Study on water splitting characteristics of CdS nanosheets driven by the coupling effect between photocatalysis and piezoelectricity

Nanoscale ◽  
2019 ◽  
Vol 11 (18) ◽  
pp. 9085-9090 ◽  
Author(s):  
Yan Zhao ◽  
Xueyan Huang ◽  
Fan Gao ◽  
Lulu Zhang ◽  
Qinfen Tian ◽  
...  
Keyword(s):  
Electric Field ◽  
Water Splitting ◽  
Coupling Effect ◽  
Carrier Separation

This study introduces a built-in electric field in a one-component nanosheet to promote photo-generated carrier separation.

Built-in electric field for photocatalytic overall water splitting through a TiO2/BiOBr P–N heterojunction

Nanoscale ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 4496-4504
Author(s):  
Qianqian Chi ◽  
Genping Zhu ◽  
Dongmei Jia ◽  
Wei Ye ◽  
Yikang Wang ◽  
...  
Keyword(s):  
Electric Field ◽  
Water Splitting ◽  
Photocatalytic Water Splitting ◽  
Overall Water Splitting

A p–n heterojunction of TiO2/BiOBr with a strong built-in electric field has been constructed to simultaneously obtain hydrogen and oxygen through a photocatalytic water splitting.

scholarly journals Rolling the WSSe Bilayer into Double-Walled Nanotube for the Enhanced Photocatalytic Water-Splitting Performance

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 705
Author(s):  
Lin Ju ◽  
Jingzhou Qin ◽  
Liran Shi ◽  
Gui Yang ◽  
Jing Zhang ◽  
...  
Keyword(s):  
Water Splitting ◽  
Density Functional ◽  
Transition Metal Dichalcogenides ◽  
Density Functional Theory Calculations ◽  
Stable Configuration ◽  
Photocatalytic Water Splitting ◽  
Stacking Pattern ◽  
Metal Dichalcogenides ◽  
Photocatalytic Performances ◽  
Carrier Separation

For the emerging Janus transition metal dichalcogenides (TMD) layered water-splitting photocatalysts, stacking the monolayers to form bilayers has been predicted to be an effective way to improve their photocatalytic performances. To achieve this, the stacking pattern plays an important role. In this work, by means of the density functional theory calculations, we comprehensively estimate energetical stability, light absorption and redox capacity of Janus WSSe bilayer with different stacking patterns. Unfortunately, the Janus WSSe bilayer with the most stable configuration recover the out-of-plane symmetry, which is not in favor of the photocatalytic reactions. However, rolling the Janus WSSe bilayer into double-walled nanotube could stabilize the appropriate stacking pattern with an enhanced instinct dipole moment. Moreover, the suitable band edge positions, high visible light absorbance, outstanding solar-to-hydrogen efficiency (up to 28.48%), and superior carrier separation promise the Janus WSSe double-walled nanotube the potential for the photocatalytic water-splitting application. Our studies not only predict an ideal water-splitting photocatalyst, but also propose an effective way to improve the photocatalytic performances of Janus layered materials.

Electric-field control of field-free spin-orbit torque switching via laterally modulated Rashba effect in Pt/Co/AlOx structures

2020 ◽  
Author(s):  
Min-Gu Kang ◽  
Jong-Guk Choi ◽  
Jimin Jeong ◽  
Jae Yeol Park ◽  
Hyeon-Jong Park ◽  
...  
Keyword(s):  
Electric Field ◽  
Coupling Effect ◽  
Spin Orbit ◽  
Rashba Effect ◽  
Oxide Interface ◽  
Electrical Control ◽  
Perpendicular Magnetization ◽  
Field Control ◽  
Out Of Plane ◽  
Logic Operations

Abstract Spin-orbit coupling effect in structures with broken inversion symmetry, known as the Rashba effect, facilitates spin-orbit torques (SOTs) in heavy metal/ferromagnet/oxide structures, along with the spin Hall effect. Electric-field control of the Rashba effect is established for semiconductor interfaces, but it is challenging in structures involving metals owing to the screening effect. Here, we report that the Rashba effect in Pt/Co/AlOx structures is laterally modulated by electric voltages, generating out-of-plane SOTs. This enables field-free switching of the perpendicular magnetization and electrical control of the switching polarity. Changing the gate oxide reverses the sign of out-of-plane SOT while maintaining the same sign of voltage-controlled magnetic anisotropy, which confirms the Rashba effect at the Co/oxide interface is a key ingredient of the electric-field modulation. The electrical control of SOT switching polarity in a reversible and non-volatile manner can be utilized for programmable logic operations in spintronic logic-in-memory devices.

Study of the GaAs/SiH van der Waals type-II heterostructure: a high efficiency photocatalyst promoted by a built-in electric field

2020 ◽  
Vol 22 (16) ◽  
pp. 8565-8571
Author(s):  
Shuaicheng Han ◽  
Yuee Li ◽  
Jian Chai ◽  
Zhong Wang
Keyword(s):  
Electric Field ◽  
Visible Light ◽  
Water Splitting ◽  
High Efficiency ◽  
Van Der Waals ◽  
Type Ii

The built-in electric field promotes GaAs/SiH as a high efficiency photocatalyst for water splitting in visible light.

Boosting photocatalytic water splitting by tuning built-in electric field at phase junction

2019 ◽  
Vol 7 (17) ◽  
pp. 10264-10272 ◽  
Author(s):  
Jing Zhang ◽  
Xuebing Chen ◽  
Yu Bai ◽  
Chun Li ◽  
Ying Gao ◽  
...  
Keyword(s):  
Electric Field ◽  
Water Splitting ◽  
Charge Separation ◽  
Driving Force ◽  
Photocatalytic Water Splitting ◽  
Spatial Charge

Constructing a built-in electric field at the interface of semiconductors has been demonstrated to provide the driving force for spatial charge separation in photocatalysis.

Sign in / Sign up

Export Citation Format

Share Document