Development of an efficient photocatalyst for the water splitting to fulfill the increasing energy demands of world and degradation of organic pollutant in water especially methylene blue to make it safe for aquatic life is a great challenge. In this reported article, an efficient and novel photocatalyst TiO₂/Al₂O₃@Cu(BDC) has been synthesized by in situ incorporation of pre-synthesized precursors into Cu(BDC). It shows maximum activity towards water splitting for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). Similarly, it shows maximum activity for photodegradation of methylene blue as compared to all other synthesized samples. Results showed that this novel TiO₂/Al₂O₃@Cu(BDC) composite exhibits increase charge separation and better photocatalytic activity as compared to precursors. It is observed that maximum photocatalytic activity of TiO₂/Al₂O₃@Cu(BDC) is mainly due to successful formation of hetro-junction between TiO₂/Al₂O₃ and Cu(BDC) and reduce of electron-hole pair recombination. Under irradiation of visible light, photoexcited electrons are transferred from conduction band of Cu(BDC) to conduction band of TiO₂/Al₂O₃ and further these photoexcited electrons form the O2^•− and •OH radicals at surface of photocatalyst, which directly degrade the methylene blue. On the other side at valance band of Cu(BDC), positive hole (h⁺) forms the •OH radicals and degraded the methylene blue. This study encourages the development of more efficient MOFs based photocatalyst and used in photocatalytic applications.

为了满足世界日益增长的能源需求以及使水中的有机污染物（尤其是亚甲蓝）降解以使其对水生生物安全的要求，开发一种用于水分解的高效光催化剂是一项巨大的挑战。在这篇报道的文章中，通过将预先合成的前体原位掺入Cu（BDC）中，合成了一种高效且新颖的TiO ₂ / Al ₂ O ₃ @Cu（BDC）。对于氢气分解反应（HER）和氧气分解反应（OER），它均显示出最大的分解水活性。同样，与所有其他合成样品相比，它显示出最大的亚甲基蓝光降解活性。结果表明，该新型TiO ₂ / Al ₂ O与前体相比，₃ @Cu（BDC）复合材料表现出增加的电荷分离和更好的光催化活性。观察到TiO ₂ / Al ₂ O ₃ @Cu（BDC）的最大光催化活性主要是由于TiO ₂ / Al ₂ O ₃与Cu（BDC）之间成功形成了异质结并减少了电子-空穴对重组。在可见光的照射下，光激发电子从Cu（BDC）的导带转移到TiO ₂ / Al ₂ O _3的导带，进而这些光激发电子形成O2 ^•-光催化剂表面的•OH自由基可直接降解亚甲基蓝。在Cu（BDC）价带的另一侧，正空穴（h ⁺）形成•OH自由基并降解了亚甲基蓝。这项研究鼓励开发更有效的基于MOF的光催化剂，并将其用于光催化应用中。