Photocatalysis is a green chemical process that could partly solve energy and pollution issues. Catalysts such as cobalt titanate, CoTiO₃, have intrigued scientists due to a visible light-responsive band gap of about 2.3 eV and a high valance band potential of about 2.35 eV that allow a remarkable oxidative activity. Nonetheless, CoTiO₃ photocatalytic activity is limited by charge recombination, thus requiring modifications. For instance, the introduction of a second semiconductor allows improved charge separation and notable enhancement of the activity. Here we review interfacial engineering of CoTiO₃ by introduction of a second semiconductor. We describe the synthesis and photocatalytic applications of bare and modified CoTiO₃. Modified CoTiO₃ composites are categorized into Type-I, Type-II, Z-scheme, and S-scheme heterojunctions, depending on the band structures of the composite.

光催化是一种绿色化学过程，可以部分解决能源和污染问题。诸如钛酸钴、CoTiO ₃等催化剂由于具有约 2.3 eV 的可见光响应带隙和约 2.35 eV 的高价带电位而引起了科学家的极大兴趣，从而具有显着的氧化活性。尽管如此，CoTiO ₃光催化活性受到电荷复合的限制，因此需要进行修改。例如，引入第二种半导体可以改善电荷分离并显着提高活性。在这里，我们通过引入第二种半导体来回顾 CoTiO _{3的界面工程。}我们描述了裸和改性 CoTiO _{3的合成和光催化应用}. 改性CoTiO ₃复合材料根据复合材料的能带结构分为I型、II型、Z型和S型异质结。