چکیده
|
CdS-coupled TiO2 nanocrystals were prepared by the microemulsionmediated
solvothermal method at pretty low temperatures. The
semiconductor nanocrystals were modified with tyrosine, phenyl alanine,
glysine and glutamate aminoacids and then were characterized by BET,
SEM, EDX, XRD, UV–Vis spectroscopy, and FTIR analysis methods. The
specific surface area and the average pore diameter were found to be
about 470 m2 g−1 and 2.8 nm, respectively. Moreover, the average size of
the CdS-TiO2 particles was evaluated to be 28 nm. The results showed that
the modification process with the aminoacids improves the adsorption
capability and photoactivity of the samples. Among them, tyrosine was
determined to be the best choice. According to the results, modification
of CdS-TiO2 heterojunction photocatalyst with electron-donating groups
is an efficient strategy to increase the photoreduction of nitroaromatic
compounds. Reusability experiments were also carried out and confirmed
the high capacity of the prepared samples for t
|