Annealing effect of fluorine-doped SnO2/WO3 core-shell inverse opal nanoarchitecture for photoelectrochemical water splitting

2017 ◽  
Vol 70 (2) ◽  
pp. 162-168 ◽  
Author(s):  
Seo Yoon Cho ◽  
Soon Hyung Kang ◽  
Gun Yun ◽  
Maheswari Balamurugan ◽  
Kwang-Soon Ahn
Keyword(s):  
Water Splitting ◽  
Annealing Effect ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Inverse Opal

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>

Ultrathin SnS2 Nanosheet Decorated B-TiO2 / TiO2 Core Shell Nanorods for Photoelectrochemical Water Splitting

2021 ◽  
Vol MA2021-02 (49) ◽  
pp. 1432-1432
Author(s):  
Soumyajit Maitra ◽  
Somoprova Halder ◽  
Toulik Maitra ◽  
Subhasis Roy
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell

Cadmium Sulphide Sensitized Crystal Facet Tailored Nanostructured Nickel Ferrite @ Hematite Core-Shell Ternary Heterojunction Photoanode for Photoelectrochemical Water Splitting

MRS Advances ◽  
2020 ◽  
Vol 5 (50) ◽  
pp. 2585-2593
Author(s):  
Soumyajit Maitra ◽  
Arundhati Sarkar ◽  
Toulik Maitra ◽  
Somoprova Halder ◽  
Subhasis Roy ◽  
...  
Keyword(s):  
Water Splitting ◽  
Cadmium Sulphide ◽  
Band Alignment ◽  
Photoelectrochemical Water Splitting ◽  
Cds Nanoparticles ◽  
Core Shell ◽  
Xenon Lamp ◽  
Photoelectrochemical Performance ◽  
Crystal Facet ◽  
Hydrothermal Approach

AbstractDesign of composite semiconductor nanostructures with proper band alignment for efficient charge separation and carrier transport has been at the center of research for photoelectrochemical water splitting. This work demonstrates the deposition of a NiFe2O4 @Fe2O3 core-shell nanostructured film sensitized with CdS to form a ternary heterojunction for cascade type electron transfer. The hematite nanostructures were grown by hydrothermal approach through dipping into a solution of Nickel Nitrate yielded anchoring of Ni2+ ions on the outer surface. The films were then annealed at 650 0C for the diffusion of Ni2+ ions into the hematite lattice which forms core-shell NiFe2O4 @Fe2O3 heterojunction. The films were further sensitized with CdS nanoparticles deposited by a hydrothermal approach to form the final ternary heterojunction photoanode. Several different nanostructures were grown and the effect of crystal facet tailoring was observed on Ni loading and photoelectrochemical performance. The photoelectrochemical measurements were carried out using a potentiostat under 100 mW/cm2 light source (150W Xenon Lamp) with Pt counter electrode and 0.5 M Na2S and 0.5 M Na2SO3 electrolyte. A current density of 3.47 mA/cm2 was observed at 1.23 V (vs Ag/AgCl). An Applied Bias to Photocurrent Efficiency (ABPE) of 1.8 % photoconversion efficiency was observed using the fabricated electrodes at 0.288V (vs Ag/AgCl).

Electronic doping-enabled transition from n- to p-type conductivity over Au@CdS core–shell nanocrystals toward unassisted photoelectrochemical water splitting

2019 ◽  
Vol 7 (40) ◽  
pp. 23038-23045 ◽  
Author(s):  
Rongrong Pan ◽  
Jia Liu ◽  
Yuemei Li ◽  
Xinyuan Li ◽  
Erhuan Zhang ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Cation Exchange ◽  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Core Shell ◽  
Type Conductivity ◽  
Hybrid Nanocrystals ◽  
Novel Strategy ◽  
Electronic Doping ◽  
P Type

Here we show a novel strategy for tailoring the synergistic electrical properties of metal@semiconductor hybrid nanocrystals (HNCs) based on cation exchange-enabled electronic doping.

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