Document Details

Document Type : Article In Journal 
Document Title :
Morphology controlled bulk synthesis of disc-shaped WO3 powder and evaluation of its photocatalytic activity for the degradation of phenols
تخليق بودرة على شكل أقراص متجانسة الأشكال من أكسيد التانجستوم وتقدير نشاطه كمحفز الضوئى لتكسر الفينول
 
Subject : Enviromental sciences 
Document Language : English 
Abstract : The surfactant assisted synthesis of disc-shaped WO3 powder and its photocatalytic performance in sunlight exposure is reported. UV–vis DRS, XRD and FESEM characterized the synthesized WO3. The synthesized powder exhibited a bandgap of ∼2.55 eV with cubic lattice and high crystallinity. The pho-tocatalytic activity of the synthesized WO3 was examined for the degradation of phenol, resorcinol, 2-chlorophenol and 2-nitrophenol in complete spectrum and visible segment of sunlight. The highly efficient degradation/mineralization of 2-chloro and 2-nitrophenol compared to that of phenol and resor-cinol, under identical experimental conditions, suggested the regulatory role of substituents attached to the aromatic ring in degradation/mineralization process. The time-scale HPLC degradation profiles, iden-tification of intermediates by GC-MS and removal of organic carbon during the course of reaction were utilized to approximate the possible route of degradation/mineralization of phenolic substrates. The mea-surement of the anions released during the photocatalytic process was used to identify the nature of the major oxidants (O2•−, OH•) and the possible interaction sites. A significant decrease in the photocatalytic activity of synthesized WO3, ∼50%, was observed in visible portion of sunlight however, a sustained activity was observed in the repeated exposures. 
ISSN : 00304-3894 
Journal Name : Journal of Hazardous Materials 
Volume : 276 
Issue Number : 1 
Publishing Year : 1435 AH
2014 AD 
Article Type : Article 
Added Date : Monday, August 4, 2014 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
M. AslamAslam, M. Researcher  
Iqbal M.I. IsmailIsmail, Iqbal M.I.Researcher  
S. ChandrasekaranChandrasekaran, S. Researcher  
A. HameedHameed, A. Researcher hameedch@yahoo.com

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