چكيده به لاتين
Concerns about energy and the environment have become a serious problem today.
On the other hand, photocatalyst processes using metal-organic frameworks (MOFs)
and their composites with semiconductors to deal with environmental and energy
problems have attracted much attention. Herein, TMU-22 is used as a photocatalyst
for the oxidation process. To make better use of TMU-22 and g-C3N4 one of the
important strategies to improve the optical catalytic activity is to prepare its
composites with other semiconductors. Recently, carbon nitride graphite-like (gC3N4) has been developed as a new, non-metallic photocatalyst with a visible energy
gap (2.7 eV). This photocatalyst has received a lot of attention due to its special
properties such as hardness, lightness, non-toxicity, abundance, easy preparation of
available raw materials, and excellent stability in environmental conditions.
However, the high recombined velocity of the generated charge carriers, the low
ability to absorb visible light, and the low specific surface area limits its practical
applications. For this reason, TMU-22/g-C3N4-Co nanocomposite was prepared as a
new photocatalyst. Properties of the samples are characterized by powder X-ray
diffraction (PXRD), Energy-dispersive X-ray spectroscopy (EDX), Fourier
transform infrared spectroscopy (FT-IR), Thermal gravimetric analysis (TGA),
Brunauer-Emmett-Teller analysis (BET), and UV-Vis diffusion reflection
spectroscopy (DRS). In the following, the photocatalytic activity of this
nanocomposite in the oxidation reaction of benzyl alcohol under visible light was
investigated. To perform this reaction, benzyl alcohol, photocatalyst, and solvent
were exposed to visible light at ambient temperature and pressure. This reaction
using the obtained GC-FID spectroscopic results shows the proper performance of
this optical catalyst in the process of converting benzyl alcohol to benzaldehyde.
