A new check-patterned CuSx–TiO2 film was prepared by the squeeze printing method.
Significantly increased amounts of CO2 were adsorbed on the CuSx–TiO2 film.
High amounts of CH4 (53.2 μmolgcat−1 L−1) were produced over the CuSx–TiO2 film.
An electron-rich pool was supposedly formed at the boundary between TiO2 and CuSx.