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Intermediate formation during photodegradation of phenol using lanthanum doped tin dioxide nanoparticles
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM. Sultan Qaboos University, Oman.ORCID iD: 0000-0002-0074-3504
2016 (English)In: Research on chemical intermediates (Print), ISSN 0922-6168, E-ISSN 1568-5675, Vol. 42, no 4, 3055-3069 p.Article in journal (Refereed) Published
Abstract [en]

Lanthanum (La)-doped tin dioxide (SnO<inf>2</inf>) nanoparticles were synthesized by a modified sol–gel method at room temperature. The samples were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The photocatalytic activity of La:SnO<inf>2</inf> samples were investigated by studying the degradation profile of phenol and its by-products in water. The treated samples were analyzed by HPLC–UV and a UV–Vis spectrophotometer. Benzoquinone, catechol, resorcinol, hydroquinone, acetic acid, and 2-propanol were identified as phenol degradation intermediates. Maximum concentration acquired was in the order of catechol, resorcinol, hydroquinone, and benzoquinone, which was observed in the beginning stages while iso-propanol and acetic acid were observed in the final stages of phenol degradation. We achieved a complete photodegradation of a 10 ppm aqueous phenol solution and intermediates with 0.6 % of SnO<inf>2</inf>:La nanoparticles in 120 min under artificial solar irradiation. A maximum degradation rate constant of 0.02228 min−1 of propanol and a minimum of acetic acid 0.013412 min−1 were recorded at 37 °C.

Place, publisher, year, edition, pages
Springer Netherlands, 2016. Vol. 42, no 4, 3055-3069 p.
Keyword [en]
By-product, Lanthanum, Phenol, Photocatalysis, Rare earth metal, SnO2, Acetic acid, Biodegradation, Byproducts, Degradation, Electron microscopy, High resolution transmission electron microscopy, Lanthanum oxides, Nanoparticles, Organic acids, pH, Propanol, Rate constants, Scanning electron microscopy, Sols, Synthesis (chemical), Tin, Tin dioxide, Transmission electron microscopy, Water treatment, X ray diffraction, Degradation profiles, Degradation rate constants, Intermediate formation, Maximum concentrations, Phenol degradation, Photocatalytic activities, Rare earth metals, Tin dioxide nanoparticles, Phenols
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-176176DOI: 10.1007/s11164-015-2197-9ISI: 000372159200022ScopusID: 2-s2.0-84938633190OAI: diva2:866203

QC 20151102

Available from: 2015-11-02 Created: 2015-11-02 Last updated: 2016-04-25Bibliographically approved

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Dutta, Joydeep
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