The synergy between electronic anchoring effect and internal electric field in CdS quantum dots decorated dandelion-like Fe-CeO2 nanoflowers for improved photocatalytic hydrogen evolution

2019 ◽  
Vol 549 ◽  
pp. 179-188 ◽  
Author(s):  
Dandan Ma ◽  
Diankun Sun ◽  
Yajun Zou ◽  
Siman Mao ◽  
Yixuan Lv ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Electric Field ◽  
Hydrogen Evolution ◽  
Internal Electric Field ◽  
Cds Quantum Dots ◽  
Photocatalytic Hydrogen Evolution ◽  
Anchoring Effect

A highly efficient noble metal free photocatalytic hydrogen evolution system containing MoP and CdS quantum dots

Nanoscale ◽  
2016 ◽  
Vol 8 (30) ◽  
pp. 14438-14447 ◽  
Author(s):  
Shengming Yin ◽  
Jianyu Han ◽  
Yinjun Zou ◽  
Tianhua Zhou ◽  
Rong Xu
Keyword(s):  
Quantum Dots ◽  
Hydrogen Evolution ◽  
Noble Metal ◽  
Evolution System ◽  
Cds Quantum Dots ◽  
Photocatalytic Hydrogen Evolution ◽  
Metal Free ◽  
Highly Efficient

scholarly journals Ligand removal from CdS quantum dots for enhanced photocatalytic H2 generation in pH neutral water

2016 ◽  
Vol 4 (8) ◽  
pp. 2856-2862 ◽  
Author(s):  
Christina M. Chang ◽  
Katherine L. Orchard ◽  
Benjamin C. M. Martindale ◽  
Erwin Reisner
Keyword(s):  
Quantum Dots ◽  
Hydrogen Evolution ◽  
Cds Quantum Dots ◽  
Photocatalytic Hydrogen Evolution ◽  
H2 Generation ◽  
Surface Capping ◽  
Cds Qds ◽  
Neutral Water ◽  
Photocatalytic H2 Generation ◽  
Capping Ligands

Photocatalytic hydrogen evolution activity of CdS QDs is 175 times higher in pH neutral water when surface capping ligands are removed.

scholarly journals Interfacial chemical bond and internal electric field modulated Z-scheme Sv-ZnIn2S4/MoSe2 photocatalyst for efficient hydrogen evolution

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xuehua Wang ◽  
Xianghu Wang ◽  
Jianfeng Huang ◽  
Shaoxiang Li ◽  
Alan Meng ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Electric Field ◽  
Hydrogen Evolution ◽  
Density Functional ◽  
Monochromatic Light ◽  
Density Functional Theory Calculations ◽  
Internal Electric Field ◽  
Apparent Quantum Yield ◽  
Paramagnetic Resonance ◽  
High Hydrogen

AbstractConstruction of Z-scheme heterostructure is of great significance for realizing efficient photocatalytic water splitting. However, the conscious modulation of Z-scheme charge transfer is still a great challenge. Herein, interfacial Mo-S bond and internal electric field modulated Z-scheme heterostructure composed by sulfur vacancies-rich ZnIn2S4 and MoSe2 was rationally fabricated for efficient photocatalytic hydrogen evolution. Systematic investigations reveal that Mo-S bond and internal electric field induce the Z-scheme charge transfer mechanism as confirmed by the surface photovoltage spectra, DMPO spin-trapping electron paramagnetic resonance spectra and density functional theory calculations. Under the intense synergy among the Mo-S bond, internal electric field and S-vacancies, the optimized photocatalyst exhibits high hydrogen evolution rate of 63.21 mmol∙g−1·h−1 with an apparent quantum yield of 76.48% at 420 nm monochromatic light, which is about 18.8-fold of the pristine ZIS. This work affords a useful inspiration on consciously modulating Z-scheme charge transfer by atomic-level interface control and internal electric field to signally promote the photocatalytic performance.

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