Synthesis, characterization and magnetic properties of disk-shaped particles of a cobalt alkoxide: Coii(C2H4O2)

Chakroune, Nassira; Viau, Guillaume; Ammar, Souad; Jouini, N.; Gredin, Patrick; Vaulay, M.-J.; Fiévet, Fernand

doi:10.1039/b411117f

Cited by 102 publications

(90 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…10°and 17°. These two peaks are often found in organometallic precursors synthesized by a similar polyol-mediated process (Fuls et al, 1970;Larcher et al, 1998Larcher et al, , 2003Wang et al, 2003;Jiang et al, 2004;Chakroune et al, 2005), which is indicative of the formation of a metal alkoxide. In particular, the strong peak located at ca.…”

Section: Ball-like Precursormentioning

confidence: 99%

“…The XRD pattern suggests the presence of interlayer spacings in lamellar structures. According to the reported results regarding metal alkoxides (Fuls et al, 1970;Larcher et al, 1998;Chakroune et al, 2005), the characteristic strong peak at 10°can be indexed as (0 0 l). The interlayer distance was evaluated to be 8.17 Å, which is comparable to those of iron alkoxides (8.11 Å) (Fuls et al, 1970), cobalt alkoxide with 8.31 Å (Chakroune et al, 2005), and manganese alkoxide with 8.32 Å (Larcher et al, 1998).…”

Section: Ball-like Precursormentioning

confidence: 99%

See 1 more Smart Citation

Synthesis of hierarchical Mg-doped Fe3O4 micro/nano materials for the decomposition of hexachlorobenzene

Liu

Huang

et al. 2014

Chemosphere

View full text Add to dashboard Cite

Section: Ball-like Precursormentioning

confidence: 99%

Section: Ball-like Precursormentioning

confidence: 99%

Synthesis of hierarchical Mg-doped Fe3O4 micro/nano materials for the decomposition of hexachlorobenzene

Liu

Huang

et al. 2014

Chemosphere

View full text Add to dashboard Cite

“…Therefore, a wealth of methods has been developed for controlled synthesis of hierarchically nanostructured materials [15][16][17][18][19][20][21][22]. Recently, an ethylene-glycol-mediated process, based on a simple and economical route, has been used to successfully synthesize three-dimensional (3D) micro/nano materials [23][24][25][26][27][28][29]. 3D micro/nano materials are often hierarchically composed of nanosized building blocks, and the particle size is on the micrometer scale.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of flower-like Co3O4–CeO2 composite oxide and its application to catalytic degradation of 1,2,4-trichlorobenzene

Lin

Zheng

et al. 2012

Applied Catalysis B: Environmental

View full text Add to dashboard Cite

a b s t r a c tA micrometer-sized, nanostructured, flower-like Co 3 O 4 -CeO 2 composite oxide was synthesized by an ethylene-glycol-mediated process. The composite oxide was an assembly of polycrystalline nanoparticles, with a typical mesoporous structure. The composite's catalytic activity in 1,2,4-trichlorobenzene degradation was evaluated using a pulsed-flow microreactor-gas chromatography system, and compared with that of quartz sand, commercial CeO 2 , commercial Co 3 O 4 , and a Co 3 O 4 /CeO 2 equimass mixture. The composite oxide was a promising catalyst for 1,2,4-trichlorobenzene degradation. This is attributed to the structural features of the composite oxide with a high specific surface area and a high total pore volume, and the synergistic effect between the two composite phases. The easy creation of high-mobility active oxygen on CeO 2 and the easy cleavage of Co O bonds at the interface of the two components promote reactivity of Co 3 O 4 in 1,2,4-trichlorobenzene degradation. Pulsed catalytic theory suggests a first-order reaction between the composite oxide and 1,2,4-trichlorobenzene, with an apparent activation energy of about 27 kJ/mol, and degradation on the Co 3 O 4 -CeO 2 composite oxide would occur easily.

show abstract

“…[5] Structural modifications come in a number of varieties: i) the hydroxyl group can be replaced by some other type of ligand capable of a µ 3 -bridging coordination. Examples range from alkoxides, [6] to the exchange for an 4 oxygen atom from a [(Si 2 O 5 ) n ] 2n+ silicate layer, as seen in the smectite mineral group. [7] ii) The M II can be replaced by a M III ion, which is coupled to the incorporation of a charge balancing anion in the interlayer space.…”

Section: Introductionmentioning

confidence: 99%

“…Mg 6 Al 2 (OH) 16 (CO 3 )(H 2 O) 4 is a proto-typical mineral in this family, [8] but its is also possible to form all sorts of variants including the incorporation of metal tris-oxalate counter ions. [9] iii) A third family is created by the removal of some M II ions.…”

Section: Introductionmentioning

confidence: 99%

Structure and magnetism of new hybrid cobalt hydroxide materials built from decorated brucite layers

Keene¹,

Light²,

Hursthouse³

et al. 2011

Dalton Trans.

View full text Add to dashboard Cite

IntroductionThe properties of all functional electronic materials are determined by their composition and their structure. It is an ultimate goal for materials scientists to form new materials with such precise structural control as to give completely predictable electronic properties. Fortunately this ambition remains largely beyond our grasp, allowing synthetic chemists the frequent pleasure of surprise in what they may make.However, there are many important structural features which are amenable to some level of control such as the characteristic dimension of a material which has implications for many physical properties. One way to control dimensionallity is to build materials from components with different characters, typically in which the nature of electron-electron interactions varies greatly, and in which it is possible to physically segregate these parts on a microscopic level. Such a spatial confinement can be achieved in composite or hybrid materials in which characteristic "organic" ii) The M II can be replaced by a M III ion, which is coupled to the incorporation of a Fig. 1 a); 1 / 7 the maple leaf net (Fig. 1b), and so on. The first members of this series of trigonally symmetric networks are shown in ESI Figure S1. Although trigonal symmetry can be important for 2-D spin frustration, it is not a guarantee of a non-bipartite lattice. phase. Adjusting the synthetic conditions proved more fruitful and the yield of 3 was increased from a few crystals to an extractable and manageable quantity (~10 mg).We believe that there may be a correlation between the "ease of synthesis" and the role of the Na + and K + cation in the respective structures. Crystal StructuresThe structures were determined by single crystal X-ray diffraction. See Table 1 and Experimental Section for measurement, solution and refinement details. Structure of 1.The compound Co 12 (OH) 18 (ox) 3 (pip) (1) crystallises in the trigonal space group 3 P (# 147) and consists of two types of alternating layers ( Structure of 2 and 3.Compounds 2 and 3 are essentially isomorphous and isostructural crystallising in the polar trigonal space group P31c (# 159). The difference between the compounds is the alkali metal cation (Na in 2, K in 3), differences in crystal quality result in small differences between refined models (see Experimental Section). We describe the structure of 2 and give comparable details for 3 in square brackets. (Fig. 3).As with 1, the cobalt/hydroxide layer (type 1) is based on the brucite structure, although here we see a periodic loss of three out of every nineteen cobalt ions from the octahedral sites within the layer, giving the network structure shown in Figure 1d.These layer defects occur in groups of three centred about the three-fold crystallographic axis at ( 1 / 3 , 1 / 3 , c). The remaining octahedral cage of oxygen atoms forms the basal set for two tetrahedrally coordinated cobalt ions, which decorate the layer (Fig. 3b). The apical hydroxide of the CoO 4 tetrahedra is µ 3 -bridging two further Co 2+ ions wit...

show abstract

Synthesis, characterization and magnetic properties of disk-shaped particles of a cobalt alkoxide: Coⁱⁱ(C₂H₄O₂)

Cited by 102 publications

References 45 publications

Synthesis of hierarchical Mg-doped Fe3O4 micro/nano materials for the decomposition of hexachlorobenzene

Synthesis of hierarchical Mg-doped Fe3O4 micro/nano materials for the decomposition of hexachlorobenzene

Synthesis of flower-like Co3O4–CeO2 composite oxide and its application to catalytic degradation of 1,2,4-trichlorobenzene

Structure and magnetism of new hybrid cobalt hydroxide materials built from decorated brucite layers

Contact Info

Product

Resources

About