Browsing by Author "Ashraf Muhammad Azeem"

Now showing 1 - 8 of 8
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    A Novel Green Stabilization of TiO2 Nanoparticles onto Cotton
    (Korean Fibre Society, 2018-01-01) Noman Muhammad Tayyab; Ashraf Muhammad Azeem; Jamshaid Hafsa; Ali Azam
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    Development of Maghemite Glass Fibre Nanocomposite for Adsorptive Removal of Methylene Blue
    (KOREAN FIBER SOC, 2018-01-01) Ashraf Muhammad Azeem; Wiener Jakub; Farooq Assad; Šašková Jana; Noman Muhammad Tayyab
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    In-situ Development of Highly Photocatalytic Multifunctional Nanocomposites by Ultrasonic Acoustic Method
    (ELSEVIER SCIENCE BV, 2018-01-01) Kejzlar Pavel; Noman Muhammad Tayyab; Wiener Jakub; Šašková Jana; Ashraf Muhammad Azeem; Viková Martina; Jamshaid Hafsa
    Cotton-titania nanocomposites with multifunctional properties were synthesized through ultrasonic acoustic method (UAM). Ultrasonic irradiations were used as a potential tool to develop cotton-titania (CT) nanocomposites at low temperature in the presence of titanium tetrachloride and isopropanol. The synthesized samples were characterized by XRD, SEM, EDX and ICP-OES methods. Functional properties i.e. Ultraviolet protection factor (UPF), self-cleaning, washing durability, antimicrobial and tensile strength of the CT nanocomposites were evaluated by different methods. Central composite design and response surface methodology were employed to evaluate the effects of selected variables on responses. The results confirm the simultaneous formation and incorporation of anatase TiO2 with average crystallite size of 4 nm on cotton fabric with excellent photocatalytic properties. The sustained self-cleaning efficiency of CT nanocomposites even after 30 home launderings indicates their excellent washing durability. Significant effects were obtained during statistical analysis for selected variables on the formation and incorporation of TiO2 nanoparticles (NPs) on cotton and photocatalytic properties of the CT nanocomposites.
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    Removal of methylene blue from aqueous solution by using iron impregnated activated carbon web from waste acrylic fibres
    (O.P.S, 2016-01-01) Naeem Muhammad Salman; Baheti Vijaykumar; Militký Jiří; Wiener Jakub; Marek Jaromír; Khan Nayab; Javed Saima; Ashraf Muhammad Azeem
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    Sonochemical synthesis of highly crystalline photocatalyst for industrial applications
    (Elsevier, 2018-01-01) Noman Muhammad Tayyab; Militký Jiří; Wiener Jakub; Šašková Jana; Ashraf Muhammad Azeem; Jamshaid Hafsa; Musaddaq Azeem
    Highly photo active pure anatase form of TiO2 nanoparticles with average particle size 4 nm have been successfully synthesized by ultrasonic acoustic method (UAM). The effects of process variables i.e. precursors concentration and sonication time were investigated based on central composite design and response surface methodology. The characteristics of the resulting nanoparticles (RNP) were analyzed by scanning electron microscopy, dynamic light scattering, transmission electron microscopy, X-ray diffractometry and Raman spectroscopy. Photocatalytic experiments were performed with methylene blue dye which is considered as model organic pollutant in textile industry. A comparative analysis between the RNP and commercially available Degussa P25 for photocatalytic performance against dye removal efficiency was performed. The rapid removal of methylene blue in case of RNP indicates their higher photocatalytic activity than P25. Maximum dye removal efficiency 98.45% was achieved with optimal conditions i.e. TTIP conc. 10 mL, EG conc. 4 mL and sonication time 1 h. Interestingly, no significant difference was found in the photocatalytic performance of RNP after calcination. Moreover, self-cleaning efficiency of RNP deposited on cotton was evaluated in RGB color space. The obtained results indicate the significant impact of ultrasonic irradiations on the photocatalytic performance of pure anatase form than any other hybrid type of TiO2 nanoparticles.
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    Sorption Properties of Iron Impregnated Activated Carbon Web for Removal of Methylene Blue from Aqueous Media
    (KOREAN FIBER SOC, 2016-01-01) Naeem Muhammad Salman; Baheti Vijaykumar; Militký Jiří; Wiener Jakub; Behera Promoda Kumar; Ashraf Muhammad Azeem
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    Synthesis and Characterization of Anatase Phase Nanoparticles
    (OPS, 2016-01-01) Wiener Jakub; Jamshaid Hafsa; Ashraf Muhammad Azeem; Noman Muhammad Tayyab; Šašková Jana
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    SYNTHESIS AND CHARACTERIZATION OF HIGHLY CRYSTALLINE ANATASE FORM TITANIA BY ULTRASONIC CAVITATION METHOD
    (University of Zagreb, 2016-01-01) Noman Muhammad Tayyab; Wiener Jakub; Šašková Jana; Jamshaid Hafsa; Ashraf Muhammad Azeem