نتایج جستجو برای: boehmite nanoparticles
تعداد نتایج: 107391 فیلتر نتایج به سال:
A series of mesoporous carbonaceous materials were synthesized by the nanocasting technique using boehmite as a template and glucose carbon precursor. After pyrolysis removal, resulting material is that can be additionally doped with N, B K during prepyrolysis impregnation. In addition, influence doping on morphology, crystallinity stability carbons was studied X-ray diffraction, nitrogen physi...
a novel acrylic acid-functionalized fe3o4 magnetic nanoparticle with a core-shell structure was developed for utilization as a heterogeneous organosuperacid in chemical transformations. the structural, surface, and magnetic characteristics of the nanosized catalyst were investigated by various techniques such as transmission electron microscopy (tem), thermogravimetric analysis (tga), and ft-ir...
The adsorption of citrate, at 10 4_10 -3 M initial concentration, by pseudoboehmite suspended in 0.02 M NaC104 was investigated at varying pH. Citrate shows a strong affinity for the pseudoboehmite surface, as seen in the adsorption isotherm at pH 6. Adsorption envelopes of adsorbed citrate vs. pH for a given initial citrate concentration are characteristic for the adsorption ofa polyprotic aci...
This paper systematically studied the pore structure, crystal phase, surface acidity and chemical environment of aluminum boron-doped γ-alumina, by impregnating boron in period boehmite. The nitrogen adsorption, XRD, FTIR etc. technique was used to determine texture, crystallography, acid/base properties coordination. XRD spectrum boria-alumina have no significant change due addition boron. spe...
here, we report analysis of in vitro and in vivo drug release from an in situ formulation consisting of triamcinolone acetonide (tr) and poly(d,l-lactide-co-glycolide) (plga) and the additives glycofurol and hydroxyapatite nanoparticles (ha). we found that these additives enhanced drug release rate. we used the taguchi method to predict optimum formulation variables to minimise the initial burs...
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