Abstract:The nanocomposites of poly(acryl amide-co-acrylic acid) with NaY and Clinoptilolite were prepared using ammonium persulfate as an initiator and N,N′-methylene bis acryl amide as the cross-linker. The morphology was characterized by SEM and the structure of nanocomposite materials was studied with XRD and FT-IR that showed the interaction between porous materials and poly(AAm-coAAc). Thermo gravimetric analyzer (TGA) curve shows that all the chain-extended poly(AAm-co-AAc) are stable up to 250 °C and maximum weight loss occurs at 890 °C. The TGA results indicated higher stability for poly(acryl amide-co-acrylic acid)/NaY and Clinoptilolite composites than poly(AAm-co-AAc). The adsorption and desorption behavior of methylene blue were investigated for nanocomposites. It was shown that poly(AAm-co-AAc)/NaY and Clinoptilolite nanocomposites have higher adsorption than NaY, Clinoptilolite and poly(AAm-co-AAc) alone. This effect was attributed to good interaction between the hydroxyl group in porous materials and carboxylic group in poly(AAm-co-AAc) with methylene blue.
A series of hybrid heteropoly acids (HPA) were prepared. The HPA/NaY and HPA/NaY/MCM-41 hybrids of the synthesized catalysts were characterized using XRD, BET, TGA, SEM and FT-IR techniques. The results show that reasonable amount of HPA in HPA/NaY and HPA/NaY/MCM-41 hybrids remains even after washing with water, which indicates that heteropoly anions were strongly bonded to the porous materials. The catalytic properties of the hybrid catalysts were examined for the preparation of 2-(4-nitrophenyl)-2,3-dihydro-1H-perimidine. The yield for perimidine by different catalysts was in order of HPA/NaY > HPA/NaY/MCM-41 > NaY > HPA > MCM-41.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.