High-performance n-Si/α-Fe2O3 core/shell nanowire array photoanode towards photoelectrochemical water splitting

Nanoscale ◽  
2014 ◽  
Vol 6 (6) ◽  
pp. 3182-3189 ◽  
Author(s):  
Xiaopeng Qi ◽  
Guangwei She ◽  
Xing Huang ◽  
Taiping Zhang ◽  
Huimin Wang ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Water Splitting ◽  
High Performance ◽  
Nanowire Array ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Excellent Performance ◽  
Transfer Processes ◽  
Band Position

We report n-Si/α-Fe2O3 core/shell nanowire array photoanodes exhibiting excellent performance for photoelectrochemical water splitting. The material size-related charge transfer processes and band position changes in the composite photoelectrodes were investigated.

Enhanced Performance of Photoelectrochemical Water Splitting with ITO@α-Fe2O3 Core–Shell Nanowire Array as Photoanode

2015 ◽  
Vol 7 (48) ◽  
pp. 26482-26490 ◽  
Author(s):  
Jie Yang ◽  
Chunxiong Bao ◽  
Tao Yu ◽  
Yingfei Hu ◽  
Wenjun Luo ◽  
...  
Keyword(s):  
Water Splitting ◽  
Nanowire Array ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell

Omnidirectional Au-embedded ZnO/CdS core/shell nanorods for enhanced photoelectrochemical water-splitting efficiency

2020 ◽  
Vol 56 (28) ◽  
pp. 3975-3978 ◽  
Author(s):  
H. N. Hieu ◽  
N. V. Nghia ◽  
N. M. Vuong ◽  
H. Van Bui
Keyword(s):  
Charge Transfer ◽  
Water Splitting ◽  
Transfer Mechanism ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Photoconversion Efficiency ◽  
Charge Transfer Mechanism

The charge transfer mechanism that enhanced the photoconversion efficiency of omnidirectional Au-embedded ZnO/CdS core/shell nanorods.

A porous ZnGaNO photoanode for efficient water oxidation modified by a Co-based electrocatalyst

2015 ◽  
Vol 44 (8) ◽  
pp. 3856-3861 ◽  
Author(s):  
S. C. Yan ◽  
Z. G. Zou
Keyword(s):  
Charge Transfer ◽  
Single Crystal ◽  
Water Splitting ◽  
Water Oxidation ◽  
High Performance ◽  
Specific Area ◽  
Photoelectrochemical Water Splitting ◽  
Transfer Distance ◽  
High Specific Area

Porous ZnGaNO microrods were synthesized by a single crystal internal decomposition route, and exhibited high performance in photoelectrochemical water splitting due to the high specific area and short charge transfer distance of the microstructure.

One-Dimensional TiO2@GaON Core-Shell Nanowires with Controlled Shell Thickness from Atomic Layer Deposition for Stable and Efficient Photoelectrochemical Water Splitting

2019 ◽  
Author(s):  
Jiajia Tao ◽  
Hong-Ping Ma ◽  
Kaiping Yuan ◽  
Yang Gu ◽  
Jianwei Lian ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Band Gap ◽  
Water Splitting ◽  
Atomic Layer ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Photoelectrochemical Performance ◽  
Highly Efficient ◽  
Layer Deposition ◽  
Shell Nanowires

<div>As a promising oxygen evolution reaction semiconductor, TiO2 has been extensively investigated for solar photoelectrochemical water splitting. Here, a highly efficient and stable strategy for rationally preparing GaON cocatalysts on TiO2 by atomic layer deposition is demonstrated, which we show significantly enhances the</div><div>photoelectrochemical performance compared to TiO2-based photoanodes. For TiO2@20 nm-GaON core-shell nanowires a photocurrent density up to 1.10 mA cm-2 (1.23 V vs RHE) under AM 1.5 G irradiation (100 mW cm-2) has been achieved, which is 14 times higher than that of TiO2 NWs. Furthermore, the oxygen vacancy formation on GaON as well as the band gap matching with TiO2 not only provides more active sites for water oxidation but also enhances light absorption to promote interfacial charge separation and migration. Density functional theory studies of model systems of GaON-modified TiO2 confirm the band gap reduction, high reducibility and ability to activate water. The highly efficient and stable systems of TiO2@GaON core-shell nanowires provide a deeper understanding and universal strategy for enhancing photoelectrochemical performance of photoanodes now available. </div>

scholarly journals A SERS Study of Charge Transfer Process in Au Nanorod–MBA@Cu2O Assemblies: Effect of Length to Diameter Ratio of Au Nanorods

Nanomaterials ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 867
Author(s):  
Lin Guo ◽  
Zhu Mao ◽  
Sila Jin ◽  
Lin Zhu ◽  
Junqi Zhao ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Shell Structure ◽  
Shell Structures ◽  
Core Shell ◽  
Absorption Bands ◽  
Au Nanorods ◽  
The Core ◽  
Band Position ◽  
Surface Enhanced Raman ◽  
Core Shell Structure

Surface-enhanced Raman scattering (SERS) is a powerful tool in charge transfer (CT) process research. By analyzing the relative intensity of the characteristic bands in the bridging molecules, one can obtain detailed information about the CT between two materials. Herein, we synthesized a series of Au nanorods (NRs) with different length-to-diameter ratios (L/Ds) and used these Au NRs to prepare a series of core–shell structures with the same Cu2O thicknesses to form Au NR–4-mercaptobenzoic acid (MBA)@Cu2O core–shell structures. Surface plasmon resonance (SPR) absorption bands were adjusted by tuning the L/Ds of Au NR cores in these assemblies. SERS spectra of the core-shell structure were obtained under 633 and 785 nm laser excitations, and on the basis of the differences in the relative band strengths of these SERS spectra detected with the as-synthesized assemblies, we calculated the CT degree of the core–shell structure. We explored whether the Cu2O conduction band and valence band position and the SPR absorption band position together affect the CT process in the core–shell structure. In this work, we found that the specific surface area of the Au NRs could influence the CT process in Au NR–MBA@Cu2O core–shell structures, which has rarely been discussed before.

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