The photocatalytic NO-removal activity of g-C3N4 significantly enhanced by the synergistic effect of Pd0 nanoparticles and N vacancies

2022 ◽  
Author(s):  
Guohui Dong ◽  
Jiahao Geng ◽  
Liaoliao Zhao ◽  
Mengmeng Wang ◽  
Ho Wing-Kei
Keyword(s):  
Photocatalytic Activity ◽  
Synergistic Effect ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Competitive Adsorption ◽  
Light Irradiation ◽  
No Removal

Graphite carbon nitride (g-C3N4) has been proven to have photocatalytic activity for NO-removal under visible-light irradiation. However, the competitive adsorption between NO and O2 during the process may decrease the...

scholarly journals Photocatalytic NO removal over calcium-bridged siloxenes under ultraviolet and visible light irradiation

2018 ◽  
Vol 47 (20) ◽  
pp. 7070-7076 ◽  
Author(s):  
Haruo Imagawa ◽  
Xiaoyong Wu ◽  
Hiroshi Itahara ◽  
Shu Yin ◽  
Kazunobu Kojima ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Absorption Band ◽  
Optical Absorption ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
Ultraviolet Region ◽  
No Removal ◽  
Optical Absorption Band

Ca-Bridged siloxenes with a wide optical absorption band from the visible to ultraviolet region exhibited photocatalytic activity for NO removal.

scholarly journals Ce-Doped Graphitic Carbon Nitride Derived from Metal Organic Frameworks as a Visible Light-Responsive Photocatalyst for H2 Production

Nanomaterials ◽  
2019 ◽  
Vol 9 (11) ◽  
pp. 1539 ◽  
Author(s):  
Liangjing Zhang ◽  
Zhengyuan Jin ◽  
Shaolong Huang ◽  
Yiyue Zhang ◽  
Mei Zhang ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Metal Organic Frameworks ◽  
Graphitic Carbon ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Enhanced Absorption ◽  
Metal Organic

Novel fibrous graphitic carbon nitride (g-C3N4) derivatives prepared from metal organic frameworks (MOFs) were doped with Ce3+ (Ce-C3N4) as photocatalytic materials. Ce-C3N4 was characterized using various techniques, revealing its high specific surface area, excellent photocatalytic activity, and stability for H2 evolution under visible light irradiation. The fluorine modified samples show superior photocatalytic activity under visible light irradiation, which is due to the presence of more active sites and enhanced absorption of solar energy. This work provides a new synthetic route for MOF-derived g-C3N4 that can be doped with different metal ions. The fluorine modified Ce-C3N4 is an efficient photocatalyst with potential for many applications related to energy and the environment.

Porous and low-defected graphitic carbon nitride nanotubes for efficient hydrogen evolution under visible light irradiation

RSC Advances ◽  
2015 ◽  
Vol 5 (124) ◽  
pp. 102700-102706 ◽  
Author(s):  
Zhijun Huang ◽  
Fengbo Li ◽  
Bingfeng Chen ◽  
Guoqing Yuan
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Electronic Properties ◽  
Hydrogen Evolution ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Light Irradiation ◽  
Graphitic Carbon Nitride ◽  
Optical And Electronic Properties

Porous and low-defected g-C3N4 nanotubes with high SBET and optimized optical and electronic properties exhibit enhanced photocatalytic activity.

A Comparative Study on the Role of Precursors of Graphitic Carbon Nitrides for the Photocatalytic Degradation of Direct Red 81

2014 ◽  
Vol 807 ◽  
pp. 101-113 ◽  
Author(s):  
J. Theerthagiri ◽  
R.A. Senthil ◽  
J. Madhavan ◽  
B. Neppolian
Keyword(s):  
Particle Size ◽  
Photocatalytic Activity ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Visible Light Irradiation ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carbon Nitrides

The graphitic carbon nitride (g-C3N4) materials have been synthesized from nitrogen rich precursors such as urea and thiourea by directly heating at 520 °C for 2 h. The as-synthesized carbon nitride samples were characterized by x-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible (UV-vis) absorption spectroscopy, photoluminescence (PL) and particle size analysis. The photoelectrochemical measurements were performed using several on-off cycles under visible-light irradiation. The x-ray diffraction peak is broader which indicates the fine powder nature of the synthesized materials. The estimated crystallite size of carbon nitrides synthesized from urea (U-CN) and thiourea (T-CN) are 4.0 and 4.4 nm respectively. The particle size of U-CN and T-CN were analysed by particle size analyser and were found to be 57.3 and 273.3 nm respectively. The photocatalytic activity for the degradation of the textile dye namely, direct red-81 (DR81) using these carbon nitrides were carried out under visible light irradiation. In the present investigation, a comparison study on the carbon nitrides synthesized from cheap precursors such as urea and thiourea for the degradation of DR81 has been carried out. The results inferred that U-CN exhibited higher photocatalytic activity than T-CN. The photoelectrochemical studies confirmed that the (e--h+) charge carrier separation is more efficient in U-CN than that of T-CN and therefore showed high photocatalytic degradation. Further, the smaller particle size of U-CN is also responsible for the observed degradation trend.

scholarly journals Photocatalytic removal of cyclohexane on visible light-driven gallium oxide/carbon nitride composites prepared by impregnation method

2015 ◽  
Vol 11 (3) ◽  
Author(s):  
Shu Chin Lee ◽  
Wee Shern Chew ◽  
Hendrik O. Lintang ◽  
Leny Yuliati
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Gallium Oxide ◽  
Carbon Nitride ◽  
Light Irradiation ◽  
Impregnation Method ◽  
Visible Light Absorption ◽  
Photocatalytic Removal ◽  
Visible Light Driven

Carbon nitride is a material of interest for photocatalytic reactions due to its catalytic and visible light absorption properties. However, the photocatalytic activity is still low. Hence, modifications must be carried out to improve the photocatalytic activity of carbon nitride. In this work, a series of gallium oxide/carbon nitride composites with various gallium to carbon ratios (Ga/C = 1-50 mol%) was prepared by impregnation method for removal of cyclohexane under visible light irradiation for the first time. The successful preparation of gallium oxide/carbon nitride composites was supported by several characterization techniques. X-ray diffraction (XRD) patterns and diffuse reflectance UV-visible (DR UV-vis) spectra revealed that the increased Ga/C ratio resulted in the increased formation of Ga2O3. Furthermore, all the prepared composite samples also showed visible light absorption up to about 430 nm. In the photocatalytic removal of cyclohexane under 6 h of visible light irradiation, sample with low loading of 1 mol% Ga/C improved the photocatalytic activity of carbon nitride for two times. The high activity obtained on the gallium oxide (1 mol%)/carbon nitride composite clearly suggested the presence of synergic effect between small amount of gallium oxide and carbon nitride when they were combined. This study showed that a visible light-driven gallium oxide/carbon nitride composite could be prepared by impregnating a small amount of gallium oxide on carbon nitride and the composite is a potential photocatalyst for removal of cyclohexane under visible light irradiation.  

scholarly journals Synthesis, characterization and photocatalytic activity of WO3/TiO2 for NO removal under UV and visible light irradiation

2014 ◽  
Vol 148 (1-2) ◽  
pp. 208-213 ◽  
Author(s):  
E. Luévano-Hipólito ◽  
A. Martínez-de la Cruz ◽  
E. López-Cuellar ◽  
Q.L. Yu ◽  
H.J.H. Brouwers
Keyword(s):  
Photocatalytic Activity ◽  
Visible Light ◽  
Visible Light Irradiation ◽  
Light Irradiation ◽  
No Removal
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