A simple melamine-assisted exfoliation of polymeric graphitic carbon nitrides for highly efficient hydrogen production from water under visible light

2015 ◽  
Vol 3 (44) ◽  
pp. 22404-22412 ◽  
Author(s):  
Longtao Ma ◽  
Huiqing Fan ◽  
Mengmeng Li ◽  
Hailin Tian ◽  
Jiawen Fang ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Hydrogen Production ◽  
Visible Light ◽  
Surface Area ◽  
Electronic Transport ◽  
Graphitic Carbon ◽  
Highly Efficient ◽  
Carbon Nitrides

Compared to the bulk-CN, the quasi-2D-CN possesses a unique electronic structure, enlarged bandgap, prolonged lifetime, increased surface area and enhanced electronic transport, and exhibits highly efficient hydrogen production from water under visible light.

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.

A Heterojunction Cu2O/N–TiO2Photocatalyst for Highly Efficient Visible Light-Driven Hydrogen Production

2016 ◽  
Vol 146 (9) ◽  
pp. 1655-1662 ◽  
Author(s):  
Xiang-Yu Liu ◽  
Wen-Dong Wei ◽  
Shi-Cong Cui ◽  
Jin-Gang Liu
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Highly Efficient ◽  
Visible Light Driven

scholarly journals 2D Metal Organic Framework Nanosheet: A Universal Platform Promoting Highly Efficient Visible‐Light‐Induced Hydrogen Production

2019 ◽  
Vol 9 (11) ◽  
pp. 1803402 ◽  
Author(s):  
Jingrun Ran ◽  
Jiangtao Qu ◽  
Hongping Zhang ◽  
Tian Wen ◽  
Hailong Wang ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Metal Organic Framework ◽  
Highly Efficient ◽  
Metal Organic ◽  
Organic Framework

The application of Ni and Cu-MOFs as highly efficient catalysts for visible light-driven tetracycline degradation and hydrogen production

2021 ◽  
Vol 9 (1) ◽  
pp. 238-248
Author(s):  
Qigao Shang ◽  
Nannan Liu ◽  
Dan You ◽  
Qingrong Cheng ◽  
Guiying Liao ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Visible Light ◽  
Highly Efficient ◽  
Tetracycline Degradation ◽  
Visible Light Driven

The application of Ni and Cu-MOFs as highly efficient catalysts for visible light-driven TC degradation and hydrogen production.

Preparation of Nitrogen-Deficient Graphitic Carbon Nitride with a Large Specific Surface Area by Melt Pretreatment and Its Photocatalytic Performance

NANO ◽  
2020 ◽  
Vol 15 (06) ◽  
pp. 2050079
Author(s):  
Xuelei Li ◽  
Jinfeng Bai ◽  
Jiaqi Li ◽  
Chao Li ◽  
Junru Zhang ◽  
...  
Keyword(s):  
Visible Light ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Carbon Nitride ◽  
Mesoporous Structure ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Large Specific Surface Area ◽  
X Ray

In this study, nitrogen-deficient graphitic carbon nitride (M-LS-g-C3N4) with a mesoporous structure and a large specific surface area was obtained by calcination after melt pretreatment using urea as a precursor. X-ray diffraction (XRD), transmission electron microscopy (TEM), N2 adsorption, X-ray photoelectron spectroscopy (XPS), UV-Vis, ESR and photoluminescence (PL) were used to characterize the structure, morphology and optical performance of the samples. The TEM results showed the formation of a mesoporous structure on the 0.1[Formula: see text]M-LS-g-C3N4 surface. The porous structure led to an increase in the specific surface area from 41.5[Formula: see text]m2/g to 124.3[Formula: see text]m2/g. The UV-Vis results showed that nitrogen vacancies generated during the modification process reduced the band gap of g-C3N4 and improved the visible light absorption. The PL spectra showed that the nitrogen defects promoted the separation of photogenerated electron–hole pairs. In the visible light degradation of methyl orange (MO), the reaction rate constant of 0.1[Formula: see text]M-LS-g-C3N4 reached 0.0086[Formula: see text][Formula: see text], which was 5.05 times that of pure g-C3N4. Superoxide radicals and photogenerated holes were found to be the main active species in the reaction system. This study provides an efficient, green and convenient means of preparing graphitic carbon nitride with a large specific surface area.

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