Hetero-structured semiconductor composite as an ideal multifunctional photocatalyst has significant advantage for the improvement of photocatalytic efficiency. Here, core–shell hetero-structured α-Fe₂O₃@Carbon (α-Fe₂O₃@C) composite including of α-Fe₂O₃ nanoparticles (NPs) inner-core and amorphous carbon outer-shell was successfully synthesized via a simple hydrothermal method. The experiment results indicate that the present core–shell structure has a remarkable impact on the interfacial synergies. The possible photocatalytic mechanism of core–shell α-Fe₂O₃@C composite is investigated in detail. Thanks to the following advantages: the core–shell structure provides more heterogeneous interfaces, so the incident light would be reflected multiply and enhanced the light absorption capacity. In addition, the heterogeneous interface synergistic effect between amorphous carbon and α-Fe₂O₃ as the bridge gives rise to a rapid approach to transport photo-induced carriers and thus enhances the electronic transfer capacity. It is anticipated that the core–shell nanostructure provides a neoteric mentality for designing superior photocatalysts with outstanding advantageous features applicable to, among others, hydrogen generation, green energy, water splitting, etc.

异质结构半导体复合材料作为理想的多功能光催化剂，对于提高光催化效率具有显着优势。在这里，包括α-Fe ₂ O ₃纳米颗粒（NPs）内核和无定形碳外壳的核壳异质结构α-Fe ₂ O ₃ @Carbon（α-Fe ₂ O ₃ @C）复合材料成功采用简单的水热法合成。实验结果表明，目前的核壳结构对界面协同作用有显着影响。核壳α-Fe ₂ O _{3的可能光催化机理}详细研究@C 复合材料。由于以下优点：核壳结构提供了更多的异质界面，因此入射光会被多次反射并增强光吸收能力。此外，无定形碳和α-Fe ₂ O ₃作为桥之间的异质界面协同效应产生了一种快速传输光致载流子的方法，从而提高了电子传输能力。预计核壳纳米结构为设计具有突出优势的优异光催化剂提供了一种新思想，适用于制氢、绿色能源、水分解等。