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Mazinani B.,University of Malayer | Masrom A.K.,Industrial Nanotechnology Research Center | Beitollahi A.,Iran University of Science and Technology | Luque R.,University of Cordoba, Spain
Ceramics International | Year: 2014

A one-step hydrothermal synthesis process was developed to prepare ordered mesoporous titania-silica materials by using TEOS and TTIP as silica and titania sources, respectively, as well as P123 as a structure-directing agent in acidic conditions. The synthesized materials were hydrothermally treated at various temperatures (70, 100 and 130°C) and subsequently calcined at 600, 800 and 1000°C. Small-angle X-ray scattering (SAXS), Field Emission Scanning Electron Microscopy (FESEM), Wide angle X-ray diffraction (WAXRD), Fourier transformed infrared spectroscopy (FTIR) and N2 adsorption-desorption experiments have been used to characterize the mesoporous materials, which were subsequently evaluated in terms of photocatalytic efficiency. The results show that hydrothermal and calcination temperatures can change surface area, phase composition as well as degree of crystallinity dramatically resulting in varying photocatalytic performance. Although higher hydrothermal and calcination temperatures will result in lower surface area, a higher degree of crystallinity can be achieved which lead to improved photocatalytic properties. Very high calcination temperatures (1000°C) sharply reduce surface areas in the systems resulting in inhibiting photocatalytic efficiency. © 2014 Elsevier Ltd and Techna Group S.r.l. Source


Zainab M.,University Technical Malaysia Melaka | Jeefferie A.R.,University Technical Malaysia Melaka | Masrom A.K.,Industrial Nanotechnology Research Center | Rosli Z.M.,University Technical Malaysia Melaka
Advanced Materials Research | Year: 2012

This research, deals with modification of sol gel process for the synthesis of porous TiO2- PEG thin films with good structural integrity for environmental self-cleaning applications. Relatively, by adding the PEG with various molecular weights (300, 400, and 600) could influence the formation of TiO2 films structure and adhesion. Moreover, the formation of porous TiO2 associated with larger pores will accelerate the mass transfer of the treated contaminants in the larger pore channels. The advantages of the unique structures of as-prepared TiO22 films in the application of environmental self-cleaning systems are extensively studied by characterizing the produced films using various advanced characterization tools. Adhesion of TiO2 thin films become smooth and better surface with increasing the coating layers. The X-ray Diffraction spectrum of prepared coating shows present of anatase phase as major phase. Source


Mazinani B.,Iran University of Science and Technology | Mazinani B.,Industrial Nanotechnology Research Center | Beitollahi A.,Iran University of Science and Technology | Radiman S.,National University of Malaysia | And 4 more authors.
Journal of Alloys and Compounds | Year: 2012

Ordered TiO 2-SiO 2 mesoporous materials with BJH pore diameters in the range from 12 to 15 nm were synthesized by a one-step hydrothermal synthesis method. In this route, tetraethoxysilane (TEOS) and titanium tetraisopropoxide (TTIP) in a low pH solution were used as SiO 2 and TiO 2 precursor, respectively with P123 as a template and hexane as a micelle expander in the presence of NH 4F. In this work, we show the effect of different hydrothermal temperatures (70°C and 130°C) on pore structure and photocatalytic efficiency of the materials prepared. The synthesized materials were characterized by small-angle X-ray scattering (SAXS), N 2 adsorption-desorption experiments, X ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy (FESEM). The method could produce ordered mesoporous structure with uniform pore size of 12-15 nm and high specific surface areas S BET up to 431 m 2/g. The photocatalytic activity of the samples was evaluated by degradation of MB under UV light irradiation and results showed these mesostructure materials have much higher photocatalytic efficiency in comparison with commercial P25 titania. The results also show that for materials synthesized using higher hydrothermal temperature (130°C) resulting in increased in photocatalytic activity due to higher formation of anatase phase and more open channels by comparison with lower hydrothermal treatment (70°C). © 2011 Elsevier B.V. All rights reserved. Source


Mazinani B.,Iran University of Science and Technology | Mazinani B.,Industrial Nanotechnology Research Center | Beitollahi A.,Iran University of Science and Technology | Masrom A.K.,Industrial Nanotechnology Research Center | And 2 more authors.
AIP Conference Proceedings | Year: 2012

The effect of aging temperature on the pores of SBA-15 has been studied. The products were investigated using transmission electron microscopy (TEM), Field emission scanning electron microscopy (FESEM), small angle X-ray diffraction (SAXRD) and the nitrogen adsorption- desorption isotherm measurements. It was found that increasing the hydrothermal temperature led to formation of larger pores. © 2012 American Institute of Physics. Source


Mohamad S.M.B.,Industrial Nanotechnology Research Center | Karunakaran R.,AIMST University | Masrom A.K.,Industrial Nanotechnology Research Center | Abdullah M.Z.,Industrial Nanotechnology Research Center | Nelson J.,AIMST University
Malaysian Journal of Microbiology | Year: 2012

Aim: Nanotechnology is an increasingly growing field with its current application in Science and Technology for the purpose of manufacture of novel materials at the nanoscale level. Silver-Titania nanoparticles (AgTiO2-NPs) have been known to have inhibitory and bactericidal effects. Methodology and Results: In the present study, stable silver-titania nanoparticles coated metallic blocks were prepared for testing their efficacy against selected bacterial pathogens like Escherichia coli and Staphylococcus aureus. In the experimental part, the bacterial pathogens were inoculated on silver-titania nanoparticle coated blocks and the treatment was carried out in '0' time and '24' h interval and were enumerated. Conclusion, significance and impact of study:The results were compared with the control (uncoated metallic blocks) and analyzed by using Japanese Industrial Standard (JIS Z2801:2000) method. From this study, it was concluded that silver-titania nanoparticles has inhibitory effect on bacterial pathogen tested. Source

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