Increased Visible Light Absorption and Charge Separation in 2D-3D In 2S 3-ZnO Heterojunctions for Enhanced Photoelectrochemical Water Splitting

2021 ◽  
Author(s):  
Narinder Kaur ◽  
Abhishek Ghosh ◽  
Mujeeb Ahmad ◽  
Dipika Sharma ◽  
Rajendra Singh ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Charge Separation ◽  
Photoelectrochemical Water Splitting ◽  
Visible Light Absorption

Carrier Engineering of Zr-mediated Ta3N5 Film as Efficient Photoanode for Solar Water Splitting

2021 ◽  
Author(s):  
Xin Zou ◽  
Xueyang Han ◽  
Chengxiong Wang ◽  
Yunkun Zhao ◽  
Chun Du ◽  
...  
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Photoelectrochemical Water Splitting ◽  
Promising Candidate ◽  
Visible Light Absorption ◽  
Solar Water ◽  
Solar Water Splitting

Ta3N5 is regarded as a promising candidate material with adequate visible light absorption and band structure for photoelectrochemical water splitting. However, the performance of Ta3N5 is severely limited by the...

scholarly journals Embedded carbon in a carbon nitride hollow sphere for enhanced charge separation and photocatalytic water splitting

Nanoscale ◽  
2020 ◽  
Vol 12 (13) ◽  
pp. 7339-7346 ◽  
Author(s):  
Lei Luo ◽  
Jiani Ma ◽  
Haixing Zhu ◽  
Junwang Tang
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Hollow Sphere ◽  
Light Absorption ◽  
Charge Separation ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Visible Light Absorption ◽  
Templating Method ◽  
Shape Selective

Graphitic carbon was fully embedded inside the graphitic carbon nitride hollow sphere via the modified shape-selective templating method in order to enchance visible light absorption and promote charge seperation.

One-step synthesis of novel Cu2ZnNiO3 complex oxide nanowires with tuned band gap for photoelectrochemical water splitting

2020 ◽  
Vol 53 (6) ◽  
pp. 1425-1433
Author(s):  
Aya Amin ◽  
Ali El-dissouky
Keyword(s):  
Visible Light ◽  
Band Gap ◽  
Water Splitting ◽  
Light Absorption ◽  
Complex Oxide ◽  
Photoelectrochemical Water Splitting ◽  
Visible Light Absorption ◽  
Oxide Nanowires ◽  
Tauc Plot ◽  
One Step

Although alloying and nanostructuring offer a great opportunity for enhancing photoelectrochemical behavior and band gap tuning, these methods have not been investigated extensively. This article reports the synthesis of Cu2ZnNiO3 complex oxide nanowires (∼200 nm) grown on German silver alloy via a one-step optimized hydrothermal route and their utilization to split water photoelectrochemically. Surface characterizations were used to elucidate the formation mechanism of the Cu2ZnNiO3 complex oxide nanowires. The nanowires exhibited an exceptional visible light absorption extending from 400 to 1400 nm wavelengths with a tuned band gap of ∼2.88 eV calculated from the corresponding Tauc plot. In tests to split water photoelectrochemically, the nanowires generated a significant photocurrent of up to −2.5 mA cm−2 at −0.8 V versus Ag/AgCl and exhibited an exceptional photostability which exceeded 2 h under light-off conditions with no photocurrent decay. Band edge positions related to water redox potentials were estimated via Mott–Schottky and diffuse reflectance spectroscopy analysis with the density of charge carriers reaching as high as 5.15 × 1018 cm−3. Moreover, the nanowires generated ∼1100 µmol of H2 in 5 h. These photoelectrochemical results are much higher than the reported values for similar structures of copper oxide, zinc oxide and nickel oxide separately under the same conditions, which can be attributed to the advantages of Cu, Zn and Ni oxides (such as visible light absorption, photostability, and efficient charge carrier generation and transport) being combined in one single material. These promising results make German silver a robust material toward photoelectrochemical water splitting.

scholarly journals Studies on the substrate-dependent photocatalytic properties of Cu2O heterojunctions

RSC Advances ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 4935-4941
Author(s):  
Riza Ariyani Nur Khasanah ◽  
Hui-Ching Lin ◽  
Hsiang-Yun Ho ◽  
Yen-Ping Peng ◽  
Tsong-Shin Lim ◽  
...  
Keyword(s):  
Visible Light ◽  
Light Absorption ◽  
Charge Separation ◽  
Spectral Response ◽  
Photocatalytic Properties ◽  
Visible Light Absorption ◽  
Uv Visible

Cu2O/TNA/Ti photoanode showed spectral response outperformed Cu2O/Ti and Cu2O/FTO photocathodes. Cu2O/TNA/Ti showed better spectral response than that of TNA/Ti, ascribed to UV-visible light absorption of Cu2O, not to charge separation enhancement.

Zr doped mesoporous LaTaON2 for efficient photocatalytic water splitting

2019 ◽  
Vol 7 (10) ◽  
pp. 5702-5711 ◽  
Author(s):  
Yawei Wang ◽  
Shu Jin ◽  
Guoxiang Pan ◽  
Zuxin Li ◽  
Long Chen ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Light Absorption ◽  
Visible Light Absorption ◽  
Photocatalytic Water Splitting ◽  
Photocatalytic Activities

Zr doping maintains the visible light absorption of LaTaON2 and contributes to enhanced photocatalytic activities for water splitting.

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