Effect of the Preparation Method on Cu-MOR/g-C3N4 for Direct Methanol Synthesis from Methane Oxidation by Photothermal Catalysis

Copper-based zeolite catalysts are widely used in methanol synthesis from methane oxidation, but their photothermal catalytic properties have seldom been explored. This study examines the effect of preparation method on Cu-based composite graphite-phase carbon nitride (Cu-MOR/g-C3N4) for direct oxidation by catalysis. Four different methods employed: liquid phase ion exchange (Cu-MOR/g-C3N4-IE), isovolumetric impregnation (Cu-MOR/g-C3N4-IM), solid-state (Cu-MOR/g-C3N4-GR), and hydrothermal (Cu-MOR/g-C3N4-HT). Cu-MOR/g-C3N4-IE shows highest yield (3.09 μmol h−1 gcat−1) due to strong interactions between CuxOy species g-C3N4, as well smaller interfacial charge transfer forces. provides a new design conversion methane.