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Hussain R.A.,Quaid-i-Azam University | Badshah A.,Quaid-i-Azam University | Haider N.,Geoscience Advanced Research Laboratories | Khan M.D.,Quaid-i-Azam University | Lal B.,Shah Abdul Latif University
Journal of Chemical Sciences | Year: 2015

This article presents the fabrication of FeSe thin films from a single source precursor namely (1-(2-fluorobenzoyl)-3-(4-ferrocenyl-3-methylphenyl)selenourea (MeP2F)) by aerosol assisted chemical vapour deposition (AACVD). All the films were prepared via similar experimental conditions (temperature, flow rate, concentration, solvent system and reactor type) except the use of three different concentrations of two different surfactants i.e., triton and span. Seven thin films were characterized with PXRD, SEM, AFM, EDS and EDS mapping. The mechanism of the interaction of surfactant with MeP2F was determined with cyclic voltammetry (CV) and UV-Vis spectroscopy. [Figure not available: see fulltext.] © 2015 Indian Academy of Sciences.

Hussain R.A.,Quaid-i-Azam University | Badshah A.,Quaid-i-Azam University | Khan M.D.,Quaid-i-Azam University | Haider N.,Geoscience Advanced Research Laboratories | And 4 more authors.
Materials Chemistry and Physics | Year: 2015

This manuscript presents the fabrication of FeSe thin films by aerosol assisted chemical vapor deposition of a single source ferrocene incorporated selenourea precursor (1-benzoyl-3-(4-ferrocenylphenyl)selenourea) at three different temperatures (450 °C, 500 °C and 550 °C) and three different concentrations of two different surfactants (triton and span) by keeping all the other conditions of film fabrication constant to have the glimpse about the morphological changes at different temperatures and different concentrations of the surfactants separately. Fabricated thin films have been characterized by PXRD, SEM and EDS. Cyclic voltammetry and UV-vis spectroscopy have been used to find out the mechanism of interaction between the surfactants and the precursor. Methylene blue degradations studies of a representative thin film have been carried out in the presence of direct sunlight with UV-vis spectroscopy. © 2015 Elsevier B.V.

Khan I.A.,Quaid-i-Azam University | Badshah A.,Quaid-i-Azam University | Haider N.,Geoscience Advanced Research Laboratories | Ullah S.,Quaid-i-Azam University | And 2 more authors.
Journal of Solid State Electrochemistry | Year: 2014

Porous carbon (PC-900) was prepared by direct carbonization of porous metal-organic framework (MOF)-5 (Zn4O(bdc)3, bdc=1,4-benzenedicarboxylate) at 900 °C. The carbon material was deposited with PtM (M=Fe, Ni, Co, and Cu (20 %) metal loading) nanoparticles using the polyol reduction method, and catalysts PtM/PC-900 were designed for direct ethanol fuel cells (DEFCs). However, herein, we are reporting PtFe/PC-900 catalyst combination which has exhibited superior performance among other options. This catalyst was characterized by powder XRD, high-resolution transmission electron microscopy (HRTEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and selected area electron diffraction (SAED) technique. The electrocatalytic capability of the catalyst for ethanol electrooxidation was investigated using cyclic voltammetry and direct ethanol single cell testing. The results were compared with those of PtFe and Pt supported on Vulcan XC72 carbon catalysts (PFe/CX-72 and Pt/XC-72) prepared via the same method. It has been observed that the catalyst PtFe/PC-900 developed in this work showed an outstanding normalized activity per gram of Pt (6.8 mA/g Pt) and superior power density (121 mW/cm2 at 90 °C) compared to commercially available carbon-supported catalysts. © Springer-Verlag Berlin Heidelberg 2014.

Bibi S.,Quaid-i-Azam University | Farooqi A.,Quaid-i-Azam University | Hussain K.,Geoscience Advanced Research Laboratories | Haider N.,Geoscience Advanced Research Laboratories
Journal of Cleaner Production | Year: 2015

Evaluating the ability of industrial based adsorbents to remove arsenic and fluoride from drinking water has global significance due to their easy and widespread availability. Present study aimed to assess selected industrial waste materials for simultaneous removal of arsenic and fluoride from drinking water in order to find cost effective adsorbent. Commercially available Hydrated Cement, Marble Powder (waste) and Brick Powder (waste) were used. Adsorbents were characterized by using X-Ray Diffractrometry techniques. The surface morphology of adsorbents was studied by Scanning Electron Microscopy (SEM). Batch adsorption tests were employed to evaluate the percent removal and adsorption capacity of adsorbents, under optimum conditions of adsorption time, dose, pH and adsorbate concentration. Removal percentage of studied adsorbents followed the decreasing trend: Hydrated Cement > Bricks Powder > Marble Powder. Hydrated Cement showed highest percentage removal, 97% and 80% for arsenic and fluoride respectively and was selected as the best media at neutral pH compared to other four adsorbents substantiating its potential for the drinking water treatment process. The applicability of the adsorbents for As was assessed under natural conditions with As contaminated groundwater samples collected from Tehsil Mailsi. In order to determine maximum adsorption capacity of adsorbents and to understand the nature of reaction on their surfaces, Langmuir and Freundlich isotherm were calculated. This study revealed that this new adsorbent (Hydrate Cement) is indigenous, easily available and could be easily applied in order to diminish the arsenic and fluoride pollution from drinking water. © 2014 Elsevier Ltd. All rights reserved.

Khan I.A.,Quaid-i-Azam University | Badshah A.,Quaid-i-Azam University | Altaf A.A.,Quaid-i-Azam University | Tahir N.,University of Sargodha | And 2 more authors.
RSC Advances | Year: 2015

A simple and facile method is adopted for the synthesis of pure and catalyst free carbon material for supercapacitor applications. In a co-crystal synthesis, the precursors (isophthalic acid and a base, 4,4′-bipyridine) are arranged in regular pattern, followed by carbonization at 600°C under an inert atmosphere to produce pure carbon material, CIN-600. The obtained sample is characterized by many techniques, such as powder X-ray diffraction (PXRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), and gas adsorption analysis. The gas adsorption and microscopic analysis demonstrated the high porosity of the carbon sample and its irregular geometry. Owing to the excellent porosity and electrical conducting properties, CIN-600 showed enhanced capacitive performance when used as an electrode material in electric double layer capacitors. The specific capacitance of the sample was ca.181.3 F g-1 at 2 mV s-1 and maintained 91.3% of its initial capacitance in a long-term cycling test. © The Royal Society of Chemistry 2015.

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