The article discusses the advancements in photocatalytic hydrogen (H2) generation through the use of heterojunction materials. It emphasizes the importance of sustainable and clean energy sources due to environmental concerns and the depletion of fossil fuels. Photocatalytic water splitting using semiconductor materials, specifically heterojunction photocatalysts, has gained attention for effectively harnessing solar energy. The article highlights the unique attributes of carbon (C) and nitrogen (N)-based materials, particularly g-C3N4, in enhancing photocatalytic activity. By forming heterojunctions with different semiconductors, g-C3N4 can significantly improve the efficiency of H2 generation by enhancing light absorption and charge separation. The article also explores the benefits of Metal-Organic Frameworks (MOFs) and Covalent Organic Frameworks (COFs) in optimizing interfacial charge transport in heterojunction systems. Additionally, the synergistic effects of combining g-C3N4 with COFs and Ti3C2 MXene are highlighted for their role in improving light absorption, charge separation, and catalytic activity. The development of Ti3C2 MXene as a promising candidate for constructing heterojunctions with g-C3N4 is seen as a significant step towards enhancing photocatalytic efficiency for H2 generation. Overall, the article showcases the potential of heterojunction materials in advancing photocatalytic H2 production for renewable energy applications.