Hollow nanostructures derived from metal-organic frameworks have attracted considerable interest for prospective applications in gas separation/storage, drug delivery, catalysis device and gas sensors. Herein, porous hollow nanostructures, namely Co₃O₄/ZnCo₂O₄ composite hollow nanostructures, are prepared through a self-sacrificing template method. The method includes the synthesis of zeolite imidazolate frameworks-67 self-sacrificing template and then transformation into Co/[email protected] layered double hydroxides precursor. Finally, the Co₃O₄/ZnCo₂O₄ composite hollow nanostructures are obtained through thermal annealing of Co/[email protected] LDH precursor in air. The gas sensing investigations revealed that the Co₃O₄/ZnCo₂O₄ composite hollow nanostructures-based gas sensor exhibited high response (16.3–100 ppm) and selectivity towards acetone. Besides, enhanced gas sensing properties of Co₃O₄/ZnCo₂O₄ composite hollow nanostructures are observed when compared with Co₃O₄ and ZnCo₂O₄ hollow nanostructures. The excellent gas sensing characteristics of Co₃O₄/ZnCo₂O₄ composite hollow nanostructures might be attributed to their high porosity, large specific surface area, and heterostructure between Co₃O₄ and ZnCo₂O₄.

源自金属有机骨架的中空纳米结构已经吸引了人们对于在气体分离/存储，药物输送，催化装置和气体传感器中的预期应用的兴趣。在此，通过自牺牲模板法制备多孔中空纳米结构，即Co ₃ O ₄ / ZnCo ₂ O ₄复合中空纳米结构。该方法包括合成沸石咪唑酸酯骨架-67自牺牲模板，然后转化为Co / [电子邮件保护的]层状双氢氧化物前体。最后，Co ₃ O ₄ / ZnCo ₂ O ₄通过在空气中对Co / [受电子邮件保护的] LDH前体进行热退火，可以获得复合空心纳米结构。气体感测研究表明，基于Co ₃ O ₄ / ZnCo ₂ O _4的复合中空纳米结构的气体传感器显示出高响应（16.3-100 ppm）和对丙酮的选择性。此外，与Co ₃ O ₄和ZnCo ₂ O ₄中空纳米结构相比，观察到增强的Co ₃ O ₄ / ZnCo ₂ O ₄复合中空纳米结构的气敏特性。Co ₃的出色的气敏特性O ₄ / ZnCo ₂ O ₄复合空心纳米结构可能归因于它们的高孔隙率，大的比表面积以及Co ₃ O ₄和ZnCo ₂ O ₄之间的异质结构。