Novel method of catalyst preparation for selective hydrogenation of unsaturated aldehydes

Kizling, M. B.; Bigey, C.; Touroude, R.

doi:10.1016/0926-860x(95)00278-2

Cited by 32 publications

(10 citation statements)

References 10 publications

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“…5 Recent examples of successful particle syntheses in microemulsions vary from simple oxides e.g. ZrO 2 , 6 ZnO, 7,8 TiO 2 9,10 and iron oxide 11,12 to complex ceramic materials such as Ba(Mg 1/3 Ta 2/3 )O 3 , 13 BaAl 12 O 19 14 and ternary metal oxyhalides such as BiOX (X = Cl, Br, I). 15 The bismuth oxyhalides belong to the main group V-VI-VII semiconductors with tetragonal crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Preparation of photochromic transparent BiOX (X = Cl, I)/PLA nanocomposite materials via microemulsion polymerization

Henle

Kaskel

2007

J. Mater. Chem.

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Reverse w/o microemulsions consisting of lauryl acrylate (LA), trimethylolpropane triacrylate (TMPTA), nonionic surfactant and aqueous salt solutions were used for the in situ generation of BiOX (X = Cl, I) nanoparticles and their integration into transparent nanocomposite materials via in situ polymerization of the monomer microemulsions. After particle formation, a photo initiator was added to the liquid mixture and radical photopolymerization of the oil phase was initiated by UV irradiation. The monomer microemulsions were chosen according to the requirements of the polymerization conditions and the stability of the microemulsions. Microemulsions were analyzed using temperature dependent DLS experiments; the nanoparticles were characterized using XRD measurements. After polymerization solid bulk polymer nanocomposite materials were obtained. UV/vis spectroscopy confirms excellent transparency of the composite materials compared to the pure PLA/PTMPTA samples. BiOI/PLA nanocomposite materials show a new photochromic effect, changing the color from yellow to black under UV irradiation and back to yellow after air exposure. The dynamics of the photochromic effect were investigated. The source of the photochromic effect was found to be connected with redox processes between the BiOI nanoparticles and the radical initiator in the material. XRD patterns of the reduced and oxidized particles were recorded. The photochromic effect was used to create temporary patterning in the colored nanocomposite material.

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Section: Introductionmentioning

confidence: 99%

Preparation of photochromic transparent BiOX (X = Cl, I)/PLA nanocomposite materials via microemulsion polymerization

Henle

Kaskel

2007

J. Mater. Chem.

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“…Through careful control of sol preparation and the processing, various oxide nanoparticles have been synthesized, such as Fe 2 O 3 , SnO 2 Al 2 O 3 , TiO 2 and ZnO (Bruni et al, 1999;Manorama et al, 1999;Joo, et al, 2005;Shojaie-Bahaabad and TaheriNassaj, 2008). For example, Shojaie-Bahaabad and Taheri-Nassaj (2008) synthesized Į-Al 2 O 3 nanoparticles by using AlCl 3 ·6H 2 O and Al powder as raw materials.…”

Section: Sol-gel Processmentioning

confidence: 98%

Synthesis of Nanoparticles and One-Dimensional Nanomaterials

Park¹,

Choi²

2009

Nanotechnologies for Water Environment Applications

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Nanomaterials can be defined as materials that have an average phase or grain size of less than 100 nm. Nanomaterials exhibit novel properties which can significantly differ from those of bulk materials due to their unique physicochemical (i.e., size, shape) and surface (i.e., reactivity, conductivity) properties (Seigel, 1993). Also, nanomaterials themselves have different properties depending on how nanomaterials are synthesized and how their atoms and molecules are ordered. For example, metal oxide nanoparticles including semiconductor nanoparticles, which were synthesized using different methods and under different experimental conditions (i.e., temperature, reaction time), have different physicochemical and surface properties (Chan et al., 2002, Jung et al., 2007. Recently, numerous approaches based on the application of these properties have been developed and applied to the synthesis of nanomaterials. This implies that inherent properties pertaining to chemical reactivity or physical compaction play an essential role in nanomaterials synthesis.In this chapter, several common and unique techniques for nanoparticles and one-dimensional nanomaterials synthesis will be introduced. NanoparticlesPrimarily, synthesis techniques for nanoparticles can be divided into "top-down" approaches and "bottom-up" approaches. Top-down approaches typically start with a suitable bulk material and then break the bulk material into smaller pieces. Ball-milling or attrition and pattern formation are common methods of a top-down approach. For

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“…The microemulsion method has been adopted successfully in combination with the sol-gel process to obtain monodispersed platinum particles of narrow size distribution on titanium oxide for selective hydrogenation of crotonaldehyde [22]. An increased platinum-titanium oxide (metal-metal oxide) interface interaction is believed to be responsible for the selective hydrogenation of ␣-␤ unsaturated aldehydes into unsaturated alcohols.…”

Section: Hydrogenation Hydrogenolysis and Isomerisation Catalystsmentioning

confidence: 99%

Preparation of catalysts from microemulsions and their applications in heterogeneous catalysis

Eriksson

Nylén

Rojas

et al. 2004

Applied Catalysis A: General

339

144

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Novel method of catalyst preparation for selective hydrogenation of unsaturated aldehydes

Cited by 32 publications

References 10 publications

Preparation of photochromic transparent BiOX (X = Cl, I)/PLA nanocomposite materials via microemulsion polymerization

Preparation of photochromic transparent BiOX (X = Cl, I)/PLA nanocomposite materials via microemulsion polymerization

Synthesis of Nanoparticles and One-Dimensional Nanomaterials

Preparation of catalysts from microemulsions and their applications in heterogeneous catalysis

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