Non-covalent doping of carbon nitride with biochar: Boosted peroxymonosulfate activation performance and unexpected singlet oxygen evolution mechanism

2021 ◽  
pp. 129504
Author(s):  
Huazhe Wang ◽  
Wanqian Guo ◽  
Qishi Si ◽  
Banghai Liu ◽  
Qi Zhao ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Oxygen Evolution ◽  
Carbon Nitride ◽  
Evolution Mechanism

scholarly journals Identifying the Oxygen Evolution Mechanism by Microkinetic Modelling of Cyclic Voltammograms

2021 ◽  
pp. 137902
Author(s):  
Janis Geppert ◽  
Fabian Kubannek ◽  
Philipp Röse ◽  
Ulrike Krewer
Keyword(s):  
Oxygen Evolution ◽  
Cyclic Voltammograms ◽  
Evolution Mechanism

Synergistic modulation of the metal-free photocatalysts by composition ratio change and heteroatom doping for overall water splitting

2021 ◽  
Author(s):  
Jianxiong Tian ◽  
Zhaobo Zhou ◽  
Sheng Zhang ◽  
Zhixia Li ◽  
Li Shi ◽  
...  
Keyword(s):  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Carbon Nitride ◽  
Reaction Rate ◽  
Graphitic Carbon Nitride ◽  
Heteroatom Doping ◽  
Metal Free ◽  
Ratio Change ◽  
Synergistic Modulation

The graphitic carbon nitride (g-C3N4) based metal-free photocatalyts have attracted growing attention in recent years, while the efficiency is largely limited by the slow reaction rate of oxygen evolution reaction...

scholarly journals Single-atom cobalt-hydroxyl modification of polymeric carbon nitride for highly enhanced photocatalytic water oxidation: ball milling increased single atom loading

2022 ◽  
Author(s):  
Fei Yu ◽  
Tingting Huo ◽  
Quanhua Deng ◽  
Guoan Wang ◽  
Yuguo Xia ◽  
...  
Keyword(s):  
Ball Milling ◽  
Water Splitting ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Water Oxidation ◽  
Carbon Nitride ◽  
Single Atom ◽  
Overall Water Splitting ◽  
Polymeric Carbon

Expediting the oxygen evolution reaction (OER) is the key to achieving efficient photocatalytic overall water splitting. Herein, single-atom Co−OH modified polymeric carbon nitride (Co-PCN) was synthesized with single-atom loading increased...

Graphitic carbon nitride supported single-atom catalysts for efficient oxygen evolution reaction

2016 ◽  
Vol 52 (90) ◽  
pp. 13233-13236 ◽  
Author(s):  
Xiyu Li ◽  
Peng Cui ◽  
Wenhui Zhong ◽  
Jun Li ◽  
Xijun Wang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Carbon Nitride ◽  
Low Cost ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Single Atom ◽  
New Class

Single-atom catalysts of TM@CN would lead to a new class of low-cost, durable and efficient OER catalysts.

Synergy of Dopants and Defects in Graphitic Carbon Nitride with Exceptionally Modulated Band Structures for Efficient Photocatalytic Oxygen Evolution

2019 ◽  
Vol 31 (43) ◽  
pp. 1903545 ◽  
Author(s):  
Daming Zhao ◽  
Chung‐Li Dong ◽  
Bin Wang ◽  
Chao Chen ◽  
Yu‐Cheng Huang ◽  
...  
Keyword(s):  
Oxygen Evolution ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Band Structures

scholarly journals Surface-Doped Graphitic Carbon Nitride Catalyzed Photooxidation of Olefins and Dienes: Chemical Evidence for Electron Transfer and Singlet Oxygen Mechanisms

Catalysts ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 639 ◽  
Author(s):  
Apostolos Chatzoudis ◽  
Vasileios Giannopoulos ◽  
Frank Hollmann ◽  
Ioulia Smonou
Keyword(s):  
Electron Transfer ◽  
Energy Transfer ◽  
Singlet Oxygen ◽  
Carbon Nitride ◽  
Solvent Polarity ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Electron Transfer Mechanism ◽  
Heterogeneous Nature ◽  
Chemical Evidence

A new photocatalytic reactivity of carbon-nanodot-doped graphitic carbon nitride (CD-C3N4) with alkenes and dienes, has been disclosed. We have shown that CD-C3N4 photosensitizes the oxidation of unsaturated substrates in a variety of solvents according to two competing mechanisms: the energy transfer via singlet oxygen (1O2) and/or the electron transfer via superoxide (O·−2). The singlet oxygen, derived by the CD-C3N4 photosensitized process, reacts with alkenes to form allylic hydroperoxides (ene products) whereas with dienes, endoperoxides. When the electron transfer mechanism operates, cleavage products are formed, derived from the corresponding dioxetanes. Which of the two mechanisms will prevail depends on solvent polarity and the particular substrate. The photocatalyst remains stable under the photooxidation conditions, unlike the most conventional photosensitizers, while the heterogeneous nature of CD-C3N4 overcomes usual solubility problems.

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