In this work, a study of the secondary porosity of two zeolite‐based composites is carried out by small angle X‐ray scattering (SAXS) and N₂ adsorption at 77 K. The composites were obtained by the inclusion of ZnO nanoparticles in a Cuban natural clinoptilolite by mechanosynthesis and ‘in situ’ methods. It was observed a decrease in the specific surface area as a result of ZnO nanoparticles inclusion from 149 m² g⁻¹ in the started material to 60 m² g⁻¹ in the composite prepared by in situ method, whereas the mesopore diameter remained almost constant. The results confirmed the presence of mesopores with diameter between 3 and 36 nm, with good match by both methodologies. These materials were developed in view of their future application as catalysts and adsorbents, where the presence of secondary porosity is key to favor the diffusion processes.

中文翻译：

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古巴天然斜发沸石合成材料中SAXS和N2吸附引起的二次孔隙率的研究

在这项工作中，通过小角度X射线散射（SAXS）和在77 K下的N ₂吸附，对两种沸石基复合材料的次级孔隙率进行了研究。该复合材料是通过将ZnO纳米颗粒包含在古巴中而获得的机械合成和“原位”方法合成天然斜发沸石。观察到，由于包含ZnO纳米颗粒，比表面积从起始材料中的149 m ² g ^-1降低到60 m ² g ^-1。原位方法制备的复合材料中的中孔直径几乎保持恒定。结果证实存在直径在3到36 nm之间的中孔，两种方法都具有很好的匹配性。这些材料的开发是考虑到它们作为催化剂和吸附剂的未来应用，其中次要孔隙度的存在是促进扩散过程的关键。