Author/Authors :
Bamoharram, Fatemeh F Department of Chemistry - Mashhad Branch - Islamic Azad University, Mashhad , Niknezhad, Heydar Department of Chemistry - Mashhad Branch - Islamic Azad University, Mashhad , Baharara, Javad Department of Biology - Mashhad Branch - Islamic Azad University, Mashhad , Ayati, Ali Department of Chemistry - Lappeenranta University of Technology - Mikkeli, Finland , Ebrahimi, Mahmood Department of Chemistry - Mashhad Branch - Islamic Azad University, Mashhad , Heravi, Majid M Department of Chemistry - Alzahra University, Tehran
Abstract :
Dawson heteropolyacid, H6[P2W18O62], was
chemically anchored to the amine-functionalized nanosilica
surface in different loadings. The synthesized nanocomposite
was characterized by FT-IR spectroscopy and
N2 adsorption experiments. The preservation of the structure
of the Dawson and dispersion of the cluster on the
support were verified on the basis of the spectroscopic data.
The photocatalytic degradation efficiency of the synthesized
nanocomposites was studied using an aqueous solution
of malachite green dye as a model water pollutant. The
mineralization of dye contents was investigated in different
loadings from 10 to 30 % at room temperature. Decolorization
was observed in shorter time using 30 % loading.
The photocatalyst was reusable after the filtration and
remained active even after being washed with hot water,
which confirm its attachment firmly to the surface of
amine-functionalized nanosilica.
Keywords :
Heteropolyacid , Dawson , Nanocomposite , Amine-functionalized nanosilica , Photodegradation , Malachit green
