As an n-type metallic oxide semiconductor with a wide bandgap of 3.37 eV, ZnO suffers from low sensitivity for gas sensor application. In order to improve the gas sensitivity, Zn- metal-organic frameworks (MOFs) were synthesized by introducing organic ligands of H₂BDC/H₂NDC via DMF-C₂H₆O₂ binary solvothermal method, and then the MOFs were integrated with Tb³⁺. After calcination at 450 ℃, Tb@Zn-BDC/Tb@Zn-NDC derivate, labeled as Tb₂O₃ @ZnO-1/Tb₂O₃ @ZnO-2, were obtained. The MOFs or derivates were characterized by various techniques. Interestingly, Zn-NDC MOFs were observed to be assembled by loose bundles with a rough surface and Tb@Zn-NDC MOF maintained the morphology of loose bundles with dispersed Tb₂O₃ nanoparticles. The Tb₂O₃ @ZnO-2 were composed of granular Tb₂O₃ and ZnO nanorods, where p-n heterojunction is formed at the contact interfaces， exhibiting the best sensitivity of 13.26–100 ppm acetic acid at 20 ℃. In particular, the sensitivity increased up to 41.57 and the lowest detection limit was only 500 ppb under UV light excitation. The enhanced sensing performance to acetic acid is attributed to the mesoporous structure of MOF derivatives, formation of p-n heterostructures and UV light irradiation.

作为具有 3.37 eV 宽带隙的 n 型金属氧化物半导体，ZnO 在气体传感器应用中存在灵敏度低的问题。为提高气敏性，采用DMF-C ₂ H ₆ O _{2二元溶剂热法引入H 2} BDC/H ₂ NDC有机配体合成Zn-金属有机骨架(MOFs) ，并将MOFs集成与 Tb ³⁺。经450℃煅烧后，Tb@Zn-BDC/Tb@Zn-NDC衍生物，标记为Tb ₂ O ₃ @ZnO-1/Tb ₂ O ₃@ZnO-2，获得。MOF 或衍生物通过各种技术进行表征。有趣的是，观察到 Zn-NDC MOF 由具有粗糙表面的松散束组装而成，而 Tb@Zn-NDC MOF 保持松散束与分散的 Tb ₂ O ₃纳米粒子的形态。Tb ₂ O ₃ @ZnO-2由粒状Tb ₂ O _3组成和 ZnO 纳米棒，在接触界面处形成 pn 异质结，在 20 ℃ 时表现出 13.26–100 ppm 乙酸的最佳灵敏度。特别是，在紫外光激发下，灵敏度提高到 41.57，最低检测限仅为 500 ppb。对乙酸的增强传感性能归因于 MOF 衍生物的介孔结构、pn 异质结构的形成和紫外光照射。