Molybdenum disulfide quantum dots (MoS₂QDs) decorated bismuth sulfide (Bi₂S₃) photocatalyst was synthesized. Photoluminescence characterization showed that the as-developed MoS₂QDs possessed intriguing up-conversion and down-conversion properties, indicating their capability to harness energy from the light spectrum ranging from ultraviolet (UV) to near-infrared (NIR). In this study, the highest hydrogen yield of 17.7 mmol/g.h was achieved by 0.14MoS₂QD/Bi₂S₃, which was almost 4.5 folds higher than that of undoped Bi₂S₃ under stimulated solar light irradiation. Furthermore, examination of the 0.14MoS₂QD/Bi₂S₃ photocatalysts under NIR irradiation showed a significant photocurrent response and an accumulative H₂ yield of 53.6 μmol/g after 6 h reaction. This is a major breakthrough as most photocatalysts can only be activated under UV and/or visible light irradiation. This work provides new insights into the design of MoS₂QD/Bi₂S₃ for harnessing energy from a broad solar spectrum to photocatalytically split water to produce hydrogen.

合成了装饰有硫化铋（Bi ₂ S ₃）的二硫化钼量子点（MoS ₂ QDs ）光催化剂。光致发光特性表明，已开发的MoS ₂ QD具有引人入胜的上转换和下转换特性，表明它们能够利用从紫外（UV）到近红外（NIR）光谱的能量。在这项研究中，通过0.14MoS ₂ QD / Bi ₂ S ₃可获得最高的氢产量17.7 mmol / gh ，这比未掺杂的Bi ₂ S ₃在受激太阳光照射下的氢产量高几乎4.5倍。此外，检查0.14MoSNIR辐照下的_2个QD / Bi ₂ S ₃光催化剂在6 h反应后显示出显着的光电流响应和H ₂累积产率为53.6μmol/ g。这是一项重大突破，因为大多数光催化剂只能在紫外线和/或可见光照射下被活化。这项工作为MoS ₂ QD / Bi ₂ S ₃的设计提供了新的见识，该MoS ₂ QD / Bi ₂ S ₃利用来自广泛太阳光谱的能量来光催化分解水以产生氢。