Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, PR China.
Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng 252059, PR China.
J Colloid Interface Sci. 2019 Feb 15;536:694-700. doi: 10.1016/j.jcis.2018.10.097. Epub 2018 Oct 31.
Spontaneous solar-driven water splitting to generate H with no pollution discharge is an ideal H generation approach. However, its efficiency remains far from real application owing to the poor light-harvesting and ultrafast charge recombination of photocatalysts. To address these issues, herein, we employed a novel but simple chemical bath deposition (CBD) method to construct CdS/SrTiO nanodots-on-nanocubes at room temperature (ca. 25 °C). The as-synthesized nanohybrids not only expand light absorption from ultraviolet (UV) to visible light but also significantly retard charge recombination owing to the well-defined heterostructure formation. As a result, the CdS/SrTiO exhibits high photocatalytic performance with H evolution rate of 1322 μmol g h, which is 2.8 and 12.2 times higher than that of pristine CdS and SrTiO, respectively. This work provides a universal approach for the heterostructure construction, and inspired by this, higher efficient photocatalysts for H evolution may be developed in the near future.
自发的太阳能驱动水分解生成氢气，无污染物排放，是一种理想的氢气生成方法。然而，由于光催化剂的光捕获和超快电荷复合性能较差，其效率仍远远不能满足实际应用的要求。为了解决这些问题，本文采用了一种新颖但简单的室温化学浴沉积（CBD）方法在 SrTiO3 纳米立方体上原位生长 CdS 纳米点（约 25°C）。所合成的纳米杂化材料不仅扩展了光吸收范围，从紫外光（UV）扩展到可见光，而且由于明确的异质结构形成，显著减缓了电荷复合。因此，CdS/SrTiO3 表现出高的光催化性能，析氢速率为 1322 μmol·g-1·h-1，分别是纯 CdS 和 SrTiO3 的 2.8 倍和 12.2 倍。这项工作为构建异质结构提供了一种通用的方法，受此启发，未来可能会开发出更高效的用于析氢的光催化剂。
