was synthesized by ex-situdoping using spray pyrolysis technique. These Fe-doped ZnO NRs could reduce the inherent photocatalytic activity of zinc oxide while still maintaining their ultraviolet filtering capability. In this work, the effect of doping duration by spray pyrolysis technique on the optical property and photocatalytic efficiency of ZnO NRs was studied. The room temperature photoluminescence (PL) analysis on the Fe-doped ZnO NRs indicates the red-shift of violet emission peak, i.e. from 378.97 nm (undoped) to 381.86 nm (60 mins.doping). Besides, the reduction of IUV/Vis ratio of PL reveals that the ex-situ Fe doping deteriorated the crystal quality of ZnO NRs. The photocatalytic study shows that the rate constant of Fe-doped ZnO NRs was smaller than the undoped ZnO NRs. It means that the Fe-doped ZnO NRs were less effective in degrading the RhB solution.

scholarly journals High performance Ce-doped ZnO nanorods for sunlight-driven photocatalysis

2016 ◽  
Vol 7 ◽  
pp. 1338-1349 ◽  
Author(s):  
Bilel Chouchene ◽  
Tahar Ben Chaabane ◽  
Lavinia Balan ◽  
Emilien Girot ◽  
Kevin Mozet ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Average Length ◽  
High Surface ◽  
Zno Nanorods ◽  
High Surface Area ◽  
Visible Region ◽  
Solar Light ◽  
Effective Electron ◽  
Doped Zno ◽  
Zno Rods

Ce-doped ZnO (ZnO:Ce) nanorods have been prepared through a solvothermal method and the effects of Ce-doping on the structural, optical and electronic properties of ZnO rods were studied. ZnO:Ce rods were characterized by XRD, SEM, TEM, XPS, BET, DRS and Raman spectroscopy. 5% Ce-doped ZnO rods with an average length of 130 nm and a diameter of 23 nm exhibit the highest photocatalytic activity for the degradation of the Orange II dye under solar light irradiation. The high photocatalytic activity is ascribed to the substantially enhanced light absorption in the visible region, to the high surface area of ZnO:Ce rods and to the effective electron–hole pair separation originating from Ce doping. The influence of various experimental parameters like the pH, the presence of salts and of organic compounds was investigated and no marked detrimental effect on the photocatalytic activity was observed. Finally, recyclability experiments demonstrate that ZnO:Ce rods are a stable solar-light photocatalyst.

Optical Properties of Al Doped Zinc Oxide Nanorods Thin Film Deposited by Immersion Technique

2013 ◽  
Vol 667 ◽  
pp. 388-392
Author(s):  
S.Z. Muhamed ◽  
Mohamad Hafiz Mamat ◽  
Mohamad Rusop
Keyword(s):  
Thin Film ◽  
Zinc Oxide ◽  
Electrical Properties ◽  
Surface Morphology ◽  
Immersion Time ◽  
Zno Nanorods ◽  
Zinc Oxide Nanorods ◽  
Oxide Nanorods ◽  
Immersion Technique ◽  
Doped Zno

We investigated the effect of immersion time on optical, electrical properties and surface morphology of nanostructured Aluminium (Al) doped Zinc Oxide (ZnO) thin films prepared by immersion technique. UV-Vis-NIR spectra indicate that the transmittance of the samples decrease with immersion time. Electrical properties study reveals the nanostructured Al doped ZnO thin film at 1 hr shows the lowest resistivity compared to other samples. Surface morphology results as characterized by scanning electron microscope (SEM) show that the Al doped ZnO nanorods quantity increased with immersion time.

Photoluminescence of Ga-doped ZnO nanorods prepared by chemical vapor deposition

2008 ◽  
Vol 31 (2) ◽  
pp. 237-240 ◽  
Author(s):  
Liping Zhu ◽  
Jiesheng Li ◽  
Zhizhen Ye ◽  
Haiping He ◽  
Xiaojun Chen ◽  
...  
Keyword(s):  
Chemical Vapor Deposition ◽  
Vapor Deposition ◽  
Zno Nanorods ◽  
Chemical Vapor ◽  
Doped Zno

scholarly journals Fabrication and Characterization of Highly Oriented N-Doped ZnO Nanorods by Selective Area Epitaxy

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Yang Zhang ◽  
Shulin Gu ◽  
Kun Tang ◽  
Jiandong Ye ◽  
Haixiong Ge ◽  
...  
Keyword(s):  
Nanoimprint Lithography ◽  
Zno Nanorods ◽  
Volume Ratio ◽  
Chemical Vapor ◽  
Chemical Vapor Transport ◽  
Selective Area Epitaxy ◽  
Doped Zno ◽  
The Difference ◽  
N Incorporation ◽  
Raman Scattering Spectra

High-quality nitrogen-doped ZnO nanorods have been selectively grown on patterned and bare ZnO templates by the combination of nanoimprint lithography and chemical vapor transport methods. The grown nanorods exhibited uniformity in size and orientation as well as controllable density and surface-to-volume ratio. The structural and optical properties of ZnO nanorods and the behaviour of N dopants have been investigated by means of the scanning electron microscope, photoluminescence (PL) spectra, and Raman scattering spectra. The additional vibration modes observed in Raman spectra of N-doped ZnO nanorods provided solid evidence of N incorporation in ZnO nanorods. The difference of excitonic emissions from ZnO nanorods with varied density and surface-to-volume ratio suggested the different spatial distribution of intrinsic defects. It was found that the defects giving rise to acceptor-bound exciton (A0X) emission were most likely to distribute in the sidewall surface with nonpolar characteristics, while the donor bound exciton (D0X) emission related defects distributed uniformly in the near top polar surface.

Novel Inorganic DC Lateral Thin Film Electroluminescent Devices Composed of ZnO Nanorods and ZnS Phosphor

2008 ◽  
Vol 1144 ◽  
Author(s):  
Tomomasa Satoh ◽  
Yuki Matsuzawa ◽  
Hiroaki Koishikawa ◽  
Takashi Hirate
Keyword(s):  
Thin Film ◽  
Zno Nanorods ◽  
Composite Layer ◽  
Chemical Vapor ◽  
Driving Voltage ◽  
Electroluminescent Devices ◽  
Dc Voltage ◽  
Thermal Chemical Vapor Deposition ◽  
Doped Zno ◽  
Beam Deposition

ABSTRACTA novel inorganic thin-film electroluminescence (TFEL) device exhibiting bright EL emission when driven by a low DC voltage is demonstrated. The DC-TFEL device is based on a composite layer in which aluminum-doped ZnO nanorods are vertically embedded in ZnS:Mn as an EL phosphor. The DC driving voltage is then applied laterally to the composite layer via two side electrodes set 3.5 mm apart. The aluminum-doped ZnO nanorods were synthesized on a glass substrate by low-pressure thermal chemical vapor deposition combined with laser ablation, and the composite layer was formed by electron-beam deposition of ZnS:Mn onto the ZnO nanorods. The thickness of the composite layer was about 160 nm. After electrical modification to breakdown a basal conduction ZnO path, the lateral DC-TFEL device exhibited bright EL emission without avalanche breakdown, achieving a luminance of 747 cd/m2 at 4200 V with a luminous efficiency of 9.2×10−3 lm/W.

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