Photocatalytic properties of CuO/(001)‐TiO ₂ composites synthesized by the vapor–thermal method

Composites of (001)‐face‐exposed TiO 2 ((001)‐TiO 2 ) and CuO were synthesized in water vapor environment at 250°C with various Cu/Ti molar ratios ( R Cu/Ti ). The resulting CuO/(001)‐TiO 2 composites were characterized using a variety of techniques. The synthesis under high‐temperature vapor allows close contact between CuO and (001)‐TiO 2 , which results in the formation of heterojunctions, as evidenced by the shift of valence band maximum...