Graphitic Carbon Nitride Nanomaterials for Multicolor Light-Emitting Diodes and Bioimaging

2020 ◽  
Vol 3 (7) ◽  
pp. 6798-6805
Author(s):  
Huijun Zhang ◽  
Daiwei Zheng ◽  
Zhuang Cai ◽  
Zhiping Song ◽  
Yuanteng Xu ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Light Emitting Diodes ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Light Emitting

Naphthyl-modified graphitic carbon nitride: Preparation and application in light-emitting diodes

2022 ◽  
pp. 118734
Author(s):  
Huaijun Tang ◽  
Qiuhong Chen ◽  
Shiyou Lu ◽  
Xianghua Li ◽  
Haoju Li ◽  
...  
Keyword(s):  
Carbon Nitride ◽  
Light Emitting Diodes ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Light Emitting

scholarly journals Analysis of Photocatalytic Degradation of Phenol with Exfoliated Graphitic Carbon Nitride and Light-Emitting Diodes Using Response Surface Methodology

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 898
Author(s):  
Adeem Ghaffar Rana ◽  
Mirjana Minceva
Keyword(s):  
Response Surface Methodology ◽  
Photocatalytic Degradation ◽  
Response Surface ◽  
Carbon Nitride ◽  
Light Emitting Diodes ◽  
Catalyst Concentration ◽  
Phenol Degradation ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Light Emitting

Response surface methodology (RSM) involving a Box–Benkhen design (BBD) was employed to analyze the photocatalytic degradation of phenol using exfoliated graphitic carbon nitride (g-C3N4) and light-emitting diodes (wavelength = 430 nm). The interaction between three parameters, namely, catalyst concentration (0.25–0.75 g/L), pollutant concentration (20–100 ppm), and pH of the solution (3–10), was examined and modeled. An empirical regression quadratic model was developed to relate the phenol degradation efficiency with these three parameters. Analysis of variance (ANOVA) was then applied to examine the significance of the model; this showed that the model is significant with an insignificant lack of fit and an R2 of 0.96. The statistical analysis demonstrated that, in the studied range, phenol concentration considerably affected phenol degradation. The RSM model shows a significant correlation between predicted and experimental values of photocatalytic degradation of phenol. The model’s accuracy was tested for 50 ppm of phenol under optimal conditions involving a catalyst concentration of 0.4 g/L catalysts and a solution pH of 6.5. The model predicted a degradation efficiency of 88.62%, whereas the experimentally achieved efficiency was 83.75%.

scholarly journals Efficient Advanced Oxidation Process (AOP) for Photocatalytic Contaminant Degradation Using Exfoliated Metal-Free Graphitic Carbon Nitride and Visible Light-Emitting Diodes

Catalysts ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 662
Author(s):  
Adeem Ghaffar Rana ◽  
Minoo Tasbihi ◽  
Michael Schwarze ◽  
Mirjana Minceva
Keyword(s):  
Visible Light ◽  
Carbon Nitride ◽  
Photocatalytic Performance ◽  
Light Emitting Diodes ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Light Emitting ◽  
X Ray ◽  
Metal Free ◽  
Custom Made

The photocatalytic performance of metal-free graphitic carbon nitride (g-C3N4) was examined using visible light-emitting diodes (LEDs). A comparative and parametric study was conducted using the photocatalytic degradation of phenol as a model reaction. The g-C3N4 photocatalyst was synthesized from melamine using thermal condensation, followed by a thermal exfoliation that increases the catalyst surface area from 11 to 170 m2/g. Different characterization techniques, namely X-ray powder diffraction, X-ray photoelectron spectroscopy, nitrogen adsorption using the Brunauer–Emmett–Teller method, ultraviolet-visible (UV–vis) spectroscopy, transmission electron microscopy, photoluminescence spectroscopy (PL), and zeta potential analysis, were used to characterize the photocatalyst. A comparison of the photodegradation experiments conducted with a full-spectrum xenon lamp and a custom-made single-wavelength LED immersion lamp showed that the photocatalyst performance was better with the LED immersion lamp. Furthermore, a comparison of the performance of exfoliated and bulk g-C3N4 revealed that exfoliated g-C3N4 completely degraded the pollutant in 90 min, whereas only 25% was degraded with bulk g-C3N4 in 180 min because the exfoliated g-C3N4 enhances the availability of active sites, which promotes the degradation of phenol. Experiments conducted at different pH have shown that acidic pH favors the degradation process. The exfoliated g-C3N4 has shown high photocatalytic performance in the photodegradation of other phenolic compounds, such as catechol, m-cresol, and xylenol, as well.

A [Fe(bpy)3]2+ grafted graphitic carbon nitride hybrid for visible light assisted oxidative coupling of benzylamines under mild reaction conditions

2016 ◽  
Vol 18 (8) ◽  
pp. 2514-2521 ◽  
Author(s):  
Arvind Kumar ◽  
Pawan Kumar ◽  
Chetan Joshi ◽  
Srikanth Ponnada ◽  
Abhishek K. Pathak ◽  
...  
Keyword(s):  
Visible Light ◽  
Molecular Oxygen ◽  
Oxidative Coupling ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
White Led ◽  
Reaction Conditions ◽  
Light Emitting

Iron(ii) bipyridine grafted on graphitic carbon nitride (Fe(bpy)3/npg-C3N4) was found to be an efficient photocatalyst for oxidative coupling of benzyl amines using molecular oxygen as an oxidant and a household white LED as a light emitting source.

Metal Doped-C3N4/Fe2O4: Efficient and Versatile Heterogenous Catalysts for Organic Transformations

2019 ◽  
Vol 23 (12) ◽  
pp. 1284-1306
Author(s):  
Vijai K. Rai ◽  
Fooleswar Verma ◽  
Suhasini Mahata ◽  
Smita R. Bhardiya ◽  
Manorama Singh ◽  
...  
Keyword(s):  
Ring Opening ◽  
Carbon Nitride ◽  
Addition Reaction ◽  
High Surface ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Organic Transformations ◽  
Reduction Reactions ◽  
Activation Reaction ◽  
Metal Doped

The polymeric graphitic carbon nitride (g-C3N4) has been one of the interesting earth abundant elements. Though g-C3N4 finds application as a photocatalyst, its photocatalytic behaviour is limited because of low efficiency, mainly due to rapid charge recombination. To overcome this problem, several strategies have been developed including doping of metal/non-metal in the cavity of g-C3N4. Moreover, the CoFe2O4 NPs have been used in many organic transformations because of its high surface area and easy separation due to its magnetic nature. This review describes the role of cobalt ferrite as magnetic nanoparticles and metal-doped carbon nitride as efficient heterogeneous catalysts for new carbon-carbon and carbon-hetero atom bond formation followed by heterocyclization. Reactions which involved new catalysts for selective activation of readily available substrates has been reported herein. Since nanoparticles enhance the reactivity of catalyst due to higher catalytic area, they have been employed in various reactions such as addition reaction, C-H activation reaction, coupling reaction, cyclo-addition reaction, multi-component reaction, ring-opening reaction, oxidation reaction and reduction reactions etc. The driving force for choosing this topic is based-on huge number of good publications including different types of spinels/metal doped-/graphitic carbon nitride reported in the literature and due to interest of synthetic community in recent years. This review certainly will represent the present status in organic transformation and for exploring further their catalytic efficiency to new organic transformations involving C-H activation reaction through coupling, cyclo-addition, multi-component, ring-opening, oxidation and reduction reactions.

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