Covalent organic frameworks as metal-free heterogeneous photocatalysts for organic transformations

2017 ◽  
Vol 5 (44) ◽  
pp. 22933-22938 ◽  
Author(s):  
Yongfeng Zhi ◽  
Ziping Li ◽  
Xiao Feng ◽  
Hong Xia ◽  
Yumin Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Organic Transformations ◽  
Metal Free ◽  
Covalent Organic Framework ◽  
Photocatalytic Performances ◽  
Organic Framework

A robust two-dimensional covalent organic framework (COF-JLU5), which exhibits excellent heterogeneous photocatalytic performances for oxidative C–H functionalizations under visible-light irradiation using O2as a green oxygen source, is reported.

A metal-free covalent organic framework as photocatalyst for CO2 reduction at low CO2 concentration in gas-solid system

2021 ◽  
Author(s):  
Jin-Xian Cui ◽  
Lu-Jie Wang ◽  
Feng Liu ◽  
Bo Meng ◽  
Zi-Yan Zhou ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Co2 Reduction ◽  
Co2 Concentration ◽  
Light Irradiation ◽  
Metal Free ◽  
Covalent Organic Framework ◽  
Low Co2 ◽  
Solid System ◽  
Organic Framework

A β-ketoenamine-based COF is used as photocatalyst to convert CO2 and H2O into CO and O2 under visible-light irradiation without additional photosensitizers and sacrificial agents in gas-solid system. When CO2...

An ultrastable olefin-linked covalent organic framework for photocatalytic decarboxylative alkylations under highly acidic conditions

2021 ◽  
Author(s):  
Miao Tian ◽  
Yichun Wang ◽  
Xiubin Bu ◽  
Yichen Wang ◽  
Xiaobo Yang
Keyword(s):  
Visible Light ◽  
Basic Structure ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Organic Transformations ◽  
Organic Reaction ◽  
Reaction Conditions ◽  
Covalent Organic Framework ◽  
Visible Light Driven ◽  
Acidic Conditions

The application of two-dimensional covalent organic frameworks (2D-COFs) as photoredox catalysts offers a sustainable alternative for visible-light-driven organic transformations. However, under highly complicated organic reaction conditions, maintaining their basic structure...

Highly dispersed Ru nanoparticles on a bipyridine-linked covalent organic framework for efficient photocatalytic CO2 reduction

2021 ◽  
Author(s):  
Ziling Liu ◽  
Yaqi Huang ◽  
Shuqing Chang ◽  
Xiaoli Zhu ◽  
Yanghe Fu ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
Co2 Reduction ◽  
Light Irradiation ◽  
Covalent Organic Framework ◽  
Ru Nanoparticles ◽  
Highly Dispersed ◽  
Organic Framework

Highly dispersed Ru nanoparticles are confined in a photosensitizing bipyridine-linked covalent organic framework to construct Ru@TpBpy composites, exhibiting significantly enhanced activities for CO2 reduction under visible-light irradiation.

scholarly journals Facile construction of fully sp2-carbon conjugated two-dimensional covalent organic frameworks containing benzobisthiazole units

2022 ◽  
Vol 13 (1) ◽  
Author(s):  
Yuancheng Wang ◽  
Wenbo Hao ◽  
Hui Liu ◽  
Renzeng Chen ◽  
Qingyan Pan ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Functional Groups ◽  
Visible Light Irradiation ◽  
Mild Condition ◽  
Light Irradiation ◽  
Two Dimensional ◽  
Covalent Organic Frameworks ◽  
Huge Challenge

AbstractDeveloping a facile strategy for the construction of vinylene-linked fully π-conjugated covalent organic frameworks (COFs) remains a huge challenge. Here, a versatile condition of Knoevenagel polycondensation for constructing vinylene-linked 2D COFs was explored. Three new examples of vinylene-linked 2D COFs (BTH-1, 2, 3) containing benzobisthiazoles units as functional groups were successfully prepared under this versatile and mild condition. The electron-deficient benzobisthiazole units and cyano-vinylene linkages were both integrated into the π conjugated COFs skeleton and acted as acceptor moieties. Interestingly, we found the construction of a highly ordered and conjugated D-A system is favorable for photocatalytic activity. BTH-3 with benzotrithiophene as the donor with a strong D-A effect exhibited an attractive photocatalytic HER of 15.1 mmol h−1g−1 under visible light irradiation.

Donor–acceptor covalent organic framework/g-C3N4 hybrids for efficient visible light photocatalytic H2 production

2021 ◽  
Author(s):  
Chenxiang Lin ◽  
Chaozheng Han ◽  
Lei Gong ◽  
Xin Chen ◽  
Jinxia Deng ◽  
...  
Keyword(s):  
Visible Light ◽  
Visible Light Irradiation ◽  
H2 Production ◽  
Light Irradiation ◽  
Evolution Rate ◽  
Covalent Organic Framework ◽  
Donor Acceptor ◽  
Visible Light Photocatalytic ◽  
Organic Framework

A donor–acceptor type covalent organic framework (COF) was used to construct TBTA/g-C3N4 hybrids for photocatalytic H2 evolution. Under visible light irradiation, the hybrids exhibited an optimized H2 evolution rate of 11.73 mmol g−1 h−1 without Pt.

Linking Melem with Conjugated Schiff-Base Bond to Boost Photocatalytic Efficiency of Carbon Nitride for Overall Water Splitting

Nanoscale ◽  
2021 ◽  
Author(s):  
Hu Liu ◽  
Mengqi Shen ◽  
Peng Zhou ◽  
Zhi Guo ◽  
Xinyang Liu ◽  
...  
Keyword(s):  
Schiff Base ◽  
Visible Light ◽  
Water Splitting ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Efficiency ◽  
Metal Free ◽  
Overall Water Splitting

Developing an efficient single component photocatalyst for overall water splitting under visible-light irradiation is extremely challenging. Herein, we report a metal-free graphitic carbon nitride (g-CxN4)-based nanosheet photocatalyst (x = 3.2,...

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