Synthesis and characterization of cerium oxide nanoparticles supported on nano-clays for their potential catalytic application

The emission of carbon dioxide (CO2) derived from human activities such as fossil fuel burning, forest fires and industrial processes has contributed unfavorably to the increase in global warming. Therefore, a promising alternative is the use of clay nanomaterials functionalized with metal oxides that, after being selected for their specific catalytic properties, become active centers for the adsorption and conversion of polluting gases into less harmful products. Thus, with the aim of taking advantage of the synergy between clays and metal oxides in the adsorption of acid gases (CO2), the present study focuses on the synthesis and evaluation of CeO2, ZnO and CeO2-ZnO nanoparticles supported in a matrix of clays native to the Ecuadorian Amazon region, Zamora Chinchipe province. The synthesis of these materials was carried out by the co-precipitation method, which allowed obtaining nanocomposites with a crystallite size ranging from 10-120 Å (1-12 nm). The results confirmed that the combination of CeO2 and ZnO supported on nanoclays (kaolinite, 0-25 nm) represents a promising strategy for the creation of highly efficient catalysts since the CO2 adsorption kinetics highlights the relevance of these compounds in industrial processes that require sustained and efficient adsorption over time. The stability and structural properties of these nanomaterials were determined by using characterization techniques that included Thermogravimetric Analysis (TGA) for mass degradation behavior as a function of temperature, Fourier Transform Infrared Spectroscopy (FT-IR) for the study of functional groups and X-Ray Diffraction (XRD) for the analysis of existing crystalline phases.

• Tác giả chính: Pozo Tomalá, Génesis Kerly (author)
• Định dạng: bachelorThesis
• Ngôn ngữ: eng
• Được phát hành: 2025
• Những chủ đề: Purificación de arcillas; Adsorción de CO2; Catálisis; Clay purification; Adsorption of CO2; Catalysis
• Truy cập trực tuyến: http://repositorio.yachaytech.edu.ec/handle/123456789/947