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Nanocomposites of polymer/V2O5 based on aniline and p-benzoquinine monomers have been synthesized by in situ polymerization method. The PANI/V2O5 and poly(ANI-pBQ)/V2O5 with different amounts of V2O5 (0.5 g and 1.5 g) were characterized by XRD, FT-IR, UV–Vis, SEM and TGA. This results confirmed the distribution of V2O5 in polymers matrix and confirms that poly(ANI-pBQ)/V2O5 form demonstrates a good electrical conductivity and higher crystalline nature than that of PANI/V2O5 samples. FT-IR spectrum has confirmed successful synthesis of polymer/v2O5, optical and electrical properties were discussed. Also, the results of the electrochemical test showed a clear and good electroactivity for samples. [ABSTRACT FROM AUTHOR]

The optimum conditions for acid activation of diatomite for maximizing bleaching efficiency of the diatomite in sun flower oil treatment were studied. Box-Behnken experimental design combining with response surface modeling (RSM) and quadratic programming (QP) was employed to obtain the optimum conditions of three independent variables (acid concentration, activation time and solid to liquid) for acid activation of diatomite. The significance of independent variables and their interactions were tested by means of the analysis of variance (ANOVA) with 95 % confidence limits ( α = 0.05). The optimum values of the selected variables were obtained by solving the quadratic regression model, as well as by analyzing the response surface contour plots. The experimental conditions at this global point were determined to be acid concentration = 8.963 N, activation time = 11.9878 h, and solid to liquid ratio = 221.2113 g/l, the corresponding bleaching efficiency was found to be about 99 %. [ABSTRACT FROM AUTHOR]