Sn₃O₄, a common two-dimensional semiconductor photocatalyst, can absorb visible light. However, owing to its rapid recombination of photogenerated electron-hole pairs, its absorption is not sufficient for practical application. In this work, a Sn nanoparticle/Sn₃O_4−x nanosheet heterostructure was prepared by in situ reduction of Sn₃O₄ under a H₂ atmosphere. The Schottky junctions formed between Sn and Sn₃O_4−x can enhance the photogenerated carrier separation ability. During the hydrogenation process, a portion of the oxygen in the semiconductor can be extracted by hydrogen to form water, resulting in an increase in oxygen vacancies in the semiconductor. The heterostructure showed the ability to remove Rhodamine B. Cell cytocompatibility experiments proved that Sn/Sn₃O_4−x can significantly enhance cell compatibility and reduce harm to organisms. This work provides a new method for the fabrication of a Schottky junction composite photocatalyst rich in oxygen vacancies with enhanced photocatalytic performance.

常见的二维半导体光催化剂Sn ₃ O ₄可以吸收可见光。然而，由于其光生电子-空穴对的快速重组，其吸收不足以用于实际应用。在这项工作中，通过在H ₂气氛下原位还原Sn ₃ O ₄制备了Sn纳米颗粒/ Sn ₃ O _{4- x}纳米片异质结构。Sn和Sn ₃ O _{4− x}之间形成的肖特基结可以增强光生载流子的分离能力。在氢化过程中，半导体中的一部分氧可被氢提取而形成水，从而导致半导体中氧空位的增加。异质结构显示了去除罗丹明B的能力。细胞细胞相容性实验证明，Sn / Sn ₃ O _{4− x}可以显着增强细胞相容性并减少对生物的伤害。这项工作提供了一种新的方法来制造具有增强的光催化性能的富氧空缺的肖特基结复合光催化剂。