Photocatalytic hydrogen production is an effective strategy for meeting energy challenges. Here, a composite for photocatalytic hydrogen production via introduction of UiO-66 nanospheres into flower-shaped ZnIn2S4 microspheres (ZIS/U6) is described. The optimum composite with 20 mg UiO-66 loading displayed the high photocatalytic rate of 1860.9 µmol g−1 h−1 with an apparent quantum efficiency of 1.4% at 420 nm under visible-light irradiation, which is nearly 3 times higher than that of ZnIn2S4. The improved photocatalytic H2 rate mainly benefited from effective electron transfer between ZnIn2S4 and UiO-66. Additionally, we tried to introduce UiO-66-NH2 and UiO-66-(SH)2 with excellent visible light absorption into ZnIn2S4 to obtain composites. Surprisingly, they did not exhibit better photocatalytic hydrogen production rates. Combined with the electrochemical test results, it was found that they had completely different electron transfer paths from ZIS/U6. Therefore, a different photocatalytic mechanism was proposed and further verified by transient photocurrent.
光催化制氢是应对能源挑战的有效策略。本文描述了一种通过将 UiO-66 纳米球引入花形 ZnIn2S4 微球 (ZIS/U6) 中进行光催化制氢的复合材料。负载20 mg UiO-66的最佳复合材料在可见光照射下表现出1860.9 µmol g−1 h−1的高光催化速率,420 nm处的表观量子效率为1.4%,比传统的复合材料高出近3倍。 ZnIn2S4。光催化产氢率的提高主要得益于ZnIn2S4和UiO-66之间的有效电子转移。此外,我们尝试将具有优异可见光吸收能力的UiO-66-NH2和UiO-66-(SH)2引入到ZnIn2S4中以获得复合材料。令人惊讶的是,它们并没有表现出更好的光催化产氢率。结合电
化学测试结果,发现它们与ZIS/U6具有完全不同的电子传递路径。因此,提出了不同的光催化机理,并通过瞬态光电流进一步验证。