Synthesis and characterization of new mesoporous material with conducting polypyrrole confined in mesoporous silica

Cheng, Qilin; Pavlı́nek, Vladimı́r; Li, Chunzhong; Lengálová, Anežka; He, Ying; Sáha, Petr

doi:10.1016/j.matchemphys.2005.09.074

Cited by 54 publications

(32 citation statements)

References 34 publications

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“…Normally acid treatment results in nano-fibriform silica, completely amorphous (Mendelovici and Frost 2005;Wypych et al 2005;Valentin and Joekes 2006b). In the present case, the XRD pattern confirms that the crystalline structure of chrysotile is maintained, associate to an amorphous structure, centered at 2θ = 20 • , attributed to amorphous silica Samadi-Maybodi and Atashabozorg 2006;Cheng et al 2006).…”

Section: Adsorbents' Characterizationsupporting

confidence: 76%

Adsorbents for acetone in cyclohexane effuent employed in Ziegler-Natta catalyst process

et al. 2008

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Adsorption of acetone from cyclohexane on silica, alumina, coal, natural and leached chrysotile was investigated. Adsorption phenomenon was investigated by non-linear fitting, considering the Langmuir or Freundlich models. According to non-linear regression, coal present the highest K L (12.07) and K F (9.115) parameters. Silica and leached chrysotile exhibited similar behavior in terms of both K L and K F parameters. Alumina presented the highest adsorption capacity according to both Langmuir (q m = 58.689) and Freundlich (1/n = 0.844) models. Nonsupported Ziegler-Natta catalyst systems were shown to be more sensitive to acetone contamination. For the polymerization reactions carried on with contaminated solvent after the percolation through the adsorbents, good results were observed in the case of silica and alumina. Coal was not suitable for use in this catalyst system, probably due to leaching of organic components by the solvent (cyclohexane).

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Section: Adsorbents' Characterizationsupporting

confidence: 76%

Adsorbents for acetone in cyclohexane effuent employed in Ziegler-Natta catalyst process

et al. 2008

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“…Encapsulation of the conducting polymer can improve the mechanical, thermal, and chemical stabilities of the assemblies, and possibly allowing individual molecular wires to be addressed. The semiconducting polypyrrole was incorporated in the channels [34][35][36]. PPy confined in the channels was confirmed by different experiment techniques, and the basic characteristics of mesoporous materials are retained after incorporation of PPy and the structure of the channels is not destroyed (Fig.…”

Section: Confined Assembly and Application Of Nanocompositesmentioning

confidence: 79%

Structure controlling and process scale-up in the fabrication of nanomaterials

2010

Front. Chem. Eng. China

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Nanotechnology is already having a significant commercial impact, and will very certainly have a much greater impact in the future. The research on process engineering and scale-up will be very important for the commercial production and application of nanomaterials, because the properties and structure of nanomaterials are not only determined by the nucleation and growth process, but also strongly affected by the engineering properties, such as the mixing, the heat and mass transfer, and also the distribution of temperature, concentration, etc. This paper will present some research work in our laboratory on the fabrication of nanomaterials. Based on the chemical engineering principle and methods, many kinds of novel nanomaterials can be synthesized and their structure can be easily controlled through adjusting the parameters of the fluid mixing, and the distribution of temperature, residence time and concentration, etc. By using the micro-mixing, heat and mass transfer and reaction control methods, the host-guest nanocomposites have been assembled and assumed as the novel electroanalytical sensing nanobiocomposite materials. Based on the principles of chemical engineering, the manufacturing technologies for magnetic powders, calcium carbonate, and titanium dioxide have been developed for commercial-scale production, and the largest production scale has reached 15 kt/year.

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“…9, increasing the CO 2 flow rate increases the pressure and hence the adsorption capacity. Previous reports [46,47] indicated that high pressure of CO 2 leads to higher interaction between amine and CO 2 molecules resulting in higher chemisorption. It was also observed that increasing the flow rate decreases both the breakthrough time and the total adsorption time showing a shorter life span of the column.…”

Section: Adsorption Of Carbon Dioxidementioning

confidence: 96%

Surface modification of oil fly ash and its application in selective capturing of carbon dioxide

Yaumi

Hussien

Shawabkeh

2013

Applied Surface Science

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Synthesis and characterization of new mesoporous material with conducting polypyrrole confined in mesoporous silica

Cited by 54 publications

References 34 publications

Adsorbents for acetone in cyclohexane effuent employed in Ziegler-Natta catalyst process

Adsorbents for acetone in cyclohexane effuent employed in Ziegler-Natta catalyst process

Structure controlling and process scale-up in the fabrication of nanomaterials

Surface modification of oil fly ash and its application in selective capturing of carbon dioxide

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