Emilia Alwin

Emilia Alwin

University in Poznan, Poland
Spongy Carbon Nitride (Sg-C3n4) as the Adsorbent of Organic Dyes
Abstract:

Carbon nitride is an organic polymer of the chemical formula of C3N4. Its structure closely resembles that of the layered structure of graphite, so it is called a graphitic carbon nitride and is denoted as g-C3N4. Due to the high nitrogen content, carbon nitride has high chemical and thermal resistance. Thanks to this, it is used as a support in catalysis. It is for this purpose that we used carbon nitride in our research.

Carbon nitride was doped by nickel and then was reduced at 525°C. Surprisingly, it was noted that the reduction at high temperature leads to a increase in the specific surface area of the catalyst, up to 380 m2g-1. Moreover, during the reduction process, significant amounts of gases (like NH3, CH4, HCN) are released. It indicates that the evolution of gases causes more porosity of the structure.

One of the problems of the 21st century is the growing pollution of the environment. One of them is the pollution of waters with organic compounds that can be removed in sorption processes. This is where the obtained material was used. However, for better results, the metal was washed out of the system. The developed specific surface of carbon nitride was used in sorption processes of organic dyes, like rhodamine B and methyl orange. For example, the maximum sorption od RhB is close to 200 mg g-1.