  In recent years, conjugated polymers such as graphitic Carbon Nitride
(g-C3N4) attracts major attention to the researchers for the harnessing of
renewable energy and environmental remediation through photocatalytic water
splitting. Its moderate electronic band gap structure helps to absorb large
spectrum of abundant solar radiation for the generation of hydrogen, a high
density chemical energy source, by water splitting method. Its outstanding
physicochemical stability makes it a reliable energy conversion material.
Another key attribute to the researchers is the simple way of synthesizing
pristine g-C3N4 and its nanocomposite structures modified with metallic and
non-metallic materials. g-C3N4 can be synthesized in both chemical and physical
process. In this work, the superiority in structural, optical and
photocatalytic property observed in physically developed g-C3N4 over chemically
synthesized g-C3N4 has been discussed and based on such studies, a suitable
synthesis method has been proposed.
