Akademik Veri Yönetim Sistemi
SERES’21 V. International Ceramic, Glass, Porcelain Enamel, Glaze and Pigment Congress, Eskişehir, Türkiye, 13 - 15 Ekim 2021
Solar light sensitive 2-dimensional (2D) graphite
carbon nitride (g-C3N4)/titanium dioxide (TiO2)
heterojunction nanocomposites were prepared to enhance visible light activity
of TiO2. Preparation of the nanocomposites was accomplished by hydrothermal growth of TiO2
nanoparticles on the surfaces of g-C3N4 particles in one
step. The g-C3N4
content of the composites varied from 20 to 90 wt%. The composite
containing 80 wt% g-C3N4 was additionally subjected to a
regulated heat treatment at temperatures in the range from 350 to 500 oC
for 1 h to improve the photocatalytic activity. The interface and microstructural features of the nanocomposites
were characterized by X-Ray Diffraction (XRD), Field Emission Scanning Electron
Microscope (FESEM), and Diffuse Reflectance Spectra (DRS) techniques. The Methylene Blue (MB) degradation tests were
performed to evaluate the photocatalytic activity of the powders under solar
light illumination using a UV-vis spectrophotometer. Results were compared with
the results of the pristine TiO2 and g-C3N4
powders. The g-C3N4/TiO2
heterojunction nanocomposites exhibited better photocatalytic activity for
the degradation of MB than pristine TiO2 and g-C3N4
powders. An improvement in photocatalytic activity due to the generation of
reactive oxidation species induced by photogenerated electrons and to the
reduced recombination rate for electron-hole pairs was recognized