Carbon monoxide is used in HiPCo and CoMoCAT process for manufacturing SWNTs. Other than these processes are there any other processes are available where CO is used for manufacturing of carbon materials.
This reference on graphene synthesis? DOI 10.1016/j.carbon.2017.01.044.It's worth simply searching via Web of science, Scopus etc using (for example) graphene and carbon monoxide together in your search terms, then repeat for another carbon nano material (carbon black, amorphous carbon, carbon foams etc)