ZnO nanoparticles supported on mesoporous MCM-41 and SBA-15: a comparative physicochemical and photocatalytic study

Mihai, G. D.; Meynen, Vera; Mertens, Myrjam; Bilba, Nicolae; Cool, Pegie; Vansant, Etienne F.

doi:10.1007/s10853-010-4652-8

Cited by 79 publications

(36 citation statements)

References 45 publications

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“…On the macroscopic scale, this can be interpreted as meaning that there were local regions, smaller than the detection limit of XRD (ca. 3 nm), [39][40][41][42] with a greater ordering of PET molecules than in the completely amorphous counterpart. None of the bres contained any conventional PET crystals and they were considered to be completely amorphous.…”

Section: Tensile Testingmentioning

confidence: 93%

Electrospinning of recycled PET to generate tough mesomorphic fibre membranes for smoke filtration

et al. 2015

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Tough fibrous membranes for smoke filtration have been developed from recycled polyethylene terephthalate (PET) bottles by solution electrospinning. The fibre thicknesses were controlled from 0.4 to 4.3 mm by adjustment of the spinning conditions. The highest fibre strength and toughness were obtained for fibres with an average diameter of 1.0 mm, 62.5 MPa and 65.8 MJ m À3 , respectively. The Xray diffraction (XRD) patterns of the fibres showed a skewed amorphous halo, whereas the differential scanning calorimetry (DSC) results revealed an apparent crystallinity of 6-8% for the 0.4 and 1 mm fibres and 0.2% crystallinity for the 4.3 mm fibres. Heat shrinkage experiments were conducted by exposing the fibres to a temperature above their glass transition temperature (T g ). The test revealed a remarkable capability of the thinnest fibres to shrink by 50%, which was in contrast to the 4.3 mm fibres, which displayed only 4% shrinkage. These thinner fibres also showed a significantly higher glass transition temperature (+15 C) than that of the 4.3 mm fibres. The results suggested an internal morphology with a high degree of molecular orientation in the amorphous segments along the thinner fibres, consistent with a constrained mesomorphic phase formed during their rapid solidification in the electric field. Air filtration was demonstrated with cigarette smoke as a model substance passed through the fibre mats.The 0.4 mm fibres showed the most effective smoke filtration and a capacity to absorb 43Â its own weight in smoke residuals, whereas the 1 mm fibres showed the best combination of filtration capacity (32Â) and mechanical robustness. The use of recycled PET in the form of nanofibres is a novel way of turning waste into higher-value products.

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Section: Tensile Testingmentioning

confidence: 93%

Electrospinning of recycled PET to generate tough mesomorphic fibre membranes for smoke filtration

et al. 2015

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“…MS materials, such as MCM-41 and SBA-15, have been extensively investigated due to their unique properties [12][13][14]. In response to this, MSN have become increasingly important because of their high surface area, highly uniform pore distribution, tunable pore size, and unique hosting properties.…”

Section: Introductionmentioning

confidence: 99%

Tailoring the metal introduction sequence onto mesostructured silica nanoparticles framework: Effect on physicochemical properties and photoactivity

Jusoh

Jalil

Triwahyono

et al. 2015

Applied Catalysis A: General

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“…As a consequence, quite different E g values for ZnO samples are found in the literature. For instance, a threshold wavelength values of 240 nm [24], 290 nm [25], and 360 nm [26] are found corresponding to band gaps 5.15, 4.28, and 3.45, respectively. absorbency in the visible light region with the iron doping.…”

Section: Uv-vis-drs Analysismentioning

confidence: 99%

Nano-sized Fe-metal catalyst on ZnO–SiO2: (photo-assisted deposition and impregnation) Synthesis routes and nanostructure characterization

Mohamed

Alrayyani

Baeissa

et al. 2011

Journal of Alloys and Compounds

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ZnO nanoparticles supported on mesoporous MCM-41 and SBA-15: a comparative physicochemical and photocatalytic study

Cited by 79 publications

References 45 publications

Electrospinning of recycled PET to generate tough mesomorphic fibre membranes for smoke filtration

Electrospinning of recycled PET to generate tough mesomorphic fibre membranes for smoke filtration

Tailoring the metal introduction sequence onto mesostructured silica nanoparticles framework: Effect on physicochemical properties and photoactivity

Nano-sized Fe-metal catalyst on ZnO–SiO2: (photo-assisted deposition and impregnation) Synthesis routes and nanostructure characterization

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