Publication:
Correlation between crystal structure and thermal reaction of TiO₂ - Graphene Oxide
Correlation between crystal structure and thermal reaction of TiO₂ - Graphene Oxide
Date
2021-04
Authors
S. K. Kamarudin
Muhammad Asri Idris
Nur Farhana Diyana Mohd Yunos
Banjuraizah Johar
Ho Li Ngee
Syarifah Norfaezah Sabki
Suhaimi Illias
Journal Title
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Volume Title
Publisher
Universiti Malaysia Perlis (UniMAP)
Research Projects
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Abstract
TiO₂ - Graphene oxide (GO) (GO = 0-1.0wt %) powders were synthesised using sol-gel method and annealed at 500°C. The samples were then characterised using X-ray diffraction (XRD). The additional of GO gave significant influence on the crystal structure of TiO₂. The lattice parameter of TiO₂ were increased with decreasing GO concentration. The unit cell volume of TiO₂-GO annealed in N2 decreased with the oxygen occupancy. In contrary, the TiO₂-GO annealed in O₂ has an increase in O₂ occupancies in the lattice that was nearly proportional to its unit cell volume. A continuous weight loss was recorded by TGA at a temperature range of T= 30 - 1000°C that were associated with H2O, C-H and C-O species. It is concluded that the Ti-O-C and Ti-C bonds were formed for samples annealed in O₂ and N₂ respectively. The weight loss of TiO₂-GO annealed in O₂ is lesser than that annealed in N2 for same concentration additional GO into TiO₂.
Description
Keywords
Carbon Addition,
Graphene Oxide,
TiO₂