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Gadolinium doped tin dioxide nanoparticles: an efficient visible light active photocatalyst
KTH, School of Information and Communication Technology (ICT), Materials- and Nano Physics, Functional Materials, FNM.ORCID iD: 0000-0002-0074-3504
2015 (English)In: Journal of Rare Earths, ISSN 1002-0721, Vol. 33, no 12, 1275-1283 p.Article in journal (Refereed) PublishedText
Abstract [en]

Photocatalytic degradation of phenol with sol-gel prepared rare earth doped tin dioxide (SnO2) nanoparticles was reported. Gadolinium doped tin dioxide (SnO2:Gd) nanoparticles were found to absorb higher visible light compared to lanthanum, neodymium and cerium doped materials that were studied in detail. Photocatalytic degradation of phenol under artificial white light and sunlight in the presence of SnO2: Gd nanoparticles was studied with high performance liquid chromatography (HPLC), capillary electrophoresis (CE), total organic carbon (TOC) measurements and the determination of chemical oxygen demand (COD). Clear correlations between the results obtained from these multiple measurements were found, and a kinetic pathway for the degradation process was proposed. Within 150 min of solar irradiation, the TOC of a 10 ppm phenol solution in water was reduced by 95%-99%, thus demonstrating that SnO2: Gd nanoparticles are efficient visible light photocatalysts.

Place, publisher, year, edition, pages
Elsevier, 2015. Vol. 33, no 12, 1275-1283 p.
Keyword [en]
rare earth dopants, solar irradiation, phenol photo-degradation, tin dioxide nanoparticles, organic by-products
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:kth:diva-180234DOI: 10.1016/S1002-0721(14)60557-3ISI: 000366304200007ScopusID: 2-s2.0-84949510119OAI: oai:DiVA.org:kth-180234DiVA: diva2:895413
Note

QC 20160119

Available from: 2016-01-19 Created: 2016-01-08 Last updated: 2016-01-19Bibliographically approved

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Dutta, Joydeep
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