Graphitic carbon nitride

Open access peer-reviewed chapter. Edited by Nasser S.

The semiconductors, such as TiO 2 , CdS, ZnO, BiVO 4 , graphene, produce good applications in photocatalytic water splitting for hydrogen production, and great progress have been made in the synthesis and modification of the materials. As a two-dimensional layered structure material, graphitic carbon nitride g-C 3 N 4 , with the unique properties of high thermostability and chemical inertness, excellent semiconductive ability, affords good potential in photocatalytic hydrogen evolution. However, the related low efficiency of g-C 3 N 4 with fast recombination rate of photogenerated charge carriers, limited visible-light absorption, and low surface area of prepared bulk g-C 3 N 4 , has called out the challenge issues to synthesize and modify novel g-C 3 N 4 -block photocatalyst. In this review, we have summarized several strategies to improve the photocatalytic performance of pristine g-C 3 N 4 such as pH, morphology control, doping with metal or non-metal elements, metal deposition, constructing a heterojunction or homojunction, dye-sensitization, and so forth. The performances for photocatalytic hydrogen evolution and possible development of g-C 3 N 4 materials are shared with the researchers interested in the relevant fields hereinto. With the development and progress of human society, environmental pollution and energy shortage have become two major problems that plague human beings. Hydrogen is considered as one of the best candidates for storing solar energy meeting the growing clean energy demand Chen et al.

Graphitic carbon nitride

Carbon nitride , also known as graphitic carbon nitride g-C3N4 , is a two-dimensional material composed of carbon and nitrogen atoms that are arranged in a hexagonal lattice structure, similar to graphene. Carbon nitride is relatively stable, lightweight, and has a high surface area , making it an excellent candidate for catalysis. It has a bandgap of around 2. Due to its high stability and ability to absorb visible light, carbon nitride has been extensively studied for its photocatalytic properties. As the Nanografi, we supply Graphitic Carbon Nitride with high quantities and more types for different applications and requirements. Popular Brands Micronkote View All. Recent Posts. In the realm of rechargeable batteries, lithium-ion technology stands out for its efficiency, high …. In the field of automotive innovation, the ongoing battle against corrosion is a significant challen …. In the ever-evolving landscape of energy storage, the pursuit of novel and sustainable solutions has …. Rating Required Select Rating 1 star worst 2 stars 3 stars average 4 stars 5 stars best. Review Subject Required. Comments Required. Current Stock:.

Other decorative components introduced throughout the construction process can also be used. Under light irradiation, electron-hole pairs were generated on the surface of g-C 3 N 4 photocatalyst to provide the reaction sites. Qi, Y.

Graphitic carbon nitride g-C 3 N 4 is a family of carbon nitride compounds with a general formula near to C 3 N 4 albeit typically with non-zero amounts of hydrogen and two major substructures based on heptazine and poly triazine imide units which, depending on reaction conditions, exhibit different degrees of condensation , properties and reactivities. Graphitic carbon nitride can be made by polymerization of cyanamide , dicyandiamide or melamine. The firstly formed polymeric C 3 N 4 structure, melon , with pendant amino groups , is a highly ordered polymer. Further reaction leads to more condensed and less defective C 3 N 4 species, based on tri-s-triazine C 6 N 7 units as elementary building blocks. Alumina favored the deposition of the graphitic carbon nitrides layers on the exposed surface.

In organic chemistry , carbon nitrides are compounds consisting only of carbon and nitrogen atoms. Carbon nitrides are also known as organic semiconductors with a band gap of 2. Due to its hydrogen-bonding motifs and electron-rich properties, this carbon material is considered a potential candidate for material applications in carbon supplementation. Dicyanopolyynes are composed of a chain of carbon atoms with alternating single and triple bonds, terminated by nitrogen atoms. Contents move to sidebar hide. Article Talk. Read Edit View history. Tools Tools.

Graphitic carbon nitride

Federal government websites often end in. The site is secure. Graphitic carbon nitride g-C 3 N 4 is a two-dimensional conjugated polymer that has attracted the interest of researchers and industrial communities owing to its outstanding analytical merits such as low-cost synthesis, high stability, unique electronic properties, catalytic ability, high quantum yield, nontoxicity, metal-free, low bandgap energy, and electron-rich properties. Notably, graphitic carbon nitride g-C 3 N 4 is the most stable allotrope of carbon nitrides.

Nagito sprites

Hydrogen Energy 44 8 , — Nature , A , , 5 , DOI: J Mater Chem A 2 9 — Niu and his group [ 72 ] achieved the g-C 3 N 4 on silicon substrate by using pulse laser evaporation C target, auxiliary deposition of atom nitrogen. First published 14 Oct Min, S. Nanoscale 9 9 — From the recent study, what scientists frequently get are mixture films which comprise several crystal phases. J Synth Cryst 32 3 — Reproduced from [ 60 ].

Graphite carbon nitride g-C 3 N 4 is well known as one of the most promising materials for photocatalytic activities, such as CO 2 reduction and water splitting, and environmental remediation through the removal of organic pollutants.

The oxide may transfer its electron Fig. Metal Ni-loaded g-C 3 N 4 for enhanced photocatalytic H 2 evolution activity: The change in surface band bending. Successively, thermal condensation method, which mostly consists of conjugated aromatic heptazine system with graphitic assembling characteristics, has been used several moments to prepare g-C 3 N 4 [ 36 ]. The use of solvothermal technique for g-C 3 N 4 synthesis has great remunerations such as even and fine particle formation, little energy consumption, and higher economic feasibility as compared to the outdated thermal condensation method. Microwave radiation, regarding to heat solvothermally pressurized and closed reaction system, the reactants can be reacted and transformed into products far more swiftly than using the conventional method. Angew Chem Int Ed — At the temperatures given, no residual component of precursors could be established. AlCl 3 boosted the standard version. Yu, L. The number of admirable researches and reviews on g-C 3 N 4 structure and preparation in the last few years has increased tremendously [ 10 ]. ACS Catalysis. Sorry, a shareable link is not currently available for this article. This paper demonstrates a straightforward and practical method for synthesizing high-performance metal-free g-C 3 N 4 photo-catalysts by altering the electronic transition via a well-designed band structure Figure 5.