scholarly journals Fabrication of Fe2O3 nanowire arrays based on oxidation-assisted stress-induced atomic-diffusion and their photovoltaic properties for solar water splitting

RSC Advances ◽  
2017 ◽  
Vol 7 (49) ◽  
pp. 30548-30553 ◽  
Author(s):  
Yiyuan Xie ◽  
Yang Ju ◽  
Yuhki Toku ◽  
Yasuyuki Morita
Keyword(s):  
Water Splitting ◽  
High Density ◽  
Nanowire Arrays ◽  
Atomic Diffusion ◽  
Photovoltaic Properties ◽  
Simple Method ◽  
Solar Water ◽  
Solar Water Splitting

In this research, we propose a new simple method to fabricate high-density Fe2O3 nanowire arrays for solar water splitting, based on oxidation-assisted stress-induced atomic-diffusion.

3D-Branched ZnO/CdS Nanowire Arrays for Solar Water Splitting and the Service Safety Research

2015 ◽  
Vol 6 (3) ◽  
pp. 1501459 ◽  
Author(s):  
Zhiming Bai ◽  
Xiaoqin Yan ◽  
Yong Li ◽  
Zhuo Kang ◽  
Shiyao Cao ◽  
...  
Keyword(s):  
Water Splitting ◽  
Nanowire Arrays ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Cds Nanowire ◽  
Safety Research

ZnO nanowire arrays decorated with PtO nanowires for efficient solar water splitting

2018 ◽  
Vol 8 (11) ◽  
pp. 2789-2793 ◽  
Author(s):  
Shurong Fu ◽  
Beibei Zhang ◽  
Hongyan Hu ◽  
Yajun Zhang ◽  
Yingpu Bi
Keyword(s):  
Water Splitting ◽  
Nanowire Arrays ◽  
Zno Nanowire ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Highly Efficient ◽  
Zno Nanowire Arrays ◽  
First Time

Vertically-oriented PtO nanowires have been selectively grown on ZnO nanowire arrays for the first time by a light-controlled method and were utilized as highly efficient OER cocatalysts for remarkably enhancing the PEC performance of water splitting.

scholarly journals Electrochemical Fabrication of Cu2O-Nanowires-based Photo-cathodes for Enhanced Solar Water Splitting

2018 ◽  
Author(s):  
Iqra Reyaz Hamdani ◽  
Ashok N. Bhaskarwar
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Light Harvesting ◽  
Radial Distance ◽  
Nanowire Arrays ◽  
Carrier Diffusion ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Charge Carrier Diffusion ◽  
Cu Foil

Solar-power driven photoelectrochemical (PEC) water splitting using semiconductor photoelectrodes is one of the most promising approaches for energy conversion, in terms of production of renewable hydrogen with a minimum carbon footprint. There are, however, enormous challenges to be overcome to obtain sufficient solar water-splitting efficiency, such as over-potential losses due to fast recombination rates of charge carriers, electrode photo-degradation, limited light-harvesting capacities, to name a few. In this work, we report an extensive study on Cu2O based photocathode for hydrogen evolution reaction (HER) in terms of enhancing its solar-to-hydrogen (STH) conversion efficiency, while using low-cost fabrication methods. We have addressed the inefficiency of Cu2O which mainly arises due to incompatible light absorption and charge carrier diffusion lengths, by fabricating highly reproducible Cu2O-nanowire arrays on Cu substrate. The reported optimal thickness of Cu2O for efficient absorption of sunlight is around 2-4 µm, while the minority charge carrier diffusion length is limited to 200-250 nm only. The nanostructured Cu2O, especially in the form of nanowire arrays, improves its performance through morphology control, by improving the light-harvesting capacity along the full length of wire and providing a shorter diffusion path length corresponding to the radial distance in the wire, towards the electrolyte. We prepared the photocathode by anodizing Cu foil to Cu(OH)2 nanowires at 10 mA/cm2, followed by oxidation to Cu2O nanowires in an inert atmosphere. Experimental measurements showed that the process was highly reproducible and resulted in an increased current density from -0.5 mA/cm2 for planar Cu2O to -82.3 mA/cm2 for Cu2O nanowires, both at 0.9 V cathodic bias. The photocurrent density was enhanced from -0.15 mA/cm2 for planar Cu2O to -5.54 mA/cm2 for the nanowire morphology, while using visible light source in all cases. All the photoelectrodes were reproducible in the regime of 4 µm thicknesses of Cu2O nanowires, oxidized over Cu-foil substrates. The STH efficiency calculated for all the fabricated photoelectrodes was as high as 3.54% ± 0.21%, in comparison to 0.24% for the planar Cu2O photoelectrodes.

3D InGaN nanowire arrays on oblique pyramid-textured Si (311) for light trapping and solar water splitting enhancement

Nano Energy ◽  
2021 ◽  
Vol 83 ◽  
pp. 105768
Author(s):  
Hedong Chen ◽  
Peng Wang ◽  
Xingyu Wang ◽  
Xingfu Wang ◽  
Lujia Rao ◽  
...  
Keyword(s):  
Water Splitting ◽  
Light Trapping ◽  
Nanowire Arrays ◽  
Solar Water ◽  
Solar Water Splitting

scholarly journals Synthesis of a single-crystal Fe 2 O 3 nanowire array based on stress-induced atomic diffusion used for solar water splitting

2018 ◽  
Vol 5 (3) ◽  
pp. 172126 ◽  
Author(s):  
Yiyuan Xie ◽  
Yang Ju ◽  
Yuhki Toku ◽  
Yasuyuki Morita
Keyword(s):  
Single Crystal ◽  
Water Splitting ◽  
Nanowire Array ◽  
Sample Surface ◽  
Photocurrent Density ◽  
Electrode System ◽  
Atomic Diffusion ◽  
Hydrogen Electrode ◽  
Solar Water ◽  
Solar Water Splitting

In this study, we successfully fabricated a single-crystal Fe 2 O 3 nanowire array based on stress-induced atomic diffusion and used this array as the photoelectrode for solar water splitting. With the surface polishing treatment on the sample surface, the density of the Fe 2 O 3 nanowire array reached up to 28.75 wire µm −2 when heated for 90 min at 600°C. The photocurrent density of the optimized sample was 0.9 mA cm −2 at 1.23 V versus a reversible hydrogen electrode in a three-electrode system under AM 1.5 G illumination. The incident photon-to-electron conversion efficiency was 6.8% at 400 nm.

In situ formation of zinc ferrite modified Al-doped ZnO nanowire arrays for solar water splitting

2016 ◽  
Vol 4 (14) ◽  
pp. 5124-5129 ◽  
Author(s):  
Yang-Fan Xu ◽  
Hua-Shang Rao ◽  
Xu-Dong Wang ◽  
Hong-Yan Chen ◽  
Dai-Bin Kuang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Zinc Ferrite ◽  
Nanowire Arrays ◽  
Zno Nanowire ◽  
Solar Water ◽  
Solar Water Splitting ◽  
Wet Chemical ◽  
Doped Zno ◽  
In Situ Formation

A simple wet-chemical treating method is introduced to in situ fabricate ZnFe2O4 onto conductive Al:ZnO nanowire arrays for solar-driven water splitting.

Sign in / Sign up

Export Citation Format

Share Document