Photocatalytic Degradation of Dichlorvos in Visible Light by Mg2+-TiO2 Nanocatalyst
Joint Authors
Subrahmanyam, C.
Segne, Teshome Abdo
Susmitha, T.
Siva Rao, T.
Balaram Kiran, A.
Source
Advances in Materials Science and Engineering
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-05-20
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Engineering Sciences and Information Technology
Abstract EN
Photocatalytic activity of TiO2 was studied by doping with magnesium (Mg2+-TiO2) with varying magnesium weight percentages ranging from 0.75–1.5 wt%.
The doped and undoped samples were synthesized by sol-gel method and characterized by X-ray diffraction (XRD), N2 adsorption-desorption (BET), X-ray photoelectron spectroscopy (XPS), UV-visible diffuse reflectance spectroscopy (DRS), and scanning electron microscopy (SEM).
The XRD data has shown that anatase crystalline phase in Mg2+-TiO2 catalysts, indicating that Mg2+ ions did not influence the crystal patterns of TiO2.
The presence of magnesium ions in TiO2 matrix has been determined by XPS spectra.
DRS spectra showed that there is a significant absorption shift towards the visible region for doped TiO2.
The SEM images and BET results showed that doped catalyst has smaller particle size and highest surface area than undoped TiO2.
The photocatalytic efficiency of the synthesized catalysts was investigated by the photocatalytic degradation of aqueous dichlorvos (DDVP) under visible light irradiation, and it was found that the Mg2+-doped catalysts have better catalytic activity than undoped TiO2.
This can be attributed that there is a more efficient electron-hole creation in Mg2+-TiO2 in visible light, contrary to undoped TiO2 which can be excited only in UV irradiation.
The effect of dopant concentration, pH of solution, dosage of catalysts, and initial pesticide concentration has been studied.
American Psychological Association (APA)
Siva Rao, T.& Segne, Teshome Abdo& Susmitha, T.& Balaram Kiran, A.& Subrahmanyam, C.. 2012. Photocatalytic Degradation of Dichlorvos in Visible Light by Mg2+-TiO2 Nanocatalyst. Advances in Materials Science and Engineering،Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-451356
Modern Language Association (MLA)
Siva Rao, T.…[et al.]. Photocatalytic Degradation of Dichlorvos in Visible Light by Mg2+-TiO2 Nanocatalyst. Advances in Materials Science and Engineering No. 2012 (2012), pp.1-9.
https://search.emarefa.net/detail/BIM-451356
American Medical Association (AMA)
Siva Rao, T.& Segne, Teshome Abdo& Susmitha, T.& Balaram Kiran, A.& Subrahmanyam, C.. Photocatalytic Degradation of Dichlorvos in Visible Light by Mg2+-TiO2 Nanocatalyst. Advances in Materials Science and Engineering. 2012. Vol. 2012, no. 2012, pp.1-9.
https://search.emarefa.net/detail/BIM-451356
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-451356