Novel diatom-FeOx composite as highly active catalyst in photodegradation of Rhodamine-6G

Document Type

Article

Publication Date

6-27-2018

Abstract

We report the study of nanoporous silica-iron oxide composite generated from diatom frustules as a highly active catalyst for the photodegradation of the dye Rhodamine-6G. The unique architecture and high surface area of diatoms were utilized to immobilize iron oxide on their surface to form the composite. Photodegradation was carried out under 365-nm radiation and was observed using the absorption spectrum of the dye. The reaction was found to follow pseudo-first-order kinetics. The results were compared with commercially available granular iron oxide. The rate constant K (min-1) for photodegradation by the diatom composite was found to be as high as 0.0584 min-1 for diatom-FeOx composites, which is 52% higher than 0.0273 min-1 for granular FeOx at a dye concentration of 0.02 mm. The unique structural morphology and the synthetic strategy have led to the composites showing superior activity in the degradation of the dye Rhodamine-6G.

Identifier

85046721745 (Scopus)

Publication Title

Nanotechnology Reviews

External Full Text Location

https://doi.org/10.1515/ntrev-2017-0218

e-ISSN

21919097

ISSN

21919089

First Page

247

Last Page

255

Issue

3

Volume

7

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