Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Rod-like β-FeOOH@poly(dopamine)–Au–poly(dopamine) nanocatalysts with improved recyclable activities

Language

English

Abstract

© The Royal Society of Chemistry 2015. A novel rod-like β-FeOOH@poly(dopamine)-Au-poly(dopamine) nanocomposite is developed for recyclable catalysis. Firstly, the rod-like β-FeOOH template was coated in situ by a layer of poly(dopamine) (PDA) to form a core/shell nanostructure. Then the negatively charged Au nanocatalysts were well-immobilized onto the periphery of the β-FeOOH@PDA nanorod. To protect the Au nanocrystals from leaching during the catalytic reactions, another PDA layer was coated onto the above particles to form a sandwich-like PDA-Au-PDA shell on the β-FeOOH rod core. The reduction of Rhodamine B (RhB) was introduced as a model reaction to evaluate the catalytic activity of the as-prepared nanocomposites. It was found that the catalytic rate sharply increased with an increasing amount of the nanocatalyst. Benefitting from the thin outer layer of PDA, the recyclability of the nanocatalyst dramatically increased. After five times of catalytic reaction, the activity was maintained as high as 98.3%, while the β-FeOOH@PDA-Au showed it to be retained at only 73.4%.

Publication Date

2015

Source Publication Title

Dalton Transactions

Volume

44

Issue

20

Start Page

9538

End Page

9544

Publisher

Royal Society of Chemistry

DOI

10.1039/C5DT00913H

Link to Publisher's Edition

http://dx.doi.org/10.1039/C5DT00913H

ISSN (print)

14779226

ISSN (electronic)

14779234

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