Efficient band structure tuning, charge separation, and visible-light response in ZrS2-based van der Waals heterostructures

2016 ◽  
Vol 9 (3) ◽  
pp. 841-849 ◽  
Author(s):  
Xirui Zhang ◽  
Zhaoshun Meng ◽  
Dewei Rao ◽  
Yunhui Wang ◽  
Qi Shi ◽  
...  
Keyword(s):  
Band Structure ◽  
Visible Light ◽  
Water Splitting ◽  
Charge Separation ◽  
Van Der Waals ◽  
Light Response ◽  
Van Der Waals Heterostructures ◽  
Visible Light Response

Bilayer ZrS2-based vdW heterostructures are proposed as efficient photocatalysts for water splitting under visible light.

scholarly journals Efficient charge separation and visible-light response in bilayer HfS2-based van der Waals heterostructures

RSC Advances ◽  
2018 ◽  
Vol 8 (34) ◽  
pp. 18889-18895 ◽  
Author(s):  
Biao Wang ◽  
Xukai Luo ◽  
Junli Chang ◽  
Xiaorui Chen ◽  
Hongkuan Yuan ◽  
...  
Keyword(s):  
Charge Separation ◽  
Density Functional ◽  
Van Der Waals ◽  
Light Response ◽  
Hybrid Density Functional Theory ◽  
Functional Theory ◽  
Visible Light Response ◽  
Efficient Charge ◽  
Hybrid Density Functional ◽  
Photocatalytic Applications

In this work, we employ hybrid density functional theory to investigate HfS2-based van der Waals (vdW) heterojunctions for highly efficient photovoltaic and photocatalytic applications.

scholarly journals Au@CoS-BiVO4 {010} Constructed for Visible-Light-Assisted Peroxymonosulfate Activation

Catalysts ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 1414
Author(s):  
Yekun Ji ◽  
Ye Zhou ◽  
Jinnan Wang ◽  
Aimin Li ◽  
Weilin Bian ◽  
...  
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Reaction System ◽  
Light Response ◽  
Pilot Scale ◽  
Sulfate Radical ◽  
Radical Trapping ◽  
Visible Light Response ◽  
Photogenerated Electrons ◽  
Scale Experiment

A visible-light-Fenton-like reaction system was constructed for the selective conversion of peroxymonosulfate to sulfate radical. Au@CoS, when doped on monoclinic BiVO4 {010} facets, promoted spatial charge separation due to the different energy band between the m-BiVO4 {010} and {110} facets. The visible-light response of m-BiVO4 was enhanced, which was attributed to the SPR effect of Au. And the photogenerated electrons were transferred from the m-BiVO4 {010} facet to Au via a Schottky junction. Owing to higher work function, CoS was able to capture these photoelectrons with acceleration of the Co(Ⅱ)/Co(Ⅲ) redox, enhancing peroxymonosulfate conversion to sulfate radical (Co2+ + HSO5−→ Co3+ + •SO4− + OH−). On the other hand, holes accumulated on m-BiVO4 {110} facets also contributed to organics oxidation. Thus, more than 95% of RhB was degraded within 40 min, and, even after five cycles, over 80% of RhB could be removed. The radical trapping experiments and EPR confirmed that both the sulfate radical and photogenerated hole were the main species for organics degradation. UV-vis DRS, photoluminescence (PL) and photoelectrochemical analyses also confirmed the enhancement of the visible-light response and charge separation. In a pilot scale experiment (PMS = 3 mM, initial TOC = 151 mg/L, reaction time = 4 h), CoS-Au-BiVO4 loaded on glass fiber showed a high mineralization rate (>60%) of practical wastewater.

Efficient charge separation and visible-light response of two-dimensional Janus group-III monochalcogenide multilayers

2021 ◽  
Author(s):  
Yujie Bai ◽  
Rongfeng Guan ◽  
Haiyang Zhang ◽  
Qinfang Zhang ◽  
Ning Xu
Keyword(s):  
Visible Light ◽  
Charge Separation ◽  
Light Response ◽  
Two Dimensional ◽  
Excellent Performance ◽  
Electron Hole ◽  
Group Iii ◽  
Efficient Separation ◽  
Visible Light Response ◽  
Efficient Charge

The Janus group-III monochalcogenide multilayers with enhanced built-in electric field exhibit excellent performance in harvesting sunlight and efficient separation of electron–hole pairs.

Blue Phosphorus/Mg(OH)2 van der Waals Heterostructures as Promising Visible-Light Photocatalysts for Water Splitting

2018 ◽  
Vol 122 (13) ◽  
pp. 7075-7080 ◽  
Author(s):  
Bao-Ji Wang ◽  
Xiao-Hua Li ◽  
Xiao-Lin Cai ◽  
Wei-Yang Yu ◽  
Li-Wei Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Water Splitting ◽  
Van Der Waals ◽  
Van Der Waals Heterostructures
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