Effective SrWO /TiO Heterojunction with Enhanced Carriers Separation and Transfer for Photocatalytic Methane Oxidation.

Photocatalytic methane oxidation to oxygenates with promising performance remains as a grand challenge due to the low productivity and severe overoxidation. Herein, SrWO /TiO heterojunction was developed for photocatalytic methane oxidation with O to liquid oxygenates ( Please replace "oxygenates" with "oxygenated")products under mild reaction conditions. The optimized SrWO /TiO catalyst exhibited high productivity of 13365 μmol/g with high selectivity of 98.7 % for oxygenates. Benefited from the intimate heterojunction interface of SrWO /TiO , the constructed I-type heterostructure improved the separation and transfer of photogenerated carriers, and a high-speed transfer channel for photogenerated carriers was fabricated. Simultaneously, the special band structure can increase the amount of photogenerated electrons and holes on the TiO surface, which promoted the formation of reactive oxygen species to enhance liquid oxygenates productivity.