Preparation of Au and Au–Pt nanoparticles within PMMA matrix using UV and X-ray irradiation

Ozkaraoglu, Eda; Tunç, İlknur; Süzer, Şefik

doi:10.1016/j.polymer.2008.12.008

Cited by 40 publications

(35 citation statements)

References 42 publications

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“…25 Together with further contributions from Ozkaraoglu 35 et al, Karadas and co-workers showed that the disappearance of Au 3+ peaks in the XPS spectra occur via first-order kinetics but at differing rates. [27][28] In view of this, the content of Au 3+ obtained by XPS always lower than those obtained by TPR is reasonable.…”

Section: Resultsmentioning

confidence: 51%

Nitrogen-modified activated carbon supported bimetallic gold–cesium(i) as highly active and stable catalyst for the hydrochlorination of acetylene

Zhao

Zhang

et al. 2015

RSC Adv.

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In the challenging acetylene hydrochlorination to vinyl chloride over Au-base catalysts, Au-Cs I catalysts are substantially more active and stable than their monometallic counterparts. Here we describe a novel nitrogen-modified activated carbon supported Au-Cs I catalyst (1Au4Cs I /NAC) delivers stable performance with acetylene conversion reaching 90.1% and there was only 1.5% C 2 H 2 conversion loss 10 after 50 h under the reaction conditions of C 2 H 2 hourly space velocity 1480 h -1 . After a careful characterization of all the catalysts, we concluded that the nitrogen atoms influence on the stability of the Au-Cs I catalysts correlate with the strengthening the adsorption of hydrogen chloride to the catalyst and consequently inhibiting Au 3+ reduction under reaction conditions. 65 Au assay 49.7%); urea (99 wt.%); CsCl (99.9 wt.%); H 2 O 2 (10 wt.%); glacial acetic acid (10 wt.%); C 2 H 2 (gas, 98%); HCl (gas, 99.999%). Catalyst preparationA commercially activated carbon NORIT ROX 0.8 was selected 70 for the preparation of support. The activated carbon was first pretreated with HNO 3 (65 wt.%) at room temperature for 1 h. Subsequently, it was filtered, washed and then dried at 110 °C for 12 h (sample AC).N-doped AC was prepared based on the process described 75

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Section: Resultsmentioning

confidence: 51%

Nitrogen-modified activated carbon supported bimetallic gold–cesium(i) as highly active and stable catalyst for the hydrochlorination of acetylene

Zhao

Zhang

et al. 2015

RSC Adv.

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“…Polymer-inorganic oxide nanoparticle composites have attracted considerable attention in the field of material science because they exhibit enhanced material properties as compared to pure polymers. The presence of inorganic oxide nanoparticle fillers in polymers can alter the thermomechanical, optical, electrical, and magnetic properties of the polymers [4]. Recently, composite materials made of polymers and nanoparticles (NPs), such as inorganic, metal, semiconductor, carbon black, and magnetic nanomaterials have attracted great attention because of the stabilizing effects of the polymer matrix on the NPs and relative easiness and flexibility of engineering this class of materials with advanced functionalities [4]- [9].…”

Section: Introductionmentioning

confidence: 99%

Thermal and Structural Analyses of PMMA/TiO<sub>2</sub> Nanoparticles Composites

El-Zaher¹,

S.Melegy²,

Guirguis³

2014

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In the present work, composites of poly(methyl methacrylate)/titanium oxide nanoparticles (100/0, 97.5/2.5, 95/5, 92.5/7.5, 90/10 and 0/100 wt/wt%) were prepared to be used as bioequivalent materials according to their importance broad practical and medical applications. Thermal properties as well as X-ray diffraction analyses were employed to characterize the structure properties of such composite. The obtained results showed variations in the glass transition temperature (T g), the melting temperature (T m), shape and area of thermal peaks which were attributed to the different degrees of crystallinity and the existence of interactions between PMMA and TiO 2 nanoparticle molecules. The XRD patterns showed sharpening of peaks at different concentrations of nano-TiO 2 powder with PMMA. This indicated changes in the crystallinity/amorphosity ratio, and also suggested that the miscibility between the amorphous components of homopolymers PMMA and nano-TiO 2 powder is possible. The results showed that nano-TiO 2 powder mix with PMMA can improve the thermal stability of the homo-polymer under investigation, leading to interesting technological applications.

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“…Nano-materials were attracted the interesting of many researchers due to their physical and chemical properties as well as their applications in different fields [1]- [4]. Also, composite materials from polymers and nanoparticles (NPs) have advanced applications in the field of material science [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

Structural Configuration and Thermal Analyses of Composite Films of Poly (methyl methacrylate)/Lead Oxide Nanoparticles

Elawam¹,

Abou-Shady²,

Morsi³

et al. 2016

IJAP

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In the present work, solution-cast method was used to prepare thin films of poly(methyl methacrylate)/lead oxide nanoparticles composites [PMMA/PbO(NPs)] due to their importance in different applications. X-ray diffraction analyses, scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FTIR) and thermal properties were employed to characterize the structure properties of such composite. The XRD patterns suggested that the miscibility between the amorphous components of PMMA and PbO nanoparticles was possible. The SEM images show the distributions and dispersions of PbO nanoparticles on the surface of PMMA and the composite films. From the FTIR results, the performance properties of PMMA depend on the concentration of PbO nanoparticles. In addition, thermal results showed variations in the melting temperature (T m), shape and area of thermal peaks which were attributed to the different degrees of crystallinity and the existence of interactions between PMMA and PbO nanoparticles molecules.

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Preparation of Au and Au–Pt nanoparticles within PMMA matrix using UV and X-ray irradiation

Cited by 40 publications

References 42 publications

Nitrogen-modified activated carbon supported bimetallic gold–cesium(i) as highly active and stable catalyst for the hydrochlorination of acetylene

Nitrogen-modified activated carbon supported bimetallic gold–cesium(i) as highly active and stable catalyst for the hydrochlorination of acetylene

Thermal and Structural Analyses of PMMA/TiO<sub>2</sub> Nanoparticles Composites

Structural Configuration and Thermal Analyses of Composite Films of Poly (methyl methacrylate)/Lead Oxide Nanoparticles

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Preparation of Au and Au–Pt nanoparticles within PMMA matrix using UV and X-ray irradiation

Cited by 40 publications

References 42 publications

Nitrogen-modified activated carbon supported bimetallic gold–cesium(i) as highly active and stable catalyst for the hydrochlorination of acetylene

Nitrogen-modified activated carbon supported bimetallic gold–cesium(i) as highly active and stable catalyst for the hydrochlorination of acetylene

Thermal and Structural Analyses of PMMA/TiO&lt;sub&gt;2&lt;/sub&gt; Nanoparticles Composites

Structural Configuration and Thermal Analyses of Composite Films of Poly (methyl methacrylate)/Lead Oxide Nanoparticles

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Thermal and Structural Analyses of PMMA/TiO<sub>2</sub> Nanoparticles Composites