The exposure of rich active sites and the rapid transfer of photo-induced electron-hole pairs are important prerequisites for a photocatalyst with good performance. In this work, a low cost and high active composite Zn_0.5Cd_0.5S/ZIF-67 was successfully prepared by a hybrid growth method. The dodecahedron ZIF-67 with a very regular surface provides sufficient area for the dispersion of Zn_0.5Cd_0.5S (ZCS) nanoparticles, which greatly decreases the serious aggregation effect of ZCS particles, and is conductive to further exposing more active sites in the photocatalysis hydrogen evolution process. Moreover, compared with pure ZCS, Zn_0.5Cd_0.5S/ZIF-67 composite shows more significant ability of capture visible light in the range of 515–600 nm. The highest hydrogen production rate can reached 23264.6 μmol g⁻¹ h^-1 under visible light irradiation and the apparent quantum efficiency can reached 6.95 % at 420 nm visible light irradiation. Because of the matched valence band position for ZIF-67 and ZCS, photo-generated carrier recombination rate is greatly inhibited and photo-excited electron-hole pair separation and transfer is accelerated. By analyzing a series of characterization results (SEM, TEM, XPS, PL, UV and DFT), the possible mechanism of photocatalytic water-spitting of the composite to produce hydrogen is proposed.

富活性位点的暴露和光诱导电子-空穴对的快速转移是具有良好性能的光催化剂的重要先决条件。在这项工作中，通过杂化生长方法成功制备了低成本，高活性的复合材料Zn _0.5 Cd _0.5 S / ZIF-67。具有非常规则表面的十二面体ZIF-67为Zn _0.5 Cd _0.5 S（ZCS）纳米粒子的分散提供了足够的面积，这大大降低了ZCS粒子的严重聚集效应，并且有助于进一步暴露光催化作用中的更多活性位点析氢过程。而且，与纯ZCS相比，Zn _0.5 Cd _0.5S / ZIF-67复合材料在515-600 nm范围内捕获可见光的能力更强。在可见光照射下，最高产氢率达到23264.6μmolg ^-1 h ^-1，在420 nm可见光照射下，表观量子效率达到6.95％。由于ZIF-67和ZCS的价带位置匹配，大大抑制了光生载流子的复合速率，并加速了光激发电子-空穴对的分离和转移。通过分析一系列表征结果（SEM，TEM，XPS，PL，UV和DFT），提出了复合材料光催化水喷吐产生氢气的可能机理。