Biosynthesized silica nanosuspension as thermal fluid in parabolic solar panels

Enrique Corzo-Deluquez, Lina Pineda-Muñoz, Adiela Ruíz-Chamorro, Carlos Ocampo-López, Margarita Ramírez-Carmona, Leidy Rendón-Castrillón

    Research output: Contribution to journalArticle in an indexed scientific journalResearchpeer-review

    1 Scopus citations


    In this work, the production of biologically synthesized silica nanoparticles was proposed to prepare a nanosuspension as a thermal fluid in parabolic solar panels at the laboratory level. Silica nanoparticles were produced from construction sand in two stages. Biosynthesis broth was produced by Aspergillus niger aerated fermentation in a 1 L bioreactor for 9 days. Each supernatant was contacted with 18% construction sand in a 500 L reactor with mechanical agitation, at a temperature of 25 °C, and a contact time of 30 min. Subsequently, the separation process was carried out. For day 9, a pH value of 1.71 was obtained as well as acid concentrations of 15.78 g/L for citrus and 4.16 g/L for malic. The metal extraction efficiency of Si nanoparticles was 19%. The vibration peaks in the FTIR were characteristic of the presence of silica nanoparticles in wavenumbers 1020 cm-1 and 1150 cm-1. Finally, a prototype solar radiation test bench for parabolic systems was built and provided with a radiation source that falls on a translucent pipe that transports the nanoparticles, which has a pump and a series of thermocouples. The heat capacity of the biotechnologically produced silica nanoparticle suspension was 0.72 ± 0.05 kJ/kgK, using material and energy balances in the flow circuit.

    Original languageEnglish
    Article number142
    Pages (from-to)1-9
    Number of pages9
    Issue number2
    StatePublished - Feb 2021

    Bibliographical note

    Funding Information:
    Funding: This research was funded by The Government of Antioquia, and MINCIENCIAS, grant number CT 579-2019. Contract 80740-009-2019.

    Publisher Copyright:
    © 2021 by the authors. Licensee MDPI, Basel, Switzerland.


    • Biosynthesis
    • Nanofluids
    • Parabolic solar panels
    • Silica nanoparticles
    • Solar energy materials


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