Sunergy in catalysis primarily involves the use of photocatalysts, which are materials capable of absorbing sunlight and using this energy to accelerate chemical reactions. These photocatalysts can be semiconductor materials like titanium dioxide (TiO2), zinc oxide (ZnO), or advanced materials like metal-organic frameworks (MOFs). When these photocatalysts absorb sunlight, they generate electron-hole pairs, which can interact with reactants to produce desired chemical products.