Abstract
Here we delicately design CoO/Co(3)O(4) heterostructures via a one-step solvothermal process for photocatalytic CO(2) reduction. The intimate-contact heterojunction, in synergy with oxygen vacancies, direct the spatial separation of photogenerated charges and provide active reaction platforms, thus endowing CoO/Co(3)O(4) with enhanced CO(2)-to-CO conversion performance.