Preparation and characterization of nanocrystalline CuAl2O4 spinel catalysts by sol–gel method for the hydrogenolysis of glycerol

Kwak, Byoung Kyu; Park, Dae Sung; Yun, Yang; Yi, Jongheop

doi:10.1016/j.catcom.2012.03.029

Cited by 99 publications

(46 citation statements)

References 23 publications

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“…In the recent years, wet chemical technologies have been employed to synthesize copper aluminate with high homogeneity, low calcination temperature and fine particle size. These methods involve sol-gel [5][6][7], sonochemical [4,8], reverse microemulsion [9], and other related methods. Among these methods, co-precipitation process is one of the interesting methods because of the inexpensive raw materials, a simple synthesis procedure and commonly available apparatus [10,11].…”

Section: Introductionmentioning

confidence: 99%

Nanostructured CuAl2O4: Co-precipitation synthesis, optical and photocatalytic properties

Hassanzadeh-Tabrizi

Pournajaf

Moradi-Faradonbeh

et al. 2016

Ceramics International

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Section: Introductionmentioning

confidence: 99%

Nanostructured CuAl2O4: Co-precipitation synthesis, optical and photocatalytic properties

Hassanzadeh-Tabrizi

Pournajaf

Moradi-Faradonbeh

et al. 2016

Ceramics International

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“…Furthermore, it was observed that the aluminate spinel may effectively inhibit the coke formation and the thermal sintering. 22 Copper aluminate-like structure (copper-modified alumina) is rarely studied in the glycerol conversion to byproducts, 23 remaining as a largely unexplored research topic.…”

Section: Introductionmentioning

confidence: 99%

Non-Crystalline Copper Oxide Highly Dispersed on Mesoporous Alumina: Synthesis, Characterization and Catalytic Activity in Glycerol Conversion to Acetol

Braga¹,

Essayem²,

Valentini³

2016

Química Nova

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Polymeric precursor method and wet impregnation route were applied to synthesize copper and aluminium-based catalysts in order to obtain a material with interesting properties in catalytic reactions. The changes in the structural, morphological and textural properties due to the choice of preparation method were characterized by different techniques, such as XRD, N 2 physisorption isotherms and SEM. The XRD results of the solids present the formation of γ-Al 2 O 3 or CuO and β-Al(OH) 3 , depending on the preparation method. The average crystallite diameters of the alumina were estimated by the Scherrer's formula with a particle size of 5.2 nm. N 2 physisorption isotherms analysis shows that the alumina is a mesoporous material with a high specific surface area. An excessive increase in surface area was observed after Cu 2+ insertion by wet impregnation from β-Al(OH) 3 support, which is explained by the redissolution and recrystallization of bayerite to γ-Al 2 O 3 during the impregnation of Cu 2+ and recalcination process, respectively. The SEM images confirmed this phenomenon. Catalytic tests explain that the combination of the two methods improves the activity, selectivity and the stability in the conversion of glycerol to acetol. The results indicate that the way of catalyst preparation affects its structural, textural and morphological properties and consequently the catalytic performance.

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“…This result could suggest the formation of Cu-O-Al linkage on the CuAl-12 sample. Several authors [19,38] hypothesized that when direct Cu-O-Al surface linkages are formed (due, for example, to the presence of CuAl 2 O 4 ), the Cu dispersion is improved. This phase, no detected by any analysis method, could be present as microdomains.…”

Section: Benzaldehyde Reduction Under Dihydrogenmentioning

confidence: 99%

Benzaldehyde reduction over Cu–Al–O bimetallic oxide catalyst. Influence of pH during hydrothermal synthesis on the structural and catalytic properties

Haddad

Saadi

Löfberg

et al. 2015

Journal of Molecular Catalysis A: Chemical

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Preparation and characterization of nanocrystalline CuAl2O4 spinel catalysts by sol–gel method for the hydrogenolysis of glycerol

Cited by 99 publications

References 23 publications

Nanostructured CuAl2O4: Co-precipitation synthesis, optical and photocatalytic properties

Nanostructured CuAl2O4: Co-precipitation synthesis, optical and photocatalytic properties

Non-Crystalline Copper Oxide Highly Dispersed on Mesoporous Alumina: Synthesis, Characterization and Catalytic Activity in Glycerol Conversion to Acetol

Benzaldehyde reduction over Cu–Al–O bimetallic oxide catalyst. Influence of pH during hydrothermal synthesis on the structural and catalytic properties

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