Document Details

Document Type : Article In Journal 
Document Title :
Synthesis, characterization and photocatalytic activity of Al2O3-TiO2 based composites
تخليق وتعريف النشاط التحفيزى الضوئى لخليط اكسيد الألمونيوم واكسيد التيتانيوم
 
Subject : Enviromental sciences 
Document Language : English 
Abstract : The synthesis, characterization and photocatalytic performance of non-traditional Al2O3-TiO2-based photocatalysts is reported. Al2O3-TiO2 support was loaded with various fractions of CuO and ZrO2. A sound agreement was observed between the bandgaps of synthesized powders measured byUV-Visible diffuse reflectance spectroscopy (DRS) in the solid phase andUV-Visible spectroscopy in the aqueous medium. X-ray diffraction (XRD) analysis revealed the composite nature of the catalysts with the retention of individual identity of each component. The average crystallite size of the individual component was found to be in the range of 20 to 40 nm. Scanning electron microscopy (SEM) analysis authenticated the presence of CuO and ZrO2 at the surface of Al2O3-TiO2 support, while Rutherford Back Scattering Spectroscopy (RBS) confirmed the quantity of the modifiers as per theoretical calculations. The composites showed an enhanced photocatalytic activity in sunlight compared to Al2O3-TiO2 for the degradation of dyes. Efforts were made to elucidate the enhanced sunlight response of the synthesized composite catalysts compared to Al2O3-TiO2. As monitored by ion chromatography (IC), the synthesized photocatalysts completely mineralized the dyes leaving behind inorganic ions in solution. The kinetics of photocatalytic degradation of dyes was evaluated for optimum correlation with the existing models. The stability of the photocatalysts against the photo-corrosion was monitored by analyzing the samples for respective metals in solution after sunlight exposure. 
ISSN : 1093-4529 
Journal Name : Journal of Environmental Science and Health 
Volume : 49 
Issue Number : 2014 
Publishing Year : 1435 AH
2014 AD 
Article Type : Article 
Added Date : Monday, December 16, 2013 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ZULFIQAR ALIALI, ZULFIQAR Researcher  
M. ASLAMASLAM, M. Researcher  
IQBAL M.I. ISMAILISMAIL, IQBAL M.I.Researcher  
A. HAMEEDHAMEED, A. Researcher  
SYED TAJAMMUL HUSSAINHUSSAIN, SYED TAJAMMULResearcher  
MUHAMMAD NAWAZ CHAUDHRYCHAUDHRY, MUHAMMAD NAWAZResearcher  
M.A. GONDALGONDAL, M.A. Researcher  

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