Herein, a novel room-temperature methanol sensor was designed and fabricated by constructing a core-shell heterostructure composed of stannous sulfide (SnS) and zeolitic imidazolate framework-8 (ZIF-8). The core-shell morphology of the obtained SnS/ZIF-8 nanocomposite is characterized by tiny ZIF-8 nanocrystalline uniformly attached on the surface of SnS nanoflakes. During the synthesis, the SnS surface adsorbed more Zn ions by forming S-Zn coordination bonds, which not only induced the in-situ growth of ZIF-8, but also contributed to the formation of tight heterojunctions. Benefiting from the ultrathin sensing surface of ZIF-8 and the heterogeneous interface between SnS and ZIF-8, the electrical conductivity and adsorption active sites are significantly promoted, which is clarified by the combination of experiments and first-principles calculations. Notably, the SnS/ZIF-8 sensor reveals a high response of 68.65–10 ppm methanol at 25 °C, with a low limit of detection of 8.27 ppb. Moreover, it also demonstrates excellent selectivity for methanol against different VOCs and NO₂ owing to the molecular sieving effect of ZIF-8. The present study paves the way for the design of two-dimensional sulfide/metal-organic frameworks (MOFs) heterogeneous architectures with practical gas-sensing performance.

在此，通过构建由硫化亚锡（SnS）和沸石咪唑酯骨架-8（ZIF-8）组成的核壳异质结构，设计和制造了一种新型室温甲醇传感器。所得SnS/ZIF-8纳米复合材料的核壳形貌特征是微小的ZIF-8纳米晶均匀地附着在SnS纳米薄片的表面。在合成过程中，SnS 表面通过形成 S-Zn 配位键吸附了更多的 Zn 离子，不仅诱导了 ZIF-8 的原位生长，而且有助于形成紧密的异质结。受益于 ZIF-8 的超薄传感表面和 SnS 与 ZIF-8 之间的异质界面，显着促进了电导率和吸附活性位点，结合实验和第一性原理计算阐明了这一点。值得注意的是，SnS/ZIF-8 传感器在 25 °C 下显示出 68.65–10 ppm 甲醇的高响应，检测下限为 8.27 ppb。此外，它还展示了甲醇对不同 VOC 和 NO 的出色选择性₂由于 ZIF-8 的分子筛分作用。本研究为设计具有实用气敏性能的二维硫化物/金属有机框架 (MOF) 异质结构铺平了道路。