In situ textured carbon nitride photoanodes with enhanced photoelectrochemical activity by band-gap state modulation

2020 ◽  
Vol 8 (45) ◽  
pp. 24005-24012
Author(s):  
Miaoyan Huang ◽  
Haipeng Wang ◽  
Wan Li ◽  
Yan-Ling Zhao ◽  
Rui-Qin Zhang
Keyword(s):  
Charge Carrier ◽  
Band Gap ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Photoelectrochemical Water Splitting ◽  
Photoelectrochemical Activity ◽  
Carrier Separation ◽  
Gap State

As promising photoelectrodes in photoelectrochemical water splitting cells, the photoelectrochemical activity of oxygen-doped CN films can be enhanced by a band-gap state modulation strategy to effectively improve the charge carrier separation.

Titania Coated Hematite Nanostructures for Solar Water Splitting Applications

Nano LIFE ◽  
2016 ◽  
Vol 06 (02) ◽  
pp. 1650008 ◽  
Author(s):  
Timur Sh. Atabaev ◽  
Sanjar Atabaev
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Light Harvesting ◽  
Photoelectrochemical Water Splitting ◽  
Photoelectrochemical Activity ◽  
Solar Water ◽  
Analysis Techniques ◽  
Solar Water Splitting ◽  
Titania Layer ◽  
Carrier Separation

In this study, we report the successful preparation of hematite nanostructures coated with thin titania layer for potential solar water splitting applications. The prepared samples were studied systematically by a range of analysis techniques. We showed that resulting hybrid hematite-titania nanosystem exhibited improved photoelectrochemical activity for solar water splitting compared to the bare hematite only. We also showed that this enhancement was achieved through an improvement in light harvesting and better charge carrier separation. Thus, these findings may open new perspectives for the development of photoelectrodes used in photoelectrochemical water splitting applications.

Nanoporous BiVO4 nanoflake array photoanode for efficient photoelectrochemical water splitting

CrystEngComm ◽  
2020 ◽  
Vol 22 (11) ◽  
pp. 1914-1921 ◽  
Author(s):  
Jingjing Wang ◽  
Canjun Liu ◽  
Yang Liu ◽  
Shu Chen
Keyword(s):  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
High Quality ◽  
Photoelectrochemical Activity ◽  
Transformation Approach

A high-quality nanoporous BiVO4 nanoflake array photoanode was prepared by using an in situ transformation approach, which exhibited an excellent photoelectrochemical activity.

scholarly journals Compact carbon nitride based copolymer films with controllable thickness for photoelectrochemical water splitting

2017 ◽  
Vol 5 (36) ◽  
pp. 19062-19071 ◽  
Author(s):  
Quan Gu ◽  
Xuezhong Gong ◽  
Qiaohui Jia ◽  
Jianni Liu ◽  
Ziwei Gao ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Carbon Nitride ◽  
Light Harvesting ◽  
Photoelectrochemical Water Splitting ◽  
Photoelectrochemical Performance ◽  
Copolymer Films

Carbon nitride based copolymer films consisting of tri-s-triazines and s-triazines are in situ grown on various substrates and exhibit excellent photoelectrochemical performance, which is attributed to strong visible light harvesting transport.

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>

Time-Resolved Observations of Photo-Generated Charge-Carrier Dynamics in Sb2Se3 Photocathodes for Photoelectrochemical Water Splitting

ACS Nano ◽  
2018 ◽  
Vol 12 (11) ◽  
pp. 11088-11097 ◽  
Author(s):  
Wooseok Yang ◽  
Seungmin Lee ◽  
Hyeok-Chan Kwon ◽  
Jeiwan Tan ◽  
Hyungsoo Lee ◽  
...  
Keyword(s):  
Charge Carrier ◽  
Water Splitting ◽  
Carrier Dynamics ◽  
Photoelectrochemical Water Splitting ◽  
Time Resolved ◽  
Charge Carrier Dynamics
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