Center of Excellence in Environmental Studies | Researches | Morphology controlled bulk synthesis of disc-shaped WO3 powder and evaluation of its photocatalytic activity for the degradation of phenols

Center of Excellence in Environmental Studies

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 Type	Dr Grade	Email
M. Aslam	Aslam, M.	Researcher
Iqbal M.I. Ismail	Ismail, Iqbal M.I.	Researcher
S. Chandrasekaran	Chandrasekaran, S.	Researcher
A. Hameed	Hameed, A.	Researcher		hameedch@yahoo.com

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