scholarly journals Study on the effect of HMTA and ZnO seed layer on the morphology of ZnO nanorods synthesized by electrochemical method

2013 ◽  
Vol 16 (4) ◽  
pp. 13-21
Author(s):  
Hoang Cao Son Tran ◽  
Khac Top Le ◽  
Thi Dong Tri Nguyen ◽  
Luong Cuong Hoang ◽  
Kien Quoc Luu ◽  
...  
Keyword(s):  
Seed Layer ◽  
Electrochemical Method ◽  
Saline Solution ◽  
Zno Nanorods ◽  
Electrolysis Time ◽  
Step Method ◽  
Sem Images ◽  
Lattice Network ◽  
Stable Flow ◽  
Orientation Growth

In this paper we investigated the effect of Hexamethylenetetramine (HMTA, C6H12N4) concentration on the growth of ZnO nanorods on ITO substrates and the influence of the ZnO seed layer on its orientation growth. ZnO nanorods were synthesized by the two-step method of stable flow electrochemical method of saline solution Zn(NO3)2 at 90oC. As result, the high hexagonal crystalline ZnO nanorods were well oriented according to the (002) lattice network. The change of amperage and electrolysis time have show the effetive control of morphology and size of ZnO nanorods which has been studied by XRD and SEM images

scholarly journals Synthesis of ZnO nanorods on ZnO/ITO seed layer by electrochemical method and its application in solar cell device

2013 ◽  
Vol 16 (4) ◽  
pp. 5-12
Author(s):  
Hoang Cao Son Tran ◽  
Khac Top Le ◽  
Duc Hao Nguyen ◽  
Thi Dong Tri Nguyen ◽  
Kien Quoc Luu ◽  
...  
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Electrochemical Method ◽  
Zno Nanorods ◽  
Hybrid Solar Cells ◽  
X Ray Diffraction ◽  
Solar Cell Device ◽  
Sem Images ◽  
X Ray ◽  
Stable Flow

In this paper, we study on the effects of ZnO nanorods /seed ZnO on properties of hybrid solar cells. ZnO nanorods fabricated by electrochemical method of two-step stable flow of liquid Zn(NO3)2. 6H2O (0.005 M) and C6H12N4 (0.005 M). Morphology and optoelectronic properties of ZnO nanorods were studied by SEM images, UV-VIS transmission spectra, X-ray diffraction and photoluminescence spectrum. Elaboration of hybrid solar cells by inserting ZnO nanorods on organic photoactive layer of P3HT:PCBM and ITO, as result the solar cell conductivity performance is significantly improved. Experimental results show that ~ 1,392 mA/cm2 Jsc, Voc ~ 0.49 V, FF = 0.32, and PCE = 0.23%.

scholarly journals ZnO (Ag-N) Nanorods Films Optimized for Photocatalytic Water Purification

Coatings ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 767 ◽  
Author(s):  
Luis Sanchez ◽  
Carlos Castillo ◽  
Willy Cruz ◽  
Bryan Yauri ◽  
Miguel Sosa ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Seed Layer ◽  
Zno Nanorods ◽  
Metallic Silver ◽  
Silver Nanostructures ◽  
X Ray Diffraction ◽  
Sem Images ◽  
X Ray ◽  
Mean Diameter ◽  
The Mean

ZnO nanorods (NRs) films, nitrogen-doped (ZnO:N), and ZnO doped with nitrogen and decorated with silver nanostructures (ZnO:N-Ag) NRs films were vertically supported on undoped and N doped ZnO seed layers by a wet chemical method. The obtained films were characterized structurally by X-ray diffraction. Morphological and elemental analysis was performed by scanning electron microscopy, including an energy dispersive X-ray spectroscopy facility and their optical properties by Ultraviolet-Visible Spectroscopy. Analysis performed in the NRs films showed that the nitrogen content in the seed layer strongly affected their structure and morphology. The mean diameter of ZnO NRs ranged from 70 to 190 nm. As the nitrogen content in the seed layer increased, the mean diameter of ZnO:N NRs increased from 132 to 250 nm and the diameter dispersion decreased. This diameter increase occurs simultaneously with the incorporation of nitrogen into the ZnO crystal lattice and the increase in the volume of the unit cell, calculated using the X-ray diffraction patterns and confirmed by a slight shift in the XRD angle. The diffractograms indicated that the NRs have a hexagonal wurtzite structure, with preferential growth direction along the c axis. The SEM images confirmed the presence of metallic silver in the form of nanoparticles dispersed on the NRs films. Finally, the degradation of methyl orange (MO) in an aqueous solution was studied by UV-vis irradiation of NRs films contained in the bulk of aqueous MO solutions. We found a significant enhancement of the photocatalytic degradation efficiency, with ZnO:N-Ag NRs film being more efficient than ZnO:N NRs film, and the latter better than the ZnO NRs film.

EFFECT OF PRE-HEATING AND SEED LAYER ON HYDROTHERMAL GROWTH AND OPTICAL PROPERTIES OF ZINC OXIDE NANORODS

2011 ◽  
Vol 10 (04n05) ◽  
pp. 845-849
Author(s):  
GAURAV SHUKLA ◽  
ALIKA KHARE
Keyword(s):  
Optical Properties ◽  
Seed Layer ◽  
Zno Nanorods ◽  
Pulsed Laser ◽  
Heating Time ◽  
Hydrothermal Growth ◽  
Zinc Oxide Nanorods ◽  
Growth Time ◽  
Oxide Nanorods ◽  
Reported Effect

Hydrothermal growth of highly c-axis oriented ZnO nanorods with high aspect ratio on pulsed laser deposited ZnO seed layer is reported. Effect of pre-heating time, growth time and seed layer on the structural, morphological and optical properties of ZnO nanorods is presented. The possible growth mechanism for ZnO nanorods is also discussed.

Hierarchical growth of ZnO nanorods over SnO2 seed layer: insights into electronic properties from photocatalytic activity

RSC Advances ◽  
2016 ◽  
Vol 6 (3) ◽  
pp. 2112-2118 ◽  
Author(s):  
Luís F. Da Silva ◽  
Osmando F. Lopes ◽  
Ariadne C. Catto ◽  
Waldir Avansi ◽  
Maria I. B. Bernardi ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Electronic Properties ◽  
Hydrothermal Treatment ◽  
Charge Separation ◽  
Seed Layer ◽  
Photocatalytic Performance ◽  
Zno Nanorods

The ZnO–SnO2 heterojunction catalyst was prepared via a hydrothermal treatment route. The heterojunction exhibited a superior photocatalytic performance in comparison to SnO2 and ZnO, attributed to the good charge separation.

scholarly journals Effects of LaNiO3 Seed Layer on the Microstructure and Electrical Properties of Ferroelectric BZT/PZT/BZT Thin Films

2021 ◽  
Vol 8 ◽  
Author(s):  
Jinyu Ruan ◽  
Chao Yin ◽  
Tiandong Zhang ◽  
Hao Pan
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Surface Roughness ◽  
Electrical Properties ◽  
Seed Layer ◽  
Ferroelectric Properties ◽  
Lower Surface ◽  
Multilayer Films ◽  
Multilayer Thin Films ◽  
Orientation Growth

Ferroelectric multilayer films attract great attention for a wide variation of applications. The synergistic effect by combining different functional layers induces distinctive electrical properties. In this study, ferroelectric BaZr0.2Ti0.8O3/PbZr0.52Ti0.48O3/BaZr0.2Ti0.8O3 (BZT/PZT/BZT) multilayer thin films are designed and fabricated by using the magnetron sputtering method, and a LaNiO3 (LNO) seed layer is introduced. The microstructures and electrical properties of the BZT/PZT/BZT films with and without the LNO seed layer are systematically studied. The results show that the BZT/PZT/BZT/LNO thin film exhibits much lower surface roughness and a preferred (100)-orientation growth, with the growth template and tensile stress provided by the LNO layer. Moreover, an enhanced dielectric constant, decreased dielectric loss, and improved ferroelectric properties are achieved in BZT/PZT/BZT/LNO thin films. This work reveals that the seed layer can play an important role in improving the microstructure and properties of ferroelectric multilayer films.

scholarly journals Semi-Interpenetrating Polymer Networks Based on Cyanate Ester and Highly Soluble Thermoplastic Polyimide

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 862 ◽  
Author(s):  
Jingfeng Liu ◽  
Weifeng Fan ◽  
Gewu Lu ◽  
Defeng Zhou ◽  
Zhen Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Elevated Temperatures ◽  
Polymer Networks ◽  
Gelation Time ◽  
Interpenetrating Polymer Networks ◽  
Step Method ◽  
Scanning Calorimetry ◽  
Sem Images ◽  
Biphenyltetracarboxylic Dianhydride ◽  
The Impact

Thermoplastic polyimide (TPI) was synthesized via a traditional one-step method using 2,3,3′,4′-biphenyltetracarboxylic dianhydride (3,4′-BPDA), 4,4′-oxydianiline (4,4′-ODA), and 2,2′-bis(trifluoromethyl)benzidine (TFMB) as the monomers. A series of semi-interpenetrating polymer networks (semi-IPNs) were produced by dissolving TPI in bisphenol A dicyanate (BADCy), followed by curing at elevated temperatures. The curing reactions of BADCy were accelerated by TPI in the blends, reflected by lower curing temperatures and shorter gelation time determined by differential scanning calorimetry (DSC) and rheological measurements. As evidenced by scanning electron microscopy (SEM) images, phase separation occurred and continuous TPI phases were formed in semi-IPNs with a TPI content of 15% and 20%. The properties of semi-IPNs were systematically investigated according to their glass transition temperatures (Tg), thermo-oxidative stability, and dielectric and mechanical properties. The results revealed that these semi-IPNs possessed improved mechanical and dielectric properties compared with pure polycyanurate. Notably, the impact strength of semi-IPNs was 47%–320% greater than that of polycyanurate. Meanwhile, semi-IPNs maintained comparable or even slightly higher thermal resistance in comparison with polycyanurate. The favorable processability and material properties make TPI/BADCy blends promising matrix resins for high-performance composites and adhesives.

PERFORMANCE OF pH SENSOR ELECTRODE BASED ON ZnO NRs ON FTO-GLASS SUBSTRATE

2020 ◽  
Vol 27 (08) ◽  
pp. 1950198
Author(s):  
ABDULQADER D. FAISAL ◽  
MOHAMMAD O. DAWOOD ◽  
HASSAN H. HUSSEIN ◽  
KHALEEL I. HASSOON
Keyword(s):  
Seed Layer ◽  
Zno Nanorods ◽  
Ph Sensor ◽  
High Sensitivity ◽  
Hydrothermal Growth ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zno Nanocrystals ◽  
Electrode Cell ◽  
Fto Glass

In this work, ZnO nanorods (ZnO NRs) were successfully synthesized on FTO-glass via hydrothermal technique. Two steps were followed to grow ZnO NRs. In the first step, the seed layer of ZnO nanocrystals was deposited by using a drop cast method. The second step was represented by the hydrothermal growth of ZnO NRs on a pre-coated FTO- glass with the seed layer. The hydrothermal growth was conducted at 90∘C for 2[Formula: see text]h. The resulted structure, morphology and optical properties of the produced layers were analyzed by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM) equipped with energy dispersive X-ray (EDX) and UV-visible spectrophotometer, respectively. The analysis confirmed that the ZnO NRs grown by the hydrothermal method have a hexagonal crystal structure which was grown randomly on the FTO surface. The crystallite size was recorded 50[Formula: see text]nm and a slight microstrain (0.142%) was calculated. The bandgap was found to be in the range of 3.14–3.17[Formula: see text]eV. The ZnO NRs have a high density and large aspect ratio. A pH sensor with high sensitivity was fabricated using a two-electrode cell configuration. The ZnO NRs sensor showed the sensitivity of [Formula: see text]59.03[Formula: see text]mV/pH, which is quite promising and close to the theoretical value ([Formula: see text]59.12[Formula: see text]mV/pH).

scholarly journals Facile Preparation and Enhanced Visible-Light Photocatalysis of ZnO Arrays@BiOI Nanosheets Heterostructures

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Da Zhang ◽  
Yuanyi Wang ◽  
Liang Chen ◽  
Chengjing Xiao ◽  
Jing Feng ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Visible Light ◽  
Zno Nanorods ◽  
Potential Method ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Step Method ◽  
X Ray ◽  
Bioi Nanosheets

A simple two-step method of growing ZnO nanorod arrays on the surface of BiOI nanosheets was developed under mild environment. The hierarchical structure of ZnO arrays@BiOI nanosheets was characterized by various measurements like X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray detector. The optical absorption of the ZnO arrays@BiOI nanosheets composite was investigated by UV-Vis diffuse reflectance spectra. The photocatalytic degradation of methanol orange under visible light shows that the obtained ZnO arrays@BiOI nanosheets heterostructures exhibit enhanced photocatalytic activity, contrasting to the sum of BiOI nanosheets and ZnO nanorods. The mechanism of the photocatalytic process was discussed. This method of growing ZnO nanorod arrays on other nanosheets also provides a potential method to fabricating other complex structures.

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