Sol–gel derived Cr(III) and Cu(II)/γ-Al2O3 doped solids: Effect of the dopant precursor nature on the structural, textural and morphological properties
作者： Abbas Khaleel , Muhammad Nawaz , Bassam Hindawi
DOI: 10.1016/J.MATERRESBULL.2013.01.027
关键词:
摘要: Abstract Powders of xerogel γ-Al2O3 doped with various concentrations Cr3+ and Cu2+ (M/M + Al molar fraction = 0.75–10%) were prepared via a sol–gel method. precursors (acetylacetonate, nitrate or chloride) added to 0.12 M 2-propanol solution aluminum tri-sec-butoxide (ASB) hydrolysis was performed using H2O/ASB ratio 4.7. The effect the dopant precursor on structural, textural morphological properties studied. Employing acac resulted in unique after calcination at 500 °C including high surface areas, as 455 m2/g, homogeneous mesopores, 3–12 nm, amorphous powders (5–10 nm particles diameter). On other hand, enhanced resistance sintering mainly higher metal loads (10%) elevated temperature (800 °C). Nevertheless, solids issued from chloride exhibited lower areas loads, sintering.
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