Structural, optical and photo-electrochemical properties of hydrothermally grown ZnO nanorods arrays covered with α-Fe2O3 nanoparticles

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75063-75072 ◽  
Author(s):  
Mohua Chakraborty ◽  
Dhrubojyoti Roy ◽  
Amrita Biswas ◽  
R. Thangavel ◽  
G. Udayabhanu
Keyword(s):  
Electrochemical Properties ◽  
Hydrothermal Method ◽  
Indium Oxide ◽  
Chemical Process ◽  
Low Cost ◽  
Zno Nanorods ◽  
Zno Nanorod ◽  
Fe2o3 Nanoparticles ◽  
Glass Substrates ◽  
Wet Chemical

A low cost hydrothermal method and subsequent wet-chemical process has been used for the preparation of a ZnO nanorod (NR) array film grown on tin doped indium oxide (ITO) coated glass substrates, post decorated by α-Fe2O3 nanoparticles (NPs).

scholarly journals Fabrication of Hybrid Catalyst ZnO Nanorod/α-Fe2O3 Composites for Hydrogen Evolution Reaction

Crystals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 356
Author(s):  
Kasimayan Uma ◽  
Elavarasan Muniranthinam ◽  
Siewhui Chong ◽  
Thomas C.-K Yang ◽  
Ja-Hon Lin
Keyword(s):  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Nickel Foam ◽  
Zno Nanorods ◽  
Synergetic Effect ◽  
Zno Nanorod ◽  
Fe2o3 Nanoparticles ◽  
X Ray

This report presents the synthesis of ZnO nanorod/α-Fe2O3 composites by the hydrothermal method with different weight percentages of α-Fe2O3 nanoparticles. The as-synthesized nanorod composites were characterized by different techniques, such as X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), field emission scanning electron microscopy (FE-SEM), electrochemical impedance spectroscopy (EIS), and X-ray photoelectron spectroscopy (XPS). From our results, it was found that the ZnO/α-Fe2O3 (3 wt%) nanorod composites exhibit a higher hydrogen evolution reaction (HER) activity when compared to other composites. The synergetic effect between ZnO and (3 wt%) of α-Fe2O3 nanocomposites resulted in a low onset potential of −125 mV, which can effectively produce more H2 than pure ZnO. The H2 production rate over the composite of ZnO/α-Fe2O3 (3 wt%) clearly shows a significant improvement in the photocatalytic activity in the heterojunction of the ZnO nanorods and α-Fe2O3 nanoparticles on nickel foam.

Effect of Heat Treatment on the Electrochemical Properties of Mn Oxide-Based Powder Prepared Using a Wet Chemical Process

2016 ◽  
Vol 8 (1) ◽  
pp. 89-95 ◽  
Author(s):  
Woo Won Chun ◽  
Myung Sik Shin ◽  
Bit Na Choi ◽  
Aniu Qian ◽  
Jong Wook Bae ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Electrochemical Properties ◽  
Chemical Process ◽  
Mn Oxide ◽  
Wet Chemical

scholarly journals MnS nanocomposites based on doped graphene: simple synthesis by a wet chemical route and improved electrochemical properties as an electrode material for supercapacitors

RSC Advances ◽  
2017 ◽  
Vol 7 (4) ◽  
pp. 2249-2257 ◽  
Author(s):  
Rajendran Ramachandran ◽  
Murugan Saranya ◽  
Andrews Nirmala Grace ◽  
Fei Wang
Keyword(s):  
Electrochemical Properties ◽  
Electrode Material ◽  
Chemical Process ◽  
Chemical Route ◽  
Nitrogen Doped ◽  
Boron Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
Wet Chemical ◽  
Wet Chemical Route

Nanocomposites of MnS anchored on graphene, nitrogen-doped graphene and boron-doped graphene have been prepared by a simple wet chemical process.

Phosphorus-Doped p-Type ZnO Nanorods and ZnO Nanorod p−n Homojunction LED Fabricated by Hydrothermal Method

2009 ◽  
Vol 113 (50) ◽  
pp. 21208-21212 ◽  
Author(s):  
Xuan Fang ◽  
Jinhua Li ◽  
Dongxu Zhao ◽  
Dezhen Shen ◽  
Binghui Li ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Zno Nanorods ◽  
Zno Nanorod ◽  
P Type ◽  
Phosphorus Doped

Fabrication of ZnO Nanorod for Room Temperature NO Gas Sensor

2014 ◽  
Vol 1043 ◽  
pp. 96-100 ◽  
Author(s):  
Sin Tee Tan ◽  
Muhammad Yahaya ◽  
Chun Hui Tan ◽  
Chi Chin Yap ◽  
Akrajas Ali Umar ◽  
...  
Keyword(s):  
Room Temperature ◽  
Low Cost ◽  
Zno Nanorods ◽  
High Sensitivity ◽  
Zno Nanorod ◽  
One Dimensional ◽  
Nanorods Array ◽  
Direct Energy ◽  
Hydrothermal Approach ◽  
No Sensor

One dimensional ZnO nanorod has been extensively studied in sensor application due to its unique properties in direct energy band gap and high binding energy. In this report, ZnO nanorod arrays were synthesized via hydrothermal approach. Highly oriented (002) nanorods array with diameter of (22.42 ± 1.40) nm was successfully grown on the quartz surface. A low cost and room temperature optical based NO sensor was introduced. ZnO nanorods array show a high sensitivity upon the NO gas which is 20.1 % within 3 minutes. This newly established method can be potentially used in detection of other toxicity gas.

OPTICAL CHARACTERIZATION OF ZnO NANOROD ARRAYS GROWN FROM SOLUTION

2010 ◽  
Vol 09 (05) ◽  
pp. 447-451 ◽  
Author(s):  
WALTER WATER ◽  
TE-HUA FANG ◽  
LIANG-WEN JI ◽  
CHING-CHIN LEE
Keyword(s):  
Zno Nanorods ◽  
Zinc Nitrate ◽  
Nitrate Hexahydrate ◽  
Zno Nanorod ◽  
Nanorod Arrays ◽  
Zno Nanorod Arrays ◽  
X Ray Diffraction ◽  
Glass Substrates ◽  
Current Voltage ◽  
Ito Glass

ZnO nanorods were synthesized on ZnO / ITO glass substrates using an aqueous solution of zinc nitrate hexahydrate and hexamethylenetetramine. The effects of hexamethylenetetramine concentration on the crystalline structure and surface morphology of ZnO nanorods were investigated. X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to analyze the crystalline characteristics and microstructures of the nanorod arrays. Ultraviolet/visible spectroscopy and photoluminescence (PL) spectra were used to characterize the optical properties of ZnO nanorods. Larger and brighter photoluminescent ZnO nanorods were obtained from solutions with higher hexamethylenetetramine concentrations. A nanogenerator based on ZnO nanorod arrays was fabricated in the investigation. The nanogenerator's current–voltage characteristics with Schottky-like behavior were discussed.

scholarly journals SERS Effect on Spin-Coated Seeding of Tilted Au-ZnO Nanorods for Low-Cost Diagnosis

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5321
Author(s):  
Miyeon Jue ◽  
Chan-Gi Pack ◽  
Seakhee Oh ◽  
Bjorn Paulson ◽  
Kwanhee Lee ◽  
...  
Keyword(s):  
Low Cost ◽  
Zno Nanorods ◽  
Cost Effective ◽  
Surface Enhanced Raman Spectroscopy ◽  
Angular Distributions ◽  
Zno Nanorod ◽  
X Ray Diffraction ◽  
Raman Enhancement ◽  
Surface Enhanced Raman ◽  
Increased Sensitivity

Uniformly parallel Au-coated ZnO nanorods have previously been shown to amplify local Raman signals, providing increased sensitivity to disease markers in the detection of inflammation and cancer. However, practical and cost-effective fabrication methods of substrates for surface-enhanced Raman spectroscopy (SERS) fail to produce highly uniform surfaces. Here, the feasibility of Raman enhancement on less-uniform substrates is assessed. ZnO nanorod structures were fabricated by hydrothermal synthesis, starting from spin-coated seed substrates. Following analysis, the nanostructures were coated with Au to create stochastically variant substrates. The non-uniformity of the fabricated Au-coated ZnO nanorod structures is confirmed morphologically by FE-SEM and structurally by X-ray diffraction, and characterized by the angular distributions of the nanorods. Monte Carlo finite element method simulations matching the measured angular distributions and separations predicted only moderate increases in the overall Raman enhancement with increasing uniformity. Highly variant substrates exhibited approximately 76% of the Raman enhancement of more uniform substrates in simulations and experiments. The findings suggest that, although highly inhomogeneous Au-coated ZnO nanorod substrates may not attain the same Raman enhancement as more uniform substrates, the relaxation of fabrication tolerances may be economically viable.

Synthesis and fast-response of a photodetector of hydrothermally grown ZnO nanorods through the use of a graphene oxide/ZnO seed layer

RSC Advances ◽  
2015 ◽  
Vol 5 (114) ◽  
pp. 94222-94226 ◽  
Author(s):  
Giwoong Nam ◽  
Jae-Young Leem
Keyword(s):  
Graphene Oxide ◽  
Hydrothermal Method ◽  
Seed Layer ◽  
Zno Nanorods ◽  
Fast Response ◽  
Zno Nanorod ◽  
Uv Detector

We used a hydrothermal method combined with a graphene oxide (GO)/ZnO seed layer to fabricate a ZnO nanorod based fast-response UV detector.

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