Precipitation of micro and nanosilica and PdO/silica particles from SEDS technique using supercritical CO2

IF 3.4 3区工程技术 Q2 CHEMISTRY, PHYSICAL

Journal of Supercritical Fluids Pub Date : 2024-12-28 DOI:10.1016/j.supflu.2024.106507

Alexander Junges , Thais Feiden , Bruno Fischer , Marcos Hiroiuqui Kunita , Silvana Mattedi , Claudio Dariva , Silvia Maria Egues , Eunice Valduga , Elton Franceschi

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引用次数: 0

Abstract

This study utilized the Solution-Enhanced Dispersion by Supercritical Fluids (SEDS) technique to precipitate micro and nanosilica and PdO/silica composites using supercritical CO₂ as an anti-solvent and an ionic liquid as an adjuvant. Unlike previous studies, this work uniquely combines the sol-gel process with supercritical CO₂ technology, introducing ionic liquids to significantly enhance the surface area (up to 38-fold) and structural integrity of the silica particles. A detailed factorial experimental design was implemented to optimize key parameters such as temperature, CO₂ flow rate, and ionic liquid concentration, leading to the controlled synthesis of uniform nanoparticles and stable PdO/silica composites. The findings highlight the potential of this SEDS technique for advancements in materials science, catalysis, drug delivery, and environmental technology.

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超临界CO2沉淀法制备微、纳米二氧化硅和PdO/二氧化硅颗粒

本研究利用超临界流体溶液增强分散（SEDS）技术，以超临界二氧化碳作为抗溶剂，离子液体作为佐剂，沉淀微纳米二氧化硅和PdO/二氧化硅复合材料。与以往的研究不同，这项工作独特地将溶胶-凝胶工艺与超临界CO2技术相结合，引入离子液体，显著提高了二氧化硅颗粒的表面积（高达38倍）和结构完整性。通过详细的析因实验设计，优化了温度、CO2流速和离子液体浓度等关键参数，从而可控地合成了均匀的纳米颗粒和稳定的PdO/二氧化硅复合材料。这些发现突出了这种SEDS技术在材料科学、催化、药物输送和环境技术方面的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Supercritical Fluids 工程技术-工程：化工

CiteScore

7.60

自引率

10.30%

发文量

236

审稿时长

56 days

期刊介绍： The Journal of Supercritical Fluids is an international journal devoted to the fundamental and applied aspects of supercritical fluids and processes. Its aim is to provide a focused platform for academic and industrial researchers to report their findings and to have ready access to the advances in this rapidly growing field. Its coverage is multidisciplinary and includes both basic and applied topics. Thermodynamics and phase equilibria, reaction kinetics and rate processes, thermal and transport properties, and all topics related to processing such as separations (extraction, fractionation, purification, chromatography) nucleation and impregnation are within the scope. Accounts of specific engineering applications such as those encountered in food, fuel, natural products, minerals, pharmaceuticals and polymer industries are included. Topics related to high pressure equipment design, analytical techniques, sensors, and process control methodologies are also within the scope of the journal.