In this article, we investigate the effect of synthetic solvents on the surface characteristics of the zeolitic imidazolate framework-8 (ZIF-8) and its photocatalytic activities. Different solvents (deionized (DI) water - ZIF-8(W), methanol - ZIF-8(M), and a combination of ammonia and ethanol - ZIF-8(A)) were employed to prepare three ZIF-8 samples at room temperature. The fourth sample was obtained after 24 h immersion of ZIF-8(A) in methanol to evacuate pores which we named ZIF-8(AM). These four samples were characterized using XRD, FTIR, FESEM, BET, DRS, and AFM. BET and AFM measurements revealed that all ZIFs have a specific surface area above 1300 m²/g while their surface roughness or heterogeneity differs. In contrast to ZIF-8(AM), with the highest level of surface heterogeneity, ZIF-8(M) displayed a very smooth and homogeneous surface. We tested all as-made ZIF-8s for methanol production via CO₂ reduction under UV–vis light irradiation. The results indicate that ZIF-8(AM) produces a high amount of methanol (ca. 500 μmol.g⁻¹_cat) while ZIF-8(M) is almost inactive. These findings reveal that in addition to BET surface area, surface heterogeneity is a significant parameter on photocatalytic activity of ZIF-8.

在本文中，我们研究了合成溶剂对沸石咪唑酯骨架 8 (ZIF-8) 表面特性及其光催化活性的影响。使用不同的溶剂（去离子 (DI) 水 - ZIF-8(W)、甲醇 - ZIF-8(M) 以及氨和乙醇的组合 - ZIF-8(A)）在以下条件下制备三个 ZIF-8 样品室内温度。在将 ZIF-8(A) 浸入甲醇中 24 小时以排出孔隙后获得第四个样品，我们将其命名为 ZIF-8(AM)。使用 XRD、FTIR、FESEM、BET、DRS 和 AFM 对这四个样品进行了表征。BET 和 AFM 测量显示所有 ZIF 的比表面积都在 1300 m ²以上/g 而它们的表面粗糙度或异质性不同。与具有最高水平表面异质性的 ZIF-8(AM) 相比，ZIF-8(M) 显示出非常光滑和均匀的表面。我们测试了所有制造的 ZIF-8，在紫外-可见光照射下通过 CO ₂还原生产甲醇。结果表明，ZIF-8(AM) 产生大量甲醇（约 500 μmol.g ^-1 _cat），而 ZIF-8(M) 几乎没有活性。这些发现表明，除了 BET 表面积外，表面异质性也是 ZIF-8 光催化活性的重要参数。