Effect of Glucose-Induced Hydrogen Bonding of Precursors on the Structural and Catalytic Properties of g-C3N4-Based Composites

To investigate the effect of hydrogen bonding interactions between precursors on the structure and performance of the target catalysts. The dicyanodiamine/glucose (DCDA/GLC) precursors with hydrogen bonding interactions were prepared by a simple hydrothermal method, and g-C3N4-based (GCN-X) composite photocatalysts were further prepared by subsequent thermal polymerization. Through the analysis of thermal decomposition kinetics and structural characterization, the relative enhancement of the strength of hydrogen bonding interactions in the structure of the DCDA/GLC-2 precursor could effectively promote the transformation process of dicyandiamine to melamine. Glucose in the precursor, which formed a part of monolithic carbon, was attached to the surface of g-C3N4. The ultimately obatained GCN-2 possessed a stronger visible-light absorption ability, better conductivity and charge transfer efficiency. Thus, GCN-2 exhibits better photocatalytic activity.