Development of direct Z-schemes 2D/2D Bi2O2CO3/ SrTiO3 photocatalyst with interfacial interaction for photocatalytic CO2 reduction

•The Bi2O2CO3/SrTiO3 heterostructure is synthesized by a simple hydrothermal method.•The Bi2O2CO3/SrTiO3 heterostructure has ideal channels for charge transport due to crystal facet matching.•Direct Z-schemes for Bi2O2CO3/SrTiO3 can facilitate efficient migration and separation of photogenerated carriers.•A higher adsorption energy of CHOO– and CO for Bi2O2CO3/SrTiO3 make an excellent performance.