Pt掺杂二维ZnIn₂S₄纳米花促进光催化CO₂还原

Pt-Doped Two-Dimensional ZnIn₂S₄ Nanoflower Promote Photocatalytic CO₂ Reduction

摘要: 在探索高效二氧化碳(CO₂)还原光催化剂的研究中，铂(Pt)掺杂策略因其显著的催化增强效应而受到广泛关注。本研究采用光化学沉积法成功制备了Pt掺杂的ZnIn₂S₄纳米花结构，通过X射线衍射(XRD)表征证实了Pt的成功掺杂。实验结果表明，Pt的引入显著优化了材料的界面电荷转移特性。在最优Pt掺杂量条件下，ZnIn₂S₄光催化剂的CO₂还原性能达到20.7 µmol∙g⁻¹∙h⁻¹，是原始性能的3.1倍。通过多种表征手段的系统研究，发现Pt的引入不仅显著增强了ZnIn₂S₄的可见光吸收能力和光响应范围，还促进了光生载流子的分离和转移，并有效抑制了电子–空穴的复合。这为开发基于Pt掺杂的高效光催化剂提供了新的机遇和思路，有望推动光催化领域的创新和发展。

Abstract: In studies exploring efficient carbon dioxide (CO₂) reduction photocatalysts, the platinum (Pt)-doping strategy has attracted much attention due to its remarkable catalytic enhancement effect. In this study, Pt-doped ZnIn₂S₄ nanoflower structures were successfully prepared by photochemical deposition, and the successful doping of Pt was confirmed by X-ray diffraction (XRD) characterization. Experimental results show that the introduction of Pt significantly optimizes the interfacial charge transfer properties of the material. Under the condition of optimal Pt doping, the CO₂ reduction performance of ZnIn₂S₄ photocatalyst reached 20.7 µmol∙g⁻¹∙h⁻¹, which is 3.1 times of the original performance. A systematic study by multiple characterization means reveals that the introduction of Pt not only significantly enhances the visible light absorption capacity and photoresponse range of ZnIn₂S₄, but also promotes the separation and transfer of photogenerated carriers, and effectively inhibits the electron-hole complexation. This provides new opportunities and ideas for the development of efficient photocatalysts based on Pt doping, which is expected to promote the innovation and development of photocatalysis.