scholarly journals Flexible hybrid structure piezoelectric nanogenerator based on ZnO nanorod/PVDF nanofibers with improved output

RSC Advances ◽  
2019 ◽  
Vol 9 (18) ◽  
pp. 10117-10123 ◽  
Author(s):  
Parisa Fakhri ◽  
Babak Amini ◽  
Roohollah Bagherzadeh ◽  
Mohammad Kashfi ◽  
Masoud Latifi ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Hybrid Structure ◽  
Zno Nanorod ◽  
Practical Applications ◽  
Piezoelectric Structure ◽  
Mechanical Movement

A novel hybrid piezoelectric structure based on electrospun PVDF NFs and vertically grown ZnO nanorods is presented as a promising nanogenerator to convert mechanical movement more efficiently into electricity for practical applications.

Synthesis of ZnO Nanorod Arrays on Chaleted Sol-Gel-Derived ZnO Thin Films and its Optical Absorption in Visible-Light Region

2013 ◽  
Vol 750-752 ◽  
pp. 253-258
Author(s):  
Li Rong Yang ◽  
Jun Cong Wei ◽  
Li Zhang ◽  
Hai Bin Chen
Keyword(s):  
Thin Films ◽  
Visible Light ◽  
Sol Gel ◽  
Zno Nanorods ◽  
Zno Thin Films ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Practical Applications ◽  
Absorbance Spectra

Well-aligned ZnO nanorod arrays on Chaleted Sol-Gel-Derived ZnO thin films was achieved at a temperature of 90°C by a surfactant-assisted soft chemical approach. The nanorod arrays were characterized by XRD, SEM, XPS, and UV-Vis absorbance spectra. The ZnO nanorod arrays are wurtzite crystal stuctures preferentially orienting in the direction of the c-axis and ZnO nanorods are grown verticallyon the substrate. The XPS analysis shows the Zn:O ratio of ZnO nanorod arrays near is 1:1. The UV-Vis absorbance spectra indicate that ZnO nanorod arrays have absorption of visible-light as well as ultraviolet-light. Therefore, the ZnO nanorods may be good candidates for visible-light photocatalysis materials from the viewpoint of practical applications.

scholarly journals The Multisensor Array Based on Grown-On-Chip Zinc Oxide Nanorod Network for Selective Discrimination of Alcohol Vapors at Sub-ppm Range

Sensors ◽  
2019 ◽  
Vol 19 (19) ◽  
pp. 4265 ◽  
Author(s):  
Anton Bobkov ◽  
Alexey Varezhnikov ◽  
Ilya Plugin ◽  
Fedor S. Fedorov ◽  
Vanessa Trouillet ◽  
...  
Keyword(s):  
Zno Nanorods ◽  
Zno Nanorod ◽  
Proof Of Concept ◽  
Hydrothermal Route ◽  
Linear Discriminant ◽  
Practical Applications ◽  
Reasonable Degree ◽  
Highly Sensitive ◽  
On Chip ◽  
Vector Signal

We discuss the fabrication of gas-analytical multisensor arrays based on ZnO nanorods grown via a hydrothermal route directly on a multielectrode chip. The protocol to deposit the nanorods over the chip includes the primary formation of ZnO nano-clusters over the surface and secondly the oxide hydrothermal growth in a solution that facilitates the appearance of ZnO nanorods in the high aspect ratio which comprise a network. We have tested the proof-of-concept prototype of the ZnO nanorod network-based chip heated up to 400 °C versus three alcohol vapors, ethanol, isopropanol and butanol, at approx. 0.2–5 ppm concentrations when mixed with dry air. The results indicate that the developed chip is highly sensitive to these analytes with a detection limit down to the sub-ppm range. Due to the pristine differences in ZnO nanorod network density the chip yields a vector signal which enables the discrimination of various alcohols at a reasonable degree via processing by linear discriminant analysis even at a sub-ppm concentration range suitable for practical applications.

Multilayer Hybrid Structure of ZnO Nanorod Arrays Imbedded in TiO2 Network as Photoanode

2013 ◽  
Vol 1493 ◽  
pp. 111-116
Author(s):  
Chan-yan Huang ◽  
Yan Sun ◽  
Xin Chen ◽  
Ning Dai
Keyword(s):  
Electrical Properties ◽  
Electrochemical Impedance ◽  
Zno Nanorods ◽  
Hydrothermal Process ◽  
Hybrid Structure ◽  
Electrochemical Impedance Spectrum ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Effective Electron

ABSTRACTWe developed a multilayer hybrid structure by imbedding ZnO nanorod arrays in TiO2 network for each layer, for the pourese of taking ZnO nanorods as the highway of electron transport. ZnO nanorods can be prepared by hydrothermal process, which is simple, low cost and easy control. The ZnO nanorod arrays were grown by reported hydrothermal method, then TiO2 network was constructed by spin-coating titanium precursor sol on ZnO nanorod arrays and calcining. The electrochemical impedance spectrum measurements were taken to study the electrical properties of this kind of hybrids, and the results indicated that the effective electron lifetime reaches a magnitude of microsecond which is similar to the pure ZnO nanorod arrays. It reveals to us that ZnO nanorods may dominate the electrical properties of this nano-hybrid structure.

Facile Synthesis of a Porous ZnO Nanorod Array with Enhanced Photocatalysis for Photoelectrochemical Water Splitting Application

2020 ◽  
Vol 20 (6) ◽  
pp. 3512-3518
Author(s):  
Saleh Khan ◽  
Xiao-He Liu ◽  
Xi Jiang ◽  
Qing-Yun Chen
Keyword(s):  
Annealing Temperature ◽  
Zno Nanorods ◽  
Nanorod Array ◽  
Photocurrent Density ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Irradiation Intensity ◽  
Heat Treated ◽  
Positive Effect

Highly efficient and effective porous ZnO nanorod arrays were fabricated by annealing ZnO nanorod arrays grown on a substrate using a simple hydrothermal method. The annealing had a positive effect on the nanorod morphology, structure and optical properties. The porosity was closely related to the annealing temperature. After heating at 450 °C, pores appeared on the nanorods. It was demonstrated that the porosity could be exploited to improve the visible light absorption of ZnO and reduce the bandgap from 3.11 eV to 2.99 eV. A combination of improved charge separation and transport of the heat-treated ZnO thus led to an increase in the photoelectrochemical properties. At an irradiation intensity of 100 mW/cm−2, the photocurrent density of the porous nanorod array was approximately 1.3 mA cm−2 at 1.2 V versus Ag/AgCl, which was five times higher than that of the ZnO nanorods. These results revealed the synthesis of promising porous ZnO nanorods for photoelectrochemical applications.

ZnO nanorod arrays grown on an AlN buffer layer and their enhanced ultraviolet emission

CrystEngComm ◽  
2017 ◽  
Vol 19 (41) ◽  
pp. 6085-6088 ◽  
Author(s):  
Amany Ali ◽  
DongBo Wang ◽  
JinZhong Wang ◽  
ShuJie Jiao ◽  
FengYun Guo ◽  
...  
Keyword(s):  
Buffer Layer ◽  
Zno Nanorods ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
Ultraviolet Emission ◽  
Aln Buffer

The ultraviolet luminescence of ZnO nanorods was greatly enhanced through introducing an AlN buffer layer.

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.

scholarly journals Construction of 3D Arrays of Cylindrically Hierarchical Structures with ZnO Nanorods Hydrothermally Synthesized on Optical Fiber Cores

2014 ◽  
Vol 2014 ◽  
pp. 1-8
Author(s):  
Weixuan Jing ◽  
Han Qi ◽  
Jiafan Shi ◽  
Zhuangde Jiang ◽  
Fan Zhou ◽  
...  
Keyword(s):  
Optical Fiber ◽  
Zno Nanorods ◽  
Hierarchical Structures ◽  
Power Spectrum Density ◽  
Zno Nanorod ◽  
Characteristic Parameters ◽  
Front View ◽  
Spectrum Density ◽  
Surface Morphologies

With ZnO nanorods hydrothermally synthesized on manually assembled arrays of optical fiber cores, 3D arrays of ZnO nanorod-based cylindrically hierarchical structures with nominal pitch 250 μm or 375 μm were constructed. Based on micrographs of scanning electron microscopy and image processing operators of MATLAB software, the 3D arrays of cylindrically hierarchical structures were quantitatively characterized. The values of the actual diameters, the actual pitches, and the parallelism errors suggest that the process capability of the manual assembling is sufficient and the quality of the 3D arrays of cylindrically hierarchical structures is acceptable. The values of the characteristic parameters such as roughness, skewness, kurtosis, correlation length, and power spectrum density show that the surface morphologies of the cylindrically hierarchical structures not only were affected significantly by Zn2+concentration of the growth solution but also were anisotropic due to different curvature radii of the optical fiber core at side and front view.

scholarly journals Controlling the hydrothermal growth and the properties of ZnO nanorod arrays by pre-treating the seed layer

RSC Advances ◽  
2014 ◽  
Vol 4 (84) ◽  
pp. 44452-44456 ◽  
Author(s):  
Y. Yin ◽  
Y. Sun ◽  
M. Yu ◽  
X. Liu ◽  
B. Yang ◽  
...  
Keyword(s):  
Seed Layer ◽  
Zno Nanorods ◽  
Hydrothermal Growth ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays

Annealing or plasma pre-treating the ZnO seed layer influences the nucleation and hydrothermal growth of ZnO nanorods and their photoluminescence.

scholarly journals A simple all-solution approach to the synthesis of large ZnO nanorod networks

2015 ◽  
Vol 3 (8) ◽  
pp. 4568-4577 ◽  
Author(s):  
A. Resmini ◽  
I. G. Tredici ◽  
C. Cantalini ◽  
L. Giancaterini ◽  
F. De Angelis ◽  
...  
Keyword(s):  
Soft Lithography ◽  
Growth Process ◽  
Zno Nanorods ◽  
Hydrothermal Growth ◽  
Zno Nanorod ◽  
Process Yield ◽  
Solution Approach ◽  
Self Assembling

Soft-lithography of Zn-loaded hydrogels and a subsequent hydrothermal growth process yield self-assembling networks of bridging ZnO nanorods (NRs). They are grown on seeding micropillars of ZnO until they touch, forming junctions that provide a preferred electrical path for the operative current of functional devices (e.g. gas senors).

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