Synthesis &amp; characterization of silica coated and functionalized silica coated zinc oxide nanomaterials

El‐Nahhal, Issa M.; Salem, Jamil K.; Kuhn, S.; Hammad, Talaat M.; Hempelmann, Rolf; Bhaisi, Sara Al

doi:10.1016/j.powtec.2015.09.042

Cited by 52 publications

(54 citation statements)

References 33 publications

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“…In typical synthesis of CuO nanopowders [27,28], 20 mmol of copper sulfate pentahydrate (CuSO 4 Á5H 2 O) was dissolved into 25 mL of deionized water. Oxalic acid (20 mmol) was dissolved in an equal volume of deionized water and added dropwise to copper sulfate solution under magnetic stirring for 60 min.…”

Section: Synthesis Of Cuo Nanoparticlesmentioning

confidence: 99%

“…The silica-coated copper oxide microspheres labeled as CuO@SiO 2 were prepared in similar reported method [18,28] through a simple sol-gel process. Briefly, 0.10 g of CuO particles was dispersed in a mixture of ethanol (40 mL), deionized water (10 mL) and concentrated ammonia solution (28 wt%, 1.2 mL) by ultrasonication for 1 h. To the above mixture, 0.43 mL of TEOS was added dropwise.…”

Section: Synthesis Of Cuo@sio 2 Microspheresmentioning

confidence: 99%

“…Two-layer microspheres labeled hereafter as CuO@SiO 2 @mSiO 2 composite were prepared in a similar method described [18,28] by dispersing 0.10 g of CuO@SiO 2 in 60 mL ethanol and 1.2M concentrated ammonia solution (28 wt%), and then the mixture was ultrasonicated for 1 h. An ethanolic solution containing 0.30 g CTAB was added to the mixture under constant stirring for 6 h. Afterward, 0.43 mL of TEOS was added dropwise under mechanical agitation for further 6 h, and the obtained particles were separated by centrifugation at 4000 rpm and washed with deionized water. The product was dried at 100°C for 6 h and then calcinated at 500°C for 3 h to remove CTAB (Scheme 1).…”

Section: Synthesis Of Cuo@sio 2 @Msio 2 Microspheresmentioning

confidence: 99%

“…Amine or thiol functionalization of CuO or CuO@mSiO 2 or CuO@SiO 2 @mSiO 2 microspheres was prepared as previously described [18,28] by dispersing 1.0 g of CuO, CuO@mSiO 2 , CuO@mSiO 2 or CuO@SiO 2 @mSiO 2 with the appropriate amount (0.37 g, 0.002 mol) of 3-thiolpropyltrimethoxy silane or 3-aminepropyltrimethoxy silane coupling agent in 20 mL of dry toluene. The mixture was refluxed for 24 h at 110°C.…”

Section: Synthesis Of Cuo@sio 2 @Msio 2 Microspheresmentioning

confidence: 99%

“…The formation of mesoporous silica layer is useful for modification by amine and thiol silane functional groups. Six silica-, meso-silica-and their functionalized silica-coated copper oxide nanocomposites are prepared in a similar method [18,28]. Free silica-coated materials are obtained by etching the CuO nanoparticles using HCl [29].…”

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of silica-, meso-silica- and their functionalized silica-coated copper oxide nanomaterials

El‐Nahhal

Salem

Kuhn

et al. 2016

J Sol-Gel Sci Technol

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Silica-or meso-silica-or silica-meso-silicacoated copper oxide microspheres were prepared based on base hydrolysis of tetraethyl orthosilicate in the presence of CuO and CTAB. Functionalization with amine or thiol organofunctional groups was conducted onto the surface of silica-meso-silica-coated copper oxide microspheres (Scheme 1). The silica-coated CuO composites and their amine-or thiol-functionalized materials have been characterized by TEM, XRD, TGA, FTIR and UV/Vis. TEM analysis showed that the CuO nanoparticles were encapsulated and dispersed into the silica or meso-silica microspheres. XRD analysis indicated that the size of CuO nanoparticles has decreased after coating with silica precursors. TGA and FTIR results indicated that the mesosilica-coated copper oxide materials have been successfully grafted by amine and thiol organofunctional groups. Graphical Abstract

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Section: Synthesis Of Cuo Nanoparticlesmentioning

confidence: 99%

Section: Synthesis Of Cuo@sio 2 Microspheresmentioning

confidence: 99%

Section: Synthesis Of Cuo@sio 2 @Msio 2 Microspheresmentioning

confidence: 99%

Section: Synthesis Of Cuo@sio 2 @Msio 2 Microspheresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis and characterization of silica-, meso-silica- and their functionalized silica-coated copper oxide nanomaterials

El‐Nahhal

Salem

Kuhn

et al. 2016

J Sol-Gel Sci Technol

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Dissecting the Molecular Properties of Nanoscale Materials Using Nuclear Magnetic Resonance Spectroscopy

Agarwal

Poluri

2022

Spectroscopy and Characterization of Nanomaterials and Novel Materials

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Material‐related losses of natural rubber composites with surface‐modified nanodiamonds

Shakun

Sarlin

Vuorinen

2019

J of Applied Polymer Sci

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Dielectric elastomer generators (DEGs) offer a solution for the growing sustainable energy needs. Despite the active research on DEGs, currently used materials do not possess the required properties to achieve the full potential performance of such generators, thus, limiting an economical attractiveness of DEGs. Therefore, tailor-made materials for DEGs are in demand. Customizing the natural rubber recipe allows both dielectric and mechanical loss reduction, while the addition of nanodiamonds lowers the stress relaxation and hysteresis loss even further. The effect is most pronounced after chemical modification of nanodiamonds with silane coupling agents. Moreover, such modified nanodiamonds show less dielectric losses compared to unmodified nanodiamonds and allow reducing the dynamic loss tangent of the compound.Some research has been done on filled NR, showing the effect of filler modification on dielectric behavior, which usually increased Additional Supporting Information may be found in the online version of this article.

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Synthesis & characterization of silica coated and functionalized silica coated zinc oxide nanomaterials

Cited by 52 publications

References 33 publications

Synthesis and characterization of silica-, meso-silica- and their functionalized silica-coated copper oxide nanomaterials

Synthesis and characterization of silica-, meso-silica- and their functionalized silica-coated copper oxide nanomaterials

Dissecting the Molecular Properties of Nanoscale Materials Using Nuclear Magnetic Resonance Spectroscopy

Material‐related losses of natural rubber composites with surface‐modified nanodiamonds

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