A hydrophilic covalent organic framework for photocatalytic oxidation of benzylamine in water

2020 ◽  
Vol 56 (5) ◽  
pp. 766-769 ◽  
Author(s):  
Ziqian Liu ◽  
Qing Su ◽  
Pengyao Ju ◽  
Xiaodong Li ◽  
Guanghua Li ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Photocatalytic Oxidation ◽  
Ambient Conditions ◽  
Covalent Organic Framework ◽  
Organic Framework

The highly hydrophilic COF exhibits superior photocatalytic activity and recyclability together with environmental benignity in photocatalytic oxidation of benzylamine in water under ambient conditions.

A review on TiO2-based composites for superior photocatalytic activity

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Wail Al Zoubi ◽  
Abbas Ali Salih Al-Hamdani ◽  
Baek Sunghun ◽  
Young Gun Ko
Keyword(s):  
Photocatalytic Activity ◽  
Organic Pollutants ◽  
Cost Efficiency ◽  
High Stability ◽  
Photocatalytic Oxidation ◽  
Oxidation Process ◽  
Ambient Conditions ◽  
Photoelectrochemical Activity ◽  
As Doping ◽  
Degradation Of Pollutants

Abstract Heterogeneous photocatalysts was a promising material for removing organic pollutants. Titanium dioxide (TiO2) was a suitable photocatalyst for its cost efficiency and high stability to reduce various pollutants. Enhancing TiO2 photocatalyst performance by doping with changed metals or non-metal ions and organic compounds have been reviewed. These methods could enhance photoelectrochemical activity via: (i) by a donor of electrons via electron-donor agents that would produce particular defects in TiO2 structure and capture transporters of charge; (ii) by reducing recombination rate of the charge transporters and increasing degradation of pollutants. This study investigates the modification approaches of TiO2 that comprise methods for overcoming the essential TiO2 restrictions and enhancing the photocatalytic degradation of organic pollutants. Consequently, it emphasized on the current progress of modified-TiO2 used for different pollutants in ambient conditions. Amendment techniques, such as inorganic and organic parts as doping, are studied. The reported experimental results obtained with the photocatalytic oxidation process for degrading organic pollutants were also collected and assessed.

A π-electronic covalent organic framework catalyst: π-walls as catalytic beds for Diels–Alder reactions under ambient conditions

2015 ◽  
Vol 51 (50) ◽  
pp. 10096-10098 ◽  
Author(s):  
Yang Wu ◽  
Hong Xu ◽  
Xiong Chen ◽  
Jia Gao ◽  
Donglin Jiang
Keyword(s):  
Heterogeneous Catalysts ◽  
Diels Alder ◽  
Covalent Organic Frameworks ◽  
Ambient Conditions ◽  
Covalent Organic Framework ◽  
Organic Framework

Covalent organic frameworks were developed as heterogeneous catalysts to explore their π-walls as catalytic beds that enabled Diels–Alder reactions under ambient conditions.

Covalent organic framework-supported Fe–TiO2 nanoparticles as ambient-light-active photocatalysts

2019 ◽  
Vol 7 (27) ◽  
pp. 16364-16371 ◽  
Author(s):  
Yumin Zhang ◽  
Yiming Hu ◽  
Jianhong Zhao ◽  
Eunsol Park ◽  
Yinghua Jin ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Tio2 Nanoparticles ◽  
High Efficiency ◽  
Ambient Light ◽  
Covalent Organic Framework ◽  
Organic Framework

COF-supported ultrafine crystalline Fe–TiO2 nanoparticles were prepared, which show ambient light photocatalytic activity with high efficiency, stability, and recyclability.

Engineering structural defects into a covalent organic framework for enhanced photocatalytic activity

2021 ◽  
Author(s):  
Jixian Wang ◽  
Xin-Xin Tian ◽  
Lei Yu ◽  
David James Young ◽  
Wang Wen-Bao ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Band Structure ◽  
Structural Defects ◽  
Covalent Organic Frameworks ◽  
Defect Engineering ◽  
Covalent Organic Framework ◽  
Organic Framework

Defect engineering is a promising methodology for modulating the electronic and band structure of semiconductive materials. A series of covalent organic frameworks, designated TAPT-COF-X (X = mole equivalents of modulator...

Photo-Assisted High Performance Single Atom Electrocatalysis of N2 Reduction Reaction by Mo-embedded Covalent Organic Framework

2021 ◽  
Author(s):  
Juan Wang ◽  
Zhihua Zhang ◽  
Siyun Qi ◽  
Yingcai Fan ◽  
Yanmei Yang ◽  
...  
Keyword(s):  
High Performance ◽  
Low Cost ◽  
Reduction Reaction ◽  
Single Atom ◽  
Ambient Conditions ◽  
Environment Friendly ◽  
Covalent Organic Framework ◽  
High Efficient ◽  
Organic Framework

The development of high efficient, low cost and environment-friendly solutions for the conversion of gas nitrogen to ammonia under ambient conditions has great industrial and academic significance. Single-atom catalysis (SAC)...

Improved photocatalytic performance of covalent organic frameworks by nanostructure construction

2020 ◽  
Vol 56 (33) ◽  
pp. 4567-4570 ◽  
Author(s):  
Lifei Liu ◽  
Bingxing Zhang ◽  
Xiuniang Tan ◽  
Dongxing Tan ◽  
Xiuyan Cheng ◽  
...  
Keyword(s):  
Oxidation Reaction ◽  
High Performance ◽  
Photocatalytic Oxidation ◽  
Photocatalytic Performance ◽  
Covalent Organic Frameworks ◽  
Nanostructured Surfaces ◽  
Covalent Organic Framework ◽  
Mild Conditions ◽  
Organic Framework

Covalent organic framework capsules with nanostructured surfaces were constructed, which exhibit high performance for photocatalytic oxidation reaction under mild conditions.

Efficient dinitrogen fixation on porous covalent organic framework/carbon nanotubes hybrid at low overpotential

2021 ◽  
pp. 2151027
Author(s):  
Qiming Yu ◽  
Hongming Wang
Keyword(s):  
Carbon Nanotubes ◽  
Active Sites ◽  
Rational Design ◽  
Ammonia Synthesis ◽  
Theoretical Calculations ◽  
Ambient Conditions ◽  
Hydrogen Electrode ◽  
Faradaic Efficiency ◽  
Covalent Organic Framework ◽  
Organic Framework

Electrocatalytic nitrogen reduction under ambient conditions is a promising approach for ammonia synthesis, but it is challenging to develop highly efficient electrocatalysts. In this work, a hybrid of covalent organic framework (COF) and carbon nanotubes (CNTs) are developed for efficient nitrogen electroreduction with a high faradaic efficiency (FE) of 12.7% at 0.0 V versus reversible hydrogen electrode (RHE) and a remarkable production rate of ammonia up to 8.56 [Formula: see text]g h[Formula: see text] mg[Formula: see text] at –0.2 V versus RHE. Experiments and theoretical calculations reveal that Ni centers are active sites for NH3 synthesis, while the [Formula: see text]–[Formula: see text] stacking between COF-366-Ni and conductive CNTs scaffold results in the rapid interfacial charge transfer. This investigation provides new insights on the rational design of organic–inorganic porous hybrids for efficient nitrogen conversion and ammonia synthesis at ambient conditions.

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