Advantages of microwave-assisted synthesis of silica gels
| Autor: | Ana Arenillas, Miguel A. Montes-Morán, Julián Garrido, Sara F. Villanueva, Guillermo Cruz, Samantha L. Flores-López |
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| Přispěvatelé: | Ministerio de Economía, Industria y Competitividad (España), Principado de Asturias, Montes Morán, Miguel Ángel [0000-0002-8791-5582], Arenillas de la Puente, Ana [0000-0002-5388-1169], Montes Morán, Miguel Ángel, Arenillas de la Puente, Ana |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Synthesis time business.industry Microwave technology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Microwave assisted 0104 chemical sciences Colloid and Surface Chemistry Silica gels Microwave heating Scientific method 0210 nano-technology Process engineering business Mesoporous material Porosity Microwave |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC Universidad Pontificia Comillas ICAI-ICADE |
| Popis: | The sol-gel process is a commonly used methodology for producing silica gels with tailored textural properties. However, the full conventional procedure involves several steps and is complicated and time-consuming, preventing production on a large scale. In the present study, as a more practical approach, microwave heating was applied via the acid-base synthesis of different precursor mixtures. By evaluating the effect of microwaves at each synthesis step, optimal pathways were established resulting in considerable time-saving. Mesoporous gels with porosities of around 70 per cent were obtained with a reduction in time consumption of more than 90 per cent compared to conventional methods. Strict control of the production stages has led to a much better understanding of the contribution of each stage to the overall process, making it possible to much more accurately evaluate the effects of applying microwave technology on the final properties of the materials with a view to optimizing their production. The authors gratefully acknowledge the financial support received from the Ministerio de Economía, Industria y Competitividad from Spain (Project CTQ2017-87820-R) and Principado de Asturias–FICYT-FEDER (Project PCTI-Asturias IDI/2018/000118). SFL is also grateful to Administración del Principado de Asturias for her research training grant awarded through “Severo Ochoa” program. |
| Databáze: | OpenAIRE |
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