Cu doped SrTiO₃ (Cu-STO) has been synthesized and investigated as the photocatalyst for selective alcohol oxidation under mild condition. Cu-STO samples demonstrate intense absorption to visible light and near-infrared light. Using water as the reaction solvent, Cu-STO samples can efficiently oxidize benzyl alcohol (BA) into benzyl aldehyde under both anaerobic and aerobic conditions with high selectivity. In aerobic condition, an apparent quantum efficiency as high as 43.22% at 420 nm has been reached for benzyl alcohol oxidation. More strikingly, the apparent quantum efficiency remains as high as 14.47% even at 700 nm, being the highest one reported to date under similar conditions. Further analysis indicates Cu dopants induces abundant oxygen vacancies and introduces interband springboard into SrTiO₃, which effectively extend the light response of SrTiO₃ to the visible and NIR region and enhance the separation of charge carriers, being critical to the highly selective and efficient conversion of alcohols.

合成了Cu掺杂的SrTiO ₃（Cu-STO），并作为温和条件下选择性醇氧化的光催化剂进行了研究。Cu-STO样品显示出对可见光和近红外光的强烈吸收。使用水作为反应溶剂，Cu-STO样品可以在厌氧和需氧条件下高效地将苄醇（BA）氧化为苄基醛。在有氧条件下，苄醇氧化的表观量子效率在420 nm时高达43.22％。更惊人的是，即使在700 nm处，表观量子效率仍然高达14.47％，是迄今为止在类似条件下报道的最高效率。进一步的分析表明，Cu掺杂剂会引起大量的氧空位，并将带间跳板引入SrTiO_{如图3所示}，其有效地将SrTiO ₃的光响应扩展到可见光和NIR区域并增强电荷载流子的分离，这对于醇的高度选择性和有效转化至关重要。