Improvement of catalytic activity and mechanistic analysis of transition metal ion doped nanoCeO2 by aqueous Rhodamine B degradation View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2015-09-04

AUTHORS

Lianli Zou, Xiangqian Shen, Qiuju Wang, Zhou Wang, Xinchun Yang, Maoxiang Jing

ABSTRACT

We compared the enhancement of photoactivity of transition metal ion (1 mol% Fe, Cu, Mn, and Zn) doped CeO 2 nanocatalysts, and examined the effects of oxygen vacancies and the valence of the doped ions. The nanocatalysts were synthesized using a coprecipitation method and were characterized by x-ray diffraction, scanning electron microscopy, transmission electron microscopy, Brunauer–Emmett–Teller isotherm methods and Raman spectroscopy. The photocatalytic activities of these catalysts were tested using aqueous Rhodamine B (RhB) degradation under UV irradiation. The spherical CeO 2 nanocatalysts had a mesoporous structure and ∼15 nm average particle size. The catalytic activity was closely related to the oxygen vacancies and the valence of the doped ions. An increase in oxygen vacancies of doped CeO 2 decreased the photocatalytic activity. The photocatalytic activities of the catalysts decreased in the order: 1 mol% Fe > Cu > Mn > Zn > undoped CeO 2 . The 1 mol% Fe doped CeO 2 degraded ∼92.6% of the RhB after 3 h of irradiation, and the degradation obeyed pseudo-first-order kinetics. Liquid chromatography–mass spectrometry indicated that the photodegradation of RhB was a stepwise oxidation process. Under continuous oxidation, over a long reaction time, the RhB was completely oxidized to its final products, such as water and carbon dioxide. More... »

PAGES

2763-2771

Identifiers

URI

http://scigraph.springernature.com/pub.10.1557/jmr.2015.263

DOI

http://dx.doi.org/10.1557/jmr.2015.263

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1005908246


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