One-Pot Synthesis of W-TiO2SiO2 Catalysts for the Photodegradation of p-Nitrophenol
Joint Authors
Sánchez, Ulises Arellano
Chen, Lifang
Wang, Jin An
Noreña, Luis Enrique
Asomoza, Maximiliano
Solis, Silvia
Zhou, Xiaolong
Song, Yueqin
Liu, Jing
Source
International Journal of Photoenergy
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-13, 13 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-08-01
Country of Publication
Egypt
No. of Pages
13
Main Subjects
Abstract EN
Double modifications of TiO2 by doping with WO3 and by dispersing on a SiO2 support were made by the one-pot sol-gel method.
Doping with W shifts the TiO2 band gap energy from 3.2 eV to around 3.06 eV.
The surface area of the supported W-TiO2/SiO2 material was significantly increased, by approximately 3 times, in comparison to the bare TiO2.
The photocatalytic activities of the catalysts were evaluated in the degradation reaction of p-nitrophenol in aqueous solution and basic medium.
After 240 min of photodegradation, more than approximately 99% p-nitrophenol could be mineralized with the most active W-TiO2/SiO2 catalyst.
Under UV irradiation, p-nitrophenol was initially photodegraded into hydroquinone and benzosemiquinone intermediates, which were further degraded into smaller fragments such as organic carboxylic acids and finally completely mineralized.
A proposed photoreaction mechanism was presented based on the key roles of the surface hydroxyl species and superoxide radicals such as O2- and ⋅OH, together with W6+/W5+ couples and e-/h+ pairs in the catalysts in the p-nitrophenol photodegradation.
The one-pot sol-gel synthesis method was proven to be effective to obtain W-TiO2/SiO2 catalyst with large surface area and high photocatalytic activity, and it can be also used for the preparation of other heterogeneous catalysts.
American Psychological Association (APA)
Sánchez, Ulises Arellano& Chen, Lifang& Wang, Jin An& Noreña, Luis Enrique& Asomoza, Maximiliano& Solis, Silvia…[et al.]. 2019. One-Pot Synthesis of W-TiO2SiO2 Catalysts for the Photodegradation of p-Nitrophenol. International Journal of Photoenergy،Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1167241
Modern Language Association (MLA)
Sánchez, Ulises Arellano…[et al.]. One-Pot Synthesis of W-TiO2SiO2 Catalysts for the Photodegradation of p-Nitrophenol. International Journal of Photoenergy No. 2019 (2019), pp.1-13.
https://search.emarefa.net/detail/BIM-1167241
American Medical Association (AMA)
Sánchez, Ulises Arellano& Chen, Lifang& Wang, Jin An& Noreña, Luis Enrique& Asomoza, Maximiliano& Solis, Silvia…[et al.]. One-Pot Synthesis of W-TiO2SiO2 Catalysts for the Photodegradation of p-Nitrophenol. International Journal of Photoenergy. 2019. Vol. 2019, no. 2019, pp.1-13.
https://search.emarefa.net/detail/BIM-1167241
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1167241