Highly efficient and selective removal of cadmium from aqueous solutions based on magnetic graphitic carbon nitride materials with molecularly imprinted polymers

2020 ◽  
Vol 1221 ◽  
pp. 128887
Author(s):  
Shuangzhen Guo ◽  
Fan Zhang ◽  
Da Li ◽  
Pengpeng Jiao
Keyword(s):  
Aqueous Solutions ◽  
Molecularly Imprinted Polymers ◽  
Carbon Nitride ◽  
Selective Removal ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Highly Efficient ◽  
Carbon Nitride Materials

scholarly journals Band Engineering and Morphology Control of Oxygen-Incorporated Graphitic Carbon Nitride Porous Nanosheets for Highly Efficient Photocatalytic Hydrogen Evolution

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Yunyan Wu ◽  
Pan Xiong ◽  
Jianchun Wu ◽  
Zengliang Huang ◽  
Jingwen Sun ◽  
...  
Keyword(s):  
Surface Area ◽  
Hydrogen Evolution ◽  
Carbon Nitride ◽  
Separation Efficiency ◽  
Physical Adsorption ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Photocatalytic Hydrogen Evolution ◽  
Band Engineering ◽  
Highly Efficient

AbstractGraphitic carbon nitride (g-C3N4)-based photocatalysts have shown great potential in the splitting of water. However, the intrinsic drawbacks of g-C3N4, such as low surface area, poor diffusion, and charge separation efficiency, remain as the bottleneck to achieve highly efficient hydrogen evolution. Here, a hollow oxygen-incorporated g-C3N4 nanosheet (OCN) with an improved surface area of 148.5 m2 g−1 is fabricated by the multiple thermal treatments under the N2/O2 atmosphere, wherein the C–O bonds are formed through two ways of physical adsorption and doping. The physical characterization and theoretical calculation indicate that the O-adsorption can promote the generation of defects, leading to the formation of hollow morphology, while the O-doping results in reduced band gap of g-C3N4. The optimized OCN shows an excellent photocatalytic hydrogen evolution activity of 3519.6 μmol g−1 h−1 for ~ 20 h, which is over four times higher than that of g-C3N4 (850.1 μmol g−1 h−1) and outperforms most of the reported g-C3N4 catalysts.

Unprecedented Wiring Efficiency of Sulfonated Graphitic Carbon Nitride Materials: Toward High-Performance Amperometric Recombinant CotA Laccase Biosensors

2018 ◽  
Vol 7 (1) ◽  
pp. 1474-1484 ◽  
Author(s):  
Alain R. Puente-Santiago ◽  
Daily Rodríguez-Padrón ◽  
Xuebo Quan ◽  
Mario J. Muñoz Batista ◽  
Lígia O. Martins ◽  
...  
Keyword(s):  
High Performance ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Cota Laccase ◽  
Carbon Nitride Materials

scholarly journals Photocatalytic (Hetero)Arylation of C(sp3)–H Bonds with Carbon Nitride

2020 ◽  
Author(s):  
Saikat Das ◽  
Kathiravan Murugesan ◽  
GONZALO JAVIER VILLEGAS RODRIGUEZ ◽  
Jaspreet Kaur ◽  
Joshua Barham ◽  
...  
Keyword(s):  
Organic Semiconductor ◽  
Carbon Nitride ◽  
Hydrogen Atom Transfer ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Nickel Catalysis ◽  
Direct Functionalization ◽  
Low Toxicity ◽  
Homogeneous Photocatalysis ◽  
Carbon Nitride Materials

Polymeric graphitic carbon nitride materials have attracted significant interest in recent years and found applications in diverse light-to-energy conversions such as artificial photosynthesis, CO<sub>2 </sub>reduction or degradation of organic pollutants. However, their utilization in synthetic photocatalysis especially in the direct functionalization of C(sp<sup>3</sup>)−H bonds remains underexplored. Herein, we report mesoporous graphitic carbon nitride (mpg-CN) as a heterogeneous organic semiconductor photocatalyst for direct arylation of sp<sup>3</sup> C−H bonds <i>via </i>a combination of<i> </i>hydrogen atom transfer and nickel catalysis. Our protocol has a broad synthetic scope (>70 examples including late-stage modification of densely functionalized bio-active molecules), is operationally simple, and shows high chemo- and regioselectivity. Facile separation and recycling of the mpg-CN catalyst in combination with its low preparation cost, innate photochemical stability and low toxicity are beneficial features overcoming typical shortcomings of homogeneous photocatalysis. Additionally, mechanistic investigations indicate that an unprecedented energy transfer process (EnT) from the organic semiconductor to the nickel complex is operating.

Sign in / Sign up

Export Citation Format

Share Document