INVESTIGADORES
GOMEZ COSTA Marcos Bruno
congresos y reuniones científicas
Título:
Synthesis of an MCM-41 carbon replica using rice husk as a biowaste silicon source and its used as a hydrogen sponge
Autor/es:
JULIANA M. JUÁREZ; JHOAN F. TÉLLEZ; E. LAURA MOYANO; MARCOS B. GÓMEZ COSTA
Lugar:
Cancún
Reunión:
Congreso; XXXI International Materials Research Congress (IMRC 2023); 2023
Institución organizadora:
IMRC
Resumen:
In this work, the synthesis andcharacterization of silicon mesoporous nanostructured materials andtheir carbon replica will be carried out using eco-friendly silicon sources such asrice husk residues, to be used in the adsorption of hydrogen as an alternative in the use of green hydrogen. To obtain said nanostructured materials a synthesis technique was developed with this new eco-friendly and lowcost alternative.In this research, the silicon mesoporousmaterial MCM-41 was synthesized using rice husk as asilicon source. To obtain the precursor SiO2, the rice husk was washed several times with distilledwater to remove adhering dirt and impurities, then it was dried at 100ºC and a treatment with 3M HCl was carried out to remove metallic impurities.After washing and drying, the shell obtained wascalcined at 700 ºC for 6hours. The synthesis of the mesoporous siliceous material MCM-41 wascarried out by hydrothermal synthesis using cetyltrimethylammonium bromide (CTAB) as surfactant. The replica of the MCM-41 mesoporous material was obtained using the nanocasting technique, with sucrose as carbon source and MCM-41 as template.The materials successfully synthesized werecharacterized by X-ray diffraction, SEM, texturalproperties, and transmission electron microscopy analyses. The siliceous material MCM-41 has aBET surfaceof 710 m2/g and an average (BJH) pore diameter of 3 nm. Regarding the carbon replicaof said MCM-41material, the BET area is 860 m2/g and presents an average (BJH)pore diameter of3.5 nm.The obtained replica of MCM-41 significantlyimproved H2 storage behavior compared to CMK-3 type nanostructuredcarbon (2.4% by weight at -196,15 oC and 10 bar). The synthesized material shows promise in absorbing hydrogen by weak binding forces(physisorption).
