Heterogeneous photocatalytic degradation of chlorophenols over Ag-TiO 2 nano particles in an aqueous suspension

Selvaraj Rengaraj*, Jei Won Yeon, Xiang Zhong Li, Yongju Jung, Won Ho Kim

*المؤلف المقابل لهذا العمل

نتاج البحث

3 اقتباسات (Scopus)

ملخص

In the present work, TiO2 and Ag-TiO2 catalysts were prepared by an ultrasonic assisted sol-gel method. The physico-chemical characteristics studies of the newly synthesized catalysts were carried out by XRD, TEM, EDX, XPS, UV-Visible absorption spectra and an optical ellipsometry. In order to find out the optical absorption properties of the catalysts, theoretical simulations have been carried out by using the Tauc-Lorentz oscillator model. Photodegradation and mineralisation of the chlorophenols were confirmed by the HPLC and TOC measurements. The rate of a mineralisation trend was observed in the order of P < 2-CP < 2,4-DCP < 2,6-DCP < 4-CP < 2,4,6-TCP by using the Ag-TiO2 catalyst. The concentration of the main aromatic intermediate products was considerably lower for the Ag-TiO2 photocatalysts than for pure TiO2. This experiment demonstrated that the presence of Ag on TiO2 catalysts could enhance the photocatalytic oxidation of chlorophenols in an aqueous suspension. It was found that the degradation of the chlorphenols by these catalysts followed the pseudo- first order kinetic model.

اللغة الأصليةEnglish
عنوان منشور المضيفAdvances in Nanomaterials and Processing - IUMRS - ICA - 2006 International Conference in Asia
ناشرTrans Tech Publications Ltd
الصفحات1745-1748
عدد الصفحات4
طبعةPART 2
رقم المعيار الدولي للكتب (المطبوع)3908451310, 9783908451310
المعرِّفات الرقمية للأشياء
حالة النشرPublished - 2007
منشور خارجيًانعم
الحدثIUMRS International Conference in Asia 2006, IUMRS-ICA 2006 - Jeju
المدة: سبتمبر ١٠ ٢٠٠٦سبتمبر ١٤ ٢٠٠٦

سلسلة المنشورات

الاسمSolid State Phenomena
الرقمPART 2
مستوى الصوت124-126
رقم المعيار الدولي للدوريات (المطبوع)1012-0394

Other

OtherIUMRS International Conference in Asia 2006, IUMRS-ICA 2006
الدولة/الإقليمKorea, Republic of
المدينةJeju
المدة٩/١٠/٠٦٩/١٤/٠٦

ASJC Scopus subject areas

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