Nanostructured TiO₂ is often used for photocatalytic CO₂ conversion due to its favorable electronic properties and stability, being coupled with large surface area and unique electrical properties. However, pure TiO₂, without any expensive cocatalysts, can not provide highly efficient CO₂ conversion because its bandgap and resulted limited numbers of photogenerated electrons and holes limit efficient energy conversion. Here, we demonstrate TiO₂ nanotube (TNT) photocatalysts equipped with two different perovskite quantum dots (PQDs) made of CH₃NH₃PbBr₃ and CH₃NH₃PbI₃. The fundamental properties of the PQDs and TNT/PQD photocatalysts are investigated and their potential for more efficient CO₂ conversion are discussed, to our best knowledge, for the first time. TNT/CH₃NH₃PbI₃ QD photocatalysts absorb a wider range of light energy and show superior charge transport characteristics due to less sensitivity against surface states at TNT/CH₃NH₃PbI₃ QD interface than the TNT/CH₃NH₃PbBr₃ photocatalysts.

纳米结构的TiO ₂由于其良好的电子特性和稳定性，加上大的表面积和独特的电特性，经常用于光催化CO ₂转化。然而，没有任何昂贵助催化剂的纯 TiO ₂不能提供高效的 CO ₂转化，因为它的带隙和产生的有限数量的光生电子和空穴限制了有效的能量转化。这里，我们证明的TiO ₂纳米管（TNT）配备有两个不同的钙钛矿型量子点（PQDs）由CH的光催化剂₃ NH ₃ PbBr ₃和CH ₃ NH ₃碘化铅₃. 据我们所知，研究了 PQD 和 TNT/PQD 光催化剂的基本特性，并首次讨论了它们在更有效的 CO ₂转化方面的潜力。TNT / CH ₃ NH ₃碘化铅_3个QD光催化剂吸收更宽范围的光的能量，并显示优异的电荷传输特性由于在TNT / CH针对表面态少灵敏度₃ NH ₃碘化铅₃ QD接口比TNT / CH ₃ NH ₃ PbBr ₃光触媒。