scholarly journals Influence of Au Plasmons and Their Synergistic Effects With ZnO Nanorods for Photoelectrochemical Water Splitting Applications

2021 ◽  
Author(s):  
Sayed Abdul Saboor ◽  
Vidhika Sharma ◽  
Ebrima L. Darboe ◽  
Vidya Doiphode ◽  
Ashvini Punde ◽  
...  
Keyword(s):  
Water Splitting ◽  
Electrochemical Impedance ◽  
Synergistic Effects ◽  
Zno Nanorods ◽  
Visible Region ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Current Voltage ◽  
Prospective Application ◽  
Pec Water Splitting

Abstract In this paper, Au plasmons and their synergistic effects with ZnO nanorods (ZNs) have been investigated for photoelectrochemical (PEC) water splitting application. Au plasmons and ZNs are deposited electrochemically. Au modified nanostructures have absorption in the visible region as plasmons enhance charge transfer and inhibit charge recombination. ZNs modified with Au (deposition duration ∼ 60 s) has a photo-current density of ∼ 660 µA cm-2, at a bias of 1.0V/SCE. X-ray diffraction and scanning electron microscopy were used to study the structure and surface morphology of fabricated photoanodes. UV-Visible absorption and Photoluminescence spectroscopy were used for optical characterization. We have recorded current-voltage measurements and photo-conversion efficiency measurements to substantiate our observations of the synthesized photoanodes for prospective application in PEC splitting of water. We have also carried out Mott-Schottky, and electrochemical impedance spectroscopy analysis. The analysis reveals that Au modified ZNs based photoanodes are a better proposition than their bare counterparts for PEC water splitting application.

scholarly journals The Enhancement of Visible Absorption of Cu Doped ZnO Nanorods on Patterned Substrates

2021 ◽  
Vol 37 (1) ◽  
Author(s):  
My Hoa Tong ◽  
Thi Hoa Lai ◽  
Nhat Minh Nguyen ◽  
Thi Kieu Hanh Ta ◽  
Thanh Tuan Anh Pham ◽  
...  
Keyword(s):  
Light Absorption ◽  
Zno Nanorods ◽  
Visible Region ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
Polydimethyl Siloxane ◽  
Visible Absorption ◽  
X Ray ◽  
Patterned Surface ◽  
Doped Zno

: We report the antireflection and light absorption in visible region by new stretchable substrates with patterned structure. Mogul substrates with 3-Dimentional structures were fabricated by using polydimethyl – siloxane that imitate the nanostructures surface. Then, Copper doped ZnO NRs on mogul-patterned surface by hydrothermal method at low temperature. The optical properties, morphology and structures of ZnO:Cu NRs were investigated through out of measurement the scanning electron microscopy, X-Ray diffraction and ultraviolet-visible spectroscopy, respectively. The results show the Cu doped ZnO NRs were uniformly and dense grown on mogul substrates, well oriented in the (002) plane. Additionally, the light absorption can be significantly enhanced to more 10% in a wide spectral range (400-800 nm) due to the reduce reflection. Growing ZnO NRs doping on new stretchable substrates with a mogul-patterned surface were successfully fabricated and applicable in the flexible and stretchable optoelectronic devices.  

scholarly journals Preparation of Fe-DopedTiO2Nanotubes and Their Photocatalytic Activities under Visible Light

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Honghui Teng ◽  
Shukun Xu ◽  
Dandan Sun ◽  
Ying Zhang
Keyword(s):  
Visible Light ◽  
Visible Region ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Photocatalytic Activities ◽  
Ultrasonic Assisted ◽  
Uv Visible

Fe-doped TiO2nanotubes (Fe-TNTs) have been prepared by ultrasonic-assisted hydrothermal method. The structure and composition of the as-prepared TiO2nanotubes were characterized by transmission electron microscopy, X-ray diffraction, and UV-Visible absorption spectroscopy. Their photocatalytic activities were evaluated by the degradation of MO under visible light. The UV-visible absorption spectra of the Fe-TNT showed a red shift and an enhancement of the absorption in the visible region compared to the pure TNT. The Fe-TNTs were provided with good photocatalytic activities and photostability and under visible light irradiation, and the optimum molar ratio of Ti : Fe was found to be 100 : 1 in our experiments.

Optimizing Performance of ZnO Nanorod and Activated Carbon as a Composite Anode for Lithium-Ion Batteries

2020 ◽  
Vol 1000 ◽  
pp. 31-40
Author(s):  
Bambang Priyono ◽  
Ananta Riezky Bachtiar ◽  
Hugo Abraham ◽  
Mohammad Ridho Nugraha ◽  
Faizah ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Electrochemical Impedance ◽  
Zno Nanorods ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Porosity ◽  
Composite Anode ◽  
X Ray Diffraction ◽  
Stable Performance

To obtain the high specific capacity anode for Lithium-ion battery with stable performance is conducted by synthesizing a composite anode of ZnO-nanorods (ZnO-NR) and as a matrix is the activated carbon (AC). In this study, ZnO-NR synthesized a process that uses basic materials hexamethylenetetramine (HMTA) and zinc oxide. Activated carbon has been activated because it has high porosity and good electrical conductivity properties. Variable used is the percentage of ZnO-NR, which is 30wt%, 40wt%, and 50wt%. Characterization of the samples was examined using X-Ray Diffraction (XRD), Scanning Electron Microscope (SEM), and Brunauer–Emmett–Teller (BET). The battery performance of the samples was obtained by Electrochemical Impedance Spectroscopy (EIS), Cyclic Voltammetry (CV), and Charge-Discharge (CD) testing after being assembled into coin cell batteries. This study discusses the effect of adding activated carbon to ZnO NR composites. The results showed that the ZnO-NR30/AC has the highest specific capacity of 270.9 mAh g-1. According to Brunner-Emmet-Teller (BET) test, the largest surface area was 631.685 m2 g-1. Electrochemical performance is the best obtained by ZnO-NR30/AC.

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 Borocarbonitride Layers on Titanium Dioxide Nanoribbons for Efficient Photoelectrocatalytic Water Splitting

Materials ◽  
2021 ◽  
Vol 14 (19) ◽  
pp. 5490
Author(s):  
Nuria Jiménez-Arévalo ◽  
Eduardo Flores ◽  
Alessio Giampietri ◽  
Marco Sbroscia ◽  
Maria Grazia Betti ◽  
...  
Keyword(s):  
Water Splitting ◽  
Photoelectron Spectroscopy ◽  
Vapour Deposition ◽  
Electrochemical Impedance ◽  
Chemical Vapour ◽  
Photoelectrochemical Cell ◽  
Flat Band ◽  
X Ray Diffraction ◽  
X Ray ◽  
Reflectance Measurements

Heterostructures formed by ultrathin borocarbonitride (BCN) layers grown on TiO2 nanoribbons were investigated as photoanodes for photoelectrochemical water splitting. TiO2 nanoribbons were obtained by thermal oxidation of TiS3 samples. Then, BCN layers were successfully grown by plasma enhanced chemical vapour deposition. The structure and the chemical composition of the starting TiS3, the TiO2 nanoribbons and the TiO2-BCN heterostructures were investigated by Raman spectroscopy, X-ray diffraction and X-ray photoelectron spectroscopy. Diffuse reflectance measurements showed a change in the gap from 0.94 eV (TiS3) to 3.3 eV (TiO2) after the thermal annealing of the starting material. Morphological characterizations, such as scanning electron microscopy and optical microscopy, show that the morphology of the samples was not affected by the change in the structure and composition. The obtained TiO2-BCN heterostructures were measured in a photoelectrochemical cell, showing an enhanced density of current under dark conditions and higher photocurrents when compared with TiO2. Finally, using electrochemical impedance spectroscopy, the flat band potential was determined to be equal in both TiO2 and TiO2-BCN samples, whereas the product of the dielectric constant and the density of donors was higher for TiO2-BCN.

Growth of Multidimensional Zinc Oxide Nanorods Array for Enhanced UV Photoresponsivity

2021 ◽  
Author(s):  
Ashish Yengantiwar ◽  
Arun G Banpurkar
Keyword(s):  
Zno Nanorods ◽  
Nanorod Array ◽  
Zinc Oxide Nanorods ◽  
X Ray Diffraction ◽  
Solution Deposition ◽  
Copper Electrodes ◽  
Nanorods Array ◽  
Current Voltage ◽  
Oxide Nanorods ◽  
Diffraction Patterns

Abstract Ultraviolet (UV) photosensitive device was fabricated using ZnO nanorod array on substrate with copper electrodes. Facile open aqueous solution deposition technique was used to grow the ZnO nanorods forming an electrical bridge between copper electrodes. Powder X-ray diffraction patterns was used to confirm the polycrystalline wurtzite ZnO phase and scanning electron microscopy (SEM) techniques was employed to characterize the growth morphology of ZnO nanorods. A current-voltage (I-V) characterization in the dark exhibits the back-to-back diode characteristics. In the presence of ultraviolet (UV) radiation, enhanced photo-response was reported wherein photocurrent increases by two orders of magnitude at 2 V bias. This enhancement is mainly due to lateral interfacial contacts between neighboring grain-boundary of the nanorods arrays.

1D ZnO/BiVO4 heterojunction photoanodes for efficient photoelectrochemical water splitting

2016 ◽  
Vol 45 (28) ◽  
pp. 11346-11352 ◽  
Author(s):  
Lu Yan ◽  
Wei Zhao ◽  
Zhifeng Liu
Keyword(s):  
Water Splitting ◽  
Zno Nanorods ◽  
Photoelectrochemical Water Splitting ◽  
Pec Water Splitting

In this paper, a novel ZnO nanorods (NRs)/BiVO4 heterojunction has been successfully prepared as a photoanode for photoelectrochemical (PEC) water splitting.

scholarly journals Effect of Different Seed Solutions on the Morphology and Electrooptical Properties of ZnO Nanorods

2012 ◽  
Vol 2012 ◽  
pp. 1-6 ◽  
Author(s):  
M. Kashif ◽  
U. Hashim ◽  
M. E. Ali ◽  
Syed M. Usman Ali ◽  
M. Rusop ◽  
...  
Keyword(s):  
Seed Layer ◽  
Zinc Acetate Dihydrate ◽  
Zno Nanorods ◽  
Forward Bias ◽  
Silicon Substrates ◽  
X Ray Diffraction ◽  
Acetate Dihydrate ◽  
Common Precursor ◽  
Current Voltage ◽  
Electrooptical Properties

The morphology and electrooptical properties of ZnO nanorods synthesized on monoethanolamine-based seed layer and KOH-based seed layer were compared. The seed solutions were prepared in monoethanolamine in 2-methoxyethanol and potassium hydroxide in methanol, respectively. Zinc acetate dihydrate was as a common precursor in both solutions. The nanorod-ZnOs were synthesized via the spin coating of two different seed solutions on silicon substrates followed by their hydrothermal growth. The scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence (PL), and Raman studies revealed that the ZnO nanorods obtained from monoethanolamine-based seed layer had fewer defects, better crystals, and better alignment than those realized via KOH-based seed layer. However, the current-voltage (I-V) characteristics demonstrated better conductivity of the ZnO nanorods obtained via KOH-based seed layer. The current measured in forward bias was 4 mA and 40 μA for ZnO-nanorods grown on KOH-based seed layer and monoethanolamine-based with the turn on voltage of approximately 1.5 V and 2.5 V, respectively, showing the feasibility of using both structures in optoelectric devices.

Synthesis and Luminescence Properties of Ce4+-Doped ZnO

2010 ◽  
Vol 148-149 ◽  
pp. 832-836
Author(s):  
Ke Zou ◽  
You Shi Wu ◽  
Jin Bo Zhao ◽  
Li Li Wu
Keyword(s):  
Concentration Level ◽  
Solvothermal Method ◽  
Zno Nanorods ◽  
Transmission Electron Micrograph ◽  
X Ray Diffraction ◽  
Structural And Optical Properties ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Uv Visible

ZnO nanorods doped with Ce4+ ions have been synthesized by a solvothermal method. The concentration level of Ce4+ additive was varied systematically from 1 to 10 mol. %. The structural and optical properties of Ce4+ -doped nanostructures are investigated using X-ray diffraction, transmission electron micrograph, UV-visible absorption and photoluminescence Spectroscopy. The results showed that the concentration increase of Ce4+ doping induce the enhancement of photoluminescence.

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