Dear friend Anand Narani

The functional groups that are responsible for the basicity of biomass-derived carbon supports are primarily nitrogen-containing groups, such as pyridinic, pyrrolic, and graphitic nitrogen. These nitrogen-containing groups can act as Lewis bases and can readily donate electrons to acids, making the carbon support basic. Other functional groups that may contribute to basicity include oxygen-containing groups, such as carboxylic and phenolic groups, as well as sulfur-containing groups.

Here are a few articles that discuss the basicity of biomass-derived carbon supports:

These articles provide a detailed analysis of the basicity of biomass-derived carbon supports and the specific functional groups responsible for their basic properties.

I hope this will be good start.