تفاصيل الوثيقة

نوع الوثيقة : مقال في مجلة دورية 
عنوان الوثيقة :
تخليق بودرة على شكل أقراص متجانسة الأشكال من أكسيد التانجستوم وتقدير نشاطه كمحفز الضوئى لتكسر الفينول
Morphology controlled bulk synthesis of disc-shaped WO3 powder and evaluation of its photocatalytic activity for the degradation of phenols
 
الموضوع : علوم البيئة 
لغة الوثيقة : الانجليزية 
المستخلص : 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. 
ردمد : 00304-3894 
اسم الدورية : Journal of Hazardous Materials 
المجلد : 276 
العدد : 1 
سنة النشر : 1435 هـ
2014 م 
نوع المقالة : مقالة علمية 
تاريخ الاضافة على الموقع : Monday, August 4, 2014 

الباحثون

اسم الباحث (عربي)اسم الباحث (انجليزي)نوع الباحثالمرتبة العلميةالبريد الالكتروني
M. AslamAslam, M. باحث  
Iqbal M.I. IsmailIsmail, Iqbal M.I.باحث  
S. ChandrasekaranChandrasekaran, S. باحث  
A. HameedHameed, A. باحث hameedch@yahoo.com

الملفات

اسم الملفالنوعالوصف
 37277.pdf pdfMorphology controlled bulk synthesis of disc-shaped WO3 powder and evaluation of its photocatalytic activity for the degradation of phenols

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