Growth and structure evolution of SnO2 nanomaterial

• Main Authors: De Los Reyes, Ronald B., Ong, Prane Mariel B., Ngo, V., Santos, Gil Nonato C., Quiroga, Reuben V.
• Format: text
• Published: Animo Repository 2022
• Subjects: Nanostructured materials; Stannic oxide; Physics
• Online Access: https://animorepository.dlsu.edu.ph/faculty_research/5138
• Institution: De La Salle University

SnO2 nanomaterial was fabricated using the horizontal vapor phase growth technique without a catalyst or seed. The resulting crystals displayed morphologies ranging from nanobelts to nanorods as confirmed by JEOL 5310 scanning electron microscope. From the results of the DTA-DSC curve, it was shown that the nanomaterial undergone (SVLS) (solid-vapor-liquid-solid) phase growth. Comparative analysis shows that the specific heat and melting point of the SnO2 nanomaterial decreased compared to existing literature. In the present study, the metal Sn has been clearly identified existing in the SnO2 source powders after evaporation. This is an indication that the concentration of oxygen is limited in the present equipment system although a small leak is possible. The metal Sn particles are also found coexisting with SnO2 nanobelts at the high-temperature region indicating the occurrence of the decomposition of SnO2 vapors. Thus, the decomposition of SnO2 vapors is likely the dominant process to be responsible for the formation of SnO2 products in our system.