Biosilica from pyrolysis of rice husk: new hard template in the synthesis of nanomaterials with application as energy devices

Antofagasta

Conferencia; 2020 Express Conference on the Physics of Materials and Their Applications in Energy Harvesting (OnLine event); 2020

(CINVESTAV - México) y (UCN-Chile)

Hard templates of silica can be employed as a new tool in the synthesis of ceramicsmaterials with specific morphology and small dimensions. However, thesepreparations involve the use of expensive starting materials such as TEOS, amongothers. In this work, the synthesis of biosilica from rice husk, which is a wastewithout economic value with high Si content, is presented. In this way, mesoporousbiosilica was quickly obtained from fast pyrolysis of acid-treated and untreated ricehusk using a bed reactor and inert atmosphere. All silica samples have beenmorphologically and structurally characterized to achieve a porous template withdesired properties. Once the best template was obtained, it was used for thealternative preparation of perovskite LaCoO3, a promising candidate as electrodecomponent in renewable energy conversion or storage devices.