Band-gap determination from diffuse reflectance measurements of semiconductor films, and application to photoelectrochemical water-splitting

2007 ◽  
Vol 91 (14) ◽  
pp. 1326-1337 ◽  
Author(s):  
A MURPHY
Keyword(s):  
Band Gap ◽  
Water Splitting ◽  
Diffuse Reflectance ◽  
Photoelectrochemical Water Splitting ◽  
Semiconductor Films ◽  
Reflectance Measurements

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 Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements

2021 ◽  
pp. 114573
Author(s):  
Salmon Landi ◽  
Iran Rocha Segundo ◽  
Elisabete Freitas ◽  
Mikhail Vasilevskiy ◽  
Joaquim Carneiro ◽  
...  
Keyword(s):  
Band Gap ◽  
Diffuse Reflectance ◽  
Band Gap Energy ◽  
Gap Energy ◽  
Munk Function ◽  
Reflectance Measurements

Band gap tuning to improve the photoanodic activity of ZnInxSy for photoelectrochemical water oxidation

2019 ◽  
Vol 9 (23) ◽  
pp. 6769-6781 ◽  
Author(s):  
Mamta Devi Sharma ◽  
Chavi Mahala ◽  
Mrinmoyee Basu
Keyword(s):  
Band Gap ◽  
Water Splitting ◽  
Water Oxidation ◽  
Photoelectrochemical Water Splitting ◽  
Elemental Doping ◽  
Band Gap Tuning ◽  
Photoelectrochemical Water Oxidation

Elemental doping and band gap tuning of ZnInxSy result in enhanced photoelectrochemical water splitting activity.

Enhanced Photoelectrochemical Water Splitting Behaviour of Tuned Band Gap CdSe QDs Sensitized LaB6

2017 ◽  
Vol 17 (1) ◽  
pp. 437-442 ◽  
Author(s):  
M. Soban Babu ◽  
A Sivanantham ◽  
B. Barath Chakravarthi ◽  
R. Sujith kannan ◽  
Subhendu K Panda ◽  
...  
Keyword(s):  
Band Gap ◽  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Cdse Qds

scholarly journals Tungsten doping of Ta3N5-nanotubes for band gap narrowing and enhanced photoelectrochemical water splitting efficiency

2015 ◽  
Vol 51 ◽  
pp. 85-88 ◽  
Author(s):  
Sabina Grigorescu ◽  
Benedikt Bärhausen ◽  
Lei Wang ◽  
Anca Mazare ◽  
Jeong Eun Yoo ◽  
...  
Keyword(s):  
Band Gap ◽  
Water Splitting ◽  
Photoelectrochemical Water Splitting ◽  
Band Gap Narrowing ◽  
Tungsten Doping

A multitude of modifications strategy of ZnFe2O4 nanorod photoanodes for enhanced photoelectrochemical water splitting activity

2018 ◽  
Vol 6 (26) ◽  
pp. 12693-12700 ◽  
Author(s):  
Ju Hun Kim ◽  
Youn Jeong Jang ◽  
Sun Hee Choi ◽  
Byeong Jun Lee ◽  
Jeong Hun Kim ◽  
...  
Keyword(s):  
Band Gap ◽  
Water Splitting ◽  
Band Gap Energy ◽  
Photoelectrochemical Water Splitting ◽  
Gap Energy ◽  
Pec Water Splitting

Numerous modifications strategies are applied to spinel ZnFe2O4 nanorods with a band gap energy of ∼2.0 eV to enhance their activity as a photoanode for photoelectrochemical (PEC) water splitting.

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>

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.

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