12-Molybdophosphoric acid was anchored on magnetic aminopropylsilanized graphene oxide nanosheets and used as a magnetically recoverable catalyst for solvent-free selective oxidation of benzylic alcohols into the carbonyl compounds with H2O2.
Oxidation O 0212 Photocatalytic Oxidation of Primary and Secondary Benzylic Alcohols to Carbonyl Compounds Catalyzed by H3PW12O40/SiO2 under an O2 Atmosphere. -An efficient and selective oxidation becomes possible under conditions A). -(FARHADI*, S.; AFSHARI, M.; MALEKI, M.; BABAZADEH, Z.; Tetrahedron Lett. 46 (2005) 49, 8483-8486; Dep. Chem., Lorestan Univ., Khoramabad, Iran; Eng.) -Mais 12-048
In this study, the PMo 12 O 40 3− polyanion was immobilized chemically on amino functionalized magnetic graphene oxide nanosheets. The as-prepared ternary magnetic nanocomposite (Fe 3 O 4 /GO-NH 2 /H 3 PMo 12 O 40 ) was characterized by powder X-ray powder diffraction (XRD), fourier transformation infrared spectroscopy (FTIR), Raman spectroscopy, energy dispersive spectroscopy (EDX), field emission scanning electron microscopy (FESEM), BET surface area measurements, magnetic measurements (VSM) and atomic force microscopy (AFM). The results demonstrated the successful loading of H 3 PMo 12 O 40 (~36.5 wt.%) on the surface of magnetic graphene oxide. The nanocomposite showed a higher specific surface area (77.07 m 2 /g) than pure H 3 PMo 12 O 40 (≤10 m 2 /g). The adsorption efficiency of this nanocomposite for removing methylene blue (MB), rhodamine B (RhB) and methyl orange (MO) from aqueous solutions was evaluated. The nanocomposite showed rapid and selective adsorption for cationic dyes from mixed dye solutions. The adsorption rate and capacity of Fe 3 O 4 /GO-NH 2 /H 3 PMo 12 O 40 were enhanced as compared with GO, GO-NH 2 , Fe 3 O 4 /GO-NH 2 , and H 3 PMo 12 O 40 samples due to enhanced electrostatic attraction and hydrogen-bonding interactions. The nanocomposite is magnetically separated and reused without any change in structure. Thus, it could be a promising green adsorbent for removing organic pollutants in water.
Present research has investigated the psychological well-being modelling based on the self-expression and self-efficiency in the high school students of the Imam Khomeini Relief Committee (RA). The aim of this research is to provide a model with a proper fitness. The research method is correlationaldescriptive. The statistical population of this research consists of high school students of Relief Committee studying in the academic year 93-94. A sample of 300 individuals was selected from the statistical population of 1,200 individuals. For collecting data, were used three questionnaires of Reef's psychological well-being, Scherrer's self-efficiency and Gambrill and Ritchie's selfexpression. The reliability and validity of questionnaires have been confirmed by using the Cronbach's alpha. For analyzing data, descriptive tests (variation range, mean and standard deviation) and structural equation model (LISREL) were used. Data analysis shows that the self-expression had a significant and positive effect on self-efficiency and self-efficiency has a significant and positive effect on self-expression. Self-expression has a significant and positive effect on the psychological well-being.
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