Effect of Different Functional Groups on Photocatalytic Hydrogen Evolution in Covalent‐Organic Frameworks

ChemCatChem ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 2313-2319 ◽  
Author(s):  
Jing‐Li Sheng ◽  
Hong Dong ◽  
Xiang‐Bin Meng ◽  
Hong‐Liang Tang ◽  
Yu‐Hao Yao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Functional Groups ◽  
Covalent Organic Frameworks ◽  
Photocatalytic Hydrogen Evolution

scholarly journals Sulfone-containing covalent organic frameworks for photocatalytic hydrogen evolution from water

2018 ◽  
Vol 10 (12) ◽  
pp. 1180-1189 ◽  
Author(s):  
Xiaoyan Wang ◽  
Linjiang Chen ◽  
Samantha Y. Chong ◽  
Marc A. Little ◽  
Yongzhen Wu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Covalent Organic Frameworks ◽  
Photocatalytic Hydrogen Evolution

scholarly journals Rational design of isostructural 2D porphyrin-based covalent organic frameworks for tunable photocatalytic hydrogen evolution

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Rufan Chen ◽  
Yang Wang ◽  
Yuan Ma ◽  
Arindam Mal ◽  
Xiao-Ya Gao ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Rational Design ◽  
Hydrogen Generation ◽  
Structure Design ◽  
Molecular Engineering ◽  
Valuable Insight ◽  
Covalent Organic Frameworks ◽  
Structure Property ◽  
Photocatalytic Hydrogen Evolution ◽  
Photocatalytic Hydrogen Generation

AbstractCovalent organic frameworks have recently gained increasing attention in photocatalytic hydrogen generation from water. However, their structure-property-activity relationship, which should be beneficial for the structural design, is still far-away explored. Herein, we report the designed synthesis of four isostructural porphyrinic two-dimensional covalent organic frameworks (MPor-DETH-COF, M = H2, Co, Ni, Zn) and their photocatalytic activity in hydrogen generation. Our results clearly show that all four covalent organic frameworks adopt AA stacking structures, with high crystallinity and large surface area. Interestingly, the incorporation of different transition metals into the porphyrin rings can rationally tune the photocatalytic hydrogen evolution rate of corresponding covalent organic frameworks, with the order of CoPor-DETH-COF < H2Por-DETH-COF < NiPor-DETH-COF < ZnPor-DETH-COF. Based on the detailed experiments and calculations, this tunable performance can be mainly explained by their tailored charge-carrier dynamics via molecular engineering. This study not only represents a simple and effective way for efficient tuning of the photocatalytic hydrogen evolution activities of covalent organic frameworks at molecular level, but also provides valuable insight on the structure design of covalent organic frameworks for better photocatalysis.

Sulfur-doped covalent triazine-based frameworks for enhanced photocatalytic hydrogen evolution from water under visible light

2016 ◽  
Vol 4 (32) ◽  
pp. 12402-12406 ◽  
Author(s):  
Liuyi Li ◽  
Wei Fang ◽  
Peng Zhang ◽  
Jinhong Bi ◽  
Yunhui He ◽  
...  
Keyword(s):  
Visible Light ◽  
Hydrogen Evolution ◽  
Simple Approach ◽  
Covalent Organic Frameworks ◽  
Photocatalytic Hydrogen Evolution

Sulfur-doped covalent organic frameworks were synthesized via a simple approach for enhanced photocatalytic hydrogen evolution from water under visible light.

scholarly journals Protonated imine‐linked covalent organic frameworks for photocatalytic hydrogen evolution

2021 ◽  
Author(s):  
Jin Yang ◽  
Amitava Acharjya ◽  
Meng-Yang Ye ◽  
Jabor Rabeah ◽  
Shuang Li ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Covalent Organic Frameworks ◽  
Photocatalytic Hydrogen Evolution ◽  
Protonated Imine

scholarly journals PEG-stabilized coaxial stacking of two-dimensional covalent organic frameworks for enhanced photocatalytic hydrogen evolution

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ting Zhou ◽  
Lei Wang ◽  
Xingye Huang ◽  
Junjuda Unruangsri ◽  
Hualei Zhang ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Unique Feature ◽  
Layer By Layer ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Innovative Strategy ◽  
Photocatalytic Hydrogen Evolution ◽  
Visible Irradiation ◽  
Periodic Frameworks ◽  
Post Functionalization

AbstractTwo-dimensional covalent organic frameworks (2D COFs) featuring periodic frameworks, extended π-conjugation and layered stacking structures, have emerged as a promising class of materials for photocatalytic hydrogen evolution. Nevertheless, the layer-by-layer assembly in 2D COFs is not stable during the photocatalytic cycling in water, causing disordered stacking and declined activity. Here, we report an innovative strategy to stabilize the ordered arrangement of layered structures in 2D COFs for hydrogen evolution. Polyethylene glycol is filled up in the mesopore channels of a β-ketoenamine-linked COF containing benzothiadiazole moiety. This unique feature suppresses the dislocation of neighbouring layers and retains the columnar π-orbital arrays to facilitate free charge transport. The hydrogen evolution rate is therefore remarkably promoted under visible irradiation compared with that of the pristine COF. This study provides a general post-functionalization strategy for 2D COFs to enhance photocatalytic performances.

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